Search Results for author: Shange Tang

Found 9 papers, 1 papers with code

Is Elo Rating Reliable? A Study Under Model Misspecification

no code implementations16 Feb 2025 Shange Tang, Yuanhao Wang, Chi Jin

Elo rating, widely used for skill assessment across diverse domains ranging from competitive games to large language models, is often understood as an incremental update algorithm for estimating a stationary Bradley-Terry (BT) model.

Benign Overfitting in Out-of-Distribution Generalization of Linear Models

no code implementations19 Dec 2024 Shange Tang, Jiayun Wu, Jianqing Fan, Chi Jin

Benign overfitting refers to the phenomenon where an over-parameterized model fits the training data perfectly, including noise in the data, but still generalizes well to the unseen test data.

Out-of-Distribution Generalization regression

Factor Adjusted Spectral Clustering for Mixture Models

no code implementations22 Aug 2024 Shange Tang, Soham Jana, Jianqing Fan

This paper studies a factor modeling-based approach for clustering high-dimensional data generated from a mixture of strongly correlated variables.

Clustering Denoising

Maximum Likelihood Estimation is All You Need for Well-Specified Covariate Shift

no code implementations27 Nov 2023 Jiawei Ge, Shange Tang, Jianqing Fan, Cong Ma, Chi Jin

This paper addresses this fundamental question by proving that, surprisingly, classical Maximum Likelihood Estimation (MLE) purely using source data (without any modification) achieves the minimax optimality for covariate shift under the well-specified setting.

All regression +1

On the Provable Advantage of Unsupervised Pretraining

no code implementations2 Mar 2023 Jiawei Ge, Shange Tang, Jianqing Fan, Chi Jin

Unsupervised pretraining, which learns a useful representation using a large amount of unlabeled data to facilitate the learning of downstream tasks, is a critical component of modern large-scale machine learning systems.

Contrastive Learning Representation Learning

Is Vertical Logistic Regression Privacy-Preserving? A Comprehensive Privacy Analysis and Beyond

no code implementations19 Jul 2022 Yuzheng Hu, Tianle Cai, Jinyong Shan, Shange Tang, Chaochao Cai, Ethan Song, Bo Li, Dawn Song

We provide a comprehensive and rigorous privacy analysis of VLR in a class of open-source Federated Learning frameworks, where the protocols might differ between one another, yet a procedure of obtaining local gradients is implicitly shared.

Philosophy Privacy Preserving +2

Second-order Information in First-order Optimization Methods

no code implementations20 Dec 2019 Yuzheng Hu, Licong Lin, Shange Tang

To the best of our knowledge, this is the first paper that seriously considers the necessity of square root among all adaptive methods.

2D Human Pose Estimation

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