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['Ji Young Lee', 'Franck Dernoncourt', 'Ozlem Uzuner', 'Peter Szolovits']
1610.09704v1
Patient notes contain a wealth of information of potentially great interest to medical investigators. However, to protect patients' privacy, Protected Health Information (PHI) must be removed from the patient notes before they can be legally released, a process known as patient note de-identification. The main objective for a de-identification system is to have the highest possible recall. Recently, the first neural-network-based de-identification system has been proposed, yielding state-of-the-art results. Unlike other systems, it does not rely on human-engineered features, which allows it to be quickly deployed, but does not leverage knowledge from human experts or from electronic health records (EHRs). In this work, we explore a method to incorporate human-engineered features as well as features derived from EHRs to a neural-network-based de-identification system. Our results show that the addition of features, especially the EHR-derived features, further improves the state-of-the-art in patient note de-identification, including for some of the most sensitive PHI types such as patient names. Since in a real-life setting patient notes typically come with EHRs, we recommend developers of de-identification systems to leverage the information EHRs contain.
Feature-Augmented Neural Networks for Patient Note De-identification
2,016
http://arxiv.org/pdf/1610.09704v1
Title FeatureAugmented Neural Networks Patient Note Deidentification Summary Patient note contain wealth information potentially great interest medical investigator However protect patient privacy Protected Health Information PHI must removed patient note legally released process known patient note deidentification main objective deidentification system highest possible recall Recently first neuralnetworkbased deidentification system proposed yielding stateoftheart result Unlike system rely humanengineered feature allows quickly deployed leverage knowledge human expert electronic health record EHRs work explore method incorporate humanengineered feature well feature derived EHRs neuralnetworkbased deidentification system result show addition feature especially EHRderived feature improves stateoftheart patient note deidentification including sensitive PHI type patient name Since reallife setting patient note typically come EHRs recommend developer deidentification system leverage information EHRs contain Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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501
501
['Kartik Audhkhasi', 'Bhuvana Ramabhadran', 'George Saon', 'Michael Picheny', 'David Nahamoo']
1703.07754v1
Recent work on end-to-end automatic speech recognition (ASR) has shown that the connectionist temporal classification (CTC) loss can be used to convert acoustics to phone or character sequences. Such systems are used with a dictionary and separately-trained Language Model (LM) to produce word sequences. However, they are not truly end-to-end in the sense of mapping acoustics directly to words without an intermediate phone representation. In this paper, we present the first results employing direct acoustics-to-word CTC models on two well-known public benchmark tasks: Switchboard and CallHome. These models do not require an LM or even a decoder at run-time and hence recognize speech with minimal complexity. However, due to the large number of word output units, CTC word models require orders of magnitude more data to train reliably compared to traditional systems. We present some techniques to mitigate this issue. Our CTC word model achieves a word error rate of 13.0%/18.8% on the Hub5-2000 Switchboard/CallHome test sets without any LM or decoder compared with 9.6%/16.0% for phone-based CTC with a 4-gram LM. We also present rescoring results on CTC word model lattices to quantify the performance benefits of a LM, and contrast the performance of word and phone CTC models.
Direct Acoustics-to-Word Models for English Conversational Speech Recognition
2,017
http://arxiv.org/pdf/1703.07754v1
Title Direct AcousticstoWord Models English Conversational Speech Recognition Summary Recent work endtoend automatic speech recognition ASR shown connectionist temporal classification CTC loss used convert acoustic phone character sequence system used dictionary separatelytrained Language Model LM produce word sequence However truly endtoend sense mapping acoustic directly word without intermediate phone representation paper present first result employing direct acousticstoword CTC model two wellknown public benchmark task Switchboard CallHome model require LM even decoder runtime hence recognize speech minimal complexity However due large number word output unit CTC word model require order magnitude data train reliably compared traditional system present technique mitigate issue CTC word model achieves word error rate 130188 Hub52000 SwitchboardCallHome test set without LM decoder compared 96160 phonebased CTC 4gram LM also present rescoring result CTC word model lattice quantify performance benefit LM contrast performance word phone CTC model Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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502
502
['Oleksii Kuchaiev', 'Boris Ginsburg']
1703.10722v3
We present two simple ways of reducing the number of parameters and accelerating the training of large Long Short-Term Memory (LSTM) networks: the first one is "matrix factorization by design" of LSTM matrix into the product of two smaller matrices, and the second one is partitioning of LSTM matrix, its inputs and states into the independent groups. Both approaches allow us to train large LSTM networks significantly faster to the near state-of the art perplexity while using significantly less RNN parameters.
Factorization tricks for LSTM networks
2,017
http://arxiv.org/pdf/1703.10722v3
Title Factorization trick LSTM network Summary present two simple way reducing number parameter accelerating training large Long ShortTerm Memory LSTM network first one matrix factorization design LSTM matrix product two smaller matrix second one partitioning LSTM matrix input state independent group approach allow u train large LSTM network significantly faster near stateof art perplexity using significantly le RNN parameter Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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503
503
['Franck Dernoncourt', 'Ji Young Lee', 'Peter Szolovits']
1705.05487v1
Named-entity recognition (NER) aims at identifying entities of interest in a text. Artificial neural networks (ANNs) have recently been shown to outperform existing NER systems. However, ANNs remain challenging to use for non-expert users. In this paper, we present NeuroNER, an easy-to-use named-entity recognition tool based on ANNs. Users can annotate entities using a graphical web-based user interface (BRAT): the annotations are then used to train an ANN, which in turn predict entities' locations and categories in new texts. NeuroNER makes this annotation-training-prediction flow smooth and accessible to anyone.
NeuroNER: an easy-to-use program for named-entity recognition based on neural networks
2,017
http://arxiv.org/pdf/1705.05487v1
Title NeuroNER easytouse program namedentity recognition based neural network Summary Namedentity recognition NER aim identifying entity interest text Artificial neural network ANNs recently shown outperform existing NER system However ANNs remain challenging use nonexpert user paper present NeuroNER easytouse namedentity recognition tool based ANNs Users annotate entity using graphical webbased user interface BRAT annotation used train ANN turn predict entity location category new text NeuroNER make annotationtrainingprediction flow smooth accessible anyone Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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504
504
['Zhenisbek Assylbekov', 'Rustem Takhanov', 'Bagdat Myrzakhmetov', 'Jonathan N. Washington']
1707.06480v1
Syllabification does not seem to improve word-level RNN language modeling quality when compared to character-based segmentation. However, our best syllable-aware language model, achieving performance comparable to the competitive character-aware model, has 18%-33% fewer parameters and is trained 1.2-2.2 times faster.
Syllable-aware Neural Language Models: A Failure to Beat Character-aware Ones
2,017
http://arxiv.org/pdf/1707.06480v1
Title Syllableaware Neural Language Models Failure Beat Characteraware Ones Summary Syllabification seem improve wordlevel RNN language modeling quality compared characterbased segmentation However best syllableaware language model achieving performance comparable competitive characteraware model 1833 fewer parameter trained 1222 time faster Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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505
505
['Iñigo Casanueva', 'Paweł Budzianowski', 'Pei-Hao Su', 'Nikola Mrkšić', 'Tsung-Hsien Wen', 'Stefan Ultes', 'Lina Rojas-Barahona', 'Steve Young', 'Milica Gašić']
1711.11023v1
Dialogue assistants are rapidly becoming an indispensable daily aid. To avoid the significant effort needed to hand-craft the required dialogue flow, the Dialogue Management (DM) module can be cast as a continuous Markov Decision Process (MDP) and trained through Reinforcement Learning (RL). Several RL models have been investigated over recent years. However, the lack of a common benchmarking framework makes it difficult to perform a fair comparison between different models and their capability to generalise to different environments. Therefore, this paper proposes a set of challenging simulated environments for dialogue model development and evaluation. To provide some baselines, we investigate a number of representative parametric algorithms, namely deep reinforcement learning algorithms - DQN, A2C and Natural Actor-Critic and compare them to a non-parametric model, GP-SARSA. Both the environments and policy models are implemented using the publicly available PyDial toolkit and released on-line, in order to establish a testbed framework for further experiments and to facilitate experimental reproducibility.
A Benchmarking Environment for Reinforcement Learning Based Task Oriented Dialogue Management
2,017
http://arxiv.org/pdf/1711.11023v1
Title Benchmarking Environment Reinforcement Learning Based Task Oriented Dialogue Management Summary Dialogue assistant rapidly becoming indispensable daily aid avoid significant effort needed handcraft required dialogue flow Dialogue Management DM module cast continuous Markov Decision Process MDP trained Reinforcement Learning RL Several RL model investigated recent year However lack common benchmarking framework make difficult perform fair comparison different model capability generalise different environment Therefore paper proposes set challenging simulated environment dialogue model development evaluation provide baseline investigate number representative parametric algorithm namely deep reinforcement learning algorithm DQN A2C Natural ActorCritic compare nonparametric model GPSARSA environment policy model implemented using publicly available PyDial toolkit released online order establish testbed framework experiment facilitate experimental reproducibility Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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506
506
['Zhenisbek Assylbekov', 'Rustem Takhanov']
1802.08375v1
We propose several ways of reusing subword embeddings and other weights in subword-aware neural language models. The proposed techniques do not benefit a competitive character-aware model, but some of them improve the performance of syllable- and morpheme-aware models while showing significant reductions in model sizes. We discover a simple hands-on principle: in a multi-layer input embedding model, layers should be tied consecutively bottom-up if reused at output. Our best morpheme-aware model with properly reused weights beats the competitive word-level model by a large margin across multiple languages and has 20%-87% fewer parameters.
Reusing Weights in Subword-aware Neural Language Models
2,018
http://arxiv.org/pdf/1802.08375v1
Title Reusing Weights Subwordaware Neural Language Models Summary propose several way reusing subword embeddings weight subwordaware neural language model proposed technique benefit competitive characteraware model improve performance syllable morphemeaware model showing significant reduction model size discover simple handson principle multilayer input embedding model layer tied consecutively bottomup reused output best morphemeaware model properly reused weight beat competitive wordlevel model large margin across multiple language 2087 fewer parameter Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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507
507
['Isabelle Augenstein', 'Sebastian Ruder', 'Anders Søgaard']
1802.09913v1
We combine multi-task learning and semi-supervised learning by inducing a joint embedding space between disparate label spaces and learning transfer functions between label embeddings, enabling us to jointly leverage unlabelled data and auxiliary, annotated datasets. We evaluate our approach on a variety of sequence classification tasks with disparate label spaces. We outperform strong single and multi-task baselines and achieve a new state-of-the-art for aspect- and topic-based sentiment analysis.
Multi-task Learning of Pairwise Sequence Classification Tasks Over Disparate Label Spaces
2,018
http://arxiv.org/pdf/1802.09913v1
Title Multitask Learning Pairwise Sequence Classification Tasks Disparate Label Spaces Summary combine multitask learning semisupervised learning inducing joint embedding space disparate label space learning transfer function label embeddings enabling u jointly leverage unlabelled data auxiliary annotated datasets evaluate approach variety sequence classification task disparate label space outperform strong single multitask baseline achieve new stateoftheart aspect topicbased sentiment analysis Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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508
508
['Caiming Xiong', 'Stephen Merity', 'Richard Socher']
1603.01417v1
Neural network architectures with memory and attention mechanisms exhibit certain reasoning capabilities required for question answering. One such architecture, the dynamic memory network (DMN), obtained high accuracy on a variety of language tasks. However, it was not shown whether the architecture achieves strong results for question answering when supporting facts are not marked during training or whether it could be applied to other modalities such as images. Based on an analysis of the DMN, we propose several improvements to its memory and input modules. Together with these changes we introduce a novel input module for images in order to be able to answer visual questions. Our new DMN+ model improves the state of the art on both the Visual Question Answering dataset and the \babi-10k text question-answering dataset without supporting fact supervision.
Dynamic Memory Networks for Visual and Textual Question Answering
2,016
http://arxiv.org/pdf/1603.01417v1
Title Dynamic Memory Networks Visual Textual Question Answering Summary Neural network architecture memory attention mechanism exhibit certain reasoning capability required question answering One architecture dynamic memory network DMN obtained high accuracy variety language task However shown whether architecture achieves strong result question answering supporting fact marked training whether could applied modality image Based analysis DMN propose several improvement memory input module Together change introduce novel input module image order able answer visual question new DMN model improves state art Visual Question Answering dataset babi10k text questionanswering dataset without supporting fact supervision Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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509
509
['Fabio Carrara', 'Andrea Esuli', 'Tiziano Fagni', 'Fabrizio Falchi', 'Alejandro Moreo Fernández']
1606.07287v1
In this paper we tackle the problem of image search when the query is a short textual description of the image the user is looking for. We choose to implement the actual search process as a similarity search in a visual feature space, by learning to translate a textual query into a visual representation. Searching in the visual feature space has the advantage that any update to the translation model does not require to reprocess the, typically huge, image collection on which the search is performed. We propose Text2Vis, a neural network that generates a visual representation, in the visual feature space of the fc6-fc7 layers of ImageNet, from a short descriptive text. Text2Vis optimizes two loss functions, using a stochastic loss-selection method. A visual-focused loss is aimed at learning the actual text-to-visual feature mapping, while a text-focused loss is aimed at modeling the higher-level semantic concepts expressed in language and countering the overfit on non-relevant visual components of the visual loss. We report preliminary results on the MS-COCO dataset.
Picture It In Your Mind: Generating High Level Visual Representations From Textual Descriptions
2,016
http://arxiv.org/pdf/1606.07287v1
Title Picture Mind Generating High Level Visual Representations Textual Descriptions Summary paper tackle problem image search query short textual description image user looking choose implement actual search process similarity search visual feature space learning translate textual query visual representation Searching visual feature space advantage update translation model require reprocess typically huge image collection search performed propose Text2Vis neural network generates visual representation visual feature space fc6fc7 layer ImageNet short descriptive text Text2Vis optimizes two loss function using stochastic lossselection method visualfocused loss aimed learning actual texttovisual feature mapping textfocused loss aimed modeling higherlevel semantic concept expressed language countering overfit nonrelevant visual component visual loss report preliminary result MSCOCO dataset Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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510
510
['Marc Tanti', 'Albert Gatt', 'Kenneth P. Camilleri']
1703.09137v2
When a recurrent neural network language model is used for caption generation, the image information can be fed to the neural network either by directly incorporating it in the RNN -- conditioning the language model by `injecting' image features -- or in a layer following the RNN -- conditioning the language model by `merging' image features. While both options are attested in the literature, there is as yet no systematic comparison between the two. In this paper we empirically show that it is not especially detrimental to performance whether one architecture is used or another. The merge architecture does have practical advantages, as conditioning by merging allows the RNN's hidden state vector to shrink in size by up to four times. Our results suggest that the visual and linguistic modalities for caption generation need not be jointly encoded by the RNN as that yields large, memory-intensive models with few tangible advantages in performance; rather, the multimodal integration should be delayed to a subsequent stage.
Where to put the Image in an Image Caption Generator
2,017
http://arxiv.org/pdf/1703.09137v2
Title put Image Image Caption Generator Summary recurrent neural network language model used caption generation image information fed neural network either directly incorporating RNN conditioning language model injecting image feature layer following RNN conditioning language model merging image feature option attested literature yet systematic comparison two paper empirically show especially detrimental performance whether one architecture used another merge architecture practical advantage conditioning merging allows RNNs hidden state vector shrink size four time result suggest visual linguistic modality caption generation need jointly encoded RNN yield large memoryintensive model tangible advantage performance rather multimodal integration delayed subsequent stage Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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511
511
['Ilija Ilievski', 'Shuicheng Yan', 'Jiashi Feng']
1604.01485v1
Visual Question and Answering (VQA) problems are attracting increasing interest from multiple research disciplines. Solving VQA problems requires techniques from both computer vision for understanding the visual contents of a presented image or video, as well as the ones from natural language processing for understanding semantics of the question and generating the answers. Regarding visual content modeling, most of existing VQA methods adopt the strategy of extracting global features from the image or video, which inevitably fails in capturing fine-grained information such as spatial configuration of multiple objects. Extracting features from auto-generated regions -- as some region-based image recognition methods do -- cannot essentially address this problem and may introduce some overwhelming irrelevant features with the question. In this work, we propose a novel Focused Dynamic Attention (FDA) model to provide better aligned image content representation with proposed questions. Being aware of the key words in the question, FDA employs off-the-shelf object detector to identify important regions and fuse the information from the regions and global features via an LSTM unit. Such question-driven representations are then combined with question representation and fed into a reasoning unit for generating the answers. Extensive evaluation on a large-scale benchmark dataset, VQA, clearly demonstrate the superior performance of FDA over well-established baselines.
A Focused Dynamic Attention Model for Visual Question Answering
2,016
http://arxiv.org/pdf/1604.01485v1
Title Focused Dynamic Attention Model Visual Question Answering Summary Visual Question Answering VQA problem attracting increasing interest multiple research discipline Solving VQA problem requires technique computer vision understanding visual content presented image video well one natural language processing understanding semantics question generating answer Regarding visual content modeling existing VQA method adopt strategy extracting global feature image video inevitably fails capturing finegrained information spatial configuration multiple object Extracting feature autogenerated region regionbased image recognition method cannot essentially address problem may introduce overwhelming irrelevant feature question work propose novel Focused Dynamic Attention FDA model provide better aligned image content representation proposed question aware key word question FDA employ offtheshelf object detector identify important region fuse information region global feature via LSTM unit questiondriven representation combined question representation fed reasoning unit generating answer Extensive evaluation largescale benchmark dataset VQA clearly demonstrate superior performance FDA wellestablished baseline Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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512
512
['Remi Lebret', 'Pedro O. Pinheiro', 'Ronan Collobert']
1412.8419v3
Generating a novel textual description of an image is an interesting problem that connects computer vision and natural language processing. In this paper, we present a simple model that is able to generate descriptive sentences given a sample image. This model has a strong focus on the syntax of the descriptions. We train a purely bilinear model that learns a metric between an image representation (generated from a previously trained Convolutional Neural Network) and phrases that are used to described them. The system is then able to infer phrases from a given image sample. Based on caption syntax statistics, we propose a simple language model that can produce relevant descriptions for a given test image using the phrases inferred. Our approach, which is considerably simpler than state-of-the-art models, achieves comparable results on the recently release Microsoft COCO dataset.
Simple Image Description Generator via a Linear Phrase-Based Approach
2,014
http://arxiv.org/pdf/1412.8419v3
Title Simple Image Description Generator via Linear PhraseBased Approach Summary Generating novel textual description image interesting problem connects computer vision natural language processing paper present simple model able generate descriptive sentence given sample image model strong focus syntax description train purely bilinear model learns metric image representation generated previously trained Convolutional Neural Network phrase used described system able infer phrase given image sample Based caption syntax statistic propose simple language model produce relevant description given test image using phrase inferred approach considerably simpler stateoftheart model achieves comparable result recently release Microsoft COCO dataset Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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513
513
['Lin Ma', 'Zhengdong Lu', 'Lifeng Shang', 'Hang Li']
1504.06063v5
In this paper, we propose multimodal convolutional neural networks (m-CNNs) for matching image and sentence. Our m-CNN provides an end-to-end framework with convolutional architectures to exploit image representation, word composition, and the matching relations between the two modalities. More specifically, it consists of one image CNN encoding the image content, and one matching CNN learning the joint representation of image and sentence. The matching CNN composes words to different semantic fragments and learns the inter-modal relations between image and the composed fragments at different levels, thus fully exploit the matching relations between image and sentence. Experimental results on benchmark databases of bidirectional image and sentence retrieval demonstrate that the proposed m-CNNs can effectively capture the information necessary for image and sentence matching. Specifically, our proposed m-CNNs for bidirectional image and sentence retrieval on Flickr30K and Microsoft COCO databases achieve the state-of-the-art performances.
