Search Results for author: Yi Tian

Found 8 papers, 0 papers with code

PhysBench: A Benchmark Framework for Remote Physiological Sensing with New Dataset and Baseline

no code implementations7 May 2023 Kegang Wang, Yantao Wei, Mingwen Tong, Jie Gao, Yi Tian, YuJian Ma, ZhongJin Zhao

In recent years, due to the widespread use of internet videos, physiological remote sensing has gained more and more attention in the fields of affective computing and telemedicine.

Can Direct Latent Model Learning Solve Linear Quadratic Gaussian Control?

no code implementations30 Dec 2022 Yi Tian, Kaiqing Zhang, Russ Tedrake, Suvrit Sra

We study the task of learning state representations from potentially high-dimensional observations, with the goal of controlling an unknown partially observable system.

Representation Learning

Byzantine-Robust Federated Linear Bandits

no code implementations3 Apr 2022 Ali Jadbabaie, Haochuan Li, Jian Qian, Yi Tian

In this paper, we study a linear bandit optimization problem in a federated setting where a large collection of distributed agents collaboratively learn a common linear bandit model.

Federated Learning

Complexity Lower Bounds for Nonconvex-Strongly-Concave Min-Max Optimization

no code implementations NeurIPS 2021 Haochuan Li, Yi Tian, Jingzhao Zhang, Ali Jadbabaie

We provide a first-order oracle complexity lower bound for finding stationary points of min-max optimization problems where the objective function is smooth, nonconvex in the minimization variable, and strongly concave in the maximization variable.

Provably Efficient Algorithms for Multi-Objective Competitive RL

no code implementations5 Feb 2021 Tiancheng Yu, Yi Tian, Jingzhao Zhang, Suvrit Sra

To our knowledge, this work provides the first provably efficient algorithms for vector-valued Markov games and our theoretical guarantees are near-optimal.

Multi-Objective Reinforcement Learning

Online Learning in Unknown Markov Games

no code implementations28 Oct 2020 Yi Tian, Yuanhao Wang, Tiancheng Yu, Suvrit Sra

We study online learning in unknown Markov games, a problem that arises in episodic multi-agent reinforcement learning where the actions of the opponents are unobservable.

Multi-agent Reinforcement Learning

Towards Minimax Optimal Reinforcement Learning in Factored Markov Decision Processes

no code implementations NeurIPS 2020 Yi Tian, Jian Qian, Suvrit Sra

We study minimax optimal reinforcement learning in episodic factored Markov decision processes (FMDPs), which are MDPs with conditionally independent transition components.

reinforcement-learning Reinforcement Learning (RL)

Deep Progressive Reinforcement Learning for Skeleton-Based Action Recognition

no code implementations CVPR 2018 Yansong Tang, Yi Tian, Jiwen Lu, Peiyang Li, Jie zhou

In this paper, we propose a deep progressive reinforcement learning (DPRL) method for action recognition in skeleton-based videos, which aims to distil the most informative frames and discard ambiguous frames in sequences for recognizing actions.

Action Recognition reinforcement-learning +3

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