A simple approximation for mean waiting time in M/G/1 queue with vacations and limited service discipline. - Zhe George Zhang; Raymond G. Vickson (Oper. Res. Lett., 1993)

Optimal Two-Threshold Policies in an M/G/1 Queue With Two Vacation Types. - Zhe George Zhang; Raymond G. Vickson; Michel J. A. van Eenige (Perform. Evaluation, 1997)

A simple recursive Markov chain model to determine the optimal replacement policies under general repairs. - Zhe George Zhang; Charles Ernie Love (Comput. Oper. Res., 2000)

A discrete semi-Markov decision model to determine the optimal repair/replacement policy under general repairs. - Charles Ernie Love; Zhe George Zhang; M. A. Zitron; Renkuan G. Guo (Eur. J. Oper. Res., 2000)

Discrete Time Geo/G/1 Queue with Multiple Adaptive Vacations. - Zhe George Zhang; Naishuo Tian (Queueing Syst. Theory Appl., 2001)

The Discrete-Time GI/Geo/1 Queue with Multiple Vacations. - Naishuo Tian; Zhe George Zhang (Queueing Syst. Theory Appl., 2002)

Allocating kanbans for a production system in a general configuration with a new control strategy. - Xiaobo Zhao; Kenichi Nakashima; Zhe George Zhang (IEEE Trans. Syst. Man Cybern. Part A, 2002)

An optimal maintenance policy for skipping imminent preventive maintenance for systems experiencing random failures. - Ali Haj Shirmohammadi; Charles Ernie Love; Zhe George Zhang (J. Oper. Res. Soc., 2003)

Analysis on queueing systems with synchronous vacations of partial servers. - Zhe George Zhang; Naishuo Tian (Perform. Evaluation, 2003)

Stationary Distributions of GI/M/c Queue with PH Type Vacations. - Naishuo Tian; Zhe George Zhang (Queueing Syst. Theory Appl., 2003)

Analysis of Queueing Systems with Synchronous Single Vacation for Some Servers. - Zhe George Zhang; Naishuo Tian (Queueing Syst. Theory Appl., 2003)

An analysis of queueing systems with multi-task servers. - Zhe George Zhang; Naishuo Tian (Eur. J. Oper. Res., 2004)

The N threshold policy for the GI/M/1 queue. - Zhe George Zhang; Naishuo Tian (Oper. Res. Lett., 2004)

A simple computational model for analyzing the properties of stop-loss, take-profit, and price breakout trading strategies. - Art Warburton; Zhe George Zhang (Comput. Oper. Res., 2006)

An extended optimal replacement model of systems subject to shocks. - Yu-Hung Chien; Shey-Huei Sheu; Zhe George Zhang; Ernie Love (Eur. J. Oper. Res., 2006)

A two threshold vacation policy in multiserver queueing systems. - Naishuo Tian; Zhe George Zhang (Eur. J. Oper. Res., 2006)

On the convexity of the two-threshold policy for an M/G/1 queue with vacations. - Zhe George Zhang (Oper. Res. Lett., 2006)

Analysis of multi-server queue with a single vacation (e, d)-policy. - Xiuli Xu; Zhe George Zhang (Perform. Evaluation, 2006)

A Performance Analysis of Call Centers Based on a Multi-server Queue with Retrials, Feedbacks, Impatience. - Zhe George Zhang; Yi-Jun Zhu; Ren-Xiang Zhu (IMECS, 2007)

The optimal service time allocation of a versatile server to queue jobs and stochastically available non-queue jobs of different types. - Zhe George Zhang; Ernie Love; Yu Song (Comput. Oper. Res., 2007)

A Computational Model for Determining the Optimal Preventive Maintenance Policy With Random Breakdowns and Imperfect Repairs. - Ali Haj Shirmohammadi; Zhe George Zhang; Ernie Love (IEEE Trans. Reliab., 2007)

A note on workload control for an under-utilized server of M/G/1 system. - Zhe George Zhang (Comput. Ind. Eng., 2009)

Technical Note - A Risk-Averse Newsvendor Model Under the CVaR Criterion. - Youhua (Frank) Chen; Minghui Xu 002; Zhe George Zhang (Oper. Res., 2009)

