Professor

Research Interests

Applied Probability, Stochastic Modeling and Optimization, Data Analysis, Numerical Methods and Algorithms, With applications in Service Operations Management, Large Communication Networks, Healthcare

Selected Publications

  Article

1. A closer look at the explainability of contrastive language-image pre-training
   • Author(s): Li, Yi; Wang, Hualiang; Duan, Yiqun; Zhang, Jiheng; Li, Xiaomeng
   • Source: Pattern Recognition, v. 162, June 2025, article number 111409
   • Year: 2025


2. Routing and Staffing in Customer Service Chat Systems with Generally Distributed Service and Patience Times
   • Author(s): Long, Zhenghua; Tezcan, Tolga; Zhang, Jiheng
   • Source: Manufacturing & Service Operations Management, June 2024
   • Year: 2024


3. Improving Blockchain Consistency Bound by Assigning Weights to Random Blocks
   • Author(s): Gong, Xueping; Zhang, Qing; Li, Huizhong; Zhang, Jiheng
   • Source: Operations Research, July 2024
   • Year: 2024


4. On-Demand Ride-Matching in a Spatial Model with Abandonment and Cancellation
   • Author(s): Wang, Guangju; Zhang, Hailun; Zhang, Jiheng
   • Source: Operations Research, v. 72, (3), May 2024, p. 1278-1297
   • Year: 2024


5. Technical Note-Asymptotically Optimal Control of Omnichannel Service Systems with Pick-up Guarantees
   • Author(s): Gao, Xuefeng; Huang, Junfei; Zhang, Jiheng
   • Source: Operations Research, April 2023, p. 1-10
   • Year: 2023


6. The Generalized c/μ Rule for Queues with Heterogeneous Server Pools
   • Author(s): Long, Zhenghua; Zhang, Hailun; Zhang, Jiheng; Zhang, Zhe George
   • Source: Operations Research, May 2023
   • Year: 2023


7. Blockchain Operations in the Presence of Security Concerns
   • Author(s): He, Jiahao; Zhang, Guangyuan; Zhang, Jiheng; Zhang, Rachel Quan
   • Source: Manufacturing & Service Operations Management, v. 25, (3), May 2023, p. 1117-1135
   • Year: 2023


8. Approximations and Optimal Control for State-Dependent Limited Processor Sharing Queues
   • Author(s): Gupta, Varun; Zhang, Jiheng
   • Source: Stochastic Systems, v. 12, (2), June 2022, p. 205-225
   • Year: 2022


9. Simulating Multi-Asset Classes Prices Using Wasserstein Generative Adversarial Network: A Study of Stocks, Futures and Cryptocurrency
   • Author(s): Han, Feng; Ma, Xiaojuan; Zhang, Jiheng
   • Source: Journal of Risk and Financial Management, v. 15, (1), January 2022, article number 26
   • Year: 2022


10. On-Demand Ride-Matching in a Spatial Model with Abandonment and Cancellation
    • Author(s): Wang, Guangju; Zhang, Hailun; Zhang, Jiheng
    • Source: Operations Research, November 2022
    • Year: 2022


11. Consensus mechanism design based on structured directed acyclic graphs
    • Author(s): He, Jiahao; Wang, Guanju; Zhang, Guangyuan; Zhang, Jiheng
    • Source: Blockchain: Research and Applications, v. 2, (1), March 2021, article number 100011
    • Year: 2021


12. Simple Policies with Provable Bounds for Managing Perishable Inventory
    • Author(s): Zhang, Hailun; Zhang, Jiheng; Zhang, Rachel Quan
    • Source: Production and Operations Management, v. 29, (11), November 2020, p. 2637-2650
    • Year: 2020


13. Dynamic Scheduling of Multiclass Many-Server Queues with Abandonment: The Generalized c mμ/h Rule
    • Author(s): Long, Zhenghua; Shimkin, Nahum; Zhang, Hailun; Zhang, Jiheng
    • Source: Operations Research, v. 68, (4), July-August 2020, p. 1218-1230
    • Year: 2020