Multimodal Convolutional Neural Networks for Matching Image and Sentence
2,015
http://arxiv.org/pdf/1504.06063v5
Title Multimodal Convolutional Neural Networks Matching Image Sentence Summary paper propose multimodal convolutional neural network mCNNs matching image sentence mCNN provides endtoend framework convolutional architecture exploit image representation word composition matching relation two modality specifically consists one image CNN encoding image content one matching CNN learning joint representation image sentence matching CNN composes word different semantic fragment learns intermodal relation image composed fragment different level thus fully exploit matching relation image sentence Experimental result benchmark database bidirectional image sentence retrieval demonstrate proposed mCNNs effectively capture information necessary image sentence matching Specifically proposed mCNNs bidirectional image sentence retrieval Flickr30K Microsoft COCO database achieve stateoftheart performance Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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514
514
['Jacob Andreas', 'Marcus Rohrbach', 'Trevor Darrell', 'Dan Klein']
1601.01705v4
We describe a question answering model that applies to both images and structured knowledge bases. The model uses natural language strings to automatically assemble neural networks from a collection of composable modules. Parameters for these modules are learned jointly with network-assembly parameters via reinforcement learning, with only (world, question, answer) triples as supervision. Our approach, which we term a dynamic neural model network, achieves state-of-the-art results on benchmark datasets in both visual and structured domains.
Learning to Compose Neural Networks for Question Answering
2,016
http://arxiv.org/pdf/1601.01705v4
Title Learning Compose Neural Networks Question Answering Summary describe question answering model applies image structured knowledge base model us natural language string automatically assemble neural network collection composable module Parameters module learned jointly networkassembly parameter via reinforcement learning world question answer triple supervision approach term dynamic neural model network achieves stateoftheart result benchmark datasets visual structured domain Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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515
515
['Taehwan Kim', 'Weiran Wang', 'Hao Tang', 'Karen Livescu']
1602.04278v1
We study the problem of recognition of fingerspelled letter sequences in American Sign Language in a signer-independent setting. Fingerspelled sequences are both challenging and important to recognize, as they are used for many content words such as proper nouns and technical terms. Previous work has shown that it is possible to achieve almost 90% accuracies on fingerspelling recognition in a signer-dependent setting. However, the more realistic signer-independent setting presents challenges due to significant variations among signers, coupled with the dearth of available training data. We investigate this problem with approaches inspired by automatic speech recognition. We start with the best-performing approaches from prior work, based on tandem models and segmental conditional random fields (SCRFs), with features based on deep neural network (DNN) classifiers of letters and phonological features. Using DNN adaptation, we find that it is possible to bridge a large part of the gap between signer-dependent and signer-independent performance. Using only about 115 transcribed words for adaptation from the target signer, we obtain letter accuracies of up to 82.7% with frame-level adaptation labels and 69.7% with only word labels.
Signer-independent Fingerspelling Recognition with Deep Neural Network Adaptation
2,016
http://arxiv.org/pdf/1602.04278v1
Title Signerindependent Fingerspelling Recognition Deep Neural Network Adaptation Summary study problem recognition fingerspelled letter sequence American Sign Language signerindependent setting Fingerspelled sequence challenging important recognize used many content word proper noun technical term Previous work shown possible achieve almost 90 accuracy fingerspelling recognition signerdependent setting However realistic signerindependent setting present challenge due significant variation among signer coupled dearth available training data investigate problem approach inspired automatic speech recognition start bestperforming approach prior work based tandem model segmental conditional random field SCRFs feature based deep neural network DNN classifier letter phonological feature Using DNN adaptation find possible bridge large part gap signerdependent signerindependent performance Using 115 transcribed word adaptation target signer obtain letter accuracy 827 framelevel adaptation label 697 word label Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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516
516
['Armand Vilalta', 'Dario Garcia-Gasulla', 'Ferran Parés', 'Eduard Ayguadé', 'Jesus Labarta', 'Ulises Cortés', 'Toyotaro Suzumura']
1707.09872v2
The current state-of-the-art for image annotation and image retrieval tasks is obtained through deep neural networks, which combine an image representation and a text representation into a shared embedding space. In this paper we evaluate the impact of using the Full-Network embedding in this setting, replacing the original image representation in a competitive multimodal embedding generation scheme. Unlike the one-layer image embeddings typically used by most approaches, the Full-Network embedding provides a multi-scale representation of images, which results in richer characterizations. To measure the influence of the Full-Network embedding, we evaluate its performance on three different datasets, and compare the results with the original multimodal embedding generation scheme when using a one-layer image embedding, and with the rest of the state-of-the-art. Results for image annotation and image retrieval tasks indicate that the Full-Network embedding is consistently superior to the one-layer embedding. These results motivate the integration of the Full-Network embedding on any multimodal embedding generation scheme, something feasible thanks to the flexibility of the approach.
Full-Network Embedding in a Multimodal Embedding Pipeline
2,017
http://arxiv.org/pdf/1707.09872v2
Title FullNetwork Embedding Multimodal Embedding Pipeline Summary current stateoftheart image annotation image retrieval task obtained deep neural network combine image representation text representation shared embedding space paper evaluate impact using FullNetwork embedding setting replacing original image representation competitive multimodal embedding generation scheme Unlike onelayer image embeddings typically used approach FullNetwork embedding provides multiscale representation image result richer characterization measure influence FullNetwork embedding evaluate performance three different datasets compare result original multimodal embedding generation scheme using onelayer image embedding rest stateoftheart Results image annotation image retrieval task indicate FullNetwork embedding consistently superior onelayer embedding result motivate integration FullNetwork embedding multimodal embedding generation scheme something feasible thanks flexibility approach Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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517
517
['Marc Tanti', 'Albert Gatt', 'Kenneth P. Camilleri']
1708.02043v2
In neural image captioning systems, a recurrent neural network (RNN) is typically viewed as the primary `generation' component. This view suggests that the image features should be `injected' into the RNN. This is in fact the dominant view in the literature. Alternatively, the RNN can instead be viewed as only encoding the previously generated words. This view suggests that the RNN should only be used to encode linguistic features and that only the final representation should be `merged' with the image features at a later stage. This paper compares these two architectures. We find that, in general, late merging outperforms injection, suggesting that RNNs are better viewed as encoders, rather than generators.
What is the Role of Recurrent Neural Networks (RNNs) in an Image Caption Generator?
2,017
http://arxiv.org/pdf/1708.02043v2
Title Role Recurrent Neural Networks RNNs Image Caption Generator Summary neural image captioning system recurrent neural network RNN typically viewed primary generation component view suggests image feature injected RNN fact dominant view literature Alternatively RNN instead viewed encoding previously generated word view suggests RNN used encode linguistic feature final representation merged image feature later stage paper compare two architecture find general late merging outperforms injection suggesting RNNs better viewed encoders rather generator Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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518
518
['Shiliang Zhang', 'Hui Jiang', 'Mingbin Xu', 'Junfeng Hou', 'Lirong Dai']
1505.01504v2
In this paper, we propose the new fixed-size ordinally-forgetting encoding (FOFE) method, which can almost uniquely encode any variable-length sequence of words into a fixed-size representation. FOFE can model the word order in a sequence using a simple ordinally-forgetting mechanism according to the positions of words. In this work, we have applied FOFE to feedforward neural network language models (FNN-LMs). Experimental results have shown that without using any recurrent feedbacks, FOFE based FNN-LMs can significantly outperform not only the standard fixed-input FNN-LMs but also the popular RNN-LMs.
A Fixed-Size Encoding Method for Variable-Length Sequences with its Application to Neural Network Language Models
2,015
http://arxiv.org/pdf/1505.01504v2
Title FixedSize Encoding Method VariableLength Sequences Application Neural Network Language Models Summary paper propose new fixedsize ordinallyforgetting encoding FOFE method almost uniquely encode variablelength sequence word fixedsize representation FOFE model word order sequence using simple ordinallyforgetting mechanism according position word work applied FOFE feedforward neural network language model FNNLMs Experimental result shown without using recurrent feedback FOFE based FNNLMs significantly outperform standard fixedinput FNNLMs also popular RNNLMs Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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519
519
['Chris Dyer', 'Miguel Ballesteros', 'Wang Ling', 'Austin Matthews', 'Noah A. Smith']
1505.08075v1
We propose a technique for learning representations of parser states in transition-based dependency parsers. Our primary innovation is a new control structure for sequence-to-sequence neural networks---the stack LSTM. Like the conventional stack data structures used in transition-based parsing, elements can be pushed to or popped from the top of the stack in constant time, but, in addition, an LSTM maintains a continuous space embedding of the stack contents. This lets us formulate an efficient parsing model that captures three facets of a parser's state: (i) unbounded look-ahead into the buffer of incoming words, (ii) the complete history of actions taken by the parser, and (iii) the complete contents of the stack of partially built tree fragments, including their internal structures. Standard backpropagation techniques are used for training and yield state-of-the-art parsing performance.
Transition-Based Dependency Parsing with Stack Long Short-Term Memory
2,015
http://arxiv.org/pdf/1505.08075v1
Title TransitionBased Dependency Parsing Stack Long ShortTerm Memory Summary propose technique learning representation parser state transitionbased dependency parser primary innovation new control structure sequencetosequence neural networksthe stack LSTM Like conventional stack data structure used transitionbased parsing element pushed popped top stack constant time addition LSTM maintains continuous space embedding stack content let u formulate efficient parsing model capture three facet parser state unbounded lookahead buffer incoming word ii complete history action taken parser iii complete content stack partially built tree fragment including internal structure Standard backpropagation technique used training yield stateoftheart parsing performance Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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520
520
['Ehud Ben-Reuven', 'Jacob Goldberger']
1604.00317v1
In this study we address the problem of training a neuralnetwork for language identification using both labeled and unlabeled speech samples in the form of i-vectors. We propose a neural network architecture that can also handle out-of-set languages. We utilize a modified version of the recently proposed Ladder Network semisupervised training procedure that optimizes the reconstruction costs of a stack of denoising autoencoders. We show that this approach can be successfully applied to the case where the training dataset is composed of both labeled and unlabeled acoustic data. The results show enhanced language identification on the NIST 2015 language identification dataset.
A Semisupervised Approach for Language Identification based on Ladder Networks
2,016
http://arxiv.org/pdf/1604.00317v1
Title Semisupervised Approach Language Identification based Ladder Networks Summary study address problem training neuralnetwork language identification using labeled unlabeled speech sample form ivectors propose neural network architecture also handle outofset language utilize modified version recently proposed Ladder Network semisupervised training procedure optimizes reconstruction cost stack denoising autoencoders show approach successfully applied case training dataset composed labeled unlabeled acoustic data result show enhanced language identification NIST 2015 language identification dataset Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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521
521
['Awni Y. Hannun', 'Andrew L. Maas', 'Daniel Jurafsky', 'Andrew Y. Ng']
1408.2873v2
We present a method to perform first-pass large vocabulary continuous speech recognition using only a neural network and language model. Deep neural network acoustic models are now commonplace in HMM-based speech recognition systems, but building such systems is a complex, domain-specific task. Recent work demonstrated the feasibility of discarding the HMM sequence modeling framework by directly predicting transcript text from audio. This paper extends this approach in two ways. First, we demonstrate that a straightforward recurrent neural network architecture can achieve a high level of accuracy. Second, we propose and evaluate a modified prefix-search decoding algorithm. This approach to decoding enables first-pass speech recognition with a language model, completely unaided by the cumbersome infrastructure of HMM-based systems. Experiments on the Wall Street Journal corpus demonstrate fairly competitive word error rates, and the importance of bi-directional network recurrence.
First-Pass Large Vocabulary Continuous Speech Recognition using Bi-Directional Recurrent DNNs
2,014
http://arxiv.org/pdf/1408.2873v2
Title FirstPass Large Vocabulary Continuous Speech Recognition using BiDirectional Recurrent DNNs Summary present method perform firstpass large vocabulary continuous speech recognition using neural network language model Deep neural network acoustic model commonplace HMMbased speech recognition system building system complex domainspecific task Recent work demonstrated feasibility discarding HMM sequence modeling framework directly predicting transcript text audio paper extends approach two way First demonstrate straightforward recurrent neural network architecture achieve high level accuracy Second propose evaluate modified prefixsearch decoding algorithm approach decoding enables firstpass speech recognition language model completely unaided cumbersome infrastructure HMMbased system Experiments Wall Street Journal corpus demonstrate fairly competitive word error rate importance bidirectional network recurrence Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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522
522
['Jose Antonio Miñarro-Giménez', 'Oscar Marín-Alonso', 'Matthias Samwald']
1502.03682v1
BACKGROUND: The amount of biomedical literature is rapidly growing and it is becoming increasingly difficult to keep manually curated knowledge bases and ontologies up-to-date. In this study we applied the word2vec deep learning toolkit to medical corpora to test its potential for identifying relationships from unstructured text. We evaluated the efficiency of word2vec in identifying properties of pharmaceuticals based on mid-sized, unstructured medical text corpora available on the web. Properties included relationships to diseases ('may treat') or physiological processes ('has physiological effect'). We compared the relationships identified by word2vec with manually curated information from the National Drug File - Reference Terminology (NDF-RT) ontology as a gold standard. RESULTS: Our results revealed a maximum accuracy of 49.28% which suggests a limited ability of word2vec to capture linguistic regularities on the collected medical corpora compared with other published results. We were able to document the influence of different parameter settings on result accuracy and found and unexpected trade-off between ranking quality and accuracy. Pre-processing corpora to reduce syntactic variability proved to be a good strategy for increasing the utility of the trained vector models. CONCLUSIONS: Word2vec is a very efficient implementation for computing vector representations and for its ability to identify relationships in textual data without any prior domain knowledge. We found that the ranking and retrieved results generated by word2vec were not of sufficient quality for automatic population of knowledge bases and ontologies, but could serve as a starting point for further manual curation.
Applying deep learning techniques on medical corpora from the World Wide Web: a prototypical system and evaluation
2,015
http://arxiv.org/pdf/1502.03682v1
Title Applying deep learning technique medical corpus World Wide Web prototypical system evaluation Summary BACKGROUND amount biomedical literature rapidly growing becoming increasingly difficult keep manually curated knowledge base ontology uptodate study applied word2vec deep learning toolkit medical corpus test potential identifying relationship unstructured text evaluated efficiency word2vec identifying property pharmaceutical based midsized unstructured medical text corpus available web Properties included relationship disease may treat physiological process physiological effect compared relationship identified word2vec manually curated information National Drug File Reference Terminology NDFRT ontology gold standard RESULTS result revealed maximum accuracy 4928 suggests limited ability word2vec capture linguistic regularity collected medical corpus compared published result able document influence different parameter setting result accuracy found unexpected tradeoff ranking quality accuracy Preprocessing corpus reduce syntactic variability proved good strategy increasing utility trained vector model CONCLUSIONS Word2vec efficient implementation computing vector representation ability identify relationship textual data without prior domain knowledge found ranking retrieved result generated word2vec sufficient quality automatic population knowledge base ontology could serve starting point manual curation Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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523
523
['Mingxuan Wang', 'Zhengdong Lu', 'Hang Li', 'Qun Liu']
1503.02427v6
Many tasks in natural language processing, ranging from machine translation to question answering, can be reduced to the problem of matching two sentences or more generally two short texts. We propose a new approach to the problem, called Deep Match Tree (DeepMatch$_{tree}$), under a general setting. The approach consists of two components, 1) a mining algorithm to discover patterns for matching two short-texts, defined in the product space of dependency trees, and 2) a deep neural network for matching short texts using the mined patterns, as well as a learning algorithm to build the network having a sparse structure. We test our algorithm on the problem of matching a tweet and a response in social media, a hard matching problem proposed in [Wang et al., 2013], and show that DeepMatch$_{tree}$ can outperform a number of competitor models including one without using dependency trees and one based on word-embedding, all with large margins
Syntax-based Deep Matching of Short Texts
2,015
http://arxiv.org/pdf/1503.02427v6
Title Syntaxbased Deep Matching Short Texts Summary Many task natural language processing ranging machine translation question answering reduced problem matching two sentence generally two short text propose new approach problem called Deep Match Tree DeepMatchtree general setting approach consists two component 1 mining algorithm discover pattern matching two shorttexts defined product space dependency tree 2 deep neural network matching short text using mined pattern well learning algorithm build network sparse structure test algorithm problem matching tweet response social medium hard matching problem proposed Wang et al 2013 show DeepMatchtree outperform number competitor model including one without using dependency tree one based wordembedding large margin Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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524
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['Grégoire Mesnil', 'Tomas Mikolov', "Marc'Aurelio Ranzato", 'Yoshua Bengio']
1412.5335v7
Sentiment analysis is a common task in natural language processing that aims to detect polarity of a text document (typically a consumer review). In the simplest settings, we discriminate only between positive and negative sentiment, turning the task into a standard binary classification problem. We compare several ma- chine learning approaches to this problem, and combine them to achieve the best possible results. We show how to use for this task the standard generative lan- guage models, which are slightly complementary to the state of the art techniques. We achieve strong results on a well-known dataset of IMDB movie reviews. Our results are easily reproducible, as we publish also the code needed to repeat the experiments. This should simplify further advance of the state of the art, as other researchers can combine their techniques with ours with little effort.
Ensemble of Generative and Discriminative Techniques for Sentiment Analysis of Movie Reviews
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http://arxiv.org/pdf/1412.5335v7
Title Ensemble Generative Discriminative Techniques Sentiment Analysis Movie Reviews Summary Sentiment analysis common task natural language processing aim detect polarity text document typically consumer review simplest setting discriminate positive negative sentiment turning task standard binary classification problem compare several chine learning approach problem combine achieve best possible result show use task standard generative lan guage model slightly complementary state art technique achieve strong result wellknown dataset IMDB movie review result easily reproducible publish also code needed repeat experiment simplify advance state art researcher combine technique little effort Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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525
525
['Kartik Audhkhasi', 'Abhinav Sethy', 'Bhuvana Ramabhadran']
1412.7063v5
We propose Diverse Embedding Neural Network (DENN), a novel architecture for language models (LMs). A DENNLM projects the input word history vector onto multiple diverse low-dimensional sub-spaces instead of a single higher-dimensional sub-space as in conventional feed-forward neural network LMs. We encourage these sub-spaces to be diverse during network training through an augmented loss function. Our language modeling experiments on the Penn Treebank data set show the performance benefit of using a DENNLM.
