ppxscal/embedding_network huggingface dataset:
Capacity bounds of MIMO channels with asymmetric channel state information at transmitter
Authors: An Liu, Xinming Huang, Youjian Liu, Haige Xiang, Wu Luo
Venue: IEEE Communications Letters (2009)

Using two receive antennas at a mobile phone improves downlink performance. But because of the correlation of the two antennas, using one of them to transmit in the uplink is a good performance-complexity tradeoff. This creates an interesting scenario of asymmetric channel state information at the transmitter in a time division duplex system, where the downlink channel coefficients related to one of the two receive antennas can be learned by the base station from the uplink training due to reciprocity. We provide near optimal transmitter design by obtaining upper and lower bounds of the downlink ergodic capacity.
Analysis of the spur characteristics of edge-combining DLL-based frequency multipliers
Authors: Owen Casha, lvan Grech, Franck Badets, Dominique Morche, Joseph Micallef
Venue: IEEE Transactions on Circuits and Systems II: Express Briefs (2009)

A complete analysis of the spur characteristics of edge-combining delay-locked loop (DLL)-based frequency multipliers is presented in this brief. The novelty of this analysis is the fact that it can be used to estimate the effect of both the in-lock error and the delay-stage mismatch on the spurious level of the frequency multiplier with low computational complexity. In addition, a way to reduce the mismatch between the delay cells in the delay line is discussed via an analytic model and verified by the implementation of a delay cell in a 65-nm CMOS process.
Audio-visual training in children with reading disabilities
Authors: Annie Magnan, Jean Ecalle
Venue: Computers Education (2006)

This study tested the effectiveness of audio-visual training in the discrimination of the phonetic feature of voicing on the recognition of written words by young children deemed to at risk of dyslexia (experiment 1) as well as on dyslexic children's phonological skills (experiment 2). In addition, the third experiment studied the effectiveness of this word recognition training in dyslexic children who regularly used a computer at home. A traditional pre-test, training, post-test design including comparison groups (experimental vs. control) provided a base-line for assessing the training effects. In the three experiments the intervention group showed higher increases performances in phonological skills and phonological recoding than the control group did. Beyond providing evidence for the effectiveness of this audio-visual training, these results contribute to an understanding of the nature of reading difficulties and successful training. Globally, the results show the impact of the audio-visual training about voicing on performances of reading-disabled children. A such type of training leads children to connect print and phonology. Phonological representations could be specified by training which involves both phonological and orthographic units. The mapping between these two units could be easier in a computerized remedial program.
Data Privacy Preserving Mechanism Based on Tenant Customization for SaaS
Authors: Kun Zhang, Yuliang Shi, Qingzhong Li, Ji Bian
Venue: Proceedings of the 2009 International Conference on Multimedia Information Networking and Security - Volume 01 (2009)

As a newly software delivery model, Software as a Service, SaaS for short, is the best way for small and medium enterprise to adopt the newly technology. However trustworthiness is greatest challenge in the wide acceptance of SaaS. In the absence of trustworthiness in SaaS applications, data privacy is the primary and the most important issue for tenants. How to protect the data privacy when software service and database are both hosted at the service provider's client is still an open issue. So based on the customization feature of SaaS applications and shared database shared schema storage model, this paper demonstrates the shared data storage model, defines three kinds of privacy constraints, and then proposes a customizable privacy constraints based approach for data privacy preserving by combing data encryption and information disassociation. This approach is proofed correctly and could be used for privacy preserving in SaaS applications in static scenarios.
A fully-anisotropic Morlet wavelet to identify dominant orientations in a porous medium
Authors: Roseanna M. Neupauer, Kaye L. Powell
Venue: Computers Geosciences (2005)