Performance Analysis of a Queue with Congestion-Based Staffing Policy. - Zhe George Zhang (Manag. Sci., 2009)

Analysis of the M/G/1 queue with exponentially working vacations - a matrix analytic approach. - Ji-Hong Li; Naishuo Tian; Zhe George Zhang; Hsing Paul Luh (Queueing Syst. Theory Appl., 2009)

A Periodic Replacement Model Based on Cumulative Repair-Cost Limit for a System Subjected to Shocks. - Shey-Huei Sheu; Chin-Chih Chang; Yen-Luan Chen; Zhe George Zhang (IEEE Trans. Reliab., 2010)

A multi-criteria optimal replacement policy for a system subject to shocks. - Chin-Chih Chang; Shey-Huei Sheu; Yen-Luan Chen; Zhe George Zhang (Comput. Ind. Eng., 2011)

An algorithmic analysis of multi-server vacation model with service interruptions. - Jau-Chuan Ke; Chuen-Horng Lin; Hsin-I Huang; Zhe George Zhang (Comput. Ind. Eng., 2011)

Cost evaluation in M/G/1 queue with T-policy revisited, technical note. - Zhe George Zhang; Lotfi Tadj; Messaoud Bounkhel (Eur. J. Oper. Res., 2011)

Forecasting stock indices with back propagation neural network. - Jian-Zhou Wang; Ju-Jie Wang; Zhe-George Zhang; Shu-Po Guo (Expert Syst. Appl., 2011)

Modeling Security-Check Queues. - Zhe George Zhang; Hsing Paul Luh; Chia-Hung Wang (Manag. Sci., 2011)

A note on replacement policy for a system subject to non-homogeneous pure birth shocks. - Shey-Huei Sheu; Chin-Chih Chang; Zhe George Zhang; Yu-Hung Chien (Eur. J. Oper. Res., 2012)

Optimal maintenance policy for a system subject to damage in a discrete time process. - Yu-Hung Chien; Shey-Huei Sheu; Zhe George Zhang (Reliab. Eng. Syst. Saf., 2012)

A Block Replacement Policy for Systems Subject to Non-homogeneous Pure Birth Shocks. - Shey-Huei Sheu; Yen-Luan Chen; Chin-Chih Chang; Zhe George Zhang (IEEE Trans. Reliab., 2012)

Extended optimal replacement policy for a system subject to non-homogeneous pure birth shocks. - Shey-Huei Sheu; Yen-Luan Chen; Chin-Chih Chang; Zhe George Zhang (Comput. Ind. Eng., 2013)

Computational analysis of machine repair problem with unreliable multi-repairmen. - Jau-Chuan Ke; Ying-Lin Hsu; Tzu-Hsin Liu; Zhe George Zhang (Comput. Oper. Res., 2013)

Strategic Queueing Behavior and Its Impact on System Performance in Service Systems with the Congestion-Based Staffing Policy. - Pengfei Guo; Zhe George Zhang (Manuf. Serv. Oper. Manag., 2013)

Optimal Number of Repairs Before Replacement for a System Subject to Shocks of a Non-Homogeneous Pure Birth Process. - Shey-Huei Sheu; Yen-Luan Chen; Chin-Chih Chang; Zhe George Zhang (IEEE Trans. Reliab., 2013)

An Optimal Age Replacement Policy for Multi-State Systems. - Shey-Huei Sheu; Zhe George Zhang (IEEE Trans. Reliab., 2013)

Lifetime properties of a cumulative shock model with a cluster structure. - Jian-Ming Bai; Zhe George Zhang; Ze-Hui Li (Ann. Oper. Res., 2014)

Optimal number of repairs before replacement for a two-unit system subject to non-homogeneous pure birth process. - Shey-Huei Sheu; Tzu-Hsin Liu; Zhe-George Zhang; Tsan-Ming Chang (Comput. Ind. Eng., 2014)

On the Downs-Thomson Paradox in a Self-Financing Two-Tier Queuing System. - Pengfei Guo; Robin Lindsey; Zhe George Zhang (Manuf. Serv. Oper. Manag., 2014)

