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arXiv 2402.03565stat.ME
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基于断点的在线异常检测

Breakpoint based online anomaly detection

Etienne Krönert, Dalila Hattab, Alain Celisse

AI总结:

针对在线时间序列中参考分布突变导致异常检测困难的问题,提出基于断点检测的实时自适应方法,并扩展平稳序列方法控制错误发现率,提升检测准确性。

摘要:

异常检测的目标是识别由与界定正常行为的参考分布不同的分布所生成的观测值。在检查时间序列时,参考分布可能随时间演变。因此,异常检测器必须能够适应这种变化。在在线环境中,适应突然且不可预测的变化尤其困难。我们对此问题的解决方案基于断点检测,以便实时适应序列的新参考行为,并提高异常检测的准确性。该解决方案还通过扩展为平稳序列开发的方法,提供了对错误发现率的控制。

英文摘要:

The goal of anomaly detection is to identify observations that are generated by a distribution that differs from the reference distribution that qualifies normal behavior. When examining a time series, the reference distribution may evolve over time. The anomaly detector must therefore be able to adapt to such changes. In the online context, it is particularly difficult to adapt to abrupt and unpredictable changes. Our solution to this problem is based on the detection of breakpoints in order to adapt in real time to the new reference behavior of the series and to increase the accuracy of the anomaly detection. This solution also provides a control of the False Discovery Rate by extending methods developed for stationary series.

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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