Publications

Ph.D. dissertation
Many-Server Queues with Time-Varying Arrivals, Customer Abandonment and Non-exponential Distributions. 
Adviser: Ward Whitt

Journal Papers (published and accepted)

  • A Network of Time-Varying Many-Server Fluid Queues with Customer Abandonment. Operations Research, vol. 59, July-August 2011, pp. 835-846. (With Ward Whitt) [PDF]
    • e-Companion. [PDF]
    • Longer version. [PDF]
  • Large-Time Asymptotics for the Gt/Mt/st+GIt Many-Server Fluid Queues with Abandonment. Queueing Systems, vol. 67, 2011, pp. 145-182. (With Ward Whitt) [PDF]
  • Nearly Periodic Behavior in the The Overloaded G/D/S+GI Queue. Stochastic Systems, vol. 1, No. 2, 2011, p. 340-410. (With Ward Whitt) [PDF]
    • Appendix [PDF]
  • The Gt/GI/st+GI Many-Server Fluid Queue. Queueing Systems, vol. 71, No. 4, 2012, pp. 405-444. (With Ward Whitt) [PDF]
    • Longer version. [PDF]
  • Stabilizing Customer Abandonment in Many-Server Queues with Time-Varying Arrivals. Operations Research, vol. 60, No. 6, 2012, pp. 1551-1564. (With Ward Whitt) [PDF]
    • e-Companion. [PDF]
    • Longer version. [PDF]
  • A Many-Server Fluid Limit for the Gt/GI/st+GI Queueing Model experiencing Periods of Overloading. Operations Research Letters, vol. 40, No. 5, 2012, pp. 307-312. (With Ward Whitt) [PDF]
  • Algorithms for Time-Varying Networks of Many-Server Fluid Queues. INFORMS Journal on Computing. vol. 26, No. 1, 2014, pp. 59-73. (With Ward Whitt) [PDF]
    • e-Companion: Algorithms for Time-Varying Networks of Many-Server Fluid Queues: e-Companion. INFORMS Journal on Computing, vol. 26, No. 1, 2014. (With Ward Whitt) [PDF].
  • Many-Server Heavy-Traffic Limits for Queues with Time-Varying Parameters. Annals of Applied Probability. vol. 24, No. 1, 2014, pp. 378-421. (With Ward Whitt) [PDF]·
  • Stabilizing Performance in Networks of Queues with Time-Varying Arrival Rates. Probability in the Engineering and Informational Sciences. vol. 28, No. 4, 2014, pp. 419-449. (With Ward Whitt) [PDF]
    • Appendix [PDF]
  • A Law of Iterated Logarithm for Multiclass Queues with Preemptive Priority Service Discipline. Queueing Systems. vol. 79, 2015, pp. 251-291.(With Yongjiang Guo) [PDF]
  • Approximations for Heavily-Loaded G/GI/n+GI Queues. Naval Research Logistics, vol. 63, 2016, pp. 187-217. (With Ward Whitt and Yao Yu) [PDF]
    • Appendix [PDF]
  • Staffing a Service System with Non-Poisson Nonstationary Arrivals. Probability in the Engineering and Informational Sciences, vol. 30, 2016, pp. 593-621. (With Beixiang He and Ward Whitt) [PDF]
  • Stabilizing Performance in a Service System with Time-Varying Arrivals and Customer Feedback. European Journal of Operational Research, vol. 256, No. 2, 2017, pp. 473-486. (With Ward Whitt) [PDF]
    • Appendix [PDF]
  • Allocation Heuristics for High-Altitude Long-Endurance UAV Image Intelligence Platforms. Military Operations Research. vol. 22, No. 3, 2017, pp. 3-19. (With Gi-Young Kim, Thom Hodgson, Russell King, and Michael Kay) [PDF]
  • Heavy-Traffic Limit for Initial Content Process. Stochastic Systems. vol. 7, No. 1, 2017, pp. 95 – 142. (With Korhan Aras and Ward Whitt) [PDF]
    • Appendix [PDF]
  • Functional Law of Iterated Logarithm for Multi-Server Queues with Batch Arrivals and Customer Feedback. Annals of Operations Research. vol. 264, No. 1, 2018, pp. 157-191. (With Yongjiang Guo and Renhu Pei) [PDF]
  • Staffing to Stabilize the Tail Probability of Delay in Service Systems with Time-Varying Demand.
    Operations Research. Vol. 66, No. 2, 2018, pp. 514-534. Winner of the 2016 INFORMS JFIG competition (first place) [PDF]
    • e-Companion [PDF]
    • Longer online appendix [PDF]
  • Many-Server Gaussian Limits for Non-Markovian Queues with Customer Abandonment. Queueing Systems, Special Issue in honor of Ward Whitt’s 75th birthday, Vol. 89, No. 1, 2018, pp. 81-125. (With Korhan Aras and Xinyun Chen) [PDF]
    • Longer online appendix [PDF]
  • Modeling and Simulation of Nonstationary Non-Poisson Arrival Processes. INFORMS Journal on Computing. Vol. 31, No. 2, 2019, pp. 347–366. (With Ran Liu, Michael E. Kuhl and James R. Wilson) [PDF]
    • Appendix [PDF]
  • Reducing Delays in Retrial Queues by Simultaneously Differentiating Service Rates and Retrial Rates. Operations Research. Vol. 68, No. 6, 2020, pp. 1648-1667. (With Jinting Wang and Zhongbin Wang) [PDF]
    • e-Companion [PDF]
  • Staffing Many-Server Queues with Autoregressive Inputs. Naval Research Logistics. Vol. 68, No.3, 2021, pp. 312-326. (with Xu Sun) [PDF]
  • Assessing Uncertainty & Risk in an Expeditionary Military Logistics Network. Journal of Defense Modeling and Simulation. Vol. 18, No 2, 135–156, 2021. (with Brandon McConnell, Thom J. Hodgson, Russell E. King, Greg H. Parlier, James R. Wilson, Michael G. Kay, Kristin Thoney-Barletta) [PDF]
  • A Little Bit Flexibility on Headway Distribution is Enough: Data-driven Optimization of Subway Regenerative Energy. Information Sciences. Vol. 554, 276–296, 2021 (with Xiang Li and Bowen Zhang) [PDF]
  • A Functional Law of the Iterated Logarithm for Multi-Class Queues with Batch Arrivals.  Annals of Operations Research. Vol. 300, 51-77, 2021. (With Yongjiang Guo and Xiyang Hou) [PDF]
  • To Pool or Not to Pool: Queueing Design for Large-Scale Service Systems. Operations Research. Vol. 69, No.6, 1866-1885, 2021. (With Ping Cao, Shuangchi He and Junfei Huang) [PDF]
    • e-Companion [PDF]
  • Optimal Control of a Time-Varying Double-Ended Production Queueing Model. Stochastic Systems. Vol. 11, No. 2, 140-173, 2021. (With Chihoon Lee, Xin Liu and Ling Zhang) [PDF]
  • A Discrete-Event Simulation Model for the Bitcoin Blockchain Network with Strategic Miners and Mining Pool Managers. Computers and Operations Research. Vol. 134, 105365-105394, 2021. (With Kejun Li, Yining Huang and Hong Wan) [PDF]
  • Mind Your Own Customers and Ignore the Others: Asymptotic Optimality of A Local Policy In Multiclass Queueing Systems with Customer Feedback. IISE Transactions. Vol. 54, No. 4, 363-375, 2022. (with Jiankui Yang and Junfei Huang) [PDF]
    • Appendix [PDF]
  • Scheduling to Differentiate Service in a Multiclass Service System. Operations Research. Vol. 70, No. 1, 527-544, 2022. (with Xu Sun and Kyle Hovey) [PDF]
    • e-Companion [PDF]
    • Longer online appendix [PDF]
  • Pay to Activate Service in Vacation Queueing Systems. Production and Operations Management.  Vol. 31, 2609–2627. 2022. (with Zhongbin Wang and Lei Fang) [PDF]
    • Appendix [PDF]
  • Make Waiting Not to Seem like Waiting: Capacity Management of Waiting-Area Entertainment. Vol. 50, No.6, 745-752, 2022. Operations Research Letters. (with Ke Sun and Xiang Li) [PDF]
  • Routing and Staffing in Emergency Departments: A Multiclass Queueing Model with Workload Dependent Service Times. IISE Transactions on Healthcare Systems Engineering. (with Siddhartha Nambiara and Maria Mayorga) [PDF]
  • Optimal Interventions of Infectious Disease. Naval Research Logistics. (with Xu sun) [PDF]
  • Mail back or in-store dropoff? Optimal design of product-exchange policies in omnichannel retailing systems. OMEGA. (with Ke Sun and Xiang Li) [PDF]
  • An Online Learning Approach to Dynamic Pricing and Capacity Sizing in Service Systems. Submitted to Operations Research. (with Xinyun Chen and Guiyu Hong) [PDF]
    • e-Companion [PDF]

