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PwsvGnamYD
Bayesian Estimation of Differential Privacy
https://openreview.net/forum?id=PwsvGnamYD
[ "Santiago Zanella-Beguelin", "Lukas Wutschitz", "Shruti Tople", "Ahmed Salem", "Victor Rühle", "Andrew Paverd", "Mohammad Naseri", "Boris Köpf", "Daniel Jones" ]
Poster
null
Algorithms such as Differentially Private SGD enable training machine learning models with formal privacy guarantees. However, because these guarantees hold with respect to unrealistic adversaries, the protection afforded against practical attacks is typically much better. An emerging strand of work empirically estimat...
[]
null
6,837
2206.05199
title_snapshot
USiX9gmGRx
Adaptive Estimation of Graphical Models under Total Positivity
https://openreview.net/forum?id=USiX9gmGRx
[ "Jiaxi Ying", "José Vinícius De Miranda Cardoso", "Daniel P. Palomar" ]
Poster
null
We consider the problem of estimating (diagonally dominant) M-matrices as precision matrices in Gaussian graphical models. Such models have shown interesting properties, e.g., the maximum likelihood estimator exists with as little as two observations in the case of M-matrices, and exists even with one observation in th...
[]
null
6,836
2210.15471
title_snapshot
elL6uw9qOX
GEAR: A GPU-Centric Experience Replay System for Large Reinforcement Learning Models
https://openreview.net/forum?id=elL6uw9qOX
[ "Hanjing Wang", "Man-Kit Sit", "Congjie He", "Ying Wen", "Weinan Zhang", "Jun Wang", "Yaodong Yang", "Luo Mai" ]
Poster
null
This paper introduces a distributed, GPU-centric experience replay system, GEAR, designed to perform scalable reinforcement learning (RL) with large sequence models (such as transformers). With such models, existing systems such as Reverb face considerable bottlenecks in memory, computation, and communication. GEAR, ho...
[]
null
6,829
2310.05205
title_snapshot
jOLIFanYnt
Disentangled Multi-Fidelity Deep Bayesian Active Learning
https://openreview.net/forum?id=jOLIFanYnt
[ "Dongxia Wu", "Ruijia Niu", "Matteo Chinazzi", "Yian Ma", "Rose Yu" ]
Poster
null
To balance quality and cost, various domain areas of science and engineering run simulations at multiple levels of sophistication. Multi-fidelity active learning aims to learn a direct mapping from input parameters to simulation outputs at the highest fidelity by actively acquiring data from multiple fidelity levels. H...
[]
null
6,826
2305.04392
title_snapshot
ikE60aXe8M
Understand and Modularize Generator Optimization in ELECTRA-style Pretraining
https://openreview.net/forum?id=ikE60aXe8M
[ "Chengyu Dong", "Liyuan Liu", "Hao Cheng", "Jingbo Shang", "Jianfeng Gao", "Xiaodong Liu" ]
Poster
null
Despite the effectiveness of ELECTRA-style pre-training, their performance is dependent on the careful selection of the model size for the auxiliary generator, leading to high trial-and-error costs. In this paper, we present the first systematic study of this problem. Our theoretical investigation highlights the import...
[]
null
6,816
null
null
cHhGmXDiHp
NeRFool: Uncovering the Vulnerability of Generalizable Neural Radiance Fields against Adversarial Perturbations
https://openreview.net/forum?id=cHhGmXDiHp
[ "Yonggan Fu", "Ye Yuan", "Souvik Kundu", "Shang Wu", "Shunyao Zhang", "Celine Lin" ]
Poster
null
Generalizable Neural Radiance Fields (GNeRF) are one of the most promising real-world solutions for novel view synthesis, thanks to their cross-scene generalization capability and thus the possibility of instant rendering on new scenes. While adversarial robustness is essential for real-world applications, little study...
[]
null
6,810
2306.06359
title_snapshot
MI5YpKX84O
Provably Efficient Representation Learning with Tractable Planning in Low-Rank POMDP
https://openreview.net/forum?id=MI5YpKX84O
[ "Jiacheng Guo", "Zihao Li", "Huazheng Wang", "Mengdi Wang", "Zhuoran Yang", "Xuezhou Zhang" ]
Poster
null
In this paper, we study representation learning in partially observable Markov Decision Processes (POMDPs), where the agent learns a decoder function that maps a series of high-dimensional raw observations to a compact representation and uses it for more efficient exploration and planning. We focus our attention on the...
[]
null
6,793
2306.12356
title_snapshot
H21qm4xyk9
Taming graph kernels with random features
https://openreview.net/forum?id=H21qm4xyk9
[ "Krzysztof Marcin Choromanski" ]
Oral
null
We introduce in this paper the mechanism of graph random features (GRFs). GRFs can be used to construct unbiased randomized estimators of several important kernels defined on graphs' nodes, in particular the regularized Laplacian kernel. As regular RFs for non-graph kernels, they provide means to scale up kernel method...
[]
null
6,792
2305.00156
title_snapshot
EMN99LtfYA
Block Subsampled Randomized Hadamard Transform for Nyström Approximation on Distributed Architectures
https://openreview.net/forum?id=EMN99LtfYA
[ "Oleg Balabanov", "Matthias Beaupère", "Laura Grigori", "Victor Lederer" ]
Poster
null
This article introduces a novel structured random matrix composed blockwise from subsampled randomized Hadamard transforms (SRHTs). The block SRHT is expected to outperform well-known dimension reduction maps, including SRHT and Gaussian matrices on distributed architectures. We prove that a block SRHT with enough rows...
[]
null
6,779
2210.11295
title_judge
2K2vEVBm5G
Unconstrained Online Learning with Unbounded Losses
https://openreview.net/forum?id=2K2vEVBm5G
[ "Andrew Jacobsen", "Ashok Cutkosky" ]
Poster
null
Algorithms for online learning typically require one or more boundedness assumptions: that the domain is bounded, that the losses are Lipschitz, or both. In this paper, we develop a new setting for online learning with unbounded domains and non-Lipschitz losses. For this setting we provide an algorithm which guarantees...
[]
null
6,766
2306.04923
title_snapshot
LctoTBcGUf
Optimistic Planning by Regularized Dynamic Programming
https://openreview.net/forum?id=LctoTBcGUf
[ "Antoine Moulin", "Gergely Neu" ]
Poster
null
We propose a new method for optimistic planning in infinite-horizon discounted Markov decision processes based on the idea of adding regularization to the updates of an otherwise standard approximate value iteration procedure. This technique allows us to avoid contraction and monotonicity arguments typically required b...
[]
null
6,761
2302.14004
title_snapshot
dtg76BRYCG
Autoregressive Diffusion Model for Graph Generation
https://openreview.net/forum?id=dtg76BRYCG
[ "Lingkai Kong", "Jiaming Cui", "Haotian Sun", "Yuchen Zhuang", "B. Aditya Prakash", "Chao Zhang" ]
Poster
null
Diffusion-based graph generative models have recently obtained promising results for graph generation. However, existing diffusion-based graph generative models are mostly one-shot generative models that apply Gaussian diffusion in the dequantized adjacency matrix space. Such a strategy can suffer from difficulty in mo...