Wavelet analysis can be used to extract local information from a signal or random field. We introduce a new fully-anisotropic Morlet wavelet to identify dominant orientations in anisotropic random fields. The standard Morlet wavelet is a complex-valued wavelet that has directionally-dependent real and imaginary parts but is isotropic in magnitude. Our new fully-anisotropic Morlet wavelet is anisotropic in its real and imaginary parts and also in its magnitude. We use this wavelet to identify dominant orientations in the permeability field of a 1mx1m block of Massillon sandstone. We show that this fully-anisotropic Morlet wavelet is more effective than the standard Morlet wavelet at identifying dominant orientations in two-dimensional anisotropic random fields.
Reversible watermarking for knowledge digest embedding and reliability control in medical images
Authors: Gouenou Coatrieux, Clara Le Guillou, Jean-Michel Cauvin, Christian Roux
Venue: IEEE Transactions on Information Technology in Biomedicine (2009)

To improve medical image sharing in applications such as e-learning or remote diagnosis aid, we propose to make the image more usable by watermarking it with a digest of its associated knowledge. The aim of such a knowledge digest (KD) is for it to be used for retrieving similar images with either the same findings or differential diagnoses. It summarizes the symbolic descriptions of the image, the symbolic descriptions of the findings semiology, and the similarity rules that contribute to balancing the importance of previous descriptors when comparing images. Instead of modifying the image file format by adding some extra header information, watermarking is used to embed the KD in the pixel gray-level values of the corresponding images. When shared through open networks, watermarking also helps to convey reliability proofs (integrity and authenticity) of an image and its KD. The interest of these new image functionalities is illustrated in the updating of the distributed users' databases within the framework of an e-learning application demonstrator of endoscopic semiology.
Study of Speed Governing Control System for Switched Reluctance Motor Based on Iterative Learning Control
Authors: Yan Dong, Jie Hao, Yi Zheng
Venue: Proceedings of the 2009 Second International Conference on Intelligent Networks and Intelligent Systems (2009)

Introduce Switched Reluctance Motor Speed Control System and Operation Control.. Because of the need to drag the large inertia loads, So that instability in the braking process. Therefore analysis the basis of characteristics of SRD and control, proposed that we used iterative learning algorithm to control the current method, composed of dual Closed-loop control system. And MATLAB simulation for Switched Reluctance Drive, we reach an ideal control. So we can use Iterative Learning Control theory to improve large inertia load system. There are a lot of theoretical and practical significance.
Capacity planning with capability for multiple semiconductor manufacturing fabs
Authors: James C. Chen, Chia-Wen Chen, C. Joe Lin, Hsin Rau
Venue: Computers and Industrial Engineering (2005)

A capacity planning system (CPS) that considers the capacity and capability of equipment is developed for multiple semiconductor manufacturing fabs. On the basis of pull philosophy and the assumption of infinite equipment capacity, the system determines each lot's release time, start fab, and the capability of the equipment. CPS includes three main modules-the WIP-Pulling Module (WPM), the Workload Accumulation Module (WAM) and the Wafer Release Module (WRM). WPM pulls WIP from the end of the process route to meet the master production schedule (MPS). WAM then calculates the expected equipment loading in different time buckets. If WIP cannot meet the MPS requirement, then for each lot to be released, WRM evaluates the expected loading of many fabs, based on the lot's planned start time, and then determines the lot release time, the start fab and the equipment capability, to optimize the workload balance among all fabs. Simulation results indicate the effectiveness and efficiency of this system. A CPS that combines Adjusted Release Time (ART) and Path Load performs best in terms of three performance measures. This finding shows that CPS based on the combination of ART and Path Load can efficiently balance the equipment workload among the various fabs, on various days, and across various equipment at various levels of demands.
A Framework of CBIR System Based on Relevance Feedback
Authors: Jianjiang Lu, Zhenghui Xie, Ran Li, Yafei Zhang, Jiabao Wang
Venue: Proceedings of the 2009 Third International Symposium on Intelligent Information Technology Application - Volume 01 (2009)