Diverse Embedding Neural Network Language Models
2,014
http://arxiv.org/pdf/1412.7063v5
Title Diverse Embedding Neural Network Language Models Summary propose Diverse Embedding Neural Network DENN novel architecture language model LMs DENNLM project input word history vector onto multiple diverse lowdimensional subspace instead single higherdimensional subspace conventional feedforward neural network LMs encourage subspace diverse network training augmented loss function language modeling experiment Penn Treebank data set show performance benefit using DENNLM Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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526
526
['Dimitri Palaz', 'Mathew Magimai Doss', 'Ronan Collobert']
1412.7110v6
Automatic speech recognition systems usually rely on spectral-based features, such as MFCC of PLP. These features are extracted based on prior knowledge such as, speech perception or/and speech production. Recently, convolutional neural networks have been shown to be able to estimate phoneme conditional probabilities in a completely data-driven manner, i.e. using directly temporal raw speech signal as input. This system was shown to yield similar or better performance than HMM/ANN based system on phoneme recognition task and on large scale continuous speech recognition task, using less parameters. Motivated by these studies, we investigate the use of simple linear classifier in the CNN-based framework. Thus, the network learns linearly separable features from raw speech. We show that such system yields similar or better performance than MLP based system using cepstral-based features as input.
Learning linearly separable features for speech recognition using convolutional neural networks
2,014
http://arxiv.org/pdf/1412.7110v6
Title Learning linearly separable feature speech recognition using convolutional neural network Summary Automatic speech recognition system usually rely spectralbased feature MFCC PLP feature extracted based prior knowledge speech perception orand speech production Recently convolutional neural network shown able estimate phoneme conditional probability completely datadriven manner ie using directly temporal raw speech signal input system shown yield similar better performance HMMANN based system phoneme recognition task large scale continuous speech recognition task using le parameter Motivated study investigate use simple linear classifier CNNbased framework Thus network learns linearly separable feature raw speech show system yield similar better performance MLP based system using cepstralbased feature input Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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527
527
['Edward Grefenstette', 'Karl Moritz Hermann', 'Mustafa Suleyman', 'Phil Blunsom']
1506.02516v3
Recently, strong results have been demonstrated by Deep Recurrent Neural Networks on natural language transduction problems. In this paper we explore the representational power of these models using synthetic grammars designed to exhibit phenomena similar to those found in real transduction problems such as machine translation. These experiments lead us to propose new memory-based recurrent networks that implement continuously differentiable analogues of traditional data structures such as Stacks, Queues, and DeQues. We show that these architectures exhibit superior generalisation performance to Deep RNNs and are often able to learn the underlying generating algorithms in our transduction experiments.
Learning to Transduce with Unbounded Memory
2,015
http://arxiv.org/pdf/1506.02516v3
Title Learning Transduce Unbounded Memory Summary Recently strong result demonstrated Deep Recurrent Neural Networks natural language transduction problem paper explore representational power model using synthetic grammar designed exhibit phenomenon similar found real transduction problem machine translation experiment lead u propose new memorybased recurrent network implement continuously differentiable analogue traditional data structure Stacks Queues DeQues show architecture exhibit superior generalisation performance Deep RNNs often able learn underlying generating algorithm transduction experiment Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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528
528
['ShiLiang Zhang', 'Hui Jiang', 'Si Wei', 'LiRong Dai']
1510.02693v1
We introduce a new structure for memory neural networks, called feedforward sequential memory networks (FSMN), which can learn long-term dependency without using recurrent feedback. The proposed FSMN is a standard feedforward neural networks equipped with learnable sequential memory blocks in the hidden layers. In this work, we have applied FSMN to several language modeling (LM) tasks. Experimental results have shown that the memory blocks in FSMN can learn effective representations of long history. Experiments have shown that FSMN based language models can significantly outperform not only feedforward neural network (FNN) based LMs but also the popular recurrent neural network (RNN) LMs.
Feedforward Sequential Memory Neural Networks without Recurrent Feedback
2,015
http://arxiv.org/pdf/1510.02693v1
Title Feedforward Sequential Memory Neural Networks without Recurrent Feedback Summary introduce new structure memory neural network called feedforward sequential memory network FSMN learn longterm dependency without using recurrent feedback proposed FSMN standard feedforward neural network equipped learnable sequential memory block hidden layer work applied FSMN several language modeling LM task Experimental result shown memory block FSMN learn effective representation long history Experiments shown FSMN based language model significantly outperform feedforward neural network FNN based LMs also popular recurrent neural network RNN LMs Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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529
529
['Yi-Hsiu Liao', 'Hung-yi Lee', 'Lin-shan Lee']
1511.02506v1
In this paper we propose the Structured Deep Neural Network (structured DNN) as a structured and deep learning framework. This approach can learn to find the best structured object (such as a label sequence) given a structured input (such as a vector sequence) by globally considering the mapping relationships between the structures rather than item by item. When automatic speech recognition is viewed as a special case of such a structured learning problem, where we have the acoustic vector sequence as the input and the phoneme label sequence as the output, it becomes possible to comprehensively learn utterance by utterance as a whole, rather than frame by frame. Structured Support Vector Machine (structured SVM) was proposed to perform ASR with structured learning previously, but limited by the linear nature of SVM. Here we propose structured DNN to use nonlinear transformations in multi-layers as a structured and deep learning approach. This approach was shown to beat structured SVM in preliminary experiments on TIMIT.
Towards Structured Deep Neural Network for Automatic Speech Recognition
2,015
http://arxiv.org/pdf/1511.02506v1
Title Towards Structured Deep Neural Network Automatic Speech Recognition Summary paper propose Structured Deep Neural Network structured DNN structured deep learning framework approach learn find best structured object label sequence given structured input vector sequence globally considering mapping relationship structure rather item item automatic speech recognition viewed special case structured learning problem acoustic vector sequence input phoneme label sequence output becomes possible comprehensively learn utterance utterance whole rather frame frame Structured Support Vector Machine structured SVM proposed perform ASR structured learning previously limited linear nature SVM propose structured DNN use nonlinear transformation multilayers structured deep learning approach approach shown beat structured SVM preliminary experiment TIMIT Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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530
530
['Kyuyeon Hwang', 'Wonyong Sung']
1601.06581v2
In real-time speech recognition applications, the latency is an important issue. We have developed a character-level incremental speech recognition (ISR) system that responds quickly even during the speech, where the hypotheses are gradually improved while the speaking proceeds. The algorithm employs a speech-to-character unidirectional recurrent neural network (RNN), which is end-to-end trained with connectionist temporal classification (CTC), and an RNN-based character-level language model (LM). The output values of the CTC-trained RNN are character-level probabilities, which are processed by beam search decoding. The RNN LM augments the decoding by providing long-term dependency information. We propose tree-based online beam search with additional depth-pruning, which enables the system to process infinitely long input speech with low latency. This system not only responds quickly on speech but also can dictate out-of-vocabulary (OOV) words according to pronunciation. The proposed model achieves the word error rate (WER) of 8.90% on the Wall Street Journal (WSJ) Nov'92 20K evaluation set when trained on the WSJ SI-284 training set.
Character-Level Incremental Speech Recognition with Recurrent Neural Networks
2,016
http://arxiv.org/pdf/1601.06581v2
Title CharacterLevel Incremental Speech Recognition Recurrent Neural Networks Summary realtime speech recognition application latency important issue developed characterlevel incremental speech recognition ISR system responds quickly even speech hypothesis gradually improved speaking proceeds algorithm employ speechtocharacter unidirectional recurrent neural network RNN endtoend trained connectionist temporal classification CTC RNNbased characterlevel language model LM output value CTCtrained RNN characterlevel probability processed beam search decoding RNN LM augments decoding providing longterm dependency information propose treebased online beam search additional depthpruning enables system process infinitely long input speech low latency system responds quickly speech also dictate outofvocabulary OOV word according pronunciation proposed model achieves word error rate WER 890 Wall Street Journal WSJ Nov92 20K evaluation set trained WSJ SI284 training set Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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531
531
['Daniel Andor', 'Chris Alberti', 'David Weiss', 'Aliaksei Severyn', 'Alessandro Presta', 'Kuzman Ganchev', 'Slav Petrov', 'Michael Collins']
1603.06042v2
We introduce a globally normalized transition-based neural network model that achieves state-of-the-art part-of-speech tagging, dependency parsing and sentence compression results. Our model is a simple feed-forward neural network that operates on a task-specific transition system, yet achieves comparable or better accuracies than recurrent models. We discuss the importance of global as opposed to local normalization: a key insight is that the label bias problem implies that globally normalized models can be strictly more expressive than locally normalized models.
Globally Normalized Transition-Based Neural Networks
2,016
http://arxiv.org/pdf/1603.06042v2
Title Globally Normalized TransitionBased Neural Networks Summary introduce globally normalized transitionbased neural network model achieves stateoftheart partofspeech tagging dependency parsing sentence compression result model simple feedforward neural network operates taskspecific transition system yet achieves comparable better accuracy recurrent model discus importance global opposed local normalization key insight label bias problem implies globally normalized model strictly expressive locally normalized model Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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532
532
['Peng Li', 'Heng Huang']
1603.09381v1
We report an implementation of a clinical information extraction tool that leverages deep neural network to annotate event spans and their attributes from raw clinical notes and pathology reports. Our approach uses context words and their part-of-speech tags and shape information as features. Then we hire temporal (1D) convolutional neural network to learn hidden feature representations. Finally, we use Multilayer Perceptron (MLP) to predict event spans. The empirical evaluation demonstrates that our approach significantly outperforms baselines.
Clinical Information Extraction via Convolutional Neural Network
2,016
http://arxiv.org/pdf/1603.09381v1
Title Clinical Information Extraction via Convolutional Neural Network Summary report implementation clinical information extraction tool leverage deep neural network annotate event span attribute raw clinical note pathology report approach us context word partofspeech tag shape information feature hire temporal 1D convolutional neural network learn hidden feature representation Finally use Multilayer Perceptron MLP predict event span empirical evaluation demonstrates approach significantly outperforms baseline Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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533
533
['David Krueger', 'Tegan Maharaj', 'János Kramár', 'Mohammad Pezeshki', 'Nicolas Ballas', 'Nan Rosemary Ke', 'Anirudh Goyal', 'Yoshua Bengio', 'Aaron Courville', 'Chris Pal']
1606.01305v4
We propose zoneout, a novel method for regularizing RNNs. At each timestep, zoneout stochastically forces some hidden units to maintain their previous values. Like dropout, zoneout uses random noise to train a pseudo-ensemble, improving generalization. But by preserving instead of dropping hidden units, gradient information and state information are more readily propagated through time, as in feedforward stochastic depth networks. We perform an empirical investigation of various RNN regularizers, and find that zoneout gives significant performance improvements across tasks. We achieve competitive results with relatively simple models in character- and word-level language modelling on the Penn Treebank and Text8 datasets, and combining with recurrent batch normalization yields state-of-the-art results on permuted sequential MNIST.
Zoneout: Regularizing RNNs by Randomly Preserving Hidden Activations
2,016
http://arxiv.org/pdf/1606.01305v4
Title Zoneout Regularizing RNNs Randomly Preserving Hidden Activations Summary propose zoneout novel method regularizing RNNs timestep zoneout stochastically force hidden unit maintain previous value Like dropout zoneout us random noise train pseudoensemble improving generalization preserving instead dropping hidden unit gradient information state information readily propagated time feedforward stochastic depth network perform empirical investigation various RNN regularizers find zoneout give significant performance improvement across task achieve competitive result relatively simple model character wordlevel language modelling Penn Treebank Text8 datasets combining recurrent batch normalization yield stateoftheart result permuted sequential MNIST Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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534
534
['Isabelle Augenstein', 'Tim Rocktäschel', 'Andreas Vlachos', 'Kalina Bontcheva']
1606.05464v2
Stance detection is the task of classifying the attitude expressed in a text towards a target such as Hillary Clinton to be "positive", negative" or "neutral". Previous work has assumed that either the target is mentioned in the text or that training data for every target is given. This paper considers the more challenging version of this task, where targets are not always mentioned and no training data is available for the test targets. We experiment with conditional LSTM encoding, which builds a representation of the tweet that is dependent on the target, and demonstrate that it outperforms encoding the tweet and the target independently. Performance is improved further when the conditional model is augmented with bidirectional encoding. We evaluate our approach on the SemEval 2016 Task 6 Twitter Stance Detection corpus achieving performance second best only to a system trained on semi-automatically labelled tweets for the test target. When such weak supervision is added, our approach achieves state-of-the-art results.
Stance Detection with Bidirectional Conditional Encoding
2,016
http://arxiv.org/pdf/1606.05464v2
Title Stance Detection Bidirectional Conditional Encoding Summary Stance detection task classifying attitude expressed text towards target Hillary Clinton positive negative neutral Previous work assumed either target mentioned text training data every target given paper considers challenging version task target always mentioned training data available test target experiment conditional LSTM encoding build representation tweet dependent target demonstrate outperforms encoding tweet target independently Performance improved conditional model augmented bidirectional encoding evaluate approach SemEval 2016 Task 6 Twitter Stance Detection corpus achieving performance second best system trained semiautomatically labelled tweet test target weak supervision added approach achieves stateoftheart result Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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535
535
['Noura Al Moubayed', 'Toby Breckon', 'Peter Matthews', 'A. Stephen McGough']
1606.05554v1
In This paper we present a novel approach to spam filtering and demonstrate its applicability with respect to SMS messages. Our approach requires minimum features engineering and a small set of la- belled data samples. Features are extracted using topic modelling based on latent Dirichlet allocation, and then a comprehensive data model is created using a Stacked Denoising Autoencoder (SDA). Topic modelling summarises the data providing ease of use and high interpretability by visualising the topics using word clouds. Given that the SMS messages can be regarded as either spam (unwanted) or ham (wanted), the SDA is able to model the messages and accurately discriminate between the two classes without the need for a pre-labelled training set. The results are compared against the state-of-the-art spam detection algorithms with our proposed approach achieving over 97% accuracy which compares favourably to the best reported algorithms presented in the literature.
SMS Spam Filtering using Probabilistic Topic Modelling and Stacked Denoising Autoencoder
2,016
http://arxiv.org/pdf/1606.05554v1
Title SMS Spam Filtering using Probabilistic Topic Modelling Stacked Denoising Autoencoder Summary paper present novel approach spam filtering demonstrate applicability respect SMS message approach requires minimum feature engineering small set la belled data sample Features extracted using topic modelling based latent Dirichlet allocation comprehensive data model created using Stacked Denoising Autoencoder SDA Topic modelling summarises data providing ease use high interpretability visualising topic using word cloud Given SMS message regarded either spam unwanted ham wanted SDA able model message accurately discriminate two class without need prelabelled training set result compared stateoftheart spam detection algorithm proposed approach achieving 97 accuracy compare favourably best reported algorithm presented literature Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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536
536
['Abhyuday Jagannatha', 'Hong Yu']
1606.07953v2
Sequence labeling for extraction of medical events and their attributes from unstructured text in Electronic Health Record (EHR) notes is a key step towards semantic understanding of EHRs. It has important applications in health informatics including pharmacovigilance and drug surveillance. The state of the art supervised machine learning models in this domain are based on Conditional Random Fields (CRFs) with features calculated from fixed context windows. In this application, we explored various recurrent neural network frameworks and show that they significantly outperformed the CRF models.
Bidirectional Recurrent Neural Networks for Medical Event Detection in Electronic Health Records
2,016
http://arxiv.org/pdf/1606.07953v2
Title Bidirectional Recurrent Neural Networks Medical Event Detection Electronic Health Records Summary Sequence labeling extraction medical event attribute unstructured text Electronic Health Record EHR note key step towards semantic understanding EHRs important application health informatics including pharmacovigilance drug surveillance state art supervised machine learning model domain based Conditional Random Fields CRFs feature calculated fixed context window application explored various recurrent neural network framework show significantly outperformed CRF model Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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537
537
['Liang Lu']
1607.01963v5
Highway deep neural network (HDNN) is a type of depth-gated feedforward neural network, which has shown to be easier to train with more hidden layers and also generalise better compared to conventional plain deep neural networks (DNNs). Previously, we investigated a structured HDNN architecture for speech recognition, in which the two gate functions were tied across all the hidden layers, and we were able to train a much smaller model without sacrificing the recognition accuracy. In this paper, we carry on the study of this architecture with sequence-discriminative training criterion and speaker adaptation techniques on the AMI meeting speech recognition corpus. We show that these two techniques improve speech recognition accuracy on top of the model trained with the cross entropy criterion. Furthermore, we demonstrate that the two gate functions that are tied across all the hidden layers are able to control the information flow over the whole network, and we can achieve considerable improvements by only updating these gate functions in both sequence training and adaptation experiments.
Sequence Training and Adaptation of Highway Deep Neural Networks
2,016
http://arxiv.org/pdf/1607.01963v5
Title Sequence Training Adaptation Highway Deep Neural Networks Summary Highway deep neural network HDNN type depthgated feedforward neural network shown easier train hidden layer also generalise better compared conventional plain deep neural network DNNs Previously investigated structured HDNN architecture speech recognition two gate function tied across hidden layer able train much smaller model without sacrificing recognition accuracy paper carry study architecture sequencediscriminative training criterion speaker adaptation technique AMI meeting speech recognition corpus show two technique improve speech recognition accuracy top model trained cross entropy criterion Furthermore demonstrate two gate function tied across hidden layer able control information flow whole network achieve considerable improvement updating gate function sequence training adaptation experiment Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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538
538
['Julian Georg Zilly', 'Rupesh Kumar Srivastava', 'Jan Koutník', 'Jürgen Schmidhuber']
1607.03474v5
Many sequential processing tasks require complex nonlinear transition functions from one step to the next. However, recurrent neural networks with 'deep' transition functions remain difficult to train, even when using Long Short-Term Memory (LSTM) networks. We introduce a novel theoretical analysis of recurrent networks based on Gersgorin's circle theorem that illuminates several modeling and optimization issues and improves our understanding of the LSTM cell. Based on this analysis we propose Recurrent Highway Networks, which extend the LSTM architecture to allow step-to-step transition depths larger than one. Several language modeling experiments demonstrate that the proposed architecture results in powerful and efficient models. On the Penn Treebank corpus, solely increasing the transition depth from 1 to 10 improves word-level perplexity from 90.6 to 65.4 using the same number of parameters. On the larger Wikipedia datasets for character prediction (text8 and enwik8), RHNs outperform all previous results and achieve an entropy of 1.27 bits per character.
Recurrent Highway Networks
2,016
http://arxiv.org/pdf/1607.03474v5
Title Recurrent Highway Networks Summary Many sequential processing task require complex nonlinear transition function one step next However recurrent neural network deep transition function remain difficult train even using Long ShortTerm Memory LSTM network introduce novel theoretical analysis recurrent network based Gersgorins circle theorem illuminates several modeling optimization issue improves understanding LSTM cell Based analysis propose Recurrent Highway Networks extend LSTM architecture allow steptostep transition depth larger one Several language modeling experiment demonstrate proposed architecture result powerful efficient model Penn Treebank corpus solely increasing transition depth 1 10 improves wordlevel perplexity 906 654 using number parameter larger Wikipedia datasets character prediction text8 enwik8 RHNs outperform previous result achieve entropy 127 bit per character Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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539
539
['Antonio Valerio Miceli Barone']
1608.02996v1
Current approaches to learning vector representations of text that are compatible between different languages usually require some amount of parallel text, aligned at word, sentence or at least document level. We hypothesize however, that different natural languages share enough semantic structure that it should be possible, in principle, to learn compatible vector representations just by analyzing the monolingual distribution of words. In order to evaluate this hypothesis, we propose a scheme to map word vectors trained on a source language to vectors semantically compatible with word vectors trained on a target language using an adversarial autoencoder. We present preliminary qualitative results and discuss possible future developments of this technique, such as applications to cross-lingual sentence representations.
