Qiaosheng (Eric) Zhang 张乔生

Researcher Shanghai Artificial Intelligence Laboratory (上海人工智能实验室) Xuhui, Shanghai, China E-mail: ericzhang8951@gmail.com, zhangqiaosheng@pjlab.org.cn Ph.D. Advisor Shanghai Innovation Institute (上海创智学院)

About me

Intern Opportunites

Research

Research interests

• Reinforcement Learning (RL): RL from Human Feedback (RLHF), Multi-agent RL, Offline RL

• Large Language Model (LLM): LLM reasoning, LLM alignment, Multimodal LLM, Multi-LLM-agents collaboration

• Information Theory: Shannon theory, Covert communication, Information-theoretic security

• Community Detection (a.k.a. clustering): Stochastic Block Model, Hypergraph

Selected Publications

• Provably Efficient Information-Directed Sampling Algorithms for Multi-Agent Reinforcement Learning

  Qiaosheng Zhang, Chenjia Bai, Shuyue Hu, Zhen Wang, Xuelong Li

  Preprint, 2024.

• Constrained Ensemble Exploration for Unsupervised Skill Discovery

  Chenjia Bai, Rushuai Yang, Qiaosheng Zhang, Kang Xu, Yi Chen, Ting Xiao, Xuelong Li

  International Conference on Machine Learning (ICML), 2024.

• On the Role of General Function Approximation in Offline Reinforcement Learning

  Chenjie Mao†, Qiaosheng Zhang, Zhen Wang, Xuelong Li (†interns mentored by me.)

  International Conference on Learning Representations (ICLR), 2024. (Spotlight, Top 5% )

• Enhancing Covert Communication in OOK Schemes by Phase Deflection

  Xiaopeng Ji, Ruizhi Zhu, Qiaosheng Zhang, Chunguo Li, Daming Cao

  IEEE Transactions on Information Forensic and Security, 2024.

• Ensemble Successor Representations for Task Generalization in Offline-to-Online Reinforcement Learning

  Changhong Wang, Xudong Yu, Chenjia Bai, Qiaosheng Zhang, Zhen Wang

  SCIENCE CHINA Information Sciences, 2024.

• Exact Recovery in the General Hypergraph Stochastic Block Model

  Qiaosheng Zhang, Vincent Y. F. Tan

  IEEE Transactions on Information Theory, 2023.

• Covert Communication with Mismatched Decoders

  Qiaosheng Zhang, Vincent Y. F. Tan

  IEEE Transactions on Information Theory, 2023. (accepted in part in IEEE ISIT 2022)

• Optimal Information Security Against Limited-view Adversaries: Beyond MDS Codes

  Qiaosheng Zhang, Swanand Kadhe, Mayank Bakshi, Sidharth Jaggi, Alex Sprintson

  IEEE Transactions on Communications, 2023. (accepted in part in IEEE ISIT 2015 and IEEE ITW 2015)

• Covert Communication Gains from Adversary’s Uncertainty of Phase Angles

  Sen Qiao, Daming Cao, Qiaosheng Zhang, Yinfei Xu, Guangjie Liu

  IEEE Transactions on Information Forensic and Security, 2023.

• MC2G: An Efficient Algorithm for Matrix Completion with Social and Item Similarity Graphs

  Qiaosheng Zhang#, Geewon Suh#, Changho Suh, Vincent Y. F. Tan (# indicates equal contribution)

  IEEE Transactions on Signal Processing, 2022.

• Covert Communication over Adversarially Jammed Channels

  Qiaosheng Zhang, Mayank Bakshi, Sidharth Jaggi

  IEEE Transactions on Information Theory, 2021. (accepted in part in IEEE ITW 2018)

• Covert Identification over Binary-Input Discrete Memoryless Channels

  Qiaosheng Zhang, Vincent Y. F. Tan

  IEEE Transactions on Information Theory, 2021.

• Community Detection and Matrix Completion with Social and Item Similarity Graphs

  Qiaosheng Zhang, Vincent Y. F. Tan, Changho Suh

  IEEE Transactions on Signal Processing, 2021. (accepted in part in IEEE ISIT 2020)

• Optimal Change-Point Detection with Training Sequences in the Large and Moderate Deviations Regimes

  Haiyun He, Qiaosheng Zhang, Vincent Y. F. Tan

  IEEE Transactions on Information Theory, 2021. (accepted in part in IEEE ISITA 2020)

• Covert Communication with Polynomial Computational Complexity

  Qiaosheng Zhang, Mayank Bakshi, Sidharth Jaggi

  IEEE Transactions on Information Theory, 2020. (accepted in part in IEEE ISIT 2016)

• Undetectable Radios: Covert Communication under Spectral Mask Constraints

  Qiaosheng Zhang, Matthieu Bloch, Mayank Bakshi, Sidharth Jaggi

  IEEE International Symposium on Information Theory (ISIT), 2019

Grants and Awards

• Young Scholars Award (2024), Information Theory Society of Chinese Institute of Electronics

• Overseas Excellent Young Scholars Fund by NSFC

• Outstanding Teaching Assistant Award, Department of Information Engineering, CUHK (2019)