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No Regrets: Investigating and Improving Regret Approximations for Curriculum Discovery
https://openreview.net/forum?id=iEeiZlTbts
[ "Alexander Rutherford", "Michael Beukman", "Timon Willi", "Bruno Lacerda", "Nick Hawes", "Jakob Nicolaus Foerster" ]
Poster
reinforcement_learning
What data or environments to use for training to improve downstream performance is a longstanding and very topical question in reinforcement learning. In particular, Unsupervised Environment Design (UED) methods have gained recent attention as their adaptive curricula promise to enable agents to be robust to in- and o...
[ "MARL", "UED", "Robotics" ]
An improved score function for unsupervised environment design in binary outcome settings, which we use to train agents for real-world tasks, and an improved adversarial evaluation protocol that assesses policy robustness.
21,766
2408.15099
title_snapshot
[ -0.011210364289581776, -0.045384109020233154, -0.00723948422819376, 0.0522133931517601, 0.05524815246462822, 0.028261512517929077, 0.018843874335289, -0.0023650138173252344, -0.00020760353072546422, -0.042588092386722565, -0.050922758877277374, 0.04427992179989815, -0.04910656809806824, -0...
Autoregressive Image Diffusion: Generation of Image Sequence and Application in MRI
https://openreview.net/forum?id=jIh4W7r0rn
[ "Guanxiong Luo", "Shoujin Huang", "Martin Uecker" ]
Poster
machine_learning_for_healthcare
Magnetic resonance imaging (MRI) is a widely used non-invasive imaging modality. However, a persistent challenge lies in balancing image quality with imaging speed. This trade-off is primarily constrained by k-space measurements, which traverse specific trajectories in the spatial Fourier domain (k-space). These measu...
[ "Autoregressive models", "Diffusion models", "Inverse problems", "Medical imaging", "MRI" ]
null
21,747
2405.14327
title_snapshot
[ -0.004525674972683191, -0.004820038564503193, -0.009375137276947498, 0.04703538119792938, 0.04252992197871208, 0.03508898243308067, 0.049210645258426666, 0.006557699758559465, -0.010362469591200352, -0.07843168079853058, 0.020184066146612167, -0.038461748510599136, -0.033746685832738876, 0...
The Implicit Bias of Gradient Descent on Separable Multiclass Data
https://openreview.net/forum?id=JlWn80mTJi
[ "Hrithik Ravi", "Clayton Scott", "Daniel Soudry", "Yutong Wang" ]
Poster
learning_theory
Implicit bias describes the phenomenon where optimization-based training algorithms, without explicit regularization, show a preference for simple estimators even when more complex estimators have equal objective values. Multiple works have developed the theory of implicit bias for binary classification under the assum...
[ "gradient descent", "multiclass classification", "hard-margin SVM", "implicit bias" ]
We prove implicit bias of gradient descent for linearly separable multiclass problems.
21,665
2411.01350
title_snapshot
[ -0.01362928468734026, -0.006378329358994961, -0.0040938518941402435, 0.031356338411569595, 0.0021120691671967506, 0.01816076971590519, 0.03348998352885246, -0.007958490401506424, -0.0124782994389534, -0.0433724969625473, -0.010930771939456463, 0.020448431372642517, -0.08164489269256592, -0...
How many classifiers do we need?
https://openreview.net/forum?id=m5dyKArVn8
[ "Hyunsuk Kim", "Liam Hodgkinson", "Ryan Theisen", "Michael W. Mahoney" ]
Poster
learning_theory
As performance gains through scaling data and/or model size experience diminishing returns, it is becoming increasingly popular to turn to ensembling, where the predictions of multiple models are combined to improve accuracy. In this paper, we provide a detailed analysis of how the disagreement and the polarization (a...
[ "ensemble", "model aggregation", "machine learning", "computer vision" ]
We develop bounds on the majority vote error that are tight enough to predict ensemble performance.
21,653
2411.00328
title_snapshot
[ -0.01323518343269825, -0.03446738421916962, -0.008921273052692413, 0.030814774334430695, -0.0011137420078739524, 0.016624102368950844, 0.02634459361433983, -0.02316446043550968, -0.053663723170757294, -0.02813912183046341, -0.014626038260757923, 0.00039368460420519114, -0.08206860721111298, ...
Learning to Reason via Program Generation, Emulation, and Search
https://openreview.net/forum?id=te6VagJf6G
[ "Nathaniel Weir", "Muhammad Khalifa", "Linlu Qiu", "Orion Weller", "Peter Clark" ]
Poster
natural_language_processing
Program synthesis with language models (LMs) has unlocked a large set of reasoning abilities; code-tuned LMs have proven adept at generating programs that solve a wide variety of algorithmic symbolic manipulation tasks (e.g. word concatenation). However, not all reasoning tasks are easily expressible as code, e.g. task...
[ "language models", "instruction tuning", "code generation", "reasoning", "program search", "program emulation" ]
We show that fine-tuning LMs to generate and then emulate the execution of programs creates models can learn new tasks via program search.
21,651
2405.16337
title_snapshot
[ -0.016291432082653046, -0.014608461409807205, -0.046342119574546814, 0.03480838984251022, 0.06110350415110588, 0.029587650671601295, 0.02509952522814274, 0.025929495692253113, -0.013543663546442986, -0.015995582565665245, -0.029490532353520393, 0.056295763701200485, -0.06960318982601166, -...
Beyond the Doors of Perception: Vision Transformers Represent Relations Between Objects
https://openreview.net/forum?id=8puv3c9CPg
[ "Michael A. Lepori", "Alexa R. Tartaglini", "Wai Keen Vong", "Thomas Serre", "Brenden Lake", "Ellie Pavlick" ]
Poster
interpretability_and_explainability
Though vision transformers (ViTs) have achieved state-of-the-art performance in a variety of settings, they exhibit surprising failures when performing tasks involving visual relations. This begs the question: how do ViTs attempt to perform tasks that require computing visual relations between objects? Prior efforts to...