Analysis of two-tier public service systems under a government subsidy policy. - Wuhua Chen; Zhe George Zhang; Zhongsheng Hua (Comput. Ind. Eng., 2015)

Optimal preventive maintenance and repair policies for multi-state systems. - Shey-Huei Sheu; Chin-Chih Chang; Yen-Luan Chen; Zhe George Zhang (Reliab. Eng. Syst. Saf., 2015)

An extended optimal replacement model for a deteriorating system with inspections. - Shey-Huei Sheu; Hsin-Nan Tsai; Fu-Kwun Wang; Zhe George Zhang (Reliab. Eng. Syst. Saf., 2015)

Extended Optimal Replacement Policy for a Two-Unit System With Shock Damage Interaction. - Shey-Huei Sheu; Tzu-Hsin Liu; Zhe George Zhang; Yu-Hung Chien (IEEE Trans. Reliab., 2015)

Optimal two-threshold replacement policy in a cumulative damage model. - Shey-Huei Sheu; Tzu-Hsin Liu; Zhe-George Zhang; Hsin-Nan Tsai; Jung-Chih Chen (Ann. Oper. Res., 2016)

Strategic behavior and social optimization in a double-ended queue with gated policy. - Fang Wang; Jinting Wang; Zhe George Zhang (Comput. Ind. Eng., 2017)

Groups of Repairmen and Repair-based Load Balancing in Supermarket Models with Repairable Servers. - Na Li; Quan-Lin Li; Zhe George Zhang (CoRR, 2017)

A trivariate optimal replacement policy for a deteriorating system based on cumulative damage and inspections. - Hsin-Nan Tsai; Shey-Huei Sheu; Zhe George Zhang (Reliab. Eng. Syst. Saf., 2017)

A c/μ-Rule for Service Resource Allocation in Group-Server Queues. - Li Xia; Zhe George Zhang; Quan-Lin Li; Peter W. Glynn (CoRR, 2018)

Strategic joining in an M/M/1 queue with risk-sensitive customers. - Jinting Wang; Zhe George Zhang (J. Oper. Res. Soc., 2018)

The generalized age maintenance policies with random working times. - Shey-Huei Sheu; Tzu-Hsin Liu; Zhe-George Zhang; Hsin-Nan Tsai (Reliab. Eng. Syst. Saf., 2018)

Strategic Joining in a Single-Server Retrial Queue with Batch Service. - Ke Sun; Jinting Wang; Zhe George Zhang (QTNA, 2019)

Organizational learning: Approximation of multiple-level learning and forgetting by an aggregated single-level model. - Ilhyung Kim; Mark Springer; Zhe George Zhang; Young-Sun Park (Comput. Ind. Eng., 2019)

On optimal preventive-maintenance policy for generalized Polya process repairable products under free-repair warranty. - Yu-Hung Chien; Zhe George Zhang; Xiaoling Yin (Eur. J. Oper. Res., 2019)

Generalized multi-parameter preventive replacement policy for systems with random processing times. - Chin-Chih Chang; Yen-Luan Chen; Xiaoling Yin; Zhe George Zhang (INFOR Inf. Syst. Oper. Res., 2019)

A possible optimal design of one-way Hamming network H(n, 3) based on the minimum transmission latency. - Yanyan Wen; Guorong Chai; Qiuli Li; Zhe George Zhang (J. Comb. Optim., 2019)

Analysis of price competition in two-tier service systems. - Wuhua Chen; Zhe George Zhang; Zhongsheng Hua (J. Oper. Res. Soc., 2019)

On Downs-Thomson paradox in two-tier service systems with a fast pass and revenue-based capacity investment. - Xiaoling Yin; Zhe George Zhang (J. Oper. Res. Soc., 2019)

Extended optimal preventive replacement policies with random working cycle. - Shey-Huei Sheu; Tzu-Hsin Liu; Zhe-George Zhang (Reliab. Eng. Syst. Saf., 2019)

Optimal replacement policies for a system based on a one-cycle criterion. - Shey-Huei Sheu; Hsin-Nan Tsai; Uan-Yu Sheu; Zhe George Zhang (Reliab. Eng. Syst. Saf., 2019)