14. Online Demand Fulfillment Under Limited Flexibility
    • Author(s): Xu, Zhen; Zhang, Hailun; Zhang, Jiheng; Zhang, Rachel Quan
    • Source: Management Science, v. 66, (10), October 2020, p. 4667-4685
    • Year: 2020


15. Instantaneous Control of Brownian Motion with a Positive Lead Time
    • Author(s): Xu, Zhen; Zhang, Jiheng; Zhang, Rachel Quan
    • Source: Mathematics of Operations Research, v. 44, (3), August 2019, p. 943-965
    • Year: 2019


16. A Note on Many-Server Fluid Models with Time-Varying Arrivals
    • Author(s): Long, Zhenghua; Zhang, Jiheng
    • Source: Probability in the Engineering and Informational Sciences, v. 33, (3), July 2019, p. 417-437
    • Year: 2019


17. Management of a Shared-Spectrum Network in Wireless Communications
    • Author(s): Wu, Shining; Zhang, Jiheng; Zhang, Rachel Quan
    • Source: Operations Research, v. 66, (4), July 2018, p. 1119-1135
    • Year: 2018


18. Refined Models for Efficiency-driven Queues with Applications to Delay Announcements and Staffing
    • Author(s): Huang, Junfei; Mandelbaum, Avishai; Zhang, Hanqin; Zhang, Jiheng
    • Source: Operations Research, v.65, (5), September 2017, p. 1380-1397
    • Year: 2017


19. Heavy-traffic Approximations for a Layered Network with Limited Resources
    • Author(s): Aveklouris, Angelos; Vlasiou, Maria; Zhang, Jiheng; Zwart, Bert
    • Source: Probability and Mathematical Statistics, v. 37, (2), 2017, p. 497-532
    • Year: 2017


20. A Unified Approach to Diffusion Analysis of Queues with General Patience-Time Distributions
    • Author(s): Huang, Junfei; Zhang, Hanqin; Zhang, Jiheng
    • Source: Mathematics of Operations Research, v. 41, (3), August 2016, p. 1135-1160
    • Year: 2016


21. The impact of slow ocean steaming on delivery reliability and fuel consumption
    • Author(s): Lee, Chung-yee; Lee, Hau L.; Zhang, Jiheng
    • Source: Transportation Research Part E: Logistics and Transportation Review, v. 76, April 2015, p. 176-190
    • Year: 2015


22. Routing and Staffing in Customer Service Chat Systems with Impatient Customers
    • Author(s): Tezcan, Tolga; Zhang, Jiheng
    • Source: Operations Research, v. 62, (4), July 2014, p. 943-956
    • Year: 2014


23. Convergence to equilibrium states for fluid models of many-server queues with abandonment
    • Author(s): Long, Zhenghua; Zhang, Jiheng
    • Source: Operations Research Letters, v. 42, (6-7), September 2014, p. 388-393
    • Year: 2014


24. Staffing and Control of Instant Messaging Contact Centers
    • Author(s): Luo, Jun; Zhang, Jiheng
    • Source: Operations Research, v. 61, (2), March 2013, p. 328-343
    • Year: 2013


25. Fluid Models of Many-server Queues with Abandonment
    • Author(s): Zhang, Jiheng
    • Source: Queueing Systems, v. 73, (2), February 2013, p. 147-193
    • Year: 2013


26. Diffusion Limits of Limited Processor Sharing Queues
    • Author(s): Zhang, Jiheng; Dai, J.G.; Zwart, Bert
    • Source: Annals of Applied Probability, v. 21, (2), April 2011, p. 745-799
    • Year: 2011


27. Numerical Characterization of Porous Solids and Performance Evaluation of Theoretical Models via the Precorrected-FFT Accelerated BEM
    • Author(s): Yan, Zaiyou; Zhang, Jiheng; Ye, Wenjing; Yu, Tongxi
    • Source: CMES: Computer Modeling in Engineering & Sciences, v. 55, (1), 2010, p. 33-60
    • Year: 2010