Towards cross-lingual distributed representations without parallel text trained with adversarial autoencoders
2,016
http://arxiv.org/pdf/1608.02996v1
Title Towards crosslingual distributed representation without parallel text trained adversarial autoencoders Summary Current approach learning vector representation text compatible different language usually require amount parallel text aligned word sentence least document level hypothesize however different natural language share enough semantic structure possible principle learn compatible vector representation analyzing monolingual distribution word order evaluate hypothesis propose scheme map word vector trained source language vector semantically compatible word vector trained target language using adversarial autoencoder present preliminary qualitative result discus possible future development technique application crosslingual sentence representation Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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540
540
['Zhiyuan Tang', 'Ying Shi', 'Dong Wang', 'Yang Feng', 'Shiyue Zhang']
1609.08789v3
Recurrent neural networks (RNNs) have shown clear superiority in sequence modeling, particularly the ones with gated units, such as long short-term memory (LSTM) and gated recurrent unit (GRU). However, the dynamic properties behind the remarkable performance remain unclear in many applications, e.g., automatic speech recognition (ASR). This paper employs visualization techniques to study the behavior of LSTM and GRU when performing speech recognition tasks. Our experiments show some interesting patterns in the gated memory, and some of them have inspired simple yet effective modifications on the network structure. We report two of such modifications: (1) lazy cell update in LSTM, and (2) shortcut connections for residual learning. Both modifications lead to more comprehensible and powerful networks.
Memory Visualization for Gated Recurrent Neural Networks in Speech Recognition
2,016
http://arxiv.org/pdf/1609.08789v3
Title Memory Visualization Gated Recurrent Neural Networks Speech Recognition Summary Recurrent neural network RNNs shown clear superiority sequence modeling particularly one gated unit long shortterm memory LSTM gated recurrent unit GRU However dynamic property behind remarkable performance remain unclear many application eg automatic speech recognition ASR paper employ visualization technique study behavior LSTM GRU performing speech recognition task experiment show interesting pattern gated memory inspired simple yet effective modification network structure report two modification 1 lazy cell update LSTM 2 shortcut connection residual learning modification lead comprehensible powerful network Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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541
541
['Hagen Soltau', 'Hank Liao', 'Hasim Sak']
1610.09975v1
We present results that show it is possible to build a competitive, greatly simplified, large vocabulary continuous speech recognition system with whole words as acoustic units. We model the output vocabulary of about 100,000 words directly using deep bi-directional LSTM RNNs with CTC loss. The model is trained on 125,000 hours of semi-supervised acoustic training data, which enables us to alleviate the data sparsity problem for word models. We show that the CTC word models work very well as an end-to-end all-neural speech recognition model without the use of traditional context-dependent sub-word phone units that require a pronunciation lexicon, and without any language model removing the need to decode. We demonstrate that the CTC word models perform better than a strong, more complex, state-of-the-art baseline with sub-word units.
Neural Speech Recognizer: Acoustic-to-Word LSTM Model for Large Vocabulary Speech Recognition
2,016
http://arxiv.org/pdf/1610.09975v1
Title Neural Speech Recognizer AcoustictoWord LSTM Model Large Vocabulary Speech Recognition Summary present result show possible build competitive greatly simplified large vocabulary continuous speech recognition system whole word acoustic unit model output vocabulary 100000 word directly using deep bidirectional LSTM RNNs CTC loss model trained 125000 hour semisupervised acoustic training data enables u alleviate data sparsity problem word model show CTC word model work well endtoend allneural speech recognition model without use traditional contextdependent subword phone unit require pronunciation lexicon without language model removing need decode demonstrate CTC word model perform better strong complex stateoftheart baseline subword unit Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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542
542
['Prajit Ramachandran', 'Peter J. Liu', 'Quoc V. Le']
1611.02683v2
This work presents a general unsupervised learning method to improve the accuracy of sequence to sequence (seq2seq) models. In our method, the weights of the encoder and decoder of a seq2seq model are initialized with the pretrained weights of two language models and then fine-tuned with labeled data. We apply this method to challenging benchmarks in machine translation and abstractive summarization and find that it significantly improves the subsequent supervised models. Our main result is that pretraining improves the generalization of seq2seq models. We achieve state-of-the art results on the WMT English$\rightarrow$German task, surpassing a range of methods using both phrase-based machine translation and neural machine translation. Our method achieves a significant improvement of 1.3 BLEU from the previous best models on both WMT'14 and WMT'15 English$\rightarrow$German. We also conduct human evaluations on abstractive summarization and find that our method outperforms a purely supervised learning baseline in a statistically significant manner.
Unsupervised Pretraining for Sequence to Sequence Learning
2,016
http://arxiv.org/pdf/1611.02683v2
Title Unsupervised Pretraining Sequence Sequence Learning Summary work present general unsupervised learning method improve accuracy sequence sequence seq2seq model method weight encoder decoder seq2seq model initialized pretrained weight two language model finetuned labeled data apply method challenging benchmark machine translation abstractive summarization find significantly improves subsequent supervised model main result pretraining improves generalization seq2seq model achieve stateofthe art result WMT EnglishrightarrowGerman task surpassing range method using phrasebased machine translation neural machine translation method achieves significant improvement 13 BLEU previous best model WMT14 WMT15 EnglishrightarrowGerman also conduct human evaluation abstractive summarization find method outperforms purely supervised learning baseline statistically significant manner Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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543
543
['Yoon Kim', 'Carl Denton', 'Luong Hoang', 'Alexander M. Rush']
1702.00887v3
Attention networks have proven to be an effective approach for embedding categorical inference within a deep neural network. However, for many tasks we may want to model richer structural dependencies without abandoning end-to-end training. In this work, we experiment with incorporating richer structural distributions, encoded using graphical models, within deep networks. We show that these structured attention networks are simple extensions of the basic attention procedure, and that they allow for extending attention beyond the standard soft-selection approach, such as attending to partial segmentations or to subtrees. We experiment with two different classes of structured attention networks: a linear-chain conditional random field and a graph-based parsing model, and describe how these models can be practically implemented as neural network layers. Experiments show that this approach is effective for incorporating structural biases, and structured attention networks outperform baseline attention models on a variety of synthetic and real tasks: tree transduction, neural machine translation, question answering, and natural language inference. We further find that models trained in this way learn interesting unsupervised hidden representations that generalize simple attention.
Structured Attention Networks
2,017
http://arxiv.org/pdf/1702.00887v3
Title Structured Attention Networks Summary Attention network proven effective approach embedding categorical inference within deep neural network However many task may want model richer structural dependency without abandoning endtoend training work experiment incorporating richer structural distribution encoded using graphical model within deep network show structured attention network simple extension basic attention procedure allow extending attention beyond standard softselection approach attending partial segmentation subtrees experiment two different class structured attention network linearchain conditional random field graphbased parsing model describe model practically implemented neural network layer Experiments show approach effective incorporating structural bias structured attention network outperform baseline attention model variety synthetic real task tree transduction neural machine translation question answering natural language inference find model trained way learn interesting unsupervised hidden representation generalize simple attention Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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544
544
['Hongyu Guo', 'Colin Cherry', 'Jiang Su']
1704.05907v1
We propose a multi-view network for text classification. Our method automatically creates various views of its input text, each taking the form of soft attention weights that distribute the classifier's focus among a set of base features. For a bag-of-words representation, each view focuses on a different subset of the text's words. Aggregating many such views results in a more discriminative and robust representation. Through a novel architecture that both stacks and concatenates views, we produce a network that emphasizes both depth and width, allowing training to converge quickly. Using our multi-view architecture, we establish new state-of-the-art accuracies on two benchmark tasks.
End-to-End Multi-View Networks for Text Classification
2,017
http://arxiv.org/pdf/1704.05907v1
Title EndtoEnd MultiView Networks Text Classification Summary propose multiview network text classification method automatically creates various view input text taking form soft attention weight distribute classifier focus among set base feature bagofwords representation view focus different subset text word Aggregating many view result discriminative robust representation novel architecture stack concatenates view produce network emphasizes depth width allowing training converge quickly Using multiview architecture establish new stateoftheart accuracy two benchmark task Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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545
545
['Kartik Goyal', 'Chris Dyer', 'Taylor Berg-Kirkpatrick']
1704.06970v1
We demonstrate that a continuous relaxation of the argmax operation can be used to create a differentiable approximation to greedy decoding for sequence-to-sequence (seq2seq) models. By incorporating this approximation into the scheduled sampling training procedure (Bengio et al., 2015)--a well-known technique for correcting exposure bias--we introduce a new training objective that is continuous and differentiable everywhere and that can provide informative gradients near points where previous decoding decisions change their value. In addition, by using a related approximation, we demonstrate a similar approach to sampled-based training. Finally, we show that our approach outperforms cross-entropy training and scheduled sampling procedures in two sequence prediction tasks: named entity recognition and machine translation.
Differentiable Scheduled Sampling for Credit Assignment
2,017
http://arxiv.org/pdf/1704.06970v1
Title Differentiable Scheduled Sampling Credit Assignment Summary demonstrate continuous relaxation argmax operation used create differentiable approximation greedy decoding sequencetosequence seq2seq model incorporating approximation scheduled sampling training procedure Bengio et al 2015a wellknown technique correcting exposure biaswe introduce new training objective continuous differentiable everywhere provide informative gradient near point previous decoding decision change value addition using related approximation demonstrate similar approach sampledbased training Finally show approach outperforms crossentropy training scheduled sampling procedure two sequence prediction task named entity recognition machine translation Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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546
546
['Zhiyuan Tang', 'Dong Wang', 'Yixiang Chen', 'Ying Shi', 'Lantian Li']
1705.03152v2
Pure acoustic neural models, particularly the LSTM-RNN model, have shown great potential in language identification (LID). However, the phonetic information has been largely overlooked by most of existing neural LID models, although this information has been used in the conventional phonetic LID systems with a great success. We present a phone-aware neural LID architecture, which is a deep LSTM-RNN LID system but accepts output from an RNN-based ASR system. By utilizing the phonetic knowledge, the LID performance can be significantly improved. Interestingly, even if the test language is not involved in the ASR training, the phonetic knowledge still presents a large contribution. Our experiments conducted on four languages within the Babel corpus demonstrated that the phone-aware approach is highly effective.
Phone-aware Neural Language Identification
2,017
http://arxiv.org/pdf/1705.03152v2
Title Phoneaware Neural Language Identification Summary Pure acoustic neural model particularly LSTMRNN model shown great potential language identification LID However phonetic information largely overlooked existing neural LID model although information used conventional phonetic LID system great success present phoneaware neural LID architecture deep LSTMRNN LID system accepts output RNNbased ASR system utilizing phonetic knowledge LID performance significantly improved Interestingly even test language involved ASR training phonetic knowledge still present large contribution experiment conducted four language within Babel corpus demonstrated phoneaware approach highly effective Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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547
547
['Marek Rei']
1707.05233v1
Automated methods for essay scoring have made great progress in recent years, achieving accuracies very close to human annotators. However, a known weakness of such automated scorers is not taking into account the semantic relevance of the submitted text. While there is existing work on detecting answer relevance given a textual prompt, very little previous research has been done to incorporate visual writing prompts. We propose a neural architecture and several extensions for detecting off-topic responses to visual prompts and evaluate it on a dataset of texts written by language learners.
Detecting Off-topic Responses to Visual Prompts
2,017
http://arxiv.org/pdf/1707.05233v1
Title Detecting Offtopic Responses Visual Prompts Summary Automated method essay scoring made great progress recent year achieving accuracy close human annotator However known weakness automated scorer taking account semantic relevance submitted text existing work detecting answer relevance given textual prompt little previous research done incorporate visual writing prompt propose neural architecture several extension detecting offtopic response visual prompt evaluate dataset text written language learner Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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548
548
['Fréderic Godin', 'Jonas Degrave', 'Joni Dambre', 'Wesley De Neve']
1707.08214v2
In this paper, we introduce a novel type of Rectified Linear Unit (ReLU), called a Dual Rectified Linear Unit (DReLU). A DReLU, which comes with an unbounded positive and negative image, can be used as a drop-in replacement for a tanh activation function in the recurrent step of Quasi-Recurrent Neural Networks (QRNNs) (Bradbury et al. (2017)). Similar to ReLUs, DReLUs are less prone to the vanishing gradient problem, they are noise robust, and they induce sparse activations. We independently reproduce the QRNN experiments of Bradbury et al. (2017) and compare our DReLU-based QRNNs with the original tanh-based QRNNs and Long Short-Term Memory networks (LSTMs) on sentiment classification and word-level language modeling. Additionally, we evaluate on character-level language modeling, showing that we are able to stack up to eight QRNN layers with DReLUs, thus making it possible to improve the current state-of-the-art in character-level language modeling over shallow architectures based on LSTMs.
Dual Rectified Linear Units (DReLUs): A Replacement for Tanh Activation Functions in Quasi-Recurrent Neural Networks
2,017
http://arxiv.org/pdf/1707.08214v2
Title Dual Rectified Linear Units DReLUs Replacement Tanh Activation Functions QuasiRecurrent Neural Networks Summary paper introduce novel type Rectified Linear Unit ReLU called Dual Rectified Linear Unit DReLU DReLU come unbounded positive negative image used dropin replacement tanh activation function recurrent step QuasiRecurrent Neural Networks QRNNs Bradbury et al 2017 Similar ReLUs DReLUs le prone vanishing gradient problem noise robust induce sparse activation independently reproduce QRNN experiment Bradbury et al 2017 compare DReLUbased QRNNs original tanhbased QRNNs Long ShortTerm Memory network LSTMs sentiment classification wordlevel language modeling Additionally evaluate characterlevel language modeling showing able stack eight QRNN layer DReLUs thus making possible improve current stateoftheart characterlevel language modeling shallow architecture based LSTMs Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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549
549
['Mostafa Dehghani', 'Arash Mehrjou', 'Stephan Gouws', 'Jaap Kamps', 'Bernhard Schölkopf']
1711.02799v1
Training deep neural networks requires many training samples, but in practice training labels are expensive to obtain and may be of varying quality, as some may be from trusted expert labelers while others might be from heuristics or other sources of weak supervision such as crowd-sourcing. This creates a fundamental quality versus-quantity trade-off in the learning process. Do we learn from the small amount of high-quality data or the potentially large amount of weakly-labeled data? We argue that if the learner could somehow know and take the label-quality into account when learning the data representation, we could get the best of both worlds. To this end, we propose "fidelity-weighted learning" (FWL), a semi-supervised student-teacher approach for training deep neural networks using weakly-labeled data. FWL modulates the parameter updates to a student network (trained on the task we care about) on a per-sample basis according to the posterior confidence of its label-quality estimated by a teacher (who has access to the high-quality labels). Both student and teacher are learned from the data. We evaluate FWL on two tasks in information retrieval and natural language processing where we outperform state-of-the-art alternative semi-supervised methods, indicating that our approach makes better use of strong and weak labels, and leads to better task-dependent data representations.
Fidelity-Weighted Learning
2,017
http://arxiv.org/pdf/1711.02799v1
Title FidelityWeighted Learning Summary Training deep neural network requires many training sample practice training label expensive obtain may varying quality may trusted expert labelers others might heuristic source weak supervision crowdsourcing creates fundamental quality versusquantity tradeoff learning process learn small amount highquality data potentially large amount weaklylabeled data argue learner could somehow know take labelquality account learning data representation could get best world end propose fidelityweighted learning FWL semisupervised studentteacher approach training deep neural network using weaklylabeled data FWL modulates parameter update student network trained task care persample basis according posterior confidence labelquality estimated teacher access highquality label student teacher learned data evaluate FWL two task information retrieval natural language processing outperform stateoftheart alternative semisupervised method indicating approach make better use strong weak label lead better taskdependent data representation Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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550
550
['Dong Yu', 'Michael L. Seltzer', 'Jinyu Li', 'Jui-Ting Huang', 'Frank Seide']
1301.3605v3
Recent studies have shown that deep neural networks (DNNs) perform significantly better than shallow networks and Gaussian mixture models (GMMs) on large vocabulary speech recognition tasks. In this paper, we argue that the improved accuracy achieved by the DNNs is the result of their ability to extract discriminative internal representations that are robust to the many sources of variability in speech signals. We show that these representations become increasingly insensitive to small perturbations in the input with increasing network depth, which leads to better speech recognition performance with deeper networks. We also show that DNNs cannot extrapolate to test samples that are substantially different from the training examples. If the training data are sufficiently representative, however, internal features learned by the DNN are relatively stable with respect to speaker differences, bandwidth differences, and environment distortion. This enables DNN-based recognizers to perform as well or better than state-of-the-art systems based on GMMs or shallow networks without the need for explicit model adaptation or feature normalization.
Feature Learning in Deep Neural Networks - Studies on Speech Recognition Tasks
2,013
http://arxiv.org/pdf/1301.3605v3
Title Feature Learning Deep Neural Networks Studies Speech Recognition Tasks Summary Recent study shown deep neural network DNNs perform significantly better shallow network Gaussian mixture model GMMs large vocabulary speech recognition task paper argue improved accuracy achieved DNNs result ability extract discriminative internal representation robust many source variability speech signal show representation become increasingly insensitive small perturbation input increasing network depth lead better speech recognition performance deeper network also show DNNs cannot extrapolate test sample substantially different training example training data sufficiently representative however internal feature learned DNN relatively stable respect speaker difference bandwidth difference environment distortion enables DNNbased recognizers perform well better stateoftheart system based GMMs shallow network without need explicit model adaptation feature normalization Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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551
551
['Dimitri Palaz', 'Ronan Collobert', 'Mathew Magimai. -Doss']
1304.1018v2
In hybrid hidden Markov model/artificial neural networks (HMM/ANN) automatic speech recognition (ASR) system, the phoneme class conditional probabilities are estimated by first extracting acoustic features from the speech signal based on prior knowledge such as, speech perception or/and speech production knowledge, and, then modeling the acoustic features with an ANN. Recent advances in machine learning techniques, more specifically in the field of image processing and text processing, have shown that such divide and conquer strategy (i.e., separating feature extraction and modeling steps) may not be necessary. Motivated from these studies, in the framework of convolutional neural networks (CNNs), this paper investigates a novel approach, where the input to the ANN is raw speech signal and the output is phoneme class conditional probability estimates. On TIMIT phoneme recognition task, we study different ANN architectures to show the benefit of CNNs and compare the proposed approach against conventional approach where, spectral-based feature MFCC is extracted and modeled by a multilayer perceptron. Our studies show that the proposed approach can yield comparable or better phoneme recognition performance when compared to the conventional approach. It indicates that CNNs can learn features relevant for phoneme classification automatically from the raw speech signal.