[]
null
6,751
2307.08849
title_snapshot
YZoYYaawO2
Differentiable Tree Operations Promote Compositional Generalization
https://openreview.net/forum?id=YZoYYaawO2
[ "Paul Soulos", "Edward J Hu", "Kate McCurdy", "Yunmo Chen", "Roland Fernandez", "Paul Smolensky", "Jianfeng Gao" ]
Poster
null
In the context of structure-to-structure transformation tasks, learning sequences of discrete symbolic operations poses significant challenges due to their non-differentiability. To facilitate the learning of these symbolic sequences, we introduce a differentiable tree interpreter that compiles high-level symbolic tree...
[]
null
6,739
2306.00751
title_snapshot
Pbaiy3fRCt
Can Neural Network Memorization Be Localized?
https://openreview.net/forum?id=Pbaiy3fRCt
[ "Pratyush Maini", "Michael Curtis Mozer", "Hanie Sedghi", "Zachary Chase Lipton", "J Zico Kolter", "Chiyuan Zhang" ]
Poster
null
Recent efforts at explaining the interplay of memorization and generalization in deep overparametrized networks have posited that neural networks *memorize* ``hard'' examples in the final few layers of the model. Memorization refers to the ability to correctly predict on *atypical* examples of the training set. In this...
[]
null
6,724
2307.09542
title_snapshot
tRhQsHnoFw
Bayesian Design Principles for Frequentist Sequential Learning
https://openreview.net/forum?id=tRhQsHnoFw
[ "Yunbei Xu", "assaf zeevi" ]
Oral
null
We develop a general theory to optimize the frequentist regret for sequential learning problems, where efficient bandit and reinforcement learning algorithms can be derived from unified Bayesian principles. We propose a novel optimization approach to create "algorithmic beliefs" at each round, and use Bayesian posterio...
[]
null
6,716
2310.00806
title_snapshot
Xzfur8Blaf
Domain Adaptation for Time Series Under Feature and Label Shifts
https://openreview.net/forum?id=Xzfur8Blaf
[ "Huan He", "Owen Queen", "Teddy Koker", "Consuelo Cuevas", "Theodoros Tsiligkaridis", "Marinka Zitnik" ]
Poster
null
Unsupervised domain adaptation (UDA) enables the transfer of models trained on source domains to unlabeled target domains. However, transferring complex time series models presents challenges due to the dynamic temporal structure variations across domains. This leads to feature shifts in the time and frequency represen...
[]
null
6,694
2302.03133
title_snapshot
ASOCqTnWIY
Towards Sustainable Learning: Coresets for Data-efficient Deep Learning
https://openreview.net/forum?id=ASOCqTnWIY
[ "Yu Yang", "Kang Hao", "Baharan Mirzasoleiman" ]
Poster
null
To improve the efficiency and sustainability of learning deep models, we propose CREST, the first scalable framework with rigorous theoretical guarantees to identify the most valuable examples for training non-convex models, particularly deep networks. To guarantee convergence to a stationary point of a non-convex func...
[]
null
6,690
2306.01244
title_snapshot
uIOw2ZE1U8
On Enhancing Expressive Power via Compositions of Single Fixed-Size ReLU Network
https://openreview.net/forum?id=uIOw2ZE1U8
[ "Shijun Zhang", "Jianfeng Lu", "Hongkai Zhao" ]
Poster
null
This paper explores the expressive power of deep neural networks through the framework of function compositions. We demonstrate that the repeated compositions of a single fixed-size ReLU network exhibit surprising expressive power, despite the limited expressive capabilities of the individual network itself. Specifical...
[]
null
6,689
2301.12353
title_snapshot
bF1LVbP493
Pix2Struct: Screenshot Parsing as Pretraining for Visual Language Understanding
https://openreview.net/forum?id=bF1LVbP493
[ "Kenton Lee", "Mandar Joshi", "Iulia Raluca Turc", "Hexiang Hu", "Fangyu Liu", "Julian Martin Eisenschlos", "Urvashi Khandelwal", "Peter Shaw", "Ming-Wei Chang", "Kristina Toutanova" ]
Oral
null
Visually-situated language is ubiquitous---sources range from textbooks with diagrams to web pages with images and tables, to mobile apps with buttons and forms. Perhaps due to this diversity, previous work has typically relied on domain-specific recipes with limited sharing of the underlying data, model architectures,...
[]
null
6,684
2210.03347
title_snapshot
ORxBEWMPAJ
JAWS-X: Addressing Efficiency Bottlenecks of Conformal Prediction Under Standard and Feedback Covariate Shift
https://openreview.net/forum?id=ORxBEWMPAJ
[ "Drew Prinster", "Suchi Saria", "Anqi Liu" ]
Oral
null
We study the efficient estimation of predictive confidence intervals for black-box predictors when the common data exchangeability (e.g., i.i.d.) assumption is violated due to potentially feedback-induced shifts in the input data distribution. That is, we focus on standard and feedback covariate shift (FCS), where the ...
[]
null
6,673
null
null
s1hrcLUcld
Contextual Reliability: When Different Features Matter in Different Contexts
https://openreview.net/forum?id=s1hrcLUcld
[ "Gaurav Rohit Ghosal", "Amrith Setlur", "Daniel S. Brown", "Anca Dragan", "Aditi Raghunathan" ]
Poster
null
Deep neural networks often fail catastrophically by relying on spurious correlations. Most prior work assumes a clear dichotomy into spurious and reliable features; however, this is often unrealistic. For example, most of the time we do not want an autonomous car to simply copy the speed of surrounding cars---we don't ...
[]
null
6,672
2307.10026
title_snapshot
XAGr6u76Lu
On Data Manifolds Entailed by Structural Causal Models
https://openreview.net/forum?id=XAGr6u76Lu
[ "Ricardo Dominguez-Olmedo", "Amir-Hossein Karimi", "Georgios Arvanitidis", "Bernhard Schölkopf" ]
Poster
null
The geometric structure of data is an important inductive bias in machine learning. In this work, we characterize the data manifolds entailed by structural causal models. The strengths of the proposed framework are twofold: firstly, the geometric structure of the data manifolds is causally informed, and secondly, it en...
[]
null
6,671
null
null
lwodnXJzu6
Are Neurons Actually Collapsed? On the Fine-Grained Structure in Neural Representations
https://openreview.net/forum?id=lwodnXJzu6
[ "Yongyi Yang", "Jacob Steinhardt", "Wei Hu" ]
Poster
null
Recent work has observed an intriguing "Neural Collapse'' phenomenon in well-trained neural networks, where the last-layer representations of training samples with the same label collapse into each other. This appears to suggest that the last-layer representations are completely determined by the labels, and do not dep...
[]
null
6,668
2306.17105
title_snapshot
mGUJMqjDwE
Provably Learning Object-Centric Representations
https://openreview.net/forum?id=mGUJMqjDwE
[ "Jack Brady", "Roland S. Zimmermann", "Yash Sharma", "Bernhard Schölkopf", "Julius von Kügelgen", "Wieland Brendel" ]
Oral
null
Learning structured representations of the visual world in terms of objects promises to significantly improve the generalization abilities of current machine learning models. While recent efforts to this end have shown promising empirical progress, a theoretical account of when unsupervised object-centric representatio...
