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arXiv 1902.03460math.STstat.TH
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在存在营养变化的情况下最快的变化检测

Quickest Change Detection in the Presence of a Nuisance Change

Tze Siong Lau, Wee Peng Tay

摘要:

在最快的变化检测问题中,其中可能发生的滋扰和关键的变化,其目标是尽可能快地检测到的关键变化,而不发出警报时,无论是没有变化或滋扰的变化已经发生。提出了一种基于广义似然比检验统计量的窗口受限序列变化检测方法。一个递归的更新计划建议的检验统计量的发展,并证明是渐近最优的温和的技术条件下。在变化后的分布属于一个参数化的家庭的情况下,广义的停时和下界的平均运行长度推导。建议的停止规则相比,FMA停时和天真的2阶段的程序,检测的滋扰或关键的变化,使用单独的CuSum停止程序的滋扰和关键的变化。仿真结果表明,该规则优于FMA停时和2阶段的过程,和一个真实的数据集上的轴承故障实验验证了所提出的停时的性能。

英文摘要:

In the quickest change detection problem in which both nuisance and critical changes may occur, the objective is to detect the critical change as quickly as possible without raising an alarm when either there is no change or a nuisance change has occurred. A window-limited sequential change detection procedure based on the generalized likelihood ratio test statistic is proposed. A recursive update scheme for the proposed test statistic is developed and is shown to be asymptotically optimal under mild technical conditions. In the scenario where the post-change distribution belongs to a parametrized family, a generalized stopping time and a lower bound on its average run length are derived. The proposed stopping rule is compared with the FMA stopping time and the naive 2-stage procedure that detects the nuisance or critical change using separate CuSum stopping procedures for the nuisance and critical changes. Simulations demonstrate that the proposed rule outperforms the FMA stopping time and the 2-stage procedure, and experiments on a real dataset on bearing failure verify the performance of the proposed stopping time.

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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