Content-based image retrieval (CBIR) is an effective approach for obtaining desired image, however, due to the semantic gap between low-level visual features and high-level concept of image, CBIR system of state-of-the-art always can’t achieve satisfying retrieval performance. In this paper, we propose a novel CBIR system framework. In order to bridge the semantic gap, the mechanism of relevance feedback is involved in the system. More various features are included at low level, which can provide more abundant image content description. A bi-coded chromosome based genetic algorithm is performed to obtain optimal features and relevant optimal weights based on users’ relevance feedback. With the optimal feature set and optimal weights, the similarity between image in original searching results and query image is considered to be the main factor of rank score.
Steganalysis of YASS
Authors: Bin Li, Jiwu Huang, Yun Qing Shi
Venue: IEEE Transactions on Information Forensics and Security (2009)

A promising steganographic method--Yet Another Steganography Scheme (YASS)--was designed to resist blind steganalysis via embedding data in randomized locations. In addition to a concrete realization which is named the YASS algorithm in this paper, a few strategies were proposed to work with the YASS algorithm in order to enhance the data embedding rate and security. In this work, the YASS algorithm and these strategies, together referred to as YASS, have been analyzed from a warden's perspective. It is observed that the embedding locations chosen by YASS are not randomized enough and the YASS embedding scheme causes detectable artifacts. We present a steganalytic method to attack the YASS algorithm, which is facilitated by a specifically selected steganalytic observation domain (SO-domain), a term to define the domain from which steganalytic features are extracted. The proposed SO-domain is not exactly, but partially accesses, the domain where the YASS algorithm embeds data. Statistical features generated from the SO-domain have demonstrated high effectiveness in detecting the YASS algorithm and identifying some embedding parameters. In addition, we discuss how to defeat the above-mentioned strategies of YASS and demonstrate a countermeasure to a new case in which the randomness of the embedding locations is enhanced. The success of detecting YASS by the proposed method indicates a properly selected SO-domain is beneficial for steganalysis and confirms that the embedding locations are of great importance in designing a secure steganographic scheme.
Biometric Based Watermarking in Audio Signals
Authors: Malay Kishore Dutta, Phalguni Gupta, Vinay K. Pathak
Venue: Proceedings of the 2009 International Conference on Multimedia Information Networking and Security - Volume 01 (2009)

The issue of ownership of digital watermark is addressed in this paper. An audio watermarking scheme is presented where the biometric pattern of iris is used to generate the watermark that has a stamp of ownership. The watermark is embedded in the high-energy regions selectively, which makes the embedding process robust against cropping and synchronization attacks. Experimental results of listening evaluation and robustness tests have confirmed that the proposed scheme maintains good perceptual property and offers strong resistance to typical signal processing attacks.
DLP Based Proxy Blind Signature Scheme with Low-Computation
Authors: Aung Nway Oo, Ni Lar Thein
Venue: Proceedings of the 2009 Fifth International Joint Conference on INC, IMS and IDC (2009)

Proxy blind signature which combines the properties of both proxy signature and blind signature. In a proxy blind signature scheme, the proxy signer is allowed to generate a blind signature on behalf of the original signer. The proxy blind signature scheme is useful in several applications such as e-voting, e-payment and mobile agent environments. In thispaper, we present an efficient proxy blind signature scheme based on discrete logarithm problem, which satisfies the secure properties of both the blind signature scheme and the proxy signature scheme with low computation. Analysisshows that our scheme is secure and efficient.
A new method for speeding up ray tracing NURBS surfaces
Authors: Kaihuai Qin, Minglun Gong, Youjiang Guan, Wenping Wang
Venue: Computers and Graphics (1997)

