High-dimensional change-point detection under sparse alternatives
稀疏备择下的高维变点检测AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要直接研究序列均值变化的变点检测、检测边界与稀疏适应性,对应结构变化方法,但没有指定宏观应用。
稀疏备择下的高维变点检测AI 解读 ↓
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We consider the problem of detecting a change in mean in a sequence of high-dimensional Gaussian vectors. The change in mean may be occurring simultaneously in an unknown subset components. We propose a hypothesis test to detect the presence of a change-point and establish the detection boundary in different regimes under the assumption that the dimension tends to infinity and the length of the sequence grows with the dimension. A remarkable feature of the proposed test is that it does not require any knowledge of the subset of components in which the change in mean is occurring and yet automatically adapts to yield optimal rates of convergence over a wide range of statistical regimes.