Conference Proceedings, Extended Abstract and Others

  • A Fluid Approximation for Large-Scale Service Systems. Performance Evaluation Review, Special issue on 2011 MAMA conference. (With Ward Whitt) [PDF]
  • A Fluid Model for Many-Server Queues with Time-Varying Arrivals and Phase-Type Service Distribution. Performance Evaluation Review, Special issue on 2012 MAMA conference. (With Ward Whitt) [PDF]
  • Introduction to Levy Processes. Encyclopedia of Operations Research and Management Science. 2013. (With Chien-Chia Huang) [PDF]
  • Combined Inversion and Thinning Methods for Simulating Nonstationary Non-Poisson Arrival Processes. Proceedings of the 2015 Winter Simulation Conference. (With Ran Liu, Michael E. Kuhl and James R. Wilson) [PDF]
  • Capturing Miner and Mining Pool Decisions in a Bitcoin Blockchain Network: A Two-Layer Simulation Model. Proceedings of the 2020 Winter Simulation Conference. (With Kejun Li, Hong Wan and Ling Zhang) [PDF]

  • Reinforcement Learning for Volt-Var Control: A Novel Two-stage Progressive Training Strategy. 2022 IEEE Power & Energy Society General Meeting (PESGM), Denver, 2022, pp. 1-5 (with Si Zhang, Mingzhi Zhang, Rongxing Hu, David Lubkeman, and Ning Lu)

  • Real-Time Estimation for the Waiting Time Distributions in Time-Varying Queues. Proceedings of the 2023 Winter Simulation Conferences. (With Kurtis Konrad)

  • Achieving Stable Service-Level Targets in Time-Varying Service Systems. A Simulation-based Offline Learning Staffing Algorithm. Proceedings of the 2023 Winter Simulation Conferences. (With Kurtis Konrad)