[]
null
6,664
2305.14229
title_snapshot
gWC3Q3pyHe
Fast Sampling of Diffusion Models via Operator Learning
https://openreview.net/forum?id=gWC3Q3pyHe
[ "Hongkai Zheng", "Weili Nie", "Arash Vahdat", "Kamyar Azizzadenesheli", "Anima Anandkumar" ]
Poster
null
Diffusion models have found widespread adoption in various areas. However, their sampling process is slow because it requires hundreds to thousands of network evaluations to emulate a continuous process defined by differential equations. In this work, we use neural operators, an efficient method to solve the probabilit...
[]
null
6,663
2211.13449
title_snapshot
HiX1ybkFMl
Unsupervised Out-of-Distribution Detection with Diffusion Inpainting
https://openreview.net/forum?id=HiX1ybkFMl
[ "Zhenzhen Liu", "Jin Peng Zhou", "Yufan Wang", "Kilian Q Weinberger" ]
Poster
null
Unsupervised out-of-distribution detection (OOD) seeks to identify out-of-domain data by learning only from unlabeled in-domain data. We present a novel approach for this task -- Lift, Map, Detect (LMD) -- that leverages recent advancement in diffusion models. Diffusion models are one type of generative models. At thei...
[]
null
6,661
2302.10326
title_snapshot
PKrDN23Rke
Sequence Modeling with Multiresolution Convolutional Memory
https://openreview.net/forum?id=PKrDN23Rke
[ "Jiaxin Shi", "Ke Alexander Wang", "Emily Fox" ]
Poster
null
Efficiently capturing the long-range patterns in sequential data sources salient to a given task---such as classification and generative modeling---poses a fundamental challenge. Popular approaches in the space tradeoff between the memory burden of brute-force enumeration and comparison, as in transformers, the computa...
[]
null
6,657
2305.01638
title_snapshot
BrOPvKsIXW
The Hessian perspective into the Nature of Convolutional Neural Networks
https://openreview.net/forum?id=BrOPvKsIXW
[ "Sidak Pal Singh", "Thomas Hofmann", "Bernhard Schölkopf" ]
Poster
null
While Convolutional Neural Networks (CNNs) have long been investigated and applied, as well as theorized, we aim to provide a slightly different perspective into their nature --- through the perspective of their Hessian maps. The reason is that the loss Hessian captures the pairwise interaction of parameters and theref...
[]
null
6,656
2305.09088
title_snapshot
mSslPmao9h
Towards Learning Geometric Eigen-Lengths Crucial for Fitting Tasks
https://openreview.net/forum?id=mSslPmao9h
[ "Yijia Weng", "Kaichun Mo", "Ruoxi Shi", "Yanchao Yang", "Leonidas Guibas" ]
Poster
null
Some extremely low-dimensional yet crucial geometric eigen-lengths often determine the success of some geometric tasks. For example, the *height* of an object is important to measure to check if it can fit between the shelves of a cabinet, while the *width* of a couch is crucial when trying to move it through a doorway...
[]
null
6,651
2312.15610
title_snapshot
OxkESnZnN2
Improved Learning-Augmented Algorithms for the Multi-Option Ski Rental Problem via Best-Possible Competitive Analysis
https://openreview.net/forum?id=OxkESnZnN2
[ "Yongho Shin", "Changyeol Lee", "Gukryeol Lee", "Hyung-Chan An" ]
Poster
null
In this paper, we present improved learning-augmented algorithms for the multi-option ski rental problem. Learning-augmented algorithms take ML predictions as an added part of the input and incorporates these predictions in solving the given problem. Due to their unique strength that combines the power of ML prediction...
[]
null
6,642
2302.06832
title_snapshot
PsQJm6lG3s
On Regularization and Inference with Label Constraints
https://openreview.net/forum?id=PsQJm6lG3s
[ "Kaifu Wang", "Hangfeng He", "Tin D. Nguyen", "Piyush Kumar", "Dan Roth" ]
Poster
null
Prior knowledge and symbolic rules in machine learning are often expressed in the form of label constraints, especially in structured prediction problems. In this work, we compare two common strategies for encoding label constraints in a machine learning pipeline, *regularization with constraints* and *constrained infe...
[]
null
6,635
2307.03886
title_snapshot
oupdxuURWD
Simple Disentanglement of Style and Content in Visual Representations
https://openreview.net/forum?id=oupdxuURWD
[ "Lilian Ngweta", "Subha Maity", "Alex Gittens", "Yuekai Sun", "Mikhail Yurochkin" ]
Poster
null
Learning visual representations with interpretable features, i.e., disentangled representations, remains a challenging problem. Existing methods demonstrate some success but are hard to apply to large-scale vision datasets like ImageNet. In this work, we propose a simple post-processing framework to disentangle content...
[]
null
6,630
2302.09795
title_snapshot
AvwlrX9AQr
Beyond the Edge of Stability via Two-step Gradient Updates
https://openreview.net/forum?id=AvwlrX9AQr
[ "Lei Chen", "Joan Bruna" ]
Poster
null
Gradient Descent (GD) is a powerful workhorse of modern machine learning thanks to its scalability and efficiency in high-dimensional spaces. Its ability to find local minimisers is only guaranteed for losses with Lipschitz gradients, where it can be seen as a 'bona-fide' discretisation of an underlying gradient flow. ...
[]
null
6,628
2206.04172
title_snapshot
qorOnDor89
On the Role of Attention in Prompt-tuning
https://openreview.net/forum?id=qorOnDor89
[ "Samet Oymak", "Ankit Singh Rawat", "Mahdi Soltanolkotabi", "Christos Thrampoulidis" ]
Poster
null
Prompt-tuning is an emerging strategy to adapt large language models (LLM) to downstream tasks by learning a (soft-)prompt parameter from data. Despite its success in LLMs, there is limited theoretical understanding of the power of prompt-tuning and the role of the attention mechanism in prompting. In this work, we exp...
[]
null
6,614
2306.03435
title_snapshot
nrSM4XmF5k
Master-ASR: Achieving Multilingual Scalability and Low-Resource Adaptation in ASR with Modular Learning
https://openreview.net/forum?id=nrSM4XmF5k
[ "Zhongzhi Yu", "Yang Zhang", "Kaizhi Qian", "Cheng Wan", "Yonggan Fu", "Yongan Zhang", "Celine Lin" ]
Poster
null
Despite the impressive performance recently achieved by automatic speech recognition (ASR), we observe two primary challenges that hinder its broader applications: (1) The difficulty of introducing scalability into the model to support more languages with limited training, inference, and storage overhead; (2) The low-r...
[]
null
6,612
2306.15686
title_snapshot
9CZZ8tIhSv
Hyperbolic Representation Learning: Revisiting and Advancing
https://openreview.net/forum?id=9CZZ8tIhSv
[ "Menglin Yang", "min zhou", "Zhitao Ying", "Yankai Chen", "Irwin King" ]
Poster
null
The non-Euclidean geometry of hyperbolic spaces has recently garnered considerable attention in the realm of representation learning. Current endeavors in hyperbolic representation largely presuppose that the underlying hierarchies can be automatically inferred and preserved through the adaptive optimization process. T...
[]
null
6,611
2306.09118
title_snapshot
4IzEmHLono
Learning Belief Representations for Partially Observable Deep RL
https://openreview.net/forum?id=4IzEmHLono
[ "Andrew Wang", "Andrew C Li", "Toryn Q. Klassen", "Rodrigo Toro Icarte", "Sheila A. McIlraith" ]
Poster
null
Many important real-world Reinforcement Learning (RL) problems involve partial observability and require policies with memory. Unfortunately, standard deep RL algorithms for partially observable settings typically condition on the full history of interactions and are notoriously difficult to train. We propose a novel d...
