Faculty Profiles - ZHAN Ruohan | The Hong Kong University of Science and Technology

Ruohan ZHAN
詹若涵

PhD in Computational and Mathematical Engineering
Stanford University, 2021

Assistant Professor
Department of Industrial Engineering and Decision Analytics

Google Scholar

MLl8P3AAAAAJ

ORCID

0000-0002-3426-2784

Scopus ID

57194472494

Research Interest

Data-driven decision making
Causal inference
Statistical learning
Experimental design

Publications

2024 1

Policy Learning with Adaptively Collected Data

Management Science, v. 70, (8), August 2024, p. 5270-5297
Zhan, Ruohan; Ren, Zhimei; Athey, Susan; Zhou, Zhengyuan
Article

2023 4

Fragility Index: A New Approach for Binary Classification

Proceedings of the ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, August 2023, p. 2918-2929
Yang, Chen; Zhang, Ziqiang; Cao, Bo; Cui, Zheng; Hu, Bin; Li, Tong; Long, Daniel Zhuoyu; Qi, Jin; Wang, Feng; Zhan, Ruohan
Conference paper

Proportional Response: Contextual Bandits for Simple and Cumulative Regret Minimization.

Advances in Neural Information Processing Systems, v. 36, December 2023
Krishnamurthy, Sanath Kumar; Zhan, Ruohan; Athey, Susan; Brunskill, Emma
Conference paper

ResAct: Reinforcing Long-term Engagement in Sequential Recommendation with Residual Actor

11th International Conference on Learning Representations, ICLR 2023, 2023, article number
Xue, Wanqi; Cai, Qingpeng; Zhan, Ruohan; Zheng, Dong; Jiang, Peng; Gai, Kun; An, Bo
Conference paper

Two-Stage Constrained Actor-Critic for Short Video Recommendation

WWW '23: Proceedings of the ACM Web Conference 2023 / Association for Computing Machinery. New York, USA : Association for Computing Machinery, 2023, p. 865-875
Cai, Qingpeng; Xue, Zhenghai; Zhang, Chi; Xue, Wanqi; Liu, Shuchang; Zhan, Ruohan; Wang, Xueliang; Zuo, Tianyou; Xie, Wentao; Zheng, Dong; Jiang, Peng; Gai, Kun
Conference paper

2022 1

Deconfounding Duration Bias in Watch-time Prediction for Video Recommendation

Proceedings of the ACM SIGKDD International Conference on Knowledge Discovery and Data Mining / Association for Computing Machinery. New York, NY, USA : Association for Computing Machinery, 2022, p. 4472-4481
Zhan, Ruohan; Pei, Changhua; Su, Qiang; Wen, Jianfeng; Wang, Xueliang; Mu, Guanyu; Zheng, Dong; Jiang, Peng; Gai, Kun
Conference paper

2021 3

Confidence intervals for policy evaluation in adaptive experiments

Proceedings of the National Academy of Sciences of the United States of America, v. 118, (15), April 2021, article number e2014602118
Hadad, Vitor; Hirshberg, David A.; Zhan, Ruohan; Wager, Stefan; Athey, Susan
Article

Off-Policy Evaluation via Adaptive Weighting with Data from Contextual Bandits

KDD '21: Proceedings of the 27th ACM SIGKDD Conference on Knowledge Discovery & Data Mining / Association for Computing Machinery. New York, USA : Association for Computing Machinery, 2021, p. 2125-2135
Zhan, Ruohan; Hadad, Vitor; Hirshberg, David A.; Athey, Susan
Conference paper

Towards content provider aware recommender systems: A simulation study on the interplay between user and provider utilities

WWW '21: Proceedings of the Web Conference 2021 / edited by Jure Leskovec, Marko Grobelnik, Marc Najork, Jie Tang, Leila Zia. New York, USA : Association for Computing Machinery, 2021, p. 3872-3883
Zhan, Ruohan; Christakopoulou, Konstantina; Le, Ya; Ooi, Jayden; Mladenov, Martin; Beutel, Alex; Boutilier, Craig; Chi, Ed H.; Chen, Minmin
Conference paper

