Online kernel CUSUM for change-point detection
用于变点检测的在线核 CUSUM 方法AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要直接研究在线变点检测及检测延迟,对应结构变化方法,但未限定宏观经济应用。
用于变点检测的在线核 CUSUM 方法AI 解读 ↓
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Abstract We present a computationally efficient online kernel Cumulative Sum method for change-point detection that utilizes the maximum over a set of kernel statistics to account for the unknown change-point location. Our approach exhibits increased sensitivity to small changes compared to existing kernel-based change-point detection methods, including the Scan-B statistic, corresponding to a non-parametric Shewhart chart-type procedure. We provide accurate analytic approximations for two key performance metrics: the average run length (ARL) and expected detection delay, which enable us to establish an optimal window length to be on the order of the logarithm of ARL to ensure minimal power loss relative to an oracle procedure with infinite memory. Moreover, we introduce a recursive calculation procedure for detection statistics to ensure constant computational and memory complexity, which is essential for online implementation. Through extensive experiments on both simulated and real data, we demonstrate the competitive performance of our method and validate our theoretical results.
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