[]
null
6,603
null
null
Asrg2we3dP
MABe22: A Multi-Species Multi-Task Benchmark for Learned Representations of Behavior
https://openreview.net/forum?id=Asrg2we3dP
[ "Jennifer J. Sun", "Markus Marks", "Andrew Wesley Ulmer", "Dipam Chakraborty", "Brian Geuther", "Edward Hayes", "Heng Jia", "Vivek Kumar", "Sebastian Oleszko", "Zachary Partridge", "Milan Peelman", "Alice Robie", "Catherine E Schretter", "Keith Sheppard", "Chao Sun", "Param Uttarwar", ...
Poster
null
We introduce MABe22, a large-scale, multi-agent video and trajectory benchmark to assess the quality of learned behavior representations. This dataset is collected from a variety of biology experiments, and includes triplets of interacting mice (4.7 million frames video+pose tracking data, 10 million frames pose only),...
[]
null
6,594
2207.10553
title_snapshot
ccwSdYv1GI
Scaling Up Dataset Distillation to ImageNet-1K with Constant Memory
https://openreview.net/forum?id=ccwSdYv1GI
[ "Justin Cui", "Ruochen Wang", "Si Si", "Cho-Jui Hsieh" ]
Poster
null
Dataset Distillation is a newly emerging area that aims to distill large datasets into much smaller and highly informative synthetic ones to accelerate training and reduce storage. Among various dataset distillation methods, trajectory-matching-based methods (MTT) have achieved SOTA performance in many tasks, e.g., on ...
[]
null
6,583
2211.10586
title_snapshot
mernbGTe24
MultiAdam: Parameter-wise Scale-invariant Optimizer for Multiscale Training of Physics-informed Neural Networks
https://openreview.net/forum?id=mernbGTe24
[ "Jiachen Yao", "Chang Su", "Zhongkai Hao", "Songming Liu", "Hang Su", "Jun Zhu" ]
Poster
null
Physics-informed Neural Networks (PINNs) have recently achieved remarkable progress in solving Partial Differential Equations (PDEs) in various fields by minimizing a weighted sum of PDE loss and boundary loss. However, there are several critical challenges in the training of PINNs, including the lack of theoretical fr...
[]
null
6,572
2306.02816
title_snapshot
gJboa2IOua
Polynomial Preconditioning for Gradient Methods
https://openreview.net/forum?id=gJboa2IOua
[ "Nikita Doikov", "Anton Rodomanov" ]
Poster
null
We study first-order methods with preconditioning for solving structured convex optimization problems. We propose a new family of preconditioners generated by the symmetric polynomials. They provide the first-order optimization methods with a provable improvement of the condition number, cutting the gaps between highes...
[]
null
6,562
2301.13194
title_snapshot
lgEYRIk7GS
Internally Rewarded Reinforcement Learning
https://openreview.net/forum?id=lgEYRIk7GS
[ "Mengdi Li", "Xufeng Zhao", "Jae Hee Lee", "Cornelius Weber", "Stefan Wermter" ]
Poster
null
We study a class of reinforcement learning problems where the reward signals for policy learning are generated by a discriminator that is dependent on and jointly optimized with the policy. This interdependence between the policy and the discriminator leads to an unstable learning process because reward signals from an...
[]
null
6,561
2302.00270
title_snapshot
Lq5H6B6yug
Lottery Tickets in Evolutionary Optimization: On Sparse Backpropagation-Free Trainability
https://openreview.net/forum?id=Lq5H6B6yug
[ "Robert Tjarko Lange", "Henning Sprekeler" ]
Poster
null
Is the lottery ticket phenomenon an idiosyncrasy of gradient-based training or does it generalize to evolutionary optimization? In this paper we establish the existence of highly sparse trainable initializations for evolution strategies (ES) and characterize qualitative differences compared to gradient descent (GD)-bas...
[]
null
6,560
2306.00045
title_snapshot
ABzDOXlxf0
Slot-VAE: Object-Centric Scene Generation with Slot Attention
https://openreview.net/forum?id=ABzDOXlxf0
[ "Yanbo Wang", "Letao Liu", "Justin Dauwels" ]
Poster
null
Slot attention has shown remarkable object-centric representation learning performance in computer vision tasks without requiring any supervision. Despite its object-centric binding ability brought by compositional modelling, as a deterministic module, slot attention lacks the ability to generate novel scenes. In this ...
[]
null
6,552
2306.06997
title_snapshot
rDMAJECBM2
Model-based Reinforcement Learning with Scalable Composite Policy Gradient Estimators
https://openreview.net/forum?id=rDMAJECBM2
[ "Paavo Parmas", "Takuma Seno", "Yuma Aoki" ]
Poster
null
In model-based reinforcement learning (MBRL), policy gradients can be estimated either by derivative-free RL methods, such as likelihood ratio gradients (LR), or by backpropagating through a differentiable model via reparameterization gradients (RP). Instead of using one or the other, the Total Propagation (TP) algorit...
[]
null
6,550
null
null
MtopPVk3Ll
H-Likelihood Approach to Deep Neural Networks with Temporal-Spatial Random Effects for High-Cardinality Categorical Features
https://openreview.net/forum?id=MtopPVk3Ll
[ "Hangbin Lee", "Youngjo Lee" ]
Oral
null
Deep Neural Networks (DNNs) are one of the most powerful tools for prediction, but many of them implicitly assume that the data are statistically independent. However, in the real world, it is common for large-scale data to be clustered with temporal-spatial correlation structures. Variational approaches and integrated...
[]
null
6,548
null
null
uSJP34JCTu
Predicting Rare Events by Shrinking Towards Proportional Odds
https://openreview.net/forum?id=uSJP34JCTu
[ "Gregory Faletto", "Jacob Bien" ]
Poster
null
Training classifiers is difficult with severe class imbalance, but many rare events are the culmination of a sequence with much more common intermediate outcomes. For example, in online marketing a user first sees an ad, then may click on it, and finally may make a purchase; estimating the probability of purchases is d...
[]
null
6,542
2305.18700
title_snapshot
OT6gRRMmcE
The Optimal Approximation Factors in Misspecified Off-Policy Value Function Estimation
https://openreview.net/forum?id=OT6gRRMmcE
[ "Philip Amortila", "Nan Jiang", "Csaba Szepesvari" ]
Poster
null
Theoretical guarantees in reinforcement learning (RL) are known to suffer multiplicative blow-up factors with respect to the misspecification error of function approximation. Yet, the nature of such *approximation factors*---especially their optimal form in a given learning problem---is poorly understood. In this paper...
[]
null
6,539
2307.13332
title_snapshot
QBUS4OXqvM
Internet Explorer: Targeted Representation Learning on the Open Web
https://openreview.net/forum?id=QBUS4OXqvM
[ "Alexander Cong Li", "Ellis Langham Brown", "Alexei A Efros", "Deepak Pathak" ]
Poster
null
Vision models typically rely on fine-tuning general-purpose models pre-trained on large, static datasets. These general-purpose models only capture the knowledge within their pre-training datasets, which are tiny, out-of-date snapshots of the Internet---where billions of images are uploaded each day. We suggest an alte...