Estimating Phoneme Class Conditional Probabilities from Raw Speech Signal using Convolutional Neural Networks
2,013
http://arxiv.org/pdf/1304.1018v2
Title Estimating Phoneme Class Conditional Probabilities Raw Speech Signal using Convolutional Neural Networks Summary hybrid hidden Markov modelartificial neural network HMMANN automatic speech recognition ASR system phoneme class conditional probability estimated first extracting acoustic feature speech signal based prior knowledge speech perception orand speech production knowledge modeling acoustic feature ANN Recent advance machine learning technique specifically field image processing text processing shown divide conquer strategy ie separating feature extraction modeling step may necessary Motivated study framework convolutional neural network CNNs paper investigates novel approach input ANN raw speech signal output phoneme class conditional probability estimate TIMIT phoneme recognition task study different ANN architecture show benefit CNNs compare proposed approach conventional approach spectralbased feature MFCC extracted modeled multilayer perceptron study show proposed approach yield comparable better phoneme recognition performance compared conventional approach indicates CNNs learn feature relevant phoneme classification automatically raw speech signal Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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552
552
['Samuel R. Bowman', 'Christopher Potts', 'Christopher D. Manning']
1406.1827v4
Tree-structured recursive neural networks (TreeRNNs) for sentence meaning have been successful for many applications, but it remains an open question whether the fixed-length representations that they learn can support tasks as demanding as logical deduction. We pursue this question by evaluating whether two such models---plain TreeRNNs and tree-structured neural tensor networks (TreeRNTNs)---can correctly learn to identify logical relationships such as entailment and contradiction using these representations. In our first set of experiments, we generate artificial data from a logical grammar and use it to evaluate the models' ability to learn to handle basic relational reasoning, recursive structures, and quantification. We then evaluate the models on the more natural SICK challenge data. Both models perform competitively on the SICK data and generalize well in all three experiments on simulated data, suggesting that they can learn suitable representations for logical inference in natural language.
Recursive Neural Networks Can Learn Logical Semantics
2,014
http://arxiv.org/pdf/1406.1827v4
Title Recursive Neural Networks Learn Logical Semantics Summary Treestructured recursive neural network TreeRNNs sentence meaning successful many application remains open question whether fixedlength representation learn support task demanding logical deduction pursue question evaluating whether two modelsplain TreeRNNs treestructured neural tensor network TreeRNTNscan correctly learn identify logical relationship entailment contradiction using representation first set experiment generate artificial data logical grammar use evaluate model ability learn handle basic relational reasoning recursive structure quantification evaluate model natural SICK challenge data model perform competitively SICK data generalize well three experiment simulated data suggesting learn suitable representation logical inference natural language Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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553
553
['Chenxi Zhu', 'Xipeng Qiu', 'Xinchi Chen', 'Xuanjing Huang']
1505.05667v1
In this work, we address the problem to model all the nodes (words or phrases) in a dependency tree with the dense representations. We propose a recursive convolutional neural network (RCNN) architecture to capture syntactic and compositional-semantic representations of phrases and words in a dependency tree. Different with the original recursive neural network, we introduce the convolution and pooling layers, which can model a variety of compositions by the feature maps and choose the most informative compositions by the pooling layers. Based on RCNN, we use a discriminative model to re-rank a $k$-best list of candidate dependency parsing trees. The experiments show that RCNN is very effective to improve the state-of-the-art dependency parsing on both English and Chinese datasets.
A Re-ranking Model for Dependency Parser with Recursive Convolutional Neural Network
2,015
http://arxiv.org/pdf/1505.05667v1
Title Reranking Model Dependency Parser Recursive Convolutional Neural Network Summary work address problem model node word phrase dependency tree dense representation propose recursive convolutional neural network RCNN architecture capture syntactic compositionalsemantic representation phrase word dependency tree Different original recursive neural network introduce convolution pooling layer model variety composition feature map choose informative composition pooling layer Based RCNN use discriminative model rerank kbest list candidate dependency parsing tree experiment show RCNN effective improve stateoftheart dependency parsing English Chinese datasets Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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554
554
['Lantian Li', 'Dong Wang', 'Zhiyong Zhang', 'Thomas Fang Zheng']
1505.06427v1
Recent research shows that deep neural networks (DNNs) can be used to extract deep speaker vectors (d-vectors) that preserve speaker characteristics and can be used in speaker verification. This new method has been tested on text-dependent speaker verification tasks, and improvement was reported when combined with the conventional i-vector method. This paper extends the d-vector approach to semi text-independent speaker verification tasks, i.e., the text of the speech is in a limited set of short phrases. We explore various settings of the DNN structure used for d-vector extraction, and present a phone-dependent training which employs the posterior features obtained from an ASR system. The experimental results show that it is possible to apply d-vectors on semi text-independent speaker recognition, and the phone-dependent training improves system performance.
Deep Speaker Vectors for Semi Text-independent Speaker Verification
2,015
http://arxiv.org/pdf/1505.06427v1
Title Deep Speaker Vectors Semi Textindependent Speaker Verification Summary Recent research show deep neural network DNNs used extract deep speaker vector dvectors preserve speaker characteristic used speaker verification new method tested textdependent speaker verification task improvement reported combined conventional ivector method paper extends dvector approach semi textindependent speaker verification task ie text speech limited set short phrase explore various setting DNN structure used dvector extraction present phonedependent training employ posterior feature obtained ASR system experimental result show possible apply dvectors semi textindependent speaker recognition phonedependent training improves system performance Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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555
555
['Tom Sercu', 'Vaibhava Goel']
1604.01792v2
Very deep CNNs with small 3x3 kernels have recently been shown to achieve very strong performance as acoustic models in hybrid NN-HMM speech recognition systems. In this paper we investigate how to efficiently scale these models to larger datasets. Specifically, we address the design choice of pooling and padding along the time dimension which renders convolutional evaluation of sequences highly inefficient. We propose a new CNN design without timepadding and without timepooling, which is slightly suboptimal for accuracy, but has two significant advantages: it enables sequence training and deployment by allowing efficient convolutional evaluation of full utterances, and, it allows for batch normalization to be straightforwardly adopted to CNNs on sequence data. Through batch normalization, we recover the lost peformance from removing the time-pooling, while keeping the benefit of efficient convolutional evaluation. We demonstrate the performance of our models both on larger scale data than before, and after sequence training. Our very deep CNN model sequence trained on the 2000h switchboard dataset obtains 9.4 word error rate on the Hub5 test-set, matching with a single model the performance of the 2015 IBM system combination, which was the previous best published result.
Advances in Very Deep Convolutional Neural Networks for LVCSR
2,016
http://arxiv.org/pdf/1604.01792v2
Title Advances Deep Convolutional Neural Networks LVCSR Summary deep CNNs small 3x3 kernel recently shown achieve strong performance acoustic model hybrid NNHMM speech recognition system paper investigate efficiently scale model larger datasets Specifically address design choice pooling padding along time dimension render convolutional evaluation sequence highly inefficient propose new CNN design without timepadding without timepooling slightly suboptimal accuracy two significant advantage enables sequence training deployment allowing efficient convolutional evaluation full utterance allows batch normalization straightforwardly adopted CNNs sequence data batch normalization recover lost peformance removing timepooling keeping benefit efficient convolutional evaluation demonstrate performance model larger scale data sequence training deep CNN model sequence trained 2000h switchboard dataset obtains 94 word error rate Hub5 testset matching single model performance 2015 IBM system combination previous best published result Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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556
556
['Zhiyun Lu', 'Vikas Sindhwani', 'Tara N. Sainath']
1604.02594v1
Recurrent neural networks (RNNs), including long short-term memory (LSTM) RNNs, have produced state-of-the-art results on a variety of speech recognition tasks. However, these models are often too large in size for deployment on mobile devices with memory and latency constraints. In this work, we study mechanisms for learning compact RNNs and LSTMs via low-rank factorizations and parameter sharing schemes. Our goal is to investigate redundancies in recurrent architectures where compression can be admitted without losing performance. A hybrid strategy of using structured matrices in the bottom layers and shared low-rank factors on the top layers is found to be particularly effective, reducing the parameters of a standard LSTM by 75%, at a small cost of 0.3% increase in WER, on a 2,000-hr English Voice Search task.
Learning Compact Recurrent Neural Networks
2,016
http://arxiv.org/pdf/1604.02594v1
Title Learning Compact Recurrent Neural Networks Summary Recurrent neural network RNNs including long shortterm memory LSTM RNNs produced stateoftheart result variety speech recognition task However model often large size deployment mobile device memory latency constraint work study mechanism learning compact RNNs LSTMs via lowrank factorization parameter sharing scheme goal investigate redundancy recurrent architecture compression admitted without losing performance hybrid strategy using structured matrix bottom layer shared lowrank factor top layer found particularly effective reducing parameter standard LSTM 75 small cost 03 increase WER 2000hr English Voice Search task Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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557
557
['Adhiguna Kuncoro', 'Yuichiro Sawai', 'Kevin Duh', 'Yuji Matsumoto']
1604.06529v2
We propose a transition-based dependency parser using Recurrent Neural Networks with Long Short-Term Memory (LSTM) units. This extends the feedforward neural network parser of Chen and Manning (2014) and enables modelling of entire sequences of shift/reduce transition decisions. On the Google Web Treebank, our LSTM parser is competitive with the best feedforward parser on overall accuracy and notably achieves more than 3% improvement for long-range dependencies, which has proved difficult for previous transition-based parsers due to error propagation and limited context information. Our findings additionally suggest that dropout regularisation on the embedding layer is crucial to improve the LSTM's generalisation.
Dependency Parsing with LSTMs: An Empirical Evaluation
2,016
http://arxiv.org/pdf/1604.06529v2
Title Dependency Parsing LSTMs Empirical Evaluation Summary propose transitionbased dependency parser using Recurrent Neural Networks Long ShortTerm Memory LSTM unit extends feedforward neural network parser Chen Manning 2014 enables modelling entire sequence shiftreduce transition decision Google Web Treebank LSTM parser competitive best feedforward parser overall accuracy notably achieves 3 improvement longrange dependency proved difficult previous transitionbased parser due error propagation limited context information finding additionally suggest dropout regularisation embedding layer crucial improve LSTMs generalisation Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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558
558
['Hamid Palangi', 'Li Deng', 'Yelong Shen', 'Jianfeng Gao', 'Xiaodong He', 'Jianshu Chen', 'Xinying Song', 'Rabab Ward']
1502.06922v3
This paper develops a model that addresses sentence embedding, a hot topic in current natural language processing research, using recurrent neural networks with Long Short-Term Memory (LSTM) cells. Due to its ability to capture long term memory, the LSTM-RNN accumulates increasingly richer information as it goes through the sentence, and when it reaches the last word, the hidden layer of the network provides a semantic representation of the whole sentence. In this paper, the LSTM-RNN is trained in a weakly supervised manner on user click-through data logged by a commercial web search engine. Visualization and analysis are performed to understand how the embedding process works. The model is found to automatically attenuate the unimportant words and detects the salient keywords in the sentence. Furthermore, these detected keywords are found to automatically activate different cells of the LSTM-RNN, where words belonging to a similar topic activate the same cell. As a semantic representation of the sentence, the embedding vector can be used in many different applications. These automatic keyword detection and topic allocation abilities enabled by the LSTM-RNN allow the network to perform document retrieval, a difficult language processing task, where the similarity between the query and documents can be measured by the distance between their corresponding sentence embedding vectors computed by the LSTM-RNN. On a web search task, the LSTM-RNN embedding is shown to significantly outperform several existing state of the art methods. We emphasize that the proposed model generates sentence embedding vectors that are specially useful for web document retrieval tasks. A comparison with a well known general sentence embedding method, the Paragraph Vector, is performed. The results show that the proposed method in this paper significantly outperforms it for web document retrieval task.
Deep Sentence Embedding Using Long Short-Term Memory Networks: Analysis and Application to Information Retrieval
2,015
http://arxiv.org/pdf/1502.06922v3
Title Deep Sentence Embedding Using Long ShortTerm Memory Networks Analysis Application Information Retrieval Summary paper develops model address sentence embedding hot topic current natural language processing research using recurrent neural network Long ShortTerm Memory LSTM cell Due ability capture long term memory LSTMRNN accumulates increasingly richer information go sentence reach last word hidden layer network provides semantic representation whole sentence paper LSTMRNN trained weakly supervised manner user clickthrough data logged commercial web search engine Visualization analysis performed understand embedding process work model found automatically attenuate unimportant word detects salient keywords sentence Furthermore detected keywords found automatically activate different cell LSTMRNN word belonging similar topic activate cell semantic representation sentence embedding vector used many different application automatic keyword detection topic allocation ability enabled LSTMRNN allow network perform document retrieval difficult language processing task similarity query document measured distance corresponding sentence embedding vector computed LSTMRNN web search task LSTMRNN embedding shown significantly outperform several existing state art method emphasize proposed model generates sentence embedding vector specially useful web document retrieval task comparison well known general sentence embedding method Paragraph Vector performed result show proposed method paper significantly outperforms web document retrieval task Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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559
559
['Fandong Meng', 'Zhengdong Lu', 'Mingxuan Wang', 'Hang Li', 'Wenbin Jiang', 'Qun Liu']
1503.01838v5
The recently proposed neural network joint model (NNJM) (Devlin et al., 2014) augments the n-gram target language model with a heuristically chosen source context window, achieving state-of-the-art performance in SMT. In this paper, we give a more systematic treatment by summarizing the relevant source information through a convolutional architecture guided by the target information. With different guiding signals during decoding, our specifically designed convolution+gating architectures can pinpoint the parts of a source sentence that are relevant to predicting a target word, and fuse them with the context of entire source sentence to form a unified representation. This representation, together with target language words, are fed to a deep neural network (DNN) to form a stronger NNJM. Experiments on two NIST Chinese-English translation tasks show that the proposed model can achieve significant improvements over the previous NNJM by up to +1.08 BLEU points on average
Encoding Source Language with Convolutional Neural Network for Machine Translation
2,015
http://arxiv.org/pdf/1503.01838v5
Title Encoding Source Language Convolutional Neural Network Machine Translation Summary recently proposed neural network joint model NNJM Devlin et al 2014 augments ngram target language model heuristically chosen source context window achieving stateoftheart performance SMT paper give systematic treatment summarizing relevant source information convolutional architecture guided target information different guiding signal decoding specifically designed convolutiongating architecture pinpoint part source sentence relevant predicting target word fuse context entire source sentence form unified representation representation together target language word fed deep neural network DNN form stronger NNJM Experiments two NIST ChineseEnglish translation task show proposed model achieve significant improvement previous NNJM 108 BLEU point average Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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['Zhen Huang', 'Sabato Marco Siniscalchi', 'I-Fan Chen', 'Jiadong Wu', 'Chin-Hui Lee']
1503.02108v2
We present a Bayesian approach to adapting parameters of a well-trained context-dependent, deep-neural-network, hidden Markov model (CD-DNN-HMM) to improve automatic speech recognition performance. Given an abundance of DNN parameters but with only a limited amount of data, the effectiveness of the adapted DNN model can often be compromised. We formulate maximum a posteriori (MAP) adaptation of parameters of a specially designed CD-DNN-HMM with an augmented linear hidden networks connected to the output tied states, or senones, and compare it to feature space MAP linear regression previously proposed. Experimental evidences on the 20,000-word open vocabulary Wall Street Journal task demonstrate the feasibility of the proposed framework. In supervised adaptation, the proposed MAP adaptation approach provides more than 10% relative error reduction and consistently outperforms the conventional transformation based methods. Furthermore, we present an initial attempt to generate hierarchical priors to improve adaptation efficiency and effectiveness with limited adaptation data by exploiting similarities among senones.
Maximum a Posteriori Adaptation of Network Parameters in Deep Models
2,015
http://arxiv.org/pdf/1503.02108v2
Title Maximum Posteriori Adaptation Network Parameters Deep Models Summary present Bayesian approach adapting parameter welltrained contextdependent deepneuralnetwork hidden Markov model CDDNNHMM improve automatic speech recognition performance Given abundance DNN parameter limited amount data effectiveness adapted DNN model often compromised formulate maximum posteriori MAP adaptation parameter specially designed CDDNNHMM augmented linear hidden network connected output tied state senones compare feature space MAP linear regression previously proposed Experimental evidence 20000word open vocabulary Wall Street Journal task demonstrate feasibility proposed framework supervised adaptation proposed MAP adaptation approach provides 10 relative error reduction consistently outperforms conventional transformation based method Furthermore present initial attempt generate hierarchical prior improve adaptation efficiency effectiveness limited adaptation data exploiting similarity among senones Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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561
561
['Zhaopeng Tu', 'Baotian Hu', 'Zhengdong Lu', 'Hang Li']
1503.02357v2
We propose a novel method for translation selection in statistical machine translation, in which a convolutional neural network is employed to judge the similarity between a phrase pair in two languages. The specifically designed convolutional architecture encodes not only the semantic similarity of the translation pair, but also the context containing the phrase in the source language. Therefore, our approach is able to capture context-dependent semantic similarities of translation pairs. We adopt a curriculum learning strategy to train the model: we classify the training examples into easy, medium, and difficult categories, and gradually build the ability of representing phrase and sentence level context by using training examples from easy to difficult. Experimental results show that our approach significantly outperforms the baseline system by up to 1.4 BLEU points.
Context-Dependent Translation Selection Using Convolutional Neural Network
2,015
http://arxiv.org/pdf/1503.02357v2
Title ContextDependent Translation Selection Using Convolutional Neural Network Summary propose novel method translation selection statistical machine translation convolutional neural network employed judge similarity phrase pair two language specifically designed convolutional architecture encodes semantic similarity translation pair also context containing phrase source language Therefore approach able capture contextdependent semantic similarity translation pair adopt curriculum learning strategy train model classify training example easy medium difficult category gradually build ability representing phrase sentence level context using training example easy difficult Experimental result show approach significantly outperforms baseline system 14 BLEU point Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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562
562
['Baotian Hu', 'Zhengdong Lu', 'Hang Li', 'Qingcai Chen']
1503.03244v1
Semantic matching is of central importance to many natural language tasks \cite{bordes2014semantic,RetrievalQA}. A successful matching algorithm needs to adequately model the internal structures of language objects and the interaction between them. As a step toward this goal, we propose convolutional neural network models for matching two sentences, by adapting the convolutional strategy in vision and speech. The proposed models not only nicely represent the hierarchical structures of sentences with their layer-by-layer composition and pooling, but also capture the rich matching patterns at different levels. Our models are rather generic, requiring no prior knowledge on language, and can hence be applied to matching tasks of different nature and in different languages. The empirical study on a variety of matching tasks demonstrates the efficacy of the proposed model on a variety of matching tasks and its superiority to competitor models.
Convolutional Neural Network Architectures for Matching Natural Language Sentences
2,015
http://arxiv.org/pdf/1503.03244v1
Title Convolutional Neural Network Architectures Matching Natural Language Sentences Summary Semantic matching central importance many natural language task citebordes2014semanticRetrievalQA successful matching algorithm need adequately model internal structure language object interaction step toward goal propose convolutional neural network model matching two sentence adapting convolutional strategy vision speech proposed model nicely represent hierarchical structure sentence layerbylayer composition pooling also capture rich matching pattern different level model rather generic requiring prior knowledge language hence applied matching task different nature different language empirical study variety matching task demonstrates efficacy proposed model variety matching task superiority competitor model Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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563
563
['Xiaodan Zhu', 'Parinaz Sobhani', 'Hongyu Guo']
1503.04881v1
The chain-structured long short-term memory (LSTM) has showed to be effective in a wide range of problems such as speech recognition and machine translation. In this paper, we propose to extend it to tree structures, in which a memory cell can reflect the history memories of multiple child cells or multiple descendant cells in a recursive process. We call the model S-LSTM, which provides a principled way of considering long-distance interaction over hierarchies, e.g., language or image parse structures. We leverage the models for semantic composition to understand the meaning of text, a fundamental problem in natural language understanding, and show that it outperforms a state-of-the-art recursive model by replacing its composition layers with the S-LSTM memory blocks. We also show that utilizing the given structures is helpful in achieving a performance better than that without considering the structures.
