Yingjie (Tom) Fei
About
I am a researcher in the School of Operations Research and Information Engineering (ORIE) at Cornell University. I am very fortunate to be advised by Yudong Chen.
My research lies in machine learning, high-dimensional and robust statistics, and optimization.
Contact: yf275 at cornell dot edu
Publications
Dynamic Regret of Policy Optimization in Non-Stationary Environments
Yingjie Fei, Zhuoran Yang, Zhaoran Wang and Qiaomin Xie.
Conference on Neural Information Processing Systems (NeurIPS), 2020.
[arxiv]
Risk-Sensitive Reinforcement Learning: Near-Optimal Risk-Sample Tradeoff in Regret
Yingjie Fei, Zhuoran Yang, Yudong Chen, Zhaoran Wang and Qiaomin Xie.
Conference on Neural Information Processing Systems (NeurIPS), 2020 (Spotlight).
[arxiv]
Achieving the Bayes Error Rate in Synchronization and Block Models by SDP, Robustly
Yingjie Fei and Yudong Chen.
IEEE Transactions on Information Theory, 2020. [arxiv]
Partial preliminary results appeared in COLT.
Achieving the Bayes Error Rate in Stochastic Block Model by SDP, Robustly
Yingjie Fei and Yudong Chen.
Conference on Learning Theory (COLT), 2019.
[colt]
Exponential Error Rates of SDP for Block Models: Beyond Grothendieck's Inequality
Yingjie Fei and Yudong Chen.
IEEE Transactions on Information Theory, 2019.
[arxiv]
[ieee]
Hidden Integrality of SDP Relaxation for Sub-Gaussian Mixture Models
Yingjie Fei and Yudong Chen.
Conference on Learning Theory (COLT), 2018.
[arxiv]
[colt]
2nd Place, 2018 INFORMS George Nicholson Student Paper Competition.
Talks
Continuous Optimization Seminar, Cornell University, 2019
Scientific Computing and Numerics (SCAN) Seminar, Cornell University, 2019
Young Researchers Workshop, Cornell University, 2019
ORIE PhD Colloquium, Cornell University, 2019
INFORMS Optimization Society Conference, 2018
COR-OPT Seminar, Cornell University, 2018
ORIE PhD Colloquium, Cornell University, 2016
Teaching
ORIE 7190 Selected Topics in Applied Operations Research, Guest Lecturer, 2019
ORIE 3500 Engineering Probability and Statistics II, Teaching Assistant, 2016
ORIE 3120 Industrial Data and Systems Analysis, Teaching Assistant, 2016