两类具有N-策略和单重休假的M/G/1排队系统的最优控制策略

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  • 四川师范大学数学科学学院, 四川成都 610068
唐应辉  E-mail: tangyh@sicnu.edu.cn

收稿日期: 2020-01-31

  网络出版日期: 2021-12-11

基金资助

国家自然科学基金(71571127)

Optimal control strategies for two types of M/G/1 queueing systems with N-strategy and single vacation

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  • School of Mathematical Sciences, Sichuan Normal University, Chengdu 610068, Sichuan, China

Received date: 2020-01-31

  Online published: 2021-12-11

摘要

本文考虑两类具有N-策略和服务员单重休假的M/G/1排队系统,其中一类是休假不可中断,另一类是休假可中断。利用系统稳态队长的随机分解特性导出稳态队长的概率母函数,并讨论了系统空闲率与附加平均队长对系统一些参数的敏感性。进一步,在建立费用结构的基础上,应用更新报酬过程理论导出了系统长期运行单位时间内所产生的成本期望费用的显示表达式,同时通过数值计算实例确定了使得系统在长期运行单位时间内所产生的成本期望费用最小的控制策略N*,以及当休假时间为定长T时的二维最优控制策略(N*T*)。

本文引用格式

唐蓓蕾, 唐应辉 . 两类具有N-策略和单重休假的M/G/1排队系统的最优控制策略[J]. 运筹学学报, 2021 , 25(4) : 15 -30 . DOI: 10.15960/j.cnki.issn.1007-6093.2021.04.002

Abstract

This paper considers two types of M/G/1 queueing systems with N-strategy and single vacation, one of which is uninterruptible on vacation and the other is of interruptible on vacation. Using the stochastic decomposition of the steady-state queue length, the expressions of the probability generating function of the steady-state queue length are obtained. And the sensitivity of the system's idle rate and the additional average queue-length towards system parameters is discussed. Furthermore, the explicit expressions of the long-run expected cost per unit time are derived under a given cost structure. At the same time, numerical calculation examples are used to determine the control strategy N* for minimizing the long-run expected cost per unit time as well as the combined control strategy (N*, T*) when the vacation time is fixed duration T.

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