[ "visual reasoning", "mechanistic interpretability", "transformers", "cognitive science" ]
We use methods from mechanistic interpretability to investigate how Vision Transformers perform an abstract visual reasoning task.
21,637
2406.15955
title_snapshot
[ -0.0029021932277828455, 0.019692862406373024, 0.019202103838324547, 0.0384954959154129, 0.013660081662237644, 0.004873357247561216, 0.029448023065924644, 0.01677437499165535, -0.028400275856256485, -0.02822250872850418, -0.05094936862587929, 0.05759909376502037, -0.06957262754440308, 0.012...
FactorizePhys: Matrix Factorization for Multidimensional Attention in Remote Physiological Sensing
https://openreview.net/forum?id=qrfp4eeZ47
[ "Jitesh Joshi", "Sos Agaian", "Youngjun Cho" ]
Poster
deep_learning_architectures
Remote photoplethysmography (rPPG) enables non-invasive extraction of blood volume pulse signals through imaging, transforming spatial-temporal data into time series signals. Advances in end-to-end rPPG approaches have focused on this transformation where attention mechanisms are crucial for feature extraction. However...
[ "Time-series estimation", "remote photo-plethysmography", "spatial-temporal attention", "non-negative matrix factorization" ]
This work introduces the Factorized Self-Attention Module, which computes multidimensional attention through nonnegative matrix factorization, and integrate it into FactorizePhys, a proposed 3D-CNN model for robust rPPG signal extraction.
21,624
2411.01542
title_snapshot
[ 0.02600422129034996, -0.008307782001793385, 0.026005923748016357, 0.001797666773200035, 0.040036726742982864, 0.04191362112760544, 0.03656867891550064, -0.009018603712320328, -0.02885274961590767, -0.045059699565172195, 0.0274586733430624, -0.028253847733139992, -0.07283543050289154, -0.00...
Multi-Group Proportional Representation in Retrieval
https://openreview.net/forum?id=BRZYhVHvSg
[ "Alex Oesterling", "Claudio Mayrink Verdun", "Alexander Glynn", "Carol Xuan Long", "Lucas Monteiro Paes", "Sajani Vithana", "Martina Cardone", "Flavio Calmon" ]
Poster
fairness
Image search and retrieval tasks can perpetuate harmful stereotypes, erase cultural identities, and amplify social disparities. Current approaches to mitigate these representational harms balance the number of retrieved items across population groups defined by a small number of (often binary) attributes. However, most...
[ "Fairness", "Proportional Representation", "Multi-Group Fairness" ]
We introduce a novel metric for ensuring multi-group proportional representation over sets of images. We apply this metric to retrieval and propose an algorithm that maximizes similarity under a multi-group proportional representation constraint.
21,620
2407.08571
title_snapshot
[ -0.0088723823428154, -0.014379017055034637, -0.020659156143665314, 0.042600829154253006, 0.009697751142084599, 0.04507756233215332, 0.004649006295949221, -0.011775585822761059, -0.05953187495470047, -0.02392813004553318, -0.0409080795943737, -0.021893104538321495, -0.05658499151468277, -0....
NeuralSteiner: Learning Steiner Tree for Overflow-avoiding Global Routing in Chip Design
https://openreview.net/forum?id=oEKFPSOWpp
[ "Ruizhi Liu", "ZhishengZeng", "Shizhe Ding", "Jingyan Sui", "Xingquan Li", "Dongbo Bu" ]
Poster
machine_learning_for_other_sciences_and_fields
Global routing plays a critical role in modern chip design. The routing paths generated by global routers often form a rectilinear Steiner tree (RST). Recent advances from the machine learning community have shown the power of learning-based route generation; however, the yielded routing paths by the existing approache...
[ "Global routing", "chip design", "neural network", "Steiner tree", "deep learning", "congestion" ]
We propose NeuralSteiner, a learning-based method to optimize overflow and wirelength simultaneously for global routing problem in chip design.
21,619
null
null
[ -0.0015334623167291284, -0.031163565814495087, -0.0003052824758924544, 0.017912186682224274, 0.03959954157471657, 0.026634497568011284, 0.0006694078911095858, -0.004412021022289991, -0.0044405171647667885, -0.05853015556931496, 0.04206811636686325, -0.05093015357851982, -0.03194849193096161,...
The Group Robustness is in the Details: Revisiting Finetuning under Spurious Correlations
https://openreview.net/forum?id=eHzIwAhj06
[ "Tyler LaBonte", "John Collins Hill", "Xinchen zhang", "Vidya Muthukumar", "Abhishek Kumar" ]
Poster
fairness
Modern machine learning models are prone to over-reliance on spurious correlations, which can often lead to poor performance on minority groups. In this paper, we identify surprising and nuanced behavior of finetuned models on worst-group accuracy via comprehensive experiments on four well-established benchmarks across...
[ "spurious correlations", "group robustness", "distribution shift", "class balancing" ]
We identify surprising and nuanced behavior of finetuned models on worst-group accuracy in settings including class-balancing, model scaling, and spectral analysis.
21,606
2407.13957
title_snapshot
[ 0.00782328937202692, -0.02408536709845066, 0.029717210680246353, 0.025876978412270546, 0.028000444173812866, 0.015011069364845753, 0.05348983407020569, 0.011095574125647545, -0.029330380260944366, -0.04782083258032799, -0.01822277344763279, 0.002152385888621211, -0.07154297083616257, 0.010...
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