[]
null
6,537
2302.14051
title_snapshot
eYlLlvzngu
Using Large Language Models to Simulate Multiple Humans and Replicate Human Subject Studies
https://openreview.net/forum?id=eYlLlvzngu
[ "Gati Aher", "Rosa I. Arriaga", "Adam Tauman Kalai" ]
Oral
null
We introduce a new type of test, called a Turing Experiment (TE), for evaluating to what extent a given language model, such as GPT models, can simulate different aspects of human behavior. A TE can also reveal consistent distortions in a language model’s simulation of a specific human behavior. Unlike the Turing Test,...
[]
null
6,534
2208.10264
title_snapshot
r3M5cBtpYq
Robust and private stochastic linear bandits
https://openreview.net/forum?id=r3M5cBtpYq
[ "Vasileios Charisopoulos", "Hossein Esfandiari", "Vahab Mirrokni" ]
Poster
null
In this paper, we study the stochastic linear bandit problem under the additional requirements of *differential privacy*, *robustness* and *batched observations*. In particular, we assume an adversary randomly chooses a constant fraction of the observed rewards in each batch, replacing them with arbitrary numbers. We p...
[]
null
6,533
null
null
wGgIcftFzm
High-dimensional Location Estimation via Norm Concentration for Subgamma Vectors
https://openreview.net/forum?id=wGgIcftFzm
[ "Shivam Gupta", "Jasper C.H. Lee", "Eric Price" ]
Poster
null
In location estimation, we are given $n$ samples from a known distribution $f$ shifted by an unknown translation $\lambda$, and want to estimate $\lambda$ as precisely as possible. Asymptotically, the maximum likelihood estimate achieves the Cramér-Rao bound of error $\mathcal N(0, \frac{1}{n\mathcal I})$, where $\math...
[]
null
6,529
2302.02497
title_snapshot
E3BW8pG64Y
Action Matching: Learning Stochastic Dynamics from Samples
https://openreview.net/forum?id=E3BW8pG64Y
[ "Kirill Neklyudov", "Rob Brekelmans", "Daniel Severo", "Alireza Makhzani" ]
Poster
null
Learning the continuous dynamics of a system from snapshots of its temporal marginals is a problem which appears throughout natural sciences and machine learning, including in quantum systems, single-cell biological data, and generative modeling. In these settings, we assume access to cross-sectional samples that are u...
[]
null
6,526
2210.06662
title_snapshot
W5xbQluQ5d
Short-lived High-volume Bandits
https://openreview.net/forum?id=W5xbQluQ5d
[ "Su Jia", "Nishant Oli", "Ian Anderson", "Paul Duff", "Andrew A Li", "Ramamoorthi Ravi" ]
Poster
null
Modern platforms leverage randomized experiments to make informed decisions from a given set of alternatives. As a particularly challenging scenario, these alternatives can potentially have (i) high volume, with thousands of new items being released each hour, and (ii) short lifetime, either due to the contents' transi...
[]
null
6,522
null
null
YeTYJz7th5
Learning Temporally AbstractWorld Models without Online Experimentation
https://openreview.net/forum?id=YeTYJz7th5
[ "Benjamin Freed", "Siddarth Venkatraman", "Guillaume Adrien Sartoretti", "Jeff Schneider", "Howie Choset" ]
Poster
null
Agents that can build temporally abstract representations of their environment are better able to understand their world and make plans on extended time scales, with limited computational power and modeling capacity. However, existing methods for automatically learning temporally abstract world models usually require m...
[]
null
6,518
null
null
HAtMGUv1ci
Active Policy Improvement from Multiple Black-box Oracles
https://openreview.net/forum?id=HAtMGUv1ci
[ "Xuefeng Liu", "Takuma Yoneda", "Chaoqi Wang", "Matthew Walter", "Yuxin Chen" ]
Poster
null
Reinforcement learning (RL) has made significant strides in various complex domains. However, identifying an effective policy via RL often necessitates extensive exploration. Imitation learning aims to mitigate this issue by using expert demonstrations to guide exploration. In real-world scenarios, one often has access...
[]
null
6,517
2306.10259
title_snapshot
yqUhEFPoDN
Stochastic Gradient Descent-Induced Drift of Representation in a Two-Layer Neural Network
https://openreview.net/forum?id=yqUhEFPoDN
[ "Farhad Pashakhanloo", "Alexei Koulakov" ]
Poster
null
Representational drift refers to over-time changes in neural activation accompanied by a stable task performance. Despite being observed in the brain and in artificial networks, the mechanisms of drift and its implications are not fully understood. Motivated by recent experimental findings of stimulus-dependent drift i...
[]
null
6,498
2302.02563
title_snapshot
MZkbgahv4a
IRNeXt: Rethinking Convolutional Network Design for Image Restoration
https://openreview.net/forum?id=MZkbgahv4a
[ "Yuning Cui", "Wenqi Ren", "Sining Yang", "Xiaochun Cao", "Alois Knoll" ]
Poster
null
We present IRNeXt, a simple yet effective convolutional network architecture for image restoration. Recently, Transformer models have dominated the field of image restoration due to the powerful ability of modeling long-range pixels interactions. In this paper, we excavate the potential of the convolutional neural netw...
[]
null
6,492
null
null
mRiDy4qGwB
TabLeak: Tabular Data Leakage in Federated Learning
https://openreview.net/forum?id=mRiDy4qGwB
[ "Mark Vero", "Mislav Balunovic", "Dimitar Iliev Dimitrov", "Martin Vechev" ]
Poster
null
While federated learning (FL) promises to preserve privacy, recent works in the image and text domains have shown that training updates leak private client data. However, most high-stakes applications of FL (e.g., in healthcare and finance) use tabular data, where the risk of data leakage has not yet been explored. A s...
[]
null
6,491
2210.01785
title_snapshot
mXv2aVqUGG
Can Large Language Models Reason about Program Invariants?
https://openreview.net/forum?id=mXv2aVqUGG
[ "Kexin Pei", "David Bieber", "Kensen Shi", "Charles Sutton", "Pengcheng Yin" ]
Poster
null
Identifying invariants is an important program analysis task with applications towards program understanding, bug finding, vulnerability analysis, and formal verification. Existing tools for identifying program invariants rely on dynamic analysis, requiring traces collected from multiple executions in order to produce ...
[]
null
6,486
null
null
occOHdHWRn
Probabilistic Unrolling: Scalable, Inverse-Free Maximum Likelihood Estimation for Latent Gaussian Models
https://openreview.net/forum?id=occOHdHWRn
[ "Alexander Lin", "Bahareh Tolooshams", "Yves Atchade", "Demba E. Ba" ]
Poster
null
Latent Gaussian models have a rich history in statistics and machine learning, with applications ranging from factor analysis to compressed sensing to time series analysis. The classical method for maximizing the likelihood of these models is the expectation-maximization (EM) algorithm. For problems with high-dimension...
[]
null
6,480
2306.03249
title_snapshot
2DiRkdZJYm
Stable and Consistent Prediction of 3D Characteristic Orientation via Invariant Residual Learning
https://openreview.net/forum?id=2DiRkdZJYm
[ "Seungwook Kim", "Chunghyun Park", "Yoonwoo Jeong", "Jaesik Park", "Minsu Cho" ]
Poster
null
Learning to predict reliable characteristic orientations of 3D point clouds is an important yet challenging problem, as different point clouds of the same class may have largely varying appearances. In this work, we introduce a novel method to decouple the shape geometry and semantics of the input point cloud to achiev...