In this paper, a new method for computing the intersection of a ray and a NURBS surface is presented. The method is based on Newton iteration for a system of nonlinear equations, but its convergence is accelerated by using the polynomial extrapolation. Additionally, a ray is defined to be the intersection of two planes, which are usually non-orthogonal, so that theoperations are significantly reduced. A trapezoid prism is adopted for the bounding box enclosing the patch as tightly as possible. It can be used both for getting a good start point for the Newton iteration and for efficiently detecting whether a ray intersects a patch. The method proposed for speeding up ray tracing NURBS surfaces can reduce both the iteration steps and arithmetic operations, thus much CPU time is saved. The new method is faster than the previous methods for which published performance data allow reliable comparison. The acceleration techniques with extrapolation presented for solution to a system of nonlinear equations can also be used to speed up tracing the intersection of two parametric surfaces as well as others that need Newton iteration.
A memetic algorithm for optimal dynamic design of wireless sensor networks
Authors: Konstantinos P. Ferentinos, Theodore A. Tsiligiridis
Venue: Computer Communications (2010)

We present a memetic algorithm that dynamically optimizes the design of a wireless sensor network towards energy conservation and extension of the life span of the network, taking into consideration application-specific requirements, communication constraints and energy consumption of operation and communication tasks of the sensors. The memetic algorithm modifies an already successful genetic algorithm design system and manages to improve its performance. The obtained optimal sensor network designs satisfy all application-specific requirements, fulfill the existing connectivity constraints and incorporate energy conservation characteristics stronger than those of the original genetic algorithm system. Energy management is optimized to guarantee maximum life span of the network without lack of the network characteristics that are required by the specific sensing application.
A multi-core based parallel streaming mechanism for concurrent video-on-demand applications
Authors: Chung-Ming Huang, Chung-Wei Lin, Wan-Ping Tsai
Venue: IEEE Communications Letters (2009)

In this paper, we design a novel Multi-Core based Parallel Streaming Mechanism for concurrently streaming the scalable extension of H.264/AVC videos, which is called MC-PSM. MC-PSM is able to serve lots of heterogeneous users who may utilize distinct terminals through distinct network interfaces to get on-demand videos from an ISP streaming server at meanwhile. With the concept of CPU scheduling- SJF (Shortest-Job-First) and multi-core based parallel programming, multiple streaming tasks can be executed in parallel using a proposed task dispatcher based on network connection speeds, video bit-rate and users' waiting time. Comparing with a normal-threading streaming approach, the average execution time can decrease effectively and CPU resources can be utilized more fully.
Adaptive-bandwidth phase-locked loop with continuous background frequency calibration
Authors: Jaeha Kim
Venue: IEEE Transactions on Circuits and Systems II: Express Briefs (2009)

This brief presents an adaptive-bandwidth (BW) phase-locked loop (PLL) that retains the optimal jitter performance over a wide frequency range via continuous background frequency calibration. The effective center frequency of the voltage-controlled oscillator (VCO) is calibrated by adjusting the feedforward division factor while a dual-PLL architecture hides the switching transients. As a result, the core ring oscillator only needs to operate over a narrow frequency range of 2: 1 that is optimal for the jitter, supply sensitivity, and charge pump current mismatch over process, voltage, and temperature (PVT) conditions. The prototype PLL was fabricated in a 0.13-µm CMOS process, consumed 36 mW of power, and occupied 1.1 × 0.46 mm2 of area. The measured root-mean-square (RMS) tracking jitter was less than 0.2% of the reference clock period for the wide range of output frequency (2 MHz-1 GHz) and multiplication factor (20-9), which supports that the PLL BW scales adaptively with the reference frequency. Compared to a PLL without frequency calibration, the proposed PLL demonstrated the jitter reduction upto 80%.
Packet error statistics of LOS broadband fixed wireless access channels
Authors: Athanasios E. Drougas, Athanasios D. Panagopoulos, Panayotis G. Cottis
Venue: IEEE Transactions on Communications (2009)

In broadband fixed wireless access (BFWA) networks mainly operating above 20 GHz, a clear line-of-sight (LOS) path is necessary between the base stations (BS) and the subscribers (S). In this letter, a Markov-based method to estimate the packet loss rate (PLR) statistical characteristics over a dynamically, due to propagation, varying LOS BFWA channel is presented. The method is verified by means of information theoretic metrics and tested against simulation results.
The Design of Web Information Automatic Retrieval System Based on Multi-agent
Authors: Qu Jubao, Liu Sheng, Ye Qiusun
Venue: Proceedings of the 2009 International Conference on Multimedia Information Networking and Security - Volume 02 (2009)