Long Short-Term Memory Over Tree Structures
2,015
http://arxiv.org/pdf/1503.04881v1
Title Long ShortTerm Memory Tree Structures Summary chainstructured long shortterm memory LSTM showed effective wide range problem speech recognition machine translation paper propose extend tree structure memory cell reflect history memory multiple child cell multiple descendant cell recursive process call model SLSTM provides principled way considering longdistance interaction hierarchy eg language image parse structure leverage model semantic composition understand meaning text fundamental problem natural language understanding show outperforms stateoftheart recursive model replacing composition layer SLSTM memory block also show utilizing given structure helpful achieving performance better without considering structure Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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564
564
['Krupakar Hans', 'R S Milton']
1612.02482v2
The advent of the attention mechanism in neural machine translation models has improved the performance of machine translation systems by enabling selective lookup into the source sentence. In this paper, the efficiencies of translation using bidirectional encoder attention decoder models were studied with respect to translation involving morphologically rich languages. The English - Tamil language pair was selected for this analysis. First, the use of Word2Vec embedding for both the English and Tamil words improved the translation results by 0.73 BLEU points over the baseline RNNSearch model with 4.84 BLEU score. The use of morphological segmentation before word vectorization to split the morphologically rich Tamil words into their respective morphemes before the translation, caused a reduction in the target vocabulary size by a factor of 8. Also, this model (RNNMorph) improved the performance of neural machine translation by 7.05 BLEU points over the RNNSearch model used over the same corpus. Since the BLEU evaluation of the RNNMorph model might be unreliable due to an increase in the number of matching tokens per sentence, the performances of the translations were also compared by means of human evaluation metrics of adequacy, fluency and relative ranking. Further, the use of morphological segmentation also improved the efficacy of the attention mechanism.
Improving the Performance of Neural Machine Translation Involving Morphologically Rich Languages
2,016
http://arxiv.org/pdf/1612.02482v2
Title Improving Performance Neural Machine Translation Involving Morphologically Rich Languages Summary advent attention mechanism neural machine translation model improved performance machine translation system enabling selective lookup source sentence paper efficiency translation using bidirectional encoder attention decoder model studied respect translation involving morphologically rich language English Tamil language pair selected analysis First use Word2Vec embedding English Tamil word improved translation result 073 BLEU point baseline RNNSearch model 484 BLEU score use morphological segmentation word vectorization split morphologically rich Tamil word respective morpheme translation caused reduction target vocabulary size factor 8 Also model RNNMorph improved performance neural machine translation 705 BLEU point RNNSearch model used corpus Since BLEU evaluation RNNMorph model might unreliable due increase number matching token per sentence performance translation also compared mean human evaluation metric adequacy fluency relative ranking use morphological segmentation also improved efficacy attention mechanism Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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565
565
['Thomas Laurent', 'James von Brecht']
1612.06212v1
We introduce an exceptionally simple gated recurrent neural network (RNN) that achieves performance comparable to well-known gated architectures, such as LSTMs and GRUs, on the word-level language modeling task. We prove that our model has simple, predicable and non-chaotic dynamics. This stands in stark contrast to more standard gated architectures, whose underlying dynamical systems exhibit chaotic behavior.
A recurrent neural network without chaos
2,016
http://arxiv.org/pdf/1612.06212v1
Title recurrent neural network without chaos Summary introduce exceptionally simple gated recurrent neural network RNN achieves performance comparable wellknown gated architecture LSTMs GRUs wordlevel language modeling task prove model simple predicable nonchaotic dynamic stand stark contrast standard gated architecture whose underlying dynamical system exhibit chaotic behavior Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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566
566
['Dimitri Palaz', 'Ronan Collobert', 'Mathew Magimai. -Doss']
1312.2137v1
Most phoneme recognition state-of-the-art systems rely on a classical neural network classifiers, fed with highly tuned features, such as MFCC or PLP features. Recent advances in ``deep learning'' approaches questioned such systems, but while some attempts were made with simpler features such as spectrograms, state-of-the-art systems still rely on MFCCs. This might be viewed as a kind of failure from deep learning approaches, which are often claimed to have the ability to train with raw signals, alleviating the need of hand-crafted features. In this paper, we investigate a convolutional neural network approach for raw speech signals. While convolutional architectures got tremendous success in computer vision or text processing, they seem to have been let down in the past recent years in the speech processing field. We show that it is possible to learn an end-to-end phoneme sequence classifier system directly from raw signal, with similar performance on the TIMIT and WSJ datasets than existing systems based on MFCC, questioning the need of complex hand-crafted features on large datasets.
End-to-end Phoneme Sequence Recognition using Convolutional Neural Networks
2,013
http://arxiv.org/pdf/1312.2137v1
Title Endtoend Phoneme Sequence Recognition using Convolutional Neural Networks Summary phoneme recognition stateoftheart system rely classical neural network classifier fed highly tuned feature MFCC PLP feature Recent advance deep learning approach questioned system attempt made simpler feature spectrogram stateoftheart system still rely MFCCs might viewed kind failure deep learning approach often claimed ability train raw signal alleviating need handcrafted feature paper investigate convolutional neural network approach raw speech signal convolutional architecture got tremendous success computer vision text processing seem let past recent year speech processing field show possible learn endtoend phoneme sequence classifier system directly raw signal similar performance TIMIT WSJ datasets existing system based MFCC questioning need complex handcrafted feature large datasets Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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567
567
['Prasanna Kumar Muthukumar', 'Alan W. Black']
1409.8558v1
Nearly all Statistical Parametric Speech Synthesizers today use Mel Cepstral coefficients as the vocal tract parameterization of the speech signal. Mel Cepstral coefficients were never intended to work in a parametric speech synthesis framework, but as yet, there has been little success in creating a better parameterization that is more suited to synthesis. In this paper, we use deep learning algorithms to investigate a data-driven parameterization technique that is designed for the specific requirements of synthesis. We create an invertible, low-dimensional, noise-robust encoding of the Mel Log Spectrum by training a tapered Stacked Denoising Autoencoder (SDA). This SDA is then unwrapped and used as the initialization for a Multi-Layer Perceptron (MLP). The MLP is fine-tuned by training it to reconstruct the input at the output layer. This MLP is then split down the middle to form encoding and decoding networks. These networks produce a parameterization of the Mel Log Spectrum that is intended to better fulfill the requirements of synthesis. Results are reported for experiments conducted using this resulting parameterization with the ClusterGen speech synthesizer.
A Deep Learning Approach to Data-driven Parameterizations for Statistical Parametric Speech Synthesis
2,014
http://arxiv.org/pdf/1409.8558v1
Title Deep Learning Approach Datadriven Parameterizations Statistical Parametric Speech Synthesis Summary Nearly Statistical Parametric Speech Synthesizers today use Mel Cepstral coefficient vocal tract parameterization speech signal Mel Cepstral coefficient never intended work parametric speech synthesis framework yet little success creating better parameterization suited synthesis paper use deep learning algorithm investigate datadriven parameterization technique designed specific requirement synthesis create invertible lowdimensional noiserobust encoding Mel Log Spectrum training tapered Stacked Denoising Autoencoder SDA SDA unwrapped used initialization MultiLayer Perceptron MLP MLP finetuned training reconstruct input output layer MLP split middle form encoding decoding network network produce parameterization Mel Log Spectrum intended better fulfill requirement synthesis Results reported experiment conducted using resulting parameterization ClusterGen speech synthesizer Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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568
568
['Minh-Thang Luong', 'Ilya Sutskever', 'Quoc V. Le', 'Oriol Vinyals', 'Wojciech Zaremba']
1410.8206v4
Neural Machine Translation (NMT) is a new approach to machine translation that has shown promising results that are comparable to traditional approaches. A significant weakness in conventional NMT systems is their inability to correctly translate very rare words: end-to-end NMTs tend to have relatively small vocabularies with a single unk symbol that represents every possible out-of-vocabulary (OOV) word. In this paper, we propose and implement an effective technique to address this problem. We train an NMT system on data that is augmented by the output of a word alignment algorithm, allowing the NMT system to emit, for each OOV word in the target sentence, the position of its corresponding word in the source sentence. This information is later utilized in a post-processing step that translates every OOV word using a dictionary. Our experiments on the WMT14 English to French translation task show that this method provides a substantial improvement of up to 2.8 BLEU points over an equivalent NMT system that does not use this technique. With 37.5 BLEU points, our NMT system is the first to surpass the best result achieved on a WMT14 contest task.
Addressing the Rare Word Problem in Neural Machine Translation
2,014
http://arxiv.org/pdf/1410.8206v4
Title Addressing Rare Word Problem Neural Machine Translation Summary Neural Machine Translation NMT new approach machine translation shown promising result comparable traditional approach significant weakness conventional NMT system inability correctly translate rare word endtoend NMTs tend relatively small vocabulary single unk symbol represents every possible outofvocabulary OOV word paper propose implement effective technique address problem train NMT system data augmented output word alignment algorithm allowing NMT system emit OOV word target sentence position corresponding word source sentence information later utilized postprocessing step translates every OOV word using dictionary experiment WMT14 English French translation task show method provides substantial improvement 28 BLEU point equivalent NMT system use technique 375 BLEU point NMT system first surpass best result achieved WMT14 contest task Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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569
569
['Jianpeng Cheng', 'Dimitri Kartsaklis', 'Edward Grefenstette']
1411.4116v1
This paper aims to explore the effect of prior disambiguation on neural network- based compositional models, with the hope that better semantic representations for text compounds can be produced. We disambiguate the input word vectors before they are fed into a compositional deep net. A series of evaluations shows the positive effect of prior disambiguation for such deep models.
Investigating the Role of Prior Disambiguation in Deep-learning Compositional Models of Meaning
2,014
http://arxiv.org/pdf/1411.4116v1
Title Investigating Role Prior Disambiguation Deeplearning Compositional Models Meaning Summary paper aim explore effect prior disambiguation neural network based compositional model hope better semantic representation text compound produced disambiguate input word vector fed compositional deep net series evaluation show positive effect prior disambiguation deep model Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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570
570
['Awni Hannun', 'Carl Case', 'Jared Casper', 'Bryan Catanzaro', 'Greg Diamos', 'Erich Elsen', 'Ryan Prenger', 'Sanjeev Satheesh', 'Shubho Sengupta', 'Adam Coates', 'Andrew Y. Ng']
1412.5567v2
We present a state-of-the-art speech recognition system developed using end-to-end deep learning. Our architecture is significantly simpler than traditional speech systems, which rely on laboriously engineered processing pipelines; these traditional systems also tend to perform poorly when used in noisy environments. In contrast, our system does not need hand-designed components to model background noise, reverberation, or speaker variation, but instead directly learns a function that is robust to such effects. We do not need a phoneme dictionary, nor even the concept of a "phoneme." Key to our approach is a well-optimized RNN training system that uses multiple GPUs, as well as a set of novel data synthesis techniques that allow us to efficiently obtain a large amount of varied data for training. Our system, called Deep Speech, outperforms previously published results on the widely studied Switchboard Hub5'00, achieving 16.0% error on the full test set. Deep Speech also handles challenging noisy environments better than widely used, state-of-the-art commercial speech systems.
Deep Speech: Scaling up end-to-end speech recognition
2,014
http://arxiv.org/pdf/1412.5567v2
Title Deep Speech Scaling endtoend speech recognition Summary present stateoftheart speech recognition system developed using endtoend deep learning architecture significantly simpler traditional speech system rely laboriously engineered processing pipeline traditional system also tend perform poorly used noisy environment contrast system need handdesigned component model background noise reverberation speaker variation instead directly learns function robust effect need phoneme dictionary even concept phoneme Key approach welloptimized RNN training system us multiple GPUs well set novel data synthesis technique allow u efficiently obtain large amount varied data training system called Deep Speech outperforms previously published result widely studied Switchboard Hub500 achieving 160 error full test set Deep Speech also handle challenging noisy environment better widely used stateoftheart commercial speech system Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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571
571
['Aram Ter-Sarkisov', 'Holger Schwenk', 'Loic Barrault', 'Fethi Bougares']
1412.6650v4
It is today acknowledged that neural network language models outperform backoff language models in applications like speech recognition or statistical machine translation. However, training these models on large amounts of data can take several days. We present efficient techniques to adapt a neural network language model to new data. Instead of training a completely new model or relying on mixture approaches, we propose two new methods: continued training on resampled data or insertion of adaptation layers. We present experimental results in an CAT environment where the post-edits of professional translators are used to improve an SMT system. Both methods are very fast and achieve significant improvements without overfitting the small adaptation data.
Incremental Adaptation Strategies for Neural Network Language Models
2,014
http://arxiv.org/pdf/1412.6650v4
Title Incremental Adaptation Strategies Neural Network Language Models Summary today acknowledged neural network language model outperform backoff language model application like speech recognition statistical machine translation However training model large amount data take several day present efficient technique adapt neural network language model new data Instead training completely new model relying mixture approach propose two new method continued training resampled data insertion adaptation layer present experimental result CAT environment postedits professional translator used improve SMT system method fast achieve significant improvement without overfitting small adaptation data Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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572
572
['Joël Legrand', 'Ronan Collobert']
1412.7028v4
This paper introduces a greedy parser based on neural networks, which leverages a new compositional sub-tree representation. The greedy parser and the compositional procedure are jointly trained, and tightly depends on each-other. The composition procedure outputs a vector representation which summarizes syntactically (parsing tags) and semantically (words) sub-trees. Composition and tagging is achieved over continuous (word or tag) representations, and recurrent neural networks. We reach F1 performance on par with well-known existing parsers, while having the advantage of speed, thanks to the greedy nature of the parser. We provide a fully functional implementation of the method described in this paper.
Joint RNN-Based Greedy Parsing and Word Composition
2,014
http://arxiv.org/pdf/1412.7028v4
Title Joint RNNBased Greedy Parsing Word Composition Summary paper introduces greedy parser based neural network leverage new compositional subtree representation greedy parser compositional procedure jointly trained tightly depends eachother composition procedure output vector representation summarizes syntactically parsing tag semantically word subtrees Composition tagging achieved continuous word tag representation recurrent neural network reach F1 performance par wellknown existing parser advantage speed thanks greedy nature parser provide fully functional implementation method described paper Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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573
573
['Pascal Vincent', 'Alexandre de Brébisson', 'Xavier Bouthillier']
1412.7091v3
An important class of problems involves training deep neural networks with sparse prediction targets of very high dimension D. These occur naturally in e.g. neural language models or the learning of word-embeddings, often posed as predicting the probability of next words among a vocabulary of size D (e.g. 200 000). Computing the equally large, but typically non-sparse D-dimensional output vector from a last hidden layer of reasonable dimension d (e.g. 500) incurs a prohibitive O(Dd) computational cost for each example, as does updating the D x d output weight matrix and computing the gradient needed for backpropagation to previous layers. While efficient handling of large sparse network inputs is trivial, the case of large sparse targets is not, and has thus so far been sidestepped with approximate alternatives such as hierarchical softmax or sampling-based approximations during training. In this work we develop an original algorithmic approach which, for a family of loss functions that includes squared error and spherical softmax, can compute the exact loss, gradient update for the output weights, and gradient for backpropagation, all in O(d^2) per example instead of O(Dd), remarkably without ever computing the D-dimensional output. The proposed algorithm yields a speedup of D/4d , i.e. two orders of magnitude for typical sizes, for that critical part of the computations that often dominates the training time in this kind of network architecture.
Efficient Exact Gradient Update for training Deep Networks with Very Large Sparse Targets
2,014
http://arxiv.org/pdf/1412.7091v3
Title Efficient Exact Gradient Update training Deep Networks Large Sparse Targets Summary important class problem involves training deep neural network sparse prediction target high dimension occur naturally eg neural language model learning wordembeddings often posed predicting probability next word among vocabulary size eg 200 000 Computing equally large typically nonsparse Ddimensional output vector last hidden layer reasonable dimension eg 500 incurs prohibitive ODd computational cost example updating x output weight matrix computing gradient needed backpropagation previous layer efficient handling large sparse network input trivial case large sparse target thus far sidestepped approximate alternative hierarchical softmax samplingbased approximation training work develop original algorithmic approach family loss function includes squared error spherical softmax compute exact loss gradient update output weight gradient backpropagation Od2 per example instead ODd remarkably without ever computing Ddimensional output proposed algorithm yield speedup D4d ie two order magnitude typical size critical part computation often dominates training time kind network architecture Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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574
574
['Lili Mou', 'Hao Peng', 'Ge Li', 'Yan Xu', 'Lu Zhang', 'Zhi Jin']
1504.01106v5
This paper proposes a tree-based convolutional neural network (TBCNN) for discriminative sentence modeling. Our models leverage either constituency trees or dependency trees of sentences. The tree-based convolution process extracts sentences' structural features, and these features are aggregated by max pooling. Such architecture allows short propagation paths between the output layer and underlying feature detectors, which enables effective structural feature learning and extraction. We evaluate our models on two tasks: sentiment analysis and question classification. In both experiments, TBCNN outperforms previous state-of-the-art results, including existing neural networks and dedicated feature/rule engineering. We also make efforts to visualize the tree-based convolution process, shedding light on how our models work.
Discriminative Neural Sentence Modeling by Tree-Based Convolution
2,015
http://arxiv.org/pdf/1504.01106v5
Title Discriminative Neural Sentence Modeling TreeBased Convolution Summary paper proposes treebased convolutional neural network TBCNN discriminative sentence modeling model leverage either constituency tree dependency tree sentence treebased convolution process extract sentence structural feature feature aggregated max pooling architecture allows short propagation path output layer underlying feature detector enables effective structural feature learning extraction evaluate model two task sentiment analysis question classification experiment TBCNN outperforms previous stateoftheart result including existing neural network dedicated featurerule engineering also make effort visualize treebased convolution process shedding light model work Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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575
575
['Han Zhao', 'Zhengdong Lu', 'Pascal Poupart']
1504.05070v2
The ability to accurately model a sentence at varying stages (e.g., word-phrase-sentence) plays a central role in natural language processing. As an effort towards this goal we propose a self-adaptive hierarchical sentence model (AdaSent). AdaSent effectively forms a hierarchy of representations from words to phrases and then to sentences through recursive gated local composition of adjacent segments. We design a competitive mechanism (through gating networks) to allow the representations of the same sentence to be engaged in a particular learning task (e.g., classification), therefore effectively mitigating the gradient vanishing problem persistent in other recursive models. Both qualitative and quantitative analysis shows that AdaSent can automatically form and select the representations suitable for the task at hand during training, yielding superior classification performance over competitor models on 5 benchmark data sets.