2020 1

Distortion agnostic deep watermarking

Proceedings of the IEEE Computer Society Conference on Computer Vision and Pattern Recognition / IEEE. Piscataway, NJ : IEEE, 2020, p. 13545-13554, Article number 9157561
Luo, Xiyang; Zhan, Ruohan; Chang, Huiwen; Yang, Feng; Milanfar, Peyman
Conference paper

2017 1

Machine learning for cardiac ultrasound time series data

Progress in Biomedical Optics and Imaging - Proceedings of SPIE, v. 10137, February 2017, article number 101372D
Yuan, Baichuan; Chitturi, Sathya R.; Iyer, Geoffrey; Li, Nuoyu; Xu, Xiaochuan; Zhan, Ruohan; Llerena, Rafael; Yen, Jesse T.; Bertozzi, Andrea L.
Conference paper

2016 1

CT image reconstruction by spatial-radon domain data-driven tight frame regularization

SIAM Journal on Imaging Sciences, v. 9, (3), July 2016, p. 1063-1083
Zhan, Ruohan; Dong, Bin
Article

Article 1

Policy Learning with Adaptively Collected Data

Management Science, v. 70, (8), August 2024, p. 5270-5297
Zhan, Ruohan; Ren, Zhimei; Athey, Susan; Zhou, Zhengyuan

Conference paper 4

Fragility Index: A New Approach for Binary Classification

Proceedings of the ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, August 2023, p. 2918-2929
Yang, Chen; Zhang, Ziqiang; Cao, Bo; Cui, Zheng; Hu, Bin; Li, Tong; Long, Daniel Zhuoyu; Qi, Jin; Wang, Feng; Zhan, Ruohan

Proportional Response: Contextual Bandits for Simple and Cumulative Regret Minimization.

Advances in Neural Information Processing Systems, v. 36, December 2023
Krishnamurthy, Sanath Kumar; Zhan, Ruohan; Athey, Susan; Brunskill, Emma

ResAct: Reinforcing Long-term Engagement in Sequential Recommendation with Residual Actor

11th International Conference on Learning Representations, ICLR 2023, 2023, article number
Xue, Wanqi; Cai, Qingpeng; Zhan, Ruohan; Zheng, Dong; Jiang, Peng; Gai, Kun; An, Bo

Two-Stage Constrained Actor-Critic for Short Video Recommendation

WWW '23: Proceedings of the ACM Web Conference 2023 / Association for Computing Machinery. New York, USA : Association for Computing Machinery, 2023, p. 865-875
Cai, Qingpeng; Xue, Zhenghai; Zhang, Chi; Xue, Wanqi; Liu, Shuchang; Zhan, Ruohan; Wang, Xueliang; Zuo, Tianyou; Xie, Wentao; Zheng, Dong; Jiang, Peng; Gai, Kun

Conference paper 1

Deconfounding Duration Bias in Watch-time Prediction for Video Recommendation

Proceedings of the ACM SIGKDD International Conference on Knowledge Discovery and Data Mining / Association for Computing Machinery. New York, NY, USA : Association for Computing Machinery, 2022, p. 4472-4481
Zhan, Ruohan; Pei, Changhua; Su, Qiang; Wen, Jianfeng; Wang, Xueliang; Mu, Guanyu; Zheng, Dong; Jiang, Peng; Gai, Kun

Article 1

Confidence intervals for policy evaluation in adaptive experiments

Proceedings of the National Academy of Sciences of the United States of America, v. 118, (15), April 2021, article number e2014602118
Hadad, Vitor; Hirshberg, David A.; Zhan, Ruohan; Wager, Stefan; Athey, Susan

Conference paper 2

Off-Policy Evaluation via Adaptive Weighting with Data from Contextual Bandits

KDD '21: Proceedings of the 27th ACM SIGKDD Conference on Knowledge Discovery & Data Mining / Association for Computing Machinery. New York, USA : Association for Computing Machinery, 2021, p. 2125-2135
Zhan, Ruohan; Hadad, Vitor; Hirshberg, David A.; Athey, Susan

