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arXiv 2008.02365stat.ME
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存在离群值的序贯变点检验:基于密度幂离的方法

Sequential change point test in the presence of outliers: the density power divergence based approach

Junmo Song

摘要:

在这项研究中,我们考虑的问题,特别是在存在离群值的监测参数的变化。为了提出一个对离群值具有鲁棒性的顺序过程,我们使用密度功率发散来推导出构成我们过程的检测器和停止时间。首先,我们调查的渐近性质,我们的顺序程序独立同分布。序列,然后将所提出的程序扩展到平稳的时间序列模型,在那里我们提供了一组充分条件,在该条件下,所提出的程序具有渐近控制的大小和一致性的权力。作为一个应用,我们的程序被应用到Gestival模型。我们通过仿真研究证明了所提出的方法的有效性和鲁棒性。最后,两个真实的数据分析,以说明所提出的顺序过程的有用性。

英文摘要:

In this study, we consider a problem of monitoring parameter changes particularly in the presence of outliers. To propose a sequential procedure that is robust against outliers, we use the density power divergence to derive a detector and stopping time that make up our procedure. We first investigate the asymptotic properties of our sequential procedure for i.i.d. sequences, and then extend the proposed procedure to stationary time series models, where we provide a set of sufficient conditions under which the proposed procedure has an asymptotically controlled size and consistency in power. As an application, our procedure is applied to the GARCH models. We demonstrate the validity and robustness of the proposed procedure through a simulation study. Finally, two real data analyses are provided to illustrate the usefulness of the proposed sequential procedure.

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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