[]
null
6,479
2306.11406
title_snapshot
vDMHusV7J0
Deep Generative Symbolic Regression with Monte-Carlo-Tree-Search
https://openreview.net/forum?id=vDMHusV7J0
[ "Pierre-Alexandre Kamienny", "Guillaume Lample", "sylvain lamprier", "Marco Virgolin" ]
Poster
null
Symbolic regression (SR) is the problem of learning a symbolic expression from numerical data. Recently, deep neural models trained on procedurally-generated synthetic datasets showed competitive performance compared to more classical Genetic Programming (GP) ones. Unlike their GP counterparts, these neural approaches ...
[]
null
6,477
2302.11223
title_snapshot
HqQIt6mt5B
Mixing Predictions for Online Metric Algorithms
https://openreview.net/forum?id=HqQIt6mt5B
[ "Antonios Antoniadis", "Christian Coester", "Marek Elias", "Adam Polak", "Bertrand Simon" ]
Poster
null
A major technique in learning-augmented online algorithms is combining multiple algorithms or predictors. Since the performance of each predictor may vary over time, it is desirable to use not the single best predictor as a benchmark, but rather a dynamic combination which follows different predictors at different time...
[]
null
6,468
2304.01781
title_snapshot
iRBKUnIjR2
Approximate Causal Effect Identification under Weak Confounding
https://openreview.net/forum?id=iRBKUnIjR2
[ "Ziwei Jiang", "Lai Wei", "Murat Kocaoglu" ]
Poster
null
Causal effect estimation has been studied by many researchers when only observational data is available. Sound and complete algorithms have been developed for pointwise estimation of identifiable causal queries. For non-identifiable causal queries, researchers developed polynomial programs to estimate tight bounds on c...
[]
null
6,466
2306.13242
title_snapshot
RIf7TPG5H0
Bootstrap in High Dimension with Low Computation
https://openreview.net/forum?id=RIf7TPG5H0
[ "Henry Lam", "Zhenyuan Liu" ]
Poster
null
The bootstrap is a popular data-driven method to quantify statistical uncertainty, but for modern high-dimensional problems, it could suffer from huge computational costs due to the need to repeatedly generate resamples and refit models. We study the use of bootstraps in high-dimensional environments with a small numbe...
[]
null
6,465
2210.10974
title_snapshot
O4hhnt07Yk
Image Shortcut Squeezing: Countering Perturbative Availability Poisons with Compression
https://openreview.net/forum?id=O4hhnt07Yk
[ "Zhuoran Liu", "Zhengyu Zhao", "Martha Larson" ]
Poster
null
Perturbative availability poisoning (PAP) adds small changes to images to prevent their use for model training. Current research adopts the belief that practical and effective approaches to countering such poisons do not exist. In this paper, we argue that it is time to abandon this belief. We present extensive experim...
[]
null
6,459
2301.13838
title_snapshot
VVdb1la0cW
Proper Losses for Discrete Generative Models
https://openreview.net/forum?id=VVdb1la0cW
[ "Dhamma Kimpara", "Rafael Frongillo", "Bo Waggoner" ]
Poster
null
We initiate the study of proper losses for evaluating generative models in the discrete setting. Unlike traditional proper losses, we treat both the generative model and the target distribution as black-boxes, only assuming ability to draw i.i.d. samples. We define a loss to be black-box proper if the generative distri...
[]
null
6,454
2211.03761
title_snapshot
y8qAZhWbNs
Private Federated Learning with Autotuned Compression
https://openreview.net/forum?id=y8qAZhWbNs
[ "Enayat Ullah", "Christopher A. Choquette-Choo", "Peter Kairouz", "Sewoong Oh" ]
Poster
null
We propose new techniques for reducing communication in private federated learning without the need for setting or tuning compression rates. Our on-the-fly methods automatically adjust the compression rate based on the error induced during training, while maintaining provable privacy guarantees through the use of secur...
[]
null
6,453
2307.10999
title_snapshot
vOcOzRWpvm
SpotEM: Efficient Video Search for Episodic Memory
https://openreview.net/forum?id=vOcOzRWpvm
[ "Santhosh Kumar Ramakrishnan", "Ziad Al-Halah", "Kristen Grauman" ]
Poster
null
The goal in episodic memory (EM) is to search a long egocentric video to answer a natural language query (e.g., “where did I leave my purse?”). Existing EM methods exhaustively extract expensive fixed-length clip features to look everywhere in the video for the answer, which is infeasible for long wearable-camera video...
[]
null
6,452
2306.15850
title_snapshot
JrSWhb7dzp
DRCFS: Doubly Robust Causal Feature Selection
https://openreview.net/forum?id=JrSWhb7dzp
[ "Francesco Quinzan", "Ashkan Soleymani", "Patrick Jaillet", "Cristian R. Rojas", "Stefan Bauer" ]
Poster
null
Knowing the features of a complex system that are highly relevant to a particular target variable is of fundamental interest in many areas of science. Existing approaches are often limited to linear settings, sometimes lack guarantees, and in most cases, do not scale to the problem at hand, in particular to images. We ...
[]
null
6,451
2306.07024
title_snapshot
ET6qkbzeOx
Tractable Control for Autoregressive Language Generation
https://openreview.net/forum?id=ET6qkbzeOx
[ "Honghua Zhang", "Meihua Dang", "Nanyun Peng", "Guy Van den Broeck" ]
Oral
null
Despite the success of autoregressive large language models in text generation, it remains a major challenge to generate text that satisfies complex constraints: sampling from the conditional distribution ${\Pr}(\text{text} | \alpha)$ is intractable for even the simplest lexical constraints $\alpha$. To overcome this c...
[]
null
6,436
2304.07438
title_snapshot
Hsfchgv3WW
Open-Vocabulary Universal Image Segmentation with MaskCLIP
https://openreview.net/forum?id=Hsfchgv3WW
[ "Zheng Ding", "Jieke Wang", "Zhuowen Tu" ]
Poster
null
In this paper, we tackle an emerging computer vision task, open-vocabulary universal image segmentation, that aims to perform semantic/instance/panoptic segmentation (background semantic labeling + foreground instance segmentation) for arbitrary categories of text-based descriptions in inference time. We first build a ...
[]
null
6,434
2208.08984
title_snapshot
FREvWGzoRu
Universal Physics-Informed Neural Networks: Symbolic Differential Operator Discovery with Sparse Data
https://openreview.net/forum?id=FREvWGzoRu
[ "Lena Podina", "Brydon Eastman", "Mohammad Kohandel" ]
Poster
null
In this work we perform symbolic discovery of differential operators in a situation where there is sparse experimental data. This small data regime in machine learning can be made tractable by providing our algorithms with prior information about the underlying dynamics. Physics Informed Neural Networks (PINNs) have be...
