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jiheng
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ZHANG, Jiheng
張季恆

(PhD Georgia Institute of Technology)

Phone: (852) 2358 8627
Email: jiheng@ust.hk
Office: Room 5581
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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. 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

  2. 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

  3. 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

  4. 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

  5. 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

  6. 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

  7. 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

  8. 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

  9. 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

  10. 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

  11. 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

  12. 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

  13. 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

  14. 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

  15. 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

  16. 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

  17. 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

  18. 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

  19. 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

  20. 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

  21. 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

  22. 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

  23. 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

  24. 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

  25. 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

  26. 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. 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

  2. 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

  3. 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

  4. 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

  5. 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

  6. 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

  7. 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