报告题目：Reducing Delay in Retrial Queues by Simultaneously Differentiating Service and Retrial Rates

　　报告人：中央财经大学管理科学与工程学院副经理 王金亭 教授

　　时间：5月28日 16:30-18:00

　　腾讯会议号：805185020

　　内容简介：

　　In this talk, we introduce a service grade differentiation policy for queueing models with customer retrials. We show that the average waiting time can be reduced through strategically allocating the rates of service and retrial times without needing additional service capacity. Countering to the intuition that higher service variability usually yields a larger delay, we show that the benefits of our simultaneous service-and-retrial differentiation policy outweigh the impact of the increased service variability. We present a necessary and sufficient condition under which the proposed policy reduces the waiting time and a closed-form expression for the optimal allocation policy. In heavy traffic, our policy can asymptotically reduce both the delay and the number of retrials before entering service by a significant factor, which is a function of the ratio of the service rate to the retrial rate.

　　报告人简介：

　　王金亭，博士，教授，博士生导师，中央财经大学管理科学与工程学院副经理。主要研究领域是随机服务与运作管理、排队论、可靠性理论、供应链优化与管理等。在OR、POM、OMEGA、Queueing Systems、EJOR、Naval Research Logistics、IEEE Transactions on Vehicular Technology、Annals of OR等期刊上共发表130余篇学术论文，包括90余篇SCI/SSCI检索论文。2016年出版专著《排队博弈论基础》。现任中国运筹学会可靠性分会理事长、中国运筹学会理事等。2006年获得教育部霍英东教育基金会第十届高等院校青年教师奖，2011年入选教育部新世纪优秀人才支持计划，2018年获得詹天佑铁道科学技术奖专项科技奖。

　　（承办：科研与学术交流中心）