[]
null
6,431
2212.04630
title_judge
kdrPtUAfNx
Partial Optimality in Cubic Correlation Clustering
https://openreview.net/forum?id=kdrPtUAfNx
[ "David Stein", "Silvia Di Gregorio", "Bjoern Andres" ]
Poster
null
The higher-order correlation clustering problem is an expressive model, and recently, local search heuristics have been proposed for several applications. Certifying optimality, however, is NP-hard and practically hampered already by the complexity of the problem statement. Here, we focus on establishing partial optima...
[]
null
6,430
2302.04694
title_snapshot
ycZSQdo2F9
InfoDiffusion: Representation Learning Using Information Maximizing Diffusion Models
https://openreview.net/forum?id=ycZSQdo2F9
[ "Yingheng Wang", "Yair Schiff", "Aaron Gokaslan", "Weishen Pan", "Fei Wang", "Christopher De Sa", "Volodymyr Kuleshov" ]
Poster
null
While diffusion models excel at generating high-quality samples, their latent variables typically lack semantic meaning and are not suitable for representation learning. Here, we propose InfoDiffusion, an algorithm that augments diffusion models with low-dimensional latent variables that capture high-level factors of v...
[]
null
6,425
2306.08757
title_snapshot
3fNVNNyKyV
A Large-Scale Study of Probabilistic Calibration in Neural Network Regression
https://openreview.net/forum?id=3fNVNNyKyV
[ "Victor Dheur", "Souhaib Ben Taieb" ]
Poster
null
Accurate probabilistic predictions are essential for optimal decision making. While neural network miscalibration has been studied primarily in classification, we investigate this in the less-explored domain of regression. We conduct the largest empirical study to date to assess the probabilistic calibration of neural ...
[]
null
6,411
2306.02738
title_snapshot
szQzz2H8er
Global optimality of Elman-type RNNs in the mean-field regime
https://openreview.net/forum?id=szQzz2H8er
[ "Andrea Agazzi", "Jianfeng Lu", "Sayan Mukherjee" ]
Poster
null
We analyze Elman-type recurrent neural networks (RNNs) and their training in the mean-field regime. Specifically, we show convergence of gradient descent training dynamics of the RNN to the corresponding mean-field formulation in the large width limit. We also show that the fixed points of the limiting infinite-width d...
[]
null
6,410
2303.06726
title_judge
Skrk3StS2g
Semi-Autoregressive Energy Flows: Exploring Likelihood-Free Training of Normalizing Flows
https://openreview.net/forum?id=Skrk3StS2g
[ "Phillip Si", "Zeyi Chen", "Subham Sekhar Sahoo", "Yair Schiff", "Volodymyr Kuleshov" ]
Poster
null
Training normalizing flow generative models can be challenging due to the need to calculate computationally expensive determinants of Jacobians. This paper studies the likelihood-free training of flows and proposes the energy objective, an alternative sample-based loss based on proper scoring rules. The energy objectiv...
[]
null
6,409
2206.06672
title_snapshot
bZXfHpbUFi
When do Minimax-fair Learning and Empirical Risk Minimization Coincide?
https://openreview.net/forum?id=bZXfHpbUFi
[ "Harvineet Singh", "Matthäus Kleindessner", "Volkan Cevher", "Rumi Chunara", "Chris Russell" ]
Poster
null
Minimax-fair machine learning minimizes the error for the worst-off group. However, empirical evidence suggests that when sophisticated models are trained with standard empirical risk minimization (ERM), they often have the same performance on the worst-off group as a minimax-trained model. Our work makes this counter-...
[]
null
6,404
null
null
BdwGV6fwbK
Theoretical Behavior of XAI Methods in the Presence of Suppressor Variables
https://openreview.net/forum?id=BdwGV6fwbK
[ "Rick Wilming", "Leo Kieslich", "Benedict Clark", "Stefan Haufe" ]
Poster
null
In recent years, the community of 'explainable artificial intelligence' (XAI) has created a vast body of methods to bridge a perceived gap between model 'complexity' and 'interpretability'. However, a concrete problem to be solved by XAI methods has not yet been formally stated. As a result, XAI methods are lacking the...
[]
null
6,401
2306.01464
title_snapshot
7pcZLgulIV
Probabilistic Imputation for Time-series Classification with Missing Data
https://openreview.net/forum?id=7pcZLgulIV
[ "SeungHyun Kim", "Hyunsu Kim", "Eunggu Yun", "Hwangrae Lee", "Jaehun Lee", "Juho Lee" ]
Poster
null
Multivariate time series data for real-world applications typically contain a significant amount of missing values. The dominant approach for classification with such missing values is to impute them heuristically with specific values (zero, mean, values of adjacent time-steps) or learnable parameters. However, these s...
[]
null
6,400
2308.06738
title_snapshot
khats8j30c
MAHALO: Unifying Offline Reinforcement Learning and Imitation Learning from Observations
https://openreview.net/forum?id=khats8j30c
[ "Anqi Li", "Byron Boots", "Ching-An Cheng" ]
Poster
null
We study a new paradigm for sequential decision making, called offline policy learning from observations (PLfO). Offline PLfO aims to learn policies using datasets with substandard qualities: 1) only a subset of trajectories is labeled with rewards, 2) labeled trajectories may not contain actions, 3) labeled trajectori...
[]
null
6,399
2303.17156
title_snapshot
gzjK23oK9i
Robust Counterfactual Explanations for Neural Networks With Probabilistic Guarantees
https://openreview.net/forum?id=gzjK23oK9i
[ "Faisal Hamman", "Erfaun Noorani", "Saumitra Mishra", "Daniele Magazzeni", "Sanghamitra Dutta" ]
Poster
null
There is an emerging interest in generating robust counterfactual explanations that would remain valid if the model is updated or changed even slightly. Towards finding robust counterfactuals, existing literature often assumes that the original model $m$ and the new model $M$ are bounded in the parameter space, i.e., $...
[]
null
6,389
2305.11997
title_snapshot
IJffiJTLhI
Oracles & Followers: Stackelberg Equilibria in Deep Multi-Agent Reinforcement Learning
https://openreview.net/forum?id=IJffiJTLhI
[ "Matthias Gerstgrasser", "David C. Parkes" ]
Poster
null
Stackelberg equilibria arise naturally in a range of popular learning problems, such as in security games or indirect mechanism design, and have received increasing attention in the reinforcement learning literature. We present a general framework for implementing Stackelberg equilibria search as a multi-agent RL probl...
[]
null
6,387
2210.11942
title_snapshot
LVluQl5lAk
Multi-Agent Learning from Learners
https://openreview.net/forum?id=LVluQl5lAk
[ "Mine Melodi Caliskan", "Francesco Chini", "Setareh Maghsudi" ]
Poster
null
A large body of the "Inverse Reinforcement Learning" (IRL) literature focuses on recovering the reward function from a set of demonstrations of an expert agent who acts optimally or noisily optimally. Nevertheless, some recent works move away from the optimality assumption to study the "Learning from a Learner (LfL)" p...
[]
null
6,385
null
null
teYGEHBSYC
Cut your Losses with Squentropy
https://openreview.net/forum?id=teYGEHBSYC
[ "Like Hui", "Mikhail Belkin", "Stephen Wright" ]
Poster
null
Nearly all practical neural models for classification are trained using the cross-entropy loss. Yet this ubiquitous choice is supported by little theoretical or empirical evidence. Recent work (Hui & Belkin, 2020) suggests that training using the (rescaled) square loss is often superior in terms of the classification a...