This paper briefly introduces the concept and status quo of the information retrieving technique, Proposes an automatic Web information retrieving system based on Multi-agent. This system analyzes its model architecture and work principle, gives solution to critical problems, leads Support Vector Machine(SVM) into intelligent filter subsystem, therefore to realize intelligent classifying and retrieving information on the Web efficiently. Experiment results prove that this system can improve recall ratio and precision ratio effectively and then attain a satisfying personal retrieving effect.
Implementing Electronic Medical Record Systems
Authors: William MacKinnon, Michael Wasserman
Venue: IT Professional (2009)

The US government is set to invest $19 billion in incentive grants to support meaningful use of electronic medical record (EMR) systems. EMR systems can give healthcare administrators and clinicians the information necessary to improve patient care and lower costs. The authors identify critical success factors for EMR systems implementation by treating them as a type of enterprise resource planning (ERP) system. They address EMR implementation issues by drawing on theory and empirical research from both the healthcare information systems and ERP literatures and qualitatively test their model for implementation success.
Features extraction and analysis for classifying causable patterns in control charts
Authors: Khaled Assaleh, Yousef Al-assaf
Venue: Computers and Industrial Engineering (2005)

Obtaining adequate features is a critical step in classifying causable patterns in control charts. Various methods were developed to extract features that maximize the inter-class variability while minimizing the intra-class variations. Most of these methods are based on either time or frequency domain analysis. As a multi-resolution analysis approach, wavelet transform was considered to exploit the joint time-frequency characteristics of the patterns. However, the effectiveness of the features obtained by multi-resolution wavelet analysis (MRWA) suffers from the frequency leakage among the different spectral bands. This phenomenon is inherent in wavelet analysis regardless of the choice of the mother wavelet. Cross-band frequency leakage smears the band-specific information, which may yield less distinguishing features, especially for short-time observation patterns. In this work we introduce a multi-resolution analysis approach based on discrete cosine transform (DCT) that overcomes the problems associated with MRWA. We also verify that the classification rates of shift, trend, and cyclic causable patterns using multi-resolution DCT (MRDCT) features are higher than those obtained using MRWA features. Furthermore, the computational requirements for MRDCT are notably less than those needed for MRWA. Artificial neural network (ANN) classifier was used with both feature extraction methods.
Experimental and theoretical study on the symmetries of orthogonally polarized optical signals
Authors: William Shieh, Rongqing Hui, Xingwen Yi, Graeme Pendock
Venue: IEEE Transactions on Communications (2009)

We perform theoretical analysis and systematic measurement of the degree-of-polarization and eye-closure penalty for optical signals with orthogonal polarizations. Both the theory and experiment show that the symmetry of the DOP is maintained for the orthogonal polarizations under both first and higher-order PMD, whereas the symmetry of eye-closure penalty is broken under second-order PMD. As a result, an orthogonal polarization pair can have large disparity of eye-closure penalty despite an identical degree-of-polarization. We also demonstrate a novel approach to estimate the maximum eye-closure penalty asymmetry with three orthogonal polarizations on the Poincare Sphere.
End-to-end versus hop-by-hop state refresh in soft state signaling protocols
Authors: Jianhua He, Xiaoming Fu, Zuoyin Tang, Hsiao-Hwa Chen
Venue: IEEE Communications Letters (2009)

The concept of soft state (i.e., the state that will expire unless been refreshed) has been widely used in the design of network signaling protocols. The approaches of refreshing state in multi-hop networks can be classified to end-to-end (E2E) and hop-by-hop (HbH) refreshes. In this article we propose an effective Markov chain based analytical model for both E2E and HbH refresh approaches. Simulations verify the analytical models, which can be used to study the impacts of link characteristics on the performance (e.g., state synchronization and message overhead), as a guide on configuration and optimization of soft state signaling protocols.