Self-Adaptive Hierarchical Sentence Model
2,015
http://arxiv.org/pdf/1504.05070v2
Title SelfAdaptive Hierarchical Sentence Model Summary ability accurately model sentence varying stage eg wordphrasesentence play central role natural language processing effort towards goal propose selfadaptive hierarchical sentence model AdaSent AdaSent effectively form hierarchy representation word phrase sentence recursive gated local composition adjacent segment design competitive mechanism gating network allow representation sentence engaged particular learning task eg classification therefore effectively mitigating gradient vanishing problem persistent recursive model qualitative quantitative analysis show AdaSent automatically form select representation suitable task hand training yielding superior classification performance competitor model 5 benchmark data set Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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576
576
['Cicero Nogueira dos Santos', 'Bing Xiang', 'Bowen Zhou']
1504.06580v2
Relation classification is an important semantic processing task for which state-ofthe-art systems still rely on costly handcrafted features. In this work we tackle the relation classification task using a convolutional neural network that performs classification by ranking (CR-CNN). We propose a new pairwise ranking loss function that makes it easy to reduce the impact of artificial classes. We perform experiments using the the SemEval-2010 Task 8 dataset, which is designed for the task of classifying the relationship between two nominals marked in a sentence. Using CRCNN, we outperform the state-of-the-art for this dataset and achieve a F1 of 84.1 without using any costly handcrafted features. Additionally, our experimental results show that: (1) our approach is more effective than CNN followed by a softmax classifier; (2) omitting the representation of the artificial class Other improves both precision and recall; and (3) using only word embeddings as input features is enough to achieve state-of-the-art results if we consider only the text between the two target nominals.
Classifying Relations by Ranking with Convolutional Neural Networks
2,015
http://arxiv.org/pdf/1504.06580v2
Title Classifying Relations Ranking Convolutional Neural Networks Summary Relation classification important semantic processing task stateoftheart system still rely costly handcrafted feature work tackle relation classification task using convolutional neural network performs classification ranking CRCNN propose new pairwise ranking loss function make easy reduce impact artificial class perform experiment using SemEval2010 Task 8 dataset designed task classifying relationship two nominal marked sentence Using CRCNN outperform stateoftheart dataset achieve F1 841 without using costly handcrafted feature Additionally experimental result show 1 approach effective CNN followed softmax classifier 2 omitting representation artificial class improves precision recall 3 using word embeddings input feature enough achieve stateoftheart result consider text two target nominal Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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577
577
['Thanh-Le Ha', 'Jan Niehues', 'Alex Waibel']
1504.07395v1
In this paper we combine the advantages of a model using global source sentence contexts, the Discriminative Word Lexicon, and neural networks. By using deep neural networks instead of the linear maximum entropy model in the Discriminative Word Lexicon models, we are able to leverage dependencies between different source words due to the non-linearity. Furthermore, the models for different target words can share parameters and therefore data sparsity problems are effectively reduced. By using this approach in a state-of-the-art translation system, we can improve the performance by up to 0.5 BLEU points for three different language pairs on the TED translation task.
Lexical Translation Model Using a Deep Neural Network Architecture
2,015
http://arxiv.org/pdf/1504.07395v1
Title Lexical Translation Model Using Deep Neural Network Architecture Summary paper combine advantage model using global source sentence context Discriminative Word Lexicon neural network using deep neural network instead linear maximum entropy model Discriminative Word Lexicon model able leverage dependency different source word due nonlinearity Furthermore model different target word share parameter therefore data sparsity problem effectively reduced using approach stateoftheart translation system improve performance 05 BLEU point three different language pair TED translation task Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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578
578
['Andrej Karpathy', 'Justin Johnson', 'Li Fei-Fei']
1506.02078v2
Recurrent Neural Networks (RNNs), and specifically a variant with Long Short-Term Memory (LSTM), are enjoying renewed interest as a result of successful applications in a wide range of machine learning problems that involve sequential data. However, while LSTMs provide exceptional results in practice, the source of their performance and their limitations remain rather poorly understood. Using character-level language models as an interpretable testbed, we aim to bridge this gap by providing an analysis of their representations, predictions and error types. In particular, our experiments reveal the existence of interpretable cells that keep track of long-range dependencies such as line lengths, quotes and brackets. Moreover, our comparative analysis with finite horizon n-gram models traces the source of the LSTM improvements to long-range structural dependencies. Finally, we provide analysis of the remaining errors and suggests areas for further study.
Visualizing and Understanding Recurrent Networks
2,015
http://arxiv.org/pdf/1506.02078v2
Title Visualizing Understanding Recurrent Networks Summary Recurrent Neural Networks RNNs specifically variant Long ShortTerm Memory LSTM enjoying renewed interest result successful application wide range machine learning problem involve sequential data However LSTMs provide exceptional result practice source performance limitation remain rather poorly understood Using characterlevel language model interpretable testbed aim bridge gap providing analysis representation prediction error type particular experiment reveal existence interpretable cell keep track longrange dependency line length quote bracket Moreover comparative analysis finite horizon ngram model trace source LSTM improvement longrange structural dependency Finally provide analysis remaining error suggests area study Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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['Cheng-Tao Chung', 'Cheng-Yu Tsai', 'Hsiang-Hung Lu', 'Yuan-ming Liou', 'Yen-Chen Wu', 'Yen-Ju Lu', 'Hung-yi Lee', 'Lin-shan Lee']
1506.02327v1
This paper summarizes the work done by the authors for the Zero Resource Speech Challenge organized in the technical program of Interspeech 2015. The goal of the challenge is to discover linguistic units directly from unlabeled speech data. The Multi-layered Acoustic Tokenizer (MAT) proposed in this work automatically discovers multiple sets of acoustic tokens from the given corpus. Each acoustic token set is specified by a set of hyperparameters that describe the model configuration. These sets of acoustic tokens carry different characteristics of the given corpus and the language behind thus can be mutually reinforced. The multiple sets of token labels are then used as the targets of a Multi-target DNN (MDNN) trained on low-level acoustic features. Bottleneck features extracted from the MDNN are used as feedback for the MAT and the MDNN itself. We call this iterative system the Multi-layered Acoustic Tokenizing Deep Neural Network (MAT-DNN) which generates high quality features for track 1 of the challenge and acoustic tokens for track 2 of the challenge.
A Multi-layered Acoustic Tokenizing Deep Neural Network (MAT-DNN) for Unsupervised Discovery of Linguistic Units and Generation of High Quality Features
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http://arxiv.org/pdf/1506.02327v1
Title Multilayered Acoustic Tokenizing Deep Neural Network MATDNN Unsupervised Discovery Linguistic Units Generation High Quality Features Summary paper summarizes work done author Zero Resource Speech Challenge organized technical program Interspeech 2015 goal challenge discover linguistic unit directly unlabeled speech data Multilayered Acoustic Tokenizer MAT proposed work automatically discovers multiple set acoustic token given corpus acoustic token set specified set hyperparameters describe model configuration set acoustic token carry different characteristic given corpus language behind thus mutually reinforced multiple set token label used target Multitarget DNN MDNN trained lowlevel acoustic feature Bottleneck feature extracted MDNN used feedback MAT MDNN call iterative system Multilayered Acoustic Tokenizing Deep Neural Network MATDNN generates high quality feature track 1 challenge acoustic token track 2 challenge Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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580
580
['Douglas Bagnall']
1506.04891v2
Recurrent neural networks (RNNs) are very good at modelling the flow of text, but typically need to be trained on a far larger corpus than is available for the PAN 2015 Author Identification task. This paper describes a novel approach where the output layer of a character-level RNN language model is split into several independent predictive sub-models, each representing an author, while the recurrent layer is shared by all. This allows the recurrent layer to model the language as a whole without over-fitting, while the outputs select aspects of the underlying model that reflect their author's style. The method proves competitive, ranking first in two of the four languages.
Author Identification using Multi-headed Recurrent Neural Networks
2,015
http://arxiv.org/pdf/1506.04891v2
Title Author Identification using Multiheaded Recurrent Neural Networks Summary Recurrent neural network RNNs good modelling flow text typically need trained far larger corpus available PAN 2015 Author Identification task paper describes novel approach output layer characterlevel RNN language model split several independent predictive submodels representing author recurrent layer shared allows recurrent layer model language whole without overfitting output select aspect underlying model reflect author style method prof competitive ranking first two four language Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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581
['Fandong Meng', 'Zhengdong Lu', 'Zhaopeng Tu', 'Hang Li', 'Qun Liu']
1506.06442v4
We propose DEEPMEMORY, a novel deep architecture for sequence-to-sequence learning, which performs the task through a series of nonlinear transformations from the representation of the input sequence (e.g., a Chinese sentence) to the final output sequence (e.g., translation to English). Inspired by the recently proposed Neural Turing Machine (Graves et al., 2014), we store the intermediate representations in stacked layers of memories, and use read-write operations on the memories to realize the nonlinear transformations between the representations. The types of transformations are designed in advance but the parameters are learned from data. Through layer-by-layer transformations, DEEPMEMORY can model complicated relations between sequences necessary for applications such as machine translation between distant languages. The architecture can be trained with normal back-propagation on sequenceto-sequence data, and the learning can be easily scaled up to a large corpus. DEEPMEMORY is broad enough to subsume the state-of-the-art neural translation model in (Bahdanau et al., 2015) as its special case, while significantly improving upon the model with its deeper architecture. Remarkably, DEEPMEMORY, being purely neural network-based, can achieve performance comparable to the traditional phrase-based machine translation system Moses with a small vocabulary and a modest parameter size.
A Deep Memory-based Architecture for Sequence-to-Sequence Learning
2,015
http://arxiv.org/pdf/1506.06442v4
Title Deep Memorybased Architecture SequencetoSequence Learning Summary propose DEEPMEMORY novel deep architecture sequencetosequence learning performs task series nonlinear transformation representation input sequence eg Chinese sentence final output sequence eg translation English Inspired recently proposed Neural Turing Machine Graves et al 2014 store intermediate representation stacked layer memory use readwrite operation memory realize nonlinear transformation representation type transformation designed advance parameter learned data layerbylayer transformation DEEPMEMORY model complicated relation sequence necessary application machine translation distant language architecture trained normal backpropagation sequencetosequence data learning easily scaled large corpus DEEPMEMORY broad enough subsume stateoftheart neural translation model Bahdanau et al 2015 special case significantly improving upon model deeper architecture Remarkably DEEPMEMORY purely neural networkbased achieve performance comparable traditional phrasebased machine translation system Moses small vocabulary modest parameter size Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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582
582
['Ankit Kumar', 'Ozan Irsoy', 'Peter Ondruska', 'Mohit Iyyer', 'James Bradbury', 'Ishaan Gulrajani', 'Victor Zhong', 'Romain Paulus', 'Richard Socher']
1506.07285v5
Most tasks in natural language processing can be cast into question answering (QA) problems over language input. We introduce the dynamic memory network (DMN), a neural network architecture which processes input sequences and questions, forms episodic memories, and generates relevant answers. Questions trigger an iterative attention process which allows the model to condition its attention on the inputs and the result of previous iterations. These results are then reasoned over in a hierarchical recurrent sequence model to generate answers. The DMN can be trained end-to-end and obtains state-of-the-art results on several types of tasks and datasets: question answering (Facebook's bAbI dataset), text classification for sentiment analysis (Stanford Sentiment Treebank) and sequence modeling for part-of-speech tagging (WSJ-PTB). The training for these different tasks relies exclusively on trained word vector representations and input-question-answer triplets.
Ask Me Anything: Dynamic Memory Networks for Natural Language Processing
2,015
http://arxiv.org/pdf/1506.07285v5
Title Ask Anything Dynamic Memory Networks Natural Language Processing Summary task natural language processing cast question answering QA problem language input introduce dynamic memory network DMN neural network architecture process input sequence question form episodic memory generates relevant answer Questions trigger iterative attention process allows model condition attention input result previous iteration result reasoned hierarchical recurrent sequence model generate answer DMN trained endtoend obtains stateoftheart result several type task datasets question answering Facebooks bAbI dataset text classification sentiment analysis Stanford Sentiment Treebank sequence modeling partofspeech tagging WSJPTB training different task relies exclusively trained word vector representation inputquestionanswer triplet Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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583
583
['Lantian Li', 'Yiye Lin', 'Zhiyong Zhang', 'Dong Wang']
1506.08349v1
A deep learning approach has been proposed recently to derive speaker identifies (d-vector) by a deep neural network (DNN). This approach has been applied to text-dependent speaker recognition tasks and shows reasonable performance gains when combined with the conventional i-vector approach. Although promising, the existing d-vector implementation still can not compete with the i-vector baseline. This paper presents two improvements for the deep learning approach: a phonedependent DNN structure to normalize phone variation, and a new scoring approach based on dynamic time warping (DTW). Experiments on a text-dependent speaker recognition task demonstrated that the proposed methods can provide considerable performance improvement over the existing d-vector implementation.
Improved Deep Speaker Feature Learning for Text-Dependent Speaker Recognition
2,015
http://arxiv.org/pdf/1506.08349v1
Title Improved Deep Speaker Feature Learning TextDependent Speaker Recognition Summary deep learning approach proposed recently derive speaker identifies dvector deep neural network DNN approach applied textdependent speaker recognition task show reasonable performance gain combined conventional ivector approach Although promising existing dvector implementation still compete ivector baseline paper present two improvement deep learning approach phonedependent DNN structure normalize phone variation new scoring approach based dynamic time warping DTW Experiments textdependent speaker recognition task demonstrated proposed method provide considerable performance improvement existing dvector implementation Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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584
584
['Nal Kalchbrenner', 'Ivo Danihelka', 'Alex Graves']
1507.01526v3
This paper introduces Grid Long Short-Term Memory, a network of LSTM cells arranged in a multidimensional grid that can be applied to vectors, sequences or higher dimensional data such as images. The network differs from existing deep LSTM architectures in that the cells are connected between network layers as well as along the spatiotemporal dimensions of the data. The network provides a unified way of using LSTM for both deep and sequential computation. We apply the model to algorithmic tasks such as 15-digit integer addition and sequence memorization, where it is able to significantly outperform the standard LSTM. We then give results for two empirical tasks. We find that 2D Grid LSTM achieves 1.47 bits per character on the Wikipedia character prediction benchmark, which is state-of-the-art among neural approaches. In addition, we use the Grid LSTM to define a novel two-dimensional translation model, the Reencoder, and show that it outperforms a phrase-based reference system on a Chinese-to-English translation task.
Grid Long Short-Term Memory
2,015
http://arxiv.org/pdf/1507.01526v3
Title Grid Long ShortTerm Memory Summary paper introduces Grid Long ShortTerm Memory network LSTM cell arranged multidimensional grid applied vector sequence higher dimensional data image network differs existing deep LSTM architecture cell connected network layer well along spatiotemporal dimension data network provides unified way using LSTM deep sequential computation apply model algorithmic task 15digit integer addition sequence memorization able significantly outperform standard LSTM give result two empirical task find 2D Grid LSTM achieves 147 bit per character Wikipedia character prediction benchmark stateoftheart among neural approach addition use Grid LSTM define novel twodimensional translation model Reencoder show outperforms phrasebased reference system ChinesetoEnglish translation task Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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585
585
['Yang Liu', 'Furu Wei', 'Sujian Li', 'Heng Ji', 'Ming Zhou', 'Houfeng Wang']
1507.04646v1
Previous research on relation classification has verified the effectiveness of using dependency shortest paths or subtrees. In this paper, we further explore how to make full use of the combination of these dependency information. We first propose a new structure, termed augmented dependency path (ADP), which is composed of the shortest dependency path between two entities and the subtrees attached to the shortest path. To exploit the semantic representation behind the ADP structure, we develop dependency-based neural networks (DepNN): a recursive neural network designed to model the subtrees, and a convolutional neural network to capture the most important features on the shortest path. Experiments on the SemEval-2010 dataset show that our proposed method achieves state-of-art results.
A Dependency-Based Neural Network for Relation Classification
2,015
http://arxiv.org/pdf/1507.04646v1
Title DependencyBased Neural Network Relation Classification Summary Previous research relation classification verified effectiveness using dependency shortest path subtrees paper explore make full use combination dependency information first propose new structure termed augmented dependency path ADP composed shortest dependency path two entity subtrees attached shortest path exploit semantic representation behind ADP structure develop dependencybased neural network DepNN recursive neural network designed model subtrees convolutional neural network capture important feature shortest path Experiments SemEval2010 dataset show proposed method achieves stateofart result Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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586
586
['Jian Tang', 'Meng Qu', 'Qiaozhu Mei']
1508.00200v1
Unsupervised text embedding methods, such as Skip-gram and Paragraph Vector, have been attracting increasing attention due to their simplicity, scalability, and effectiveness. However, comparing to sophisticated deep learning architectures such as convolutional neural networks, these methods usually yield inferior results when applied to particular machine learning tasks. One possible reason is that these text embedding methods learn the representation of text in a fully unsupervised way, without leveraging the labeled information available for the task. Although the low dimensional representations learned are applicable to many different tasks, they are not particularly tuned for any task. In this paper, we fill this gap by proposing a semi-supervised representation learning method for text data, which we call the \textit{predictive text embedding} (PTE). Predictive text embedding utilizes both labeled and unlabeled data to learn the embedding of text. The labeled information and different levels of word co-occurrence information are first represented as a large-scale heterogeneous text network, which is then embedded into a low dimensional space through a principled and efficient algorithm. This low dimensional embedding not only preserves the semantic closeness of words and documents, but also has a strong predictive power for the particular task. Compared to recent supervised approaches based on convolutional neural networks, predictive text embedding is comparable or more effective, much more efficient, and has fewer parameters to tune.
PTE: Predictive Text Embedding through Large-scale Heterogeneous Text Networks
2,015
http://arxiv.org/pdf/1508.00200v1
Title PTE Predictive Text Embedding Largescale Heterogeneous Text Networks Summary Unsupervised text embedding method Skipgram Paragraph Vector attracting increasing attention due simplicity scalability effectiveness However comparing sophisticated deep learning architecture convolutional neural network method usually yield inferior result applied particular machine learning task One possible reason text embedding method learn representation text fully unsupervised way without leveraging labeled information available task Although low dimensional representation learned applicable many different task particularly tuned task paper fill gap proposing semisupervised representation learning method text data call textitpredictive text embedding PTE Predictive text embedding utilizes labeled unlabeled data learn embedding text labeled information different level word cooccurrence information first represented largescale heterogeneous text network embedded low dimensional space principled efficient algorithm low dimensional embedding preserve semantic closeness word document also strong predictive power particular task Compared recent supervised approach based convolutional neural network predictive text embedding comparable effective much efficient fewer parameter tune Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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587
587
['Dongxu Zhang', 'Dong Wang']
1508.01006v2
Deep learning has gained much success in sentence-level relation classification. For example, convolutional neural networks (CNN) have delivered competitive performance without much effort on feature engineering as the conventional pattern-based methods. Thus a lot of works have been produced based on CNN structures. However, a key issue that has not been well addressed by the CNN-based method is the lack of capability to learn temporal features, especially long-distance dependency between nominal pairs. In this paper, we propose a simple framework based on recurrent neural networks (RNN) and compare it with CNN-based model. To show the limitation of popular used SemEval-2010 Task 8 dataset, we introduce another dataset refined from MIMLRE(Angeli et al., 2014). Experiments on two different datasets strongly indicates that the RNN-based model can deliver better performance on relation classification, and it is particularly capable of learning long-distance relation patterns. This makes it suitable for real-world applications where complicated expressions are often involved.