28. Rapid solution of 3-D oscillatory elastodynamics using the pFFT accelerated BEM
    • Author(s): Yan, Zaiyou; Zhang, Jiheng; Ye, Wenjing
    • Source: Engineering Analysis with Boundary Elements, v. 34, (11), November 2010, p. 956-962
    • Year: 2010


29. Law of Large Number Limits of Limited Processor-Sharing Queues
    • Author(s): Zhang, Jiheng; Dai, J.G.; Zwart, Bert
    • Source: Mathematics of Operations Research, v. 34, (4), November 2009, p. 937-970
    • Year: 2009


30. Steady State Approximations of Limited Processor Sharing Queues in Heavy Traffic
    • Author(s): Zhang, Jiheng; Zwart, Bert
    • Source: Queueing Systems, v. 60, (3-4), December 2008, p. 227-246
    • Year: 2008

  Conference paper

1. Single-Trajectory Distributionally Robust Reinforcement Learning
   • Author(s): Liang, Zhipeng; Ma, Xiaoteng; Blanchet, Jose; Yang, Jun; Zhang, Jiheng; Zhou, Zhengyuan
   • Source: Proceedings of Machine Learning Research, v. 235, 2024, p. 29644-29666
   • Year: 2024


2. RL in Markov Games with Independent Function Approximation: Improved Sample Complexity Bound under the Local Access Model
   • Author(s): Fan, Junyi; Han, Yuxuan; Zeng, Jialin; Cai, Jianfeng; Wang, Yang; Xiang, Yang; Zhang, Jiheng
   • Source: Proceedings of Machine Learning Research, v. 238, May 2024, p. 2035-2043
   • Year: 2024


3. Debiasing Recommendation by Learning Identifiable Latent Confounders
   • Author(s): Zhang, Qing; Zhang, Xiaoying; Liu, Yang; Wang, Hongning; Gao, Min; Zhang, Jiheng; Guo, Ruocheng
   • Source: Proceedings of the ACM SIGKDD International Conference on Knowledge Discovery and Data Mining, August 2023, p. 3353-3363
   • Year: 2023


4. Achieving Near-optimal Regrets in Confounded Contextual Bandits
   • Author(s): Gong, Xueping; Zhang, Jiheng
   • Source: Proceedings of the International Joint Conference on Autonomous Agents and Multiagent Systems, AAMAS, v. 2023-May, May 2023, p. 2643-2645
   • Year: 2023


5. Optimal Contextual Bandits with Knapsacks under Realizability via Regression Oracles
   • Author(s): Han, Yuxuan; Zeng, Jialin; Wang, Yang; Xiang, Yang; Zhang, Jiheng
   • Source: Proceedings of Machine Learning Research, v. 206, 2023, p. 5011-5035
   • Year: 2023


6. A Reduction from Linear Contextual Bandits Lower Bounds to Estimations Lower Bounds
   • Author(s): He, Jiahao; Zhang, Jiheng; Zhang, Rachel Quan
   • Source: Proceedings of the International Conference on Machine Learning, v. 162, July 2022, p. 8660-8677
   • Year: 2022


7. Generalized Linear Bandits with Local Differential Privacy
   • Author(s): Han, Yuxuan; Liang, Zhipeng; Wang, Yang; Zhang, Jiheng
   • Source: Advances in Neural Information Processing Systems, v. 34, December 2021, p. 26511-26522
   • Year: 2021


8. Scaling and Modeling of Call Center Arrivals
   • Author(s): Zhang, Xiaowei; Hong, L. Jeff; Zhang, Jiheng
   • Source: Proceedings - Winter Simulation Conference, v. 2015-January, January 2015, article number 7019913, p. 476-485
   • Year: 2014


9. Separation of Timescales in a Two-Layered Network
   • Author(s): Vlasiou, Maria; Zhang, Jiheng; Zwart, Bert; Van der Mei, Rob
   • Source: 2012 24th International Teletraffic Congress (ITC 24), October 2012, article number 6331834, p. 185-192
   • Year: 2012