Search Results for author: Renzhe Xu

Found 18 papers, 9 papers with code

PPA-Game: Characterizing and Learning Competitive Dynamics Among Online Content Creators

no code implementations22 Mar 2024 Renzhe Xu, Haotian Wang, Xingxuan Zhang, Bo Li, Peng Cui

We introduce the Proportional Payoff Allocation Game (PPA-Game) to model how agents, akin to content creators on platforms like YouTube and TikTok, compete for divisible resources and consumers' attention.

On the Out-Of-Distribution Generalization of Multimodal Large Language Models

no code implementations9 Feb 2024 Xingxuan Zhang, Jiansheng Li, Wenjing Chu, Junjia Hai, Renzhe Xu, Yuqing Yang, Shikai Guan, Jiazheng Xu, Peng Cui

We investigate the generalization boundaries of current Multimodal Large Language Models (MLLMs) via comprehensive evaluation under out-of-distribution scenarios and domain-specific tasks.

In-Context Learning Out-of-Distribution Generalization +1

Flatness-Aware Minimization for Domain Generalization

no code implementations ICCV 2023 Xingxuan Zhang, Renzhe Xu, Han Yu, Yancheng Dong, Pengfei Tian, Peng Cu

However, we reveal that Adam is not necessarily the optimal choice for the majority of current DG methods and datasets.

Domain Generalization FAD

Competing for Shareable Arms in Multi-Player Multi-Armed Bandits

1 code implementation30 May 2023 Renzhe Xu, Haotian Wang, Xingxuan Zhang, Bo Li, Peng Cui

In reality, agents often have to learn and maximize the rewards of the resources at the same time.

Multi-Armed Bandits

Rethinking the Evaluation Protocol of Domain Generalization

no code implementations24 May 2023 Han Yu, Xingxuan Zhang, Renzhe Xu, Jiashuo Liu, Yue He, Peng Cui

This paper examines the risks of test data information leakage from two aspects of the current evaluation protocol: supervised pretraining on ImageNet and oracle model selection.

Domain Generalization Model Selection

Gradient Norm Aware Minimization Seeks First-Order Flatness and Improves Generalization

1 code implementation CVPR 2023 Xingxuan Zhang, Renzhe Xu, Han Yu, Hao Zou, Peng Cui

Yet the current definition of flatness discussed in SAM and its follow-ups are limited to the zeroth-order flatness (i. e., the worst-case loss within a perturbation radius).

Model Agnostic Sample Reweighting for Out-of-Distribution Learning

1 code implementation24 Jan 2023 Xiao Zhou, Yong Lin, Renjie Pi, Weizhong Zhang, Renzhe Xu, Peng Cui, Tong Zhang

The overfitting issue is addressed by considering a bilevel formulation to search for the sample reweighting, in which the generalization complexity depends on the search space of sample weights instead of the model size.

Stable Learning via Sparse Variable Independence

no code implementations2 Dec 2022 Han Yu, Peng Cui, Yue He, Zheyan Shen, Yong Lin, Renzhe Xu, Xingxuan Zhang

The problem of covariate-shift generalization has attracted intensive research attention.

Variable Selection

Product Ranking for Revenue Maximization with Multiple Purchases

1 code implementation15 Oct 2022 Renzhe Xu, Xingxuan Zhang, Bo Li, Yafeng Zhang, Xiaolong Chen, Peng Cui

In this paper, we assume that each consumer can purchase multiple products at will.

NICO++: Towards Better Benchmarking for Domain Generalization

2 code implementations CVPR 2023 Xingxuan Zhang, Yue He, Renzhe Xu, Han Yu, Zheyan Shen, Peng Cui

Most current evaluation methods for domain generalization (DG) adopt the leave-one-out strategy as a compromise on the limited number of domains.

Benchmarking Domain Generalization +2

Towards Domain Generalization in Object Detection

no code implementations27 Mar 2022 Xingxuan Zhang, Zekai Xu, Renzhe Xu, Jiashuo Liu, Peng Cui, Weitao Wan, Chong Sun, Chen Li

Despite the striking performance achieved by modern detectors when training and test data are sampled from the same or similar distribution, the generalization ability of detectors under unknown distribution shifts remains hardly studied.

Domain Generalization Object +2

Regulatory Instruments for Fair Personalized Pricing

1 code implementation9 Feb 2022 Renzhe Xu, Xingxuan Zhang, Peng Cui, Bo Li, Zheyan Shen, Jiazheng Xu

Personalized pricing is a business strategy to charge different prices to individual consumers based on their characteristics and behaviors.

A Theoretical Analysis on Independence-driven Importance Weighting for Covariate-shift Generalization

1 code implementation3 Nov 2021 Renzhe Xu, Xingxuan Zhang, Zheyan Shen, Tong Zhang, Peng Cui

Afterward, we prove that under ideal conditions, independence-driven importance weighting algorithms could identify the variables in this set.

feature selection

Towards Out-Of-Distribution Generalization: A Survey

no code implementations31 Aug 2021 Jiashuo Liu, Zheyan Shen, Yue He, Xingxuan Zhang, Renzhe Xu, Han Yu, Peng Cui

This paper represents the first comprehensive, systematic review of OOD generalization, encompassing a spectrum of aspects from problem definition, methodological development, and evaluation procedures, to the implications and future directions of the field.

Out-of-Distribution Generalization Representation Learning

Towards Unsupervised Domain Generalization

no code implementations CVPR 2022 Xingxuan Zhang, Linjun Zhou, Renzhe Xu, Peng Cui, Zheyan Shen, Haoxin Liu

Domain generalization (DG) aims to help models trained on a set of source domains generalize better on unseen target domains.

Domain Generalization Representation Learning

Deep Stable Learning for Out-Of-Distribution Generalization

2 code implementations CVPR 2021 Xingxuan Zhang, Peng Cui, Renzhe Xu, Linjun Zhou, Yue He, Zheyan Shen

Approaches based on deep neural networks have achieved striking performance when testing data and training data share similar distribution, but can significantly fail otherwise.

Domain Generalization Out-of-Distribution Generalization

Sample Balancing for Improving Generalization under Distribution Shifts

no code implementations1 Jan 2021 Xingxuan Zhang, Peng Cui, Renzhe Xu, Yue He, Linjun Zhou, Zheyan Shen

We propose to address this problem by removing the dependencies between features via reweighting training samples, which results in a more balanced distribution and helps deep models get rid of spurious correlations and, in turn, concentrate more on the true connection between features and labels.

Domain Adaptation Object Recognition

Algorithmic Decision Making with Conditional Fairness

1 code implementation18 Jun 2020 Renzhe Xu, Peng Cui, Kun Kuang, Bo Li, Linjun Zhou, Zheyan Shen, Wei Cui

In practice, there frequently exist a certain set of variables we term as fair variables, which are pre-decision covariates such as users' choices.

Decision Making Fairness

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