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arXiv 1901.03036math.STstat.TH
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非平稳时间序列的非参数多变点检测

Nonparametric Multiple Change Point Detection for Non-Stationary Times Series

Zixiang Guan, Gemai Chen

摘要:

本文研究了非平稳时间序列中变点检测的非参数方法。该方法将时间序列分成若干段,使得相邻两段之间的归一化谱密度函数不同。该理论基于这样的假设,即在每个段内,时间序列是线性过程,这意味着我们的方法不仅适用于经典的时间序列模型,例如,因果可逆ARMA过程,但也保持了良好的性能为非可逆移动平均过程。我们证明了我们对变点的估计是一致的。此外,贝叶斯信息准则被应用于一致地估计变点的成员。模拟结果以及经验的结果将被呈现。

英文摘要:

This article considers a nonparametric method for detecting change points in non-stationary time series. The proposed method will divide the time series into several segments so that between two adjacent segments, the normalized spectral density functions are different. The theory is based on the assumption that within each segment, time series is a linear process, which means that our method works not only for classic time series models, e.g., causal and invertible ARMA process, but also preserves good performance for non-invertible moving average process. We show that our estimations for change points are consistent. Also, a Bayesian information criterion is applied to estimate the member of change points consistently. Simulation results as well as empirical results will be presented.

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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