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arXiv 1706.00514stat.ML
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多维序列变点检测的选择性推理

Selective Inference for Change Point Detection in Multi-dimensional Sequences

Yuta Umezu, Ichiro Takeuchi

摘要:

我们研究的问题,检测变化点(CP),其特征在于在一个多维序列中的一个子集的尺寸。用于检测这些CP的方法可以被公式化为两阶段方法:一个用于选择相关维度,另一个用于选择CP。由于必须适当地校正每个阶段中的选择偏差,因此难以适当地控制这些CP检测方法的错误检测概率。我们在本文中的主要贡献是制定一个CP检测问题作为一个选择性的推理问题,并表明,精确(非渐近)推理是可能的一类CP检测方法。我们通过数值模拟和它的应用程序,我们的激励医疗数据分析问题的建议选择性推理框架的性能。

英文摘要:

We study the problem of detecting change points (CPs) that are characterized by a subset of dimensions in a multi-dimensional sequence. A method for detecting those CPs can be formulated as a two-stage method: one for selecting relevant dimensions, and another for selecting CPs. It has been difficult to properly control the false detection probability of these CP detection methods because selection bias in each stage must be properly corrected. Our main contribution in this paper is to formulate a CP detection problem as a selective inference problem, and show that exact (non-asymptotic) inference is possible for a class of CP detection methods. We demonstrate the performances of the proposed selective inference framework through numerical simulations and its application to our motivating medical data analysis problem.

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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