Search Results for author: Zijian Guo

Found 18 papers, 8 papers with code

StablePCA: Learning Shared Representations across Multiple Sources via Minimax Optimization

no code implementations2 May 2025 Zhenyu Wang, Molei Liu, Jing Lei, Francis Bach, Zijian Guo

To address this challenge, we employ the Fantope relaxation, reformulating the problem as a convex minimax optimization, with the objective defined as the maximum loss across sources.

Fairness

Fundamental Computational Limits in Pursuing Invariant Causal Prediction and Invariance-Guided Regularization

no code implementations29 Jan 2025 Yihong Gu, Cong Fang, Yang Xu, Zijian Guo, Jianqing Fan

Pursuing invariant prediction from heterogeneous environments opens the door to learning causality in a purely data-driven way and has several applications in causal discovery and robust transfer learning.

Causal Discovery Transfer Learning

Causal Invariance Learning via Efficient Optimization of a Nonconvex Objective

no code implementations16 Dec 2024 Zhenyu Wang, Yifan Hu, Peter Bühlmann, Zijian Guo

To address both challenges, we focus on the additive intervention regime and propose nearly necessary and sufficient conditions for ensuring that the invariant prediction model matches the causal outcome model.

Causal Discovery

Inference for Nonlinear Endogenous Treatment Effects Accounting for High-Dimensional Covariate Complexity

1 code implementation12 Oct 2023 Qingliang Fan, Zijian Guo, Ziwei Mei, Cun-Hui Zhang

Using the control function approach for identification, we implement a regularized nonparametric estimation to obtain an initial estimator of the model.

Distributionally Robust Transfer Learning

no code implementations12 Sep 2023 Xin Xiong, Zijian Guo, Tianxi Cai

Many existing transfer learning methods rely on leveraging information from source data that closely resembles the target data.

Transfer Learning

Distributionally Robust Learning for Multi-source Unsupervised Domain Adaptation

1 code implementation5 Sep 2023 Zhenyu Wang, Peter Bühlmann, Zijian Guo

To address such potential distribution shifts, we develop an unsupervised domain adaptation approach that leverages labeled data from multiple source domains and unlabeled data from the target domain.

Federated Learning Multi-Source Unsupervised Domain Adaptation +2

Datasets and Benchmarks for Offline Safe Reinforcement Learning

3 code implementations15 Jun 2023 Zuxin Liu, Zijian Guo, Haohong Lin, Yihang Yao, Jiacheng Zhu, Zhepeng Cen, Hanjiang Hu, Wenhao Yu, Tingnan Zhang, Jie Tan, Ding Zhao

This paper presents a comprehensive benchmarking suite tailored to offline safe reinforcement learning (RL) challenges, aiming to foster progress in the development and evaluation of safe learning algorithms in both the training and deployment phases.

Autonomous Driving Benchmarking +5

On the Robustness of Safe Reinforcement Learning under Observational Perturbations

1 code implementation29 May 2022 Zuxin Liu, Zijian Guo, Zhepeng Cen, huan zhang, Jie Tan, Bo Li, Ding Zhao

One interesting and counter-intuitive finding is that the maximum reward attack is strong, as it can both induce unsafe behaviors and make the attack stealthy by maintaining the reward.

Adversarial Attack reinforcement-learning +3

A Heteroskedasticity-Robust Overidentifying Restriction Test with High-Dimensional Covariates

1 code implementation30 Apr 2022 Qingliang Fan, Zijian Guo, Ziwei Mei

The novelty of the proposed test is that it allows the number of covariates and instruments to be larger than the sample size.

Vocal Bursts Intensity Prediction

Surrogate Assisted Semi-supervised Inference for High Dimensional Risk Prediction

no code implementations4 May 2021 Jue Hou, Zijian Guo, Tianxi Cai

Risk modeling with EHR data is challenging due to a lack of direct observations on the disease outcome, and the high dimensionality of the candidate predictors.

Genetic Risk Prediction Imputation +2

Doubly Debiased Lasso: High-Dimensional Inference under Hidden Confounding

1 code implementation8 Apr 2020 Zijian Guo, Domagoj Ćevid, Peter Bühlmann

Inferring causal relationships or related associations from observational data can be invalidated by the existence of hidden confounding.

Methodology Statistics Theory Statistics Theory

Cannot find the paper you are looking for? You can Submit a new open access paper.