Improving the Performance of MMPP/M/C Queue by Convex Optimization-A Real-World Application in Iron and Steel Industry. - Yanhe Jia; Zhe George Zhang; Te Xu (IEEE Access, 2020)

Optimum replacement policy for cumulative damage models based on multi-attributes. - Shey-Huei Sheu; Tzu-Hsin Liu; Zhe-George Zhang; Hsin-Nan Tsai (Comput. Ind. Eng., 2020)

On two-tier healthcare system under capacity constraint. - Wuhua Chen; Zhe George Zhang; Xiaohong Chen (Int. J. Prod. Res., 2020)

A generalized age-dependent minimal repair with random working times. - Shey-Huei Sheu; Tzu-Hsin Liu; Zhe-George Zhang; Xufeng Zhao; Yu-Hung Chien (Comput. Ind. Eng., 2021)

M/PH/C queue under a congestion-based staffing policy with applications in steel industry operations. - Yanhe Jia; Zhe George Zhang; Lixin Tang (Int. J. Prod. Res., 2021)

Editorial. - John E. Boylan; Martin H. Kunc; Saïd Salhi; Zhe George Zhang (J. Oper. Res. Soc., 2021)

Strategic joining in an M/M/K queue with asynchronous and synchronous multiple vacations. - Jinting Wang; Yu Zhang; Zhe George Zhang (J. Oper. Res. Soc., 2021)

Optimal replacement policy with replacement last under cumulative damage models. - Shey-Huei Sheu; Tzu-Hsin Liu; Wei-Teng Sheu; Zhe-George Zhang; Jau-Chuan Ke (Reliab. Eng. Syst. Saf., 2021)

Efficiency-quality trade-off in allocating resource to public healthcare systems. - Jinting Wang; Zhongbin Wang 002; Zhe George Zhang; Fang Wang (Int. J. Prod. Res., 2022)

Operational Research in times of crisis: Experiences with COVID-19. - Martin H. Kunc; John E. Boylan; Saïd Salhi; Zhe George Zhang (J. Oper. Res. Soc., 2023)

Optimal replacement policy for a two-unit system subject to shocks and cumulative damage. - Shey-Huei Sheu; Tzu-Hsin Liu; Wei-Teng Sheu; Jau-Chuan Ke; Zhe George Zhang (Reliab. Eng. Syst. Saf., 2023)

Distortion risk measure under parametric ambiguity. - Hui Shao; Zhe George Zhang (Eur. J. Oper. Res., 2023)

The Generalized c/μ Rule for Queues with Heterogeneous Server Pools. - Zhenghua Long; Hailun Zhang; Jiheng Zhang; Zhe George Zhang (Oper. Res., 2024)

Extreme-Case Distortion Risk Measures: A Unification and Generalization of Closed-Form Solutions. - Hui Shao; Zhe George Zhang (Math. Oper. Res., 2024)

Optimal replacement policy based on number of failures for a system with multiple attempt minimal repairs. - Yu-Hung Chien; Zhe George Zhang (Reliab. Eng. Syst. Saf., 2024)

Editorial to the 75 th volume of the Journal of the Operational Research Society. - Martin H. Kunc; Saïd Salhi; George Zhang 003 (J. Oper. Res. Soc., 2024)

Journal of the Operational Research Society (JORS): The last 40 years. - Saïd Salhi; Graham Rand; John Hough; John C. Ranyard; Terry Williams; John Wilson; Thomas W. Archibald; Jonathan Crook; John E. Boylan; Martin H. Kunc; Zhe George Zhang (J. Oper. Res. Soc., 2024)

Extended replacement policy for a system under shocks effect. - Shey-Huei Sheu; Tzu-Hsin Liu; Wei-Teng Sheu; Yu-Hung Chien; Zhe-George Zhang (Ann. Oper. Res., 2024)

A class of distorted Gaussian copulas: theories and applications. - Hui Shao; Zhe George Zhang (J. Oper. Res. Soc., 2024)

Dockless bike-sharing systems with unusable bikes: removing, repair and redistribution under batch policies. - Rui-Na Fan; Quan-Lin Li; Xiaole Wu; Zhe George Zhang (Ann. Oper. Res., 2025)