Search Results for author: Wen-Xin Zhou

Found 10 papers, 3 papers with code

Iteratively Reweighted $\ell_1$-Penalized Robust Regression

2 code implementations9 Jul 2019 Xiaoou Pan, Qiang Sun, Wen-Xin Zhou

This paper investigates tradeoffs among optimization errors, statistical rates of convergence and the effect of heavy-tailed errors for high-dimensional robust regression with nonconvex regularization.

regression Variable Selection

User-Friendly Covariance Estimation for Heavy-Tailed Distributions

1 code implementation5 Nov 2018 Yuan Ke, Stanislav Minsker, Zhao Ren, Qiang Sun, Wen-Xin Zhou

We offer a survey of recent results on covariance estimation for heavy-tailed distributions.

Methodology Statistics Theory Statistics Theory

Matrix Completion via Max-Norm Constrained Optimization

no code implementations2 Mar 2013 T. Tony Cai, Wen-Xin Zhou

Matrix completion has been well studied under the uniform sampling model and the trace-norm regularized methods perform well both theoretically and numerically in such a setting.

Matrix Completion

Max-Norm Optimization for Robust Matrix Recovery

no code implementations24 Sep 2016 Ethan X. Fang, Han Liu, Kim-Chuan Toh, Wen-Xin Zhou

This paper studies the matrix completion problem under arbitrary sampling schemes.

Matrix Completion

Smoothed Quantile Regression with Large-Scale Inference

1 code implementation9 Dec 2020 Xuming He, Xiaoou Pan, Kean Ming Tan, Wen-Xin Zhou

Our numerical studies confirm the conquer estimator as a practical and reliable approach to large-scale inference for quantile regression.

Statistics Theory Methodology Statistics Theory

Communication-Constrained Distributed Quantile Regression with Optimal Statistical Guarantees

no code implementations25 Oct 2021 Kean Ming Tan, Heather Battey, Wen-Xin Zhou

We address the problem of how to achieve optimal inference in distributed quantile regression without stringent scaling conditions.

regression

How do noise tails impact on deep ReLU networks?

no code implementations20 Mar 2022 Jianqing Fan, Yihong Gu, Wen-Xin Zhou

This paper investigates the stability of deep ReLU neural networks for nonparametric regression under the assumption that the noise has only a finite p-th moment.

regression

Retire: Robust Expectile Regression in High Dimensions

no code implementations11 Dec 2022 Rebeka Man, Kean Ming Tan, Zian Wang, Wen-Xin Zhou

In this paper, we propose and study (penalized) robust expectile regression (retire), with a focus on iteratively reweighted $\ell_1$-penalization which reduces the estimation bias from $\ell_1$-penalization and leads to oracle properties.

regression Vocal Bursts Intensity Prediction

Private Optimal Inventory Policy Learning for Feature-based Newsvendor with Unknown Demand

no code implementations23 Apr 2024 Tuoyi Zhao, Wen-Xin Zhou, Lan Wang

By leveraging the structure of the newsvendor problem, we attain a faster excess population risk bound compared to that obtained from an indiscriminate application of existing results for general nonsmooth convex loss.

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