[]
null
6,382
2302.03952
title_snapshot
tyqL1bPl0L
The Statistical Scope of Multicalibration
https://openreview.net/forum?id=tyqL1bPl0L
[ "Georgy Noarov", "Aaron Roth" ]
Poster
null
We make a connection between multicalibration and property elicitation and show that (under mild technical conditions) it is possible to produce a multicalibrated predictor for a continuous scalar property $\Gamma$ if and only if $\Gamma$ is *elicitable*. On the negative side, we show that for non-elicitable continuous...
[]
null
6,380
null
null
i7ZqmxsJTW
Sparse Learning of Dynamical Systems in RKHS: An Operator-Theoretic Approach
https://openreview.net/forum?id=i7ZqmxsJTW
[ "Boya Hou", "Sina Sanjari", "Nathan Dahlin", "Subhonmesh Bose", "Umesh Vaidya" ]
Poster
null
Transfer operators provide a rich framework for representing the dynamics of very general, nonlinear dynamical systems. When interacting with reproducing kernel Hilbert spaces (RKHS), descriptions of dynamics often incur prohibitive data storage requirements, motivating dataset sparsification as a precursory step to co...
[]
null
6,374
null
null
BUv0BLrosh
Conformal Prediction with Missing Values
https://openreview.net/forum?id=BUv0BLrosh
[ "Margaux Zaffran", "Aymeric Dieuleveut", "Julie Josse", "Yaniv Romano" ]
Poster
null
Conformal prediction is a theoretically grounded framework for constructing predictive intervals. We study conformal prediction with missing values in the covariates -- a setting that brings new challenges to uncertainty quantification. We first show that the marginal coverage guarantee of conformal prediction holds on...
[]
null
6,373
2306.02732
title_snapshot
O2XerBwfFk
Weakly Supervised Regression with Interval Targets
https://openreview.net/forum?id=O2XerBwfFk
[ "Xin Cheng", "Yuzhou Cao", "Ximing Li", "Bo An", "Lei Feng" ]
Poster
null
This paper investigates an interesting weakly supervised regression setting called regression with interval targets (RIT). Although some of the previous methods on relevant regression settings can be adapted to RIT, they are not statistically consistent, and thus their empirical performance is not guaranteed. In this p...
[]
null
6,358
2306.10458
title_snapshot
EiHX7MfAG0
Controllable Neural Symbolic Regression
https://openreview.net/forum?id=EiHX7MfAG0
[ "Tommaso Bendinelli", "Luca Biggio", "Pierre-Alexandre Kamienny" ]
Poster
null
In symbolic regression, the objective is to find an analytical expression that accurately fits experimental data with the minimal use of mathematical symbols such as operators, variables, and constants. However, the combinatorial space of possible expressions can make it challenging for traditional evolutionary algorit...
[]
null
6,353
2304.10336
title_snapshot
nVO6YTca8O
DSGD-CECA: Decentralized SGD with Communication-Optimal Exact Consensus Algorithm
https://openreview.net/forum?id=nVO6YTca8O
[ "Lisang Ding", "Kexin Jin", "Bicheng Ying", "Kun Yuan", "Wotao Yin" ]
Poster
null
Decentralized Stochastic Gradient Descent (SGD) is an emerging neural network training approach that enables multiple agents to train a model collaboratively and simultaneously. Rather than using a central parameter server to collect gradients from all the agents, each agent keeps a copy of the model parameters and com...
[]
null
6,346
2306.00256
title_snapshot
LMXgU4zrq6
How Do Transformers Learn Topic Structure: Towards a Mechanistic Understanding
https://openreview.net/forum?id=LMXgU4zrq6
[ "Yuchen Li", "Yuanzhi Li", "Andrej Risteski" ]
Poster
null
While the successes of transformers across many domains are indisputable, accurate understanding of the learning mechanics is still largely lacking. Their capabilities have been probed on benchmarks which include a variety of structured and reasoning tasks---but mathematical understanding is lagging substantially behin...
[]
null
6,342
2303.04245
title_snapshot
450iImFM4U
Self-Repellent Random Walks on General Graphs - Achieving Minimal Sampling Variance via Nonlinear Markov Chains
https://openreview.net/forum?id=450iImFM4U
[ "Vishwaraj Doshi", "Jie Hu", "Do Young Eun" ]
Oral
null
We consider random walks on discrete state spaces, such as general undirected graphs, where the random walkers are designed to approximate a target quantity over the network topology via sampling and neighborhood exploration in the form of Markov chain Monte Carlo (MCMC) procedures. Given any Markov chain corresponding...
[]
null
6,337
2305.05097
title_snapshot
nm4NwFfp7a
Subset-Based Instance Optimality in Private Estimation
https://openreview.net/forum?id=nm4NwFfp7a
[ "Travis Dick", "Alex Kulesza", "Ziteng Sun", "Ananda Theertha Suresh" ]
Poster
null
We propose a new definition of instance optimality for differentially private estimation algorithms. Our definition requires an optimal algorithm to compete, simultaneously for every dataset $D$, with the best private benchmark algorithm that (a) knows $D$ in advance and (b) is evaluated by its worst-case performance o...
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null
6,336
2303.01262
title_snapshot
0bR5JuxaoN
A Statistical Perspective on Retrieval-Based Models
https://openreview.net/forum?id=0bR5JuxaoN
[ "Soumya Basu", "Ankit Singh Rawat", "Manzil Zaheer" ]
Poster
null
Many modern high-performing machine learning models increasingly rely on scaling up models, e.g., transformer networks. Simultaneously, a parallel line of work aims to improve the model performance by augmenting an input instance with other (labeled) instances during inference. Examples of such augmentations include ta...
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null
6,333
null
null
CNq0JvrDfw
Adaptive IMLE for Few-shot Pretraining-free Generative Modelling
https://openreview.net/forum?id=CNq0JvrDfw
[ "Mehran Aghabozorgi", "Shichong Peng", "Ke Li" ]
Poster
null
Despite their success on large datasets, GANs have been difficult to apply in the few-shot setting, where only a limited number of training examples are provided. Due to mode collapse, GANs tend to ignore some training examples, causing overfitting to a subset of the training dataset, which is small in the first place....
[]
null
6,328
null
null
F2OjOG4j55
Polyhedral Complex Extraction from ReLU Networks using Edge Subdivision
https://openreview.net/forum?id=F2OjOG4j55
[ "Arturs Berzins" ]
Poster
null
A neural network consisting of piecewise affine building blocks, such as fully-connected layers and ReLU activations, is itself a piecewise affine function supported on a polyhedral complex. This complex has been previously studied to characterize theoretical properties of neural networks, but, in practice, extracting ...
[]
null
6,326
2306.07212
title_snapshot
Rgnaj43Pk0
Task-Specific Skill Localization in Fine-tuned Language Models
https://openreview.net/forum?id=Rgnaj43Pk0
[ "Abhishek Panigrahi", "Nikunj Saunshi", "Haoyu Zhao", "Sanjeev Arora" ]
Poster
null
Pre-trained language models can be fine-tuned to solve diverse NLP tasks, including in few-shot settings. Thus fine-tuning allows the model to quickly pick up task-specific "skills," but there has been limited study of *where* these newly-learnt skills reside inside the massive model. This paper introduces the term *sk...
[]
null
6,325
2302.06600
title_snapshot
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