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arXiv 1107.2873math.PR
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分段Ornstein-Uhlenbeck过程的正常返性与公共二次李雅普诺夫函数

Positive recurrence of piecewise Ornstein-Uhlenbeck processes and common quadratic Lyapunov functions

A. B. Dieker, Xuefeng Gao

摘要:

本文研究了具有相位型服务需求的多服务台排队系统中的分段Ornstein-Uhlenbeck扩散过程的正常返性。这些扩散过程在状态空间的两个区域中表现出不同的行为,对应于“过载”(服务需求超过容量)和“欠载”(服务容量超过需求)。这两个制度导致标准的技术证明正复发失败。利用和扩展的框架,常见的二次李雅普诺夫函数的控制理论,我们构造的扩散近似的李雅普诺夫函数与放弃和没有系统。利用这些李雅普诺夫函数,我们证明了分段随机过程具有唯一的平稳分布。

英文摘要:

We study the positive recurrence of piecewise Ornstein-Uhlenbeck (OU) diffusion processes, which arise from many-server queueing systems with phase-type service requirements. These diffusion processes exhibit different behavior in two regions of the state space, corresponding to "overload" (service demand exceeds capacity) and "underload" (service capacity exceeds demand). The two regimes cause standard techniques for proving positive recurrence to fail. Using and extending the framework of common quadratic Lyapunov functions from the theory of control, we construct Lyapunov functions for the diffusion approximations corresponding to systems with and without abandonment. With these Lyapunov functions, we prove that piecewise OU processes have a unique stationary distribution.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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