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arXiv 1504.06384math.STstat.TH
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检测变点的局部极值多重检验

Multiple Testing of Local Extrema for Detection of Change Points

Dan Cheng, Zhibing He, Armin Schwartzman

摘要:

提出了一种基于微分平滑和多重检验的变点检测新方法,该方法适用于以分段常数函数和平稳遍历高斯噪声为模型的长数据序列。作为STEM算法在\citet{schwartzman2011multiple}和\citet{cheng2017multiple}中用于峰值检测的应用,该方法在平滑和区分观察序列之后检测变化点作为显著的局部最大值和最小值。该算法,结合Benjamini-Hochberg程序阈值的p值,提供了渐近强控制的错误发现率(FDR)和电源的一致性,作为序列的长度和跳跃的大小变大。仿真结果表明,FDR水平保持在非渐近条件下,并指导平滑带宽的选择。该方法在磁力计传感器数据和基因组阵列CGH数据中示出。R cran中有一个名为“dSTEM”的R包。

英文摘要:

A new approach to detect change points based on differential smoothing and multiple testing is presented for long data sequences modeled as piecewise constant functions plus stationary ergodic Gaussian noise. As an application of the STEM algorithm for peak detection developed in \citet{schwartzman2011multiple} and \citet{cheng2017multiple}, the method detects change points as significant local maxima and minima after smoothing and differentiating the observed sequence. The algorithm, combined with the Benjamini-Hochberg procedure for thresholding p-values, provides asymptotic strong control of the False Discovery Rate (FDR) and power consistency, as the length of the sequence and the size of the jumps get large. Simulations show that FDR levels are maintained in non-asymptotic conditions and guide the choice of smoothing bandwidth. The methods are illustrated in magnetometer sensor data and genomic array-CGH data. An R package named "dSTEM" is available in R cran.

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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