Relation Classification via Recurrent Neural Network
2,015
http://arxiv.org/pdf/1508.01006v2
Title Relation Classification via Recurrent Neural Network Summary Deep learning gained much success sentencelevel relation classification example convolutional neural network CNN delivered competitive performance without much effort feature engineering conventional patternbased method Thus lot work produced based CNN structure However key issue well addressed CNNbased method lack capability learn temporal feature especially longdistance dependency nominal pair paper propose simple framework based recurrent neural network RNN compare CNNbased model show limitation popular used SemEval2010 Task 8 dataset introduce another dataset refined MIMLREAngeli et al 2014 Experiments two different datasets strongly indicates RNNbased model deliver better performance relation classification particularly capable learning longdistance relation pattern make suitable realworld application complicated expression often involved Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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588
588
['Dongxu Zhang', 'Tianyi Luo', 'Dong Wang', 'Rong Liu']
1508.01011v1
Latent Dirichlet Allocation (LDA) is a three-level hierarchical Bayesian model for topic inference. In spite of its great success, inferring the latent topic distribution with LDA is time-consuming. Motivated by the transfer learning approach proposed by~\newcite{hinton2015distilling}, we present a novel method that uses LDA to supervise the training of a deep neural network (DNN), so that the DNN can approximate the costly LDA inference with less computation. Our experiments on a document classification task show that a simple DNN can learn the LDA behavior pretty well, while the inference is speeded up tens or hundreds of times.
Learning from LDA using Deep Neural Networks
2,015
http://arxiv.org/pdf/1508.01011v1
Title Learning LDA using Deep Neural Networks Summary Latent Dirichlet Allocation LDA threelevel hierarchical Bayesian model topic inference spite great success inferring latent topic distribution LDA timeconsuming Motivated transfer learning approach proposed bynewcitehinton2015distilling present novel method us LDA supervise training deep neural network DNN DNN approximate costly LDA inference le computation experiment document classification task show simple DNN learn LDA behavior pretty well inference speeded ten hundred time Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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589
589
['Marek Rei']
1508.03854v1
We investigate an extension of continuous online learning in recurrent neural network language models. The model keeps a separate vector representation of the current unit of text being processed and adaptively adjusts it after each prediction. The initial experiments give promising results, indicating that the method is able to increase language modelling accuracy, while also decreasing the parameters needed to store the model along with the computation required at each step.
Online Representation Learning in Recurrent Neural Language Models
2,015
http://arxiv.org/pdf/1508.03854v1
Title Online Representation Learning Recurrent Neural Language Models Summary investigate extension continuous online learning recurrent neural network language model model keep separate vector representation current unit text processed adaptively adjusts prediction initial experiment give promising result indicating method able increase language modelling accuracy also decreasing parameter needed store model along computation required step Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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590
590
['Ye Zhang', 'Byron Wallace']
1510.03820v4
Convolutional Neural Networks (CNNs) have recently achieved remarkably strong performance on the practically important task of sentence classification (kim 2014, kalchbrenner 2014, johnson 2014). However, these models require practitioners to specify an exact model architecture and set accompanying hyperparameters, including the filter region size, regularization parameters, and so on. It is currently unknown how sensitive model performance is to changes in these configurations for the task of sentence classification. We thus conduct a sensitivity analysis of one-layer CNNs to explore the effect of architecture components on model performance; our aim is to distinguish between important and comparatively inconsequential design decisions for sentence classification. We focus on one-layer CNNs (to the exclusion of more complex models) due to their comparative simplicity and strong empirical performance, which makes it a modern standard baseline method akin to Support Vector Machine (SVMs) and logistic regression. We derive practical advice from our extensive empirical results for those interested in getting the most out of CNNs for sentence classification in real world settings.
A Sensitivity Analysis of (and Practitioners' Guide to) Convolutional Neural Networks for Sentence Classification
2,015
http://arxiv.org/pdf/1510.03820v4
Title Sensitivity Analysis Practitioners Guide Convolutional Neural Networks Sentence Classification Summary Convolutional Neural Networks CNNs recently achieved remarkably strong performance practically important task sentence classification kim 2014 kalchbrenner 2014 johnson 2014 However model require practitioner specify exact model architecture set accompanying hyperparameters including filter region size regularization parameter currently unknown sensitive model performance change configuration task sentence classification thus conduct sensitivity analysis onelayer CNNs explore effect architecture component model performance aim distinguish important comparatively inconsequential design decision sentence classification focus onelayer CNNs exclusion complex model due comparative simplicity strong empirical performance make modern standard baseline method akin Support Vector Machine SVMs logistic regression derive practical advice extensive empirical result interested getting CNNs sentence classification real world setting Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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591
591
['Yu Zhang', 'Ekapol Chuangsuwanich', 'James Glass', 'Dong Yu']
1510.08985v1
In this paper, we investigate the use of prediction-adaptation-correction recurrent neural networks (PAC-RNNs) for low-resource speech recognition. A PAC-RNN is comprised of a pair of neural networks in which a {\it correction} network uses auxiliary information given by a {\it prediction} network to help estimate the state probability. The information from the correction network is also used by the prediction network in a recurrent loop. Our model outperforms other state-of-the-art neural networks (DNNs, LSTMs) on IARPA-Babel tasks. Moreover, transfer learning from a language that is similar to the target language can help improve performance further.
Prediction-Adaptation-Correction Recurrent Neural Networks for Low-Resource Language Speech Recognition
2,015
http://arxiv.org/pdf/1510.08985v1
Title PredictionAdaptationCorrection Recurrent Neural Networks LowResource Language Speech Recognition Summary paper investigate use predictionadaptationcorrection recurrent neural network PACRNNs lowresource speech recognition PACRNN comprised pair neural network correction network us auxiliary information given prediction network help estimate state probability information correction network also used prediction network recurrent loop model outperforms stateoftheart neural network DNNs LSTMs IARPABabel task Moreover transfer learning language similar target language help improve performance Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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592
592
['Hongyu Guo']
1510.09202v1
We introduce a novel schema for sequence to sequence learning with a Deep Q-Network (DQN), which decodes the output sequence iteratively. The aim here is to enable the decoder to first tackle easier portions of the sequences, and then turn to cope with difficult parts. Specifically, in each iteration, an encoder-decoder Long Short-Term Memory (LSTM) network is employed to, from the input sequence, automatically create features to represent the internal states of and formulate a list of potential actions for the DQN. Take rephrasing a natural sentence as an example. This list can contain ranked potential words. Next, the DQN learns to make decision on which action (e.g., word) will be selected from the list to modify the current decoded sequence. The newly modified output sequence is subsequently used as the input to the DQN for the next decoding iteration. In each iteration, we also bias the reinforcement learning's attention to explore sequence portions which are previously difficult to be decoded. For evaluation, the proposed strategy was trained to decode ten thousands natural sentences. Our experiments indicate that, when compared to a left-to-right greedy beam search LSTM decoder, the proposed method performed competitively well when decoding sentences from the training set, but significantly outperformed the baseline when decoding unseen sentences, in terms of BLEU score obtained.
Generating Text with Deep Reinforcement Learning
2,015
http://arxiv.org/pdf/1510.09202v1
Title Generating Text Deep Reinforcement Learning Summary introduce novel schema sequence sequence learning Deep QNetwork DQN decodes output sequence iteratively aim enable decoder first tackle easier portion sequence turn cope difficult part Specifically iteration encoderdecoder Long ShortTerm Memory LSTM network employed input sequence automatically create feature represent internal state formulate list potential action DQN Take rephrasing natural sentence example list contain ranked potential word Next DQN learns make decision action eg word selected list modify current decoded sequence newly modified output sequence subsequently used input DQN next decoding iteration iteration also bias reinforcement learning attention explore sequence portion previously difficult decoded evaluation proposed strategy trained decode ten thousand natural sentence experiment indicate compared lefttoright greedy beam search LSTM decoder proposed method performed competitively well decoding sentence training set significantly outperformed baseline decoding unseen sentence term BLEU score obtained Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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593
593
['Junyoung Chung', 'Jacob Devlin', 'Hany Hassan Awadalla']
1511.01042v2
In this paper, we explore different neural network architectures that can predict if a speaker of a given utterance is asking a question or making a statement. We com- pare the outcomes of regularization methods that are popularly used to train deep neural networks and study how different context functions can affect the classification performance. We also compare the efficacy of gated activation functions that are favorably used in recurrent neural networks and study how to combine multimodal inputs. We evaluate our models on two multimodal datasets: MSR-Skype and CALLHOME.
Detecting Interrogative Utterances with Recurrent Neural Networks
2,015
http://arxiv.org/pdf/1511.01042v2
Title Detecting Interrogative Utterances Recurrent Neural Networks Summary paper explore different neural network architecture predict speaker given utterance asking question making statement com pare outcome regularization method popularly used train deep neural network study different context function affect classification performance also compare efficacy gated activation function favorably used recurrent neural network study combine multimodal input evaluate model two multimodal datasets MSRSkype CALLHOME Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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594
594
['Navdeep Jaitly', 'David Sussillo', 'Quoc V. Le', 'Oriol Vinyals', 'Ilya Sutskever', 'Samy Bengio']
1511.04868v4
Sequence-to-sequence models have achieved impressive results on various tasks. However, they are unsuitable for tasks that require incremental predictions to be made as more data arrives or tasks that have long input sequences and output sequences. This is because they generate an output sequence conditioned on an entire input sequence. In this paper, we present a Neural Transducer that can make incremental predictions as more input arrives, without redoing the entire computation. Unlike sequence-to-sequence models, the Neural Transducer computes the next-step distribution conditioned on the partially observed input sequence and the partially generated sequence. At each time step, the transducer can decide to emit zero to many output symbols. The data can be processed using an encoder and presented as input to the transducer. The discrete decision to emit a symbol at every time step makes it difficult to learn with conventional backpropagation. It is however possible to train the transducer by using a dynamic programming algorithm to generate target discrete decisions. Our experiments show that the Neural Transducer works well in settings where it is required to produce output predictions as data come in. We also find that the Neural Transducer performs well for long sequences even when attention mechanisms are not used.
A Neural Transducer
2,015
http://arxiv.org/pdf/1511.04868v4
Title Neural Transducer Summary Sequencetosequence model achieved impressive result various task However unsuitable task require incremental prediction made data arrives task long input sequence output sequence generate output sequence conditioned entire input sequence paper present Neural Transducer make incremental prediction input arrives without redoing entire computation Unlike sequencetosequence model Neural Transducer computes nextstep distribution conditioned partially observed input sequence partially generated sequence time step transducer decide emit zero many output symbol data processed using encoder presented input transducer discrete decision emit symbol every time step make difficult learn conventional backpropagation however possible train transducer using dynamic programming algorithm generate target discrete decision experiment show Neural Transducer work well setting required produce output prediction data come also find Neural Transducer performs well long sequence even attention mechanism used Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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595
595
['Ethan Caballero']
1511.06420v2
Question Answering (QA) is fundamental to natural language processing in that most nlp problems can be phrased as QA (Kumar et al., 2015). Current weakly supervised memory network models that have been proposed so far struggle at answering questions that involve relations among multiple entities (such as facebook's bAbi qa5-three-arg-relations in (Weston et al., 2015)). To address this problem of learning multi-argument multi-hop semantic relations for the purpose of QA, we propose a method that combines the jointly learned long-term read-write memory and attentive inference components of end-to-end memory networks (MemN2N) (Sukhbaatar et al., 2015) with distributed sentence vector representations encoded by a Skip-Thought model (Kiros et al., 2015). This choice to append Skip-Thought Vectors to the existing MemN2N framework is motivated by the fact that Skip-Thought Vectors have been shown to accurately model multi-argument semantic relations (Kiros et al., 2015).
Skip-Thought Memory Networks
2,015
http://arxiv.org/pdf/1511.06420v2
Title SkipThought Memory Networks Summary Question Answering QA fundamental natural language processing nlp problem phrased QA Kumar et al 2015 Current weakly supervised memory network model proposed far struggle answering question involve relation among multiple entity facebooks bAbi qa5threeargrelations Weston et al 2015 address problem learning multiargument multihop semantic relation purpose QA propose method combine jointly learned longterm readwrite memory attentive inference component endtoend memory network MemN2N Sukhbaatar et al 2015 distributed sentence vector representation encoded SkipThought model Kiros et al 2015 choice append SkipThought Vectors existing MemN2N framework motivated fact SkipThought Vectors shown accurately model multiargument semantic relation Kiros et al 2015 Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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596
596
['Jason P. C. Chiu', 'Eric Nichols']
1511.08308v5
Named entity recognition is a challenging task that has traditionally required large amounts of knowledge in the form of feature engineering and lexicons to achieve high performance. In this paper, we present a novel neural network architecture that automatically detects word- and character-level features using a hybrid bidirectional LSTM and CNN architecture, eliminating the need for most feature engineering. We also propose a novel method of encoding partial lexicon matches in neural networks and compare it to existing approaches. Extensive evaluation shows that, given only tokenized text and publicly available word embeddings, our system is competitive on the CoNLL-2003 dataset and surpasses the previously reported state of the art performance on the OntoNotes 5.0 dataset by 2.13 F1 points. By using two lexicons constructed from publicly-available sources, we establish new state of the art performance with an F1 score of 91.62 on CoNLL-2003 and 86.28 on OntoNotes, surpassing systems that employ heavy feature engineering, proprietary lexicons, and rich entity linking information.
Named Entity Recognition with Bidirectional LSTM-CNNs
2,015
http://arxiv.org/pdf/1511.08308v5
Title Named Entity Recognition Bidirectional LSTMCNNs Summary Named entity recognition challenging task traditionally required large amount knowledge form feature engineering lexicon achieve high performance paper present novel neural network architecture automatically detects word characterlevel feature using hybrid bidirectional LSTM CNN architecture eliminating need feature engineering also propose novel method encoding partial lexicon match neural network compare existing approach Extensive evaluation show given tokenized text publicly available word embeddings system competitive CoNLL2003 dataset surpasses previously reported state art performance OntoNotes 50 dataset 213 F1 point using two lexicon constructed publiclyavailable source establish new state art performance F1 score 9162 CoNLL2003 8628 OntoNotes surpassing system employ heavy feature engineering proprietary lexicon rich entity linking information Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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597
597
['Konstantin Lopyrev']
1512.01712v1
We describe an application of an encoder-decoder recurrent neural network with LSTM units and attention to generating headlines from the text of news articles. We find that the model is quite effective at concisely paraphrasing news articles. Furthermore, we study how the neural network decides which input words to pay attention to, and specifically we identify the function of the different neurons in a simplified attention mechanism. Interestingly, our simplified attention mechanism performs better that the more complex attention mechanism on a held out set of articles.
Generating News Headlines with Recurrent Neural Networks
2,015
http://arxiv.org/pdf/1512.01712v1
Title Generating News Headlines Recurrent Neural Networks Summary describe application encoderdecoder recurrent neural network LSTM unit attention generating headline text news article find model quite effective concisely paraphrasing news article Furthermore study neural network decides input word pay attention specifically identify function different neuron simplified attention mechanism Interestingly simplified attention mechanism performs better complex attention mechanism held set article Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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598
598
['Pranjal Singh', 'Amitabha Mukerjee']
1512.03549v1
Despite the success of distributional semantics, composing phrases from word vectors remains an important challenge. Several methods have been tried for benchmark tasks such as sentiment classification, including word vector averaging, matrix-vector approaches based on parsing, and on-the-fly learning of paragraph vectors. Most models usually omit stop words from the composition. Instead of such an yes-no decision, we consider several graded schemes where words are weighted according to their discriminatory relevance with respect to its use in the document (e.g., idf). Some of these methods (particularly tf-idf) are seen to result in a significant improvement in performance over prior state of the art. Further, combining such approaches into an ensemble based on alternate classifiers such as the RNN model, results in an 1.6% performance improvement on the standard IMDB movie review dataset, and a 7.01% improvement on Amazon product reviews. Since these are language free models and can be obtained in an unsupervised manner, they are of interest also for under-resourced languages such as Hindi as well and many more languages. We demonstrate the language free aspects by showing a gain of 12% for two review datasets over earlier results, and also release a new larger dataset for future testing (Singh,2015).
Words are not Equal: Graded Weighting Model for building Composite Document Vectors
2,015
http://arxiv.org/pdf/1512.03549v1
Title Words Equal Graded Weighting Model building Composite Document Vectors Summary Despite success distributional semantics composing phrase word vector remains important challenge Several method tried benchmark task sentiment classification including word vector averaging matrixvector approach based parsing onthefly learning paragraph vector model usually omit stop word composition Instead yesno decision consider several graded scheme word weighted according discriminatory relevance respect use document eg idf method particularly tfidf seen result significant improvement performance prior state art combining approach ensemble based alternate classifier RNN model result 16 performance improvement standard IMDB movie review dataset 701 improvement Amazon product review Since language free model obtained unsupervised manner interest also underresourced language Hindi well many language demonstrate language free aspect showing gain 12 two review datasets earlier result also release new larger dataset future testing Singh2015 Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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599
599
['Liang Lu', 'Steve Renals']
1512.04280v4
For speech recognition, deep neural networks (DNNs) have significantly improved the recognition accuracy in most of benchmark datasets and application domains. However, compared to the conventional Gaussian mixture models, DNN-based acoustic models usually have much larger number of model parameters, making it challenging for their applications in resource constrained platforms, e.g., mobile devices. In this paper, we study the application of the recently proposed highway network to train small-footprint DNNs, which are {\it thinner} and {\it deeper}, and have significantly smaller number of model parameters compared to conventional DNNs. We investigated this approach on the AMI meeting speech transcription corpus which has around 70 hours of audio data. The highway neural networks constantly outperformed their plain DNN counterparts, and the number of model parameters can be reduced significantly without sacrificing the recognition accuracy.
Small-footprint Deep Neural Networks with Highway Connections for Speech Recognition
2,015
http://arxiv.org/pdf/1512.04280v4
Title Smallfootprint Deep Neural Networks Highway Connections Speech Recognition Summary speech recognition deep neural network DNNs significantly improved recognition accuracy benchmark datasets application domain However compared conventional Gaussian mixture model DNNbased acoustic model usually much larger number model parameter making challenging application resource constrained platform eg mobile device paper study application recently proposed highway network train smallfootprint DNNs thinner deeper significantly smaller number model parameter compared conventional DNNs investigated approach AMI meeting speech transcription corpus around 70 hour audio data highway neural network constantly outperformed plain DNN counterpart number model parameter reduced significantly without sacrificing recognition accuracy Authors 0 Ahmed Osman Wojciech Samek 1 Ji Young Lee Franck Dernoncourt 2 Iulian Vlad Serban Tim Klinger Gerald Tesau 3 Sebastian Ruder Joachim Bingel Isabelle Aug 4 Iulian V Serban Chinnadhurai Sankar Mathie 40995 Vitaly Feldman Pravesh Kothari Jan Vondrák 40996 Orly Avner Shie Mannor 40997 Ran Zhao Deanna Needell Christopher Johanse 40998 Zongyan Huang Matthew England David Wilson 40999 Imen Trabelsi Dorra Ben Ayed Name author Length 41000 dtype object
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