Towards content provider aware recommender systems: A simulation study on the interplay between user and provider utilities

WWW '21: Proceedings of the Web Conference 2021 / edited by Jure Leskovec, Marko Grobelnik, Marc Najork, Jie Tang, Leila Zia. New York, USA : Association for Computing Machinery, 2021, p. 3872-3883
Zhan, Ruohan; Christakopoulou, Konstantina; Le, Ya; Ooi, Jayden; Mladenov, Martin; Beutel, Alex; Boutilier, Craig; Chi, Ed H.; Chen, Minmin

Conference paper 1

Distortion agnostic deep watermarking

Proceedings of the IEEE Computer Society Conference on Computer Vision and Pattern Recognition / IEEE. Piscataway, NJ : IEEE, 2020, p. 13545-13554, Article number 9157561
Luo, Xiyang; Zhan, Ruohan; Chang, Huiwen; Yang, Feng; Milanfar, Peyman

Conference paper 1

Machine learning for cardiac ultrasound time series data

Progress in Biomedical Optics and Imaging - Proceedings of SPIE, v. 10137, February 2017, article number 101372D
Yuan, Baichuan; Chitturi, Sathya R.; Iyer, Geoffrey; Li, Nuoyu; Xu, Xiaochuan; Zhan, Ruohan; Llerena, Rafael; Yen, Jesse T.; Bertozzi, Andrea L.

Article 1

CT image reconstruction by spatial-radon domain data-driven tight frame regularization

SIAM Journal on Imaging Sciences, v. 9, (3), July 2016, p. 1063-1083
Zhan, Ruohan; Dong, Bin

2017 1

Machine learning for cardiac ultrasound time series data

Progress in Biomedical Optics and Imaging - Proceedings of SPIE, v. 10137, February 2017, article number 101372D
Yuan, Baichuan; Chitturi, Sathya R.; Iyer, Geoffrey; Li, Nuoyu; Xu, Xiaochuan; Zhan, Ruohan; Llerena, Rafael; Yen, Jesse T.; Bertozzi, Andrea L.
Conference paper

2016 1

CT image reconstruction by spatial-radon domain data-driven tight frame regularization

SIAM Journal on Imaging Sciences, v. 9, (3), July 2016, p. 1063-1083
Zhan, Ruohan; Dong, Bin
Article

No Publications

Teaching Assignment

IEDA3560	Predictive Analytics
IEDA4130	System Simulation
IEDA4920	Decision Analytics Final Year Project
IEDA4960	Industrial Engineering and Engineering Management Final Year Project

IEDA4920	Decision Analytics Final Year Project
IEDA4960	Industrial Engineering and Engineering Management Final Year Project

IEDA4950A

Industrial Engineering Special Project

No Teaching Assignments

Research Postgraduate (RPG) Supervision

From January 2021 to December 2024 (As of 21 November 2024)

Current RPGs

Doctor of Philosophy

LI, Zhiyi
Industrial Engineering and Decision Analytics
HU, Yueying
Industrial Engineering and Decision Analytics
WANG, Yanyuan (co-supervision)
Industrial Engineering and Decision Analytics

Projects

From January 2022 to December 2024

No Projects.
Semiparametric Offline Reinforcement Learning: Policy Evaluation and Optimization

半參數離線強化學習:策略評估和優化 Leading

Guangdong Key Lab of Mathematical Foundations for Artificial Intelligence, The Chinese University of Hong Kong, Shenzhen
Project Team (HKUST)
ZHAN Ruohan (Lead)
2024 -

Research Interest

Publications

2024 1

2023 4

2022 1

2021 3

2020 1

2017 1

2016 1

Article 1

Conference paper 4

Conference paper 1

Article 1

Conference paper 2

Conference paper 1

Conference paper 1

Article 1

2017 1

2016 1

Teaching Assignment

Research Postgraduate (RPG) Supervision

From January 2021 to December 2024 (As of 21 November 2024)

Current RPGs

Projects

From January 2022 to December 2024

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