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- W2772474032 abstract "Advanced computing and data acquisition technologies have made possible the collection of high-dimensional data streams in many fields. Efficient online monitoring tools which can correctly identify any abnormal data stream for such data are highly sought after. However, most of the existing monitoring procedures directly apply the false discover rate (FDR) controlling procedure to the data at each time point, and the FDR at each time point (the point-wise FDR) is either specified by users or determined by the in-control (IC) average run length (ARL). If the point-wise FDR is specified by users, the resulting procedure lacks control of the global FDR and keeps users in the dark in terms of the IC-ARL. If the point-wise FDR is determined by the IC-ARL, the resulting procedure does not give users the flexibility to choose the number of false alarms (Type-I errors) they can tolerate when identifying abnormal data streams, which often makes the procedure too conservative. To address those limitations, we propose a two-stage monitoring procedure that can control both the IC-ARL and Type-I errors at the levels specified by users. As a result, the proposed procedure allows users to choose not only how often they expect any false alarms when all data streams are IC, but also how many false alarms they can tolerate when identifying abnormal data streams. With this extra flexibility, our proposed two-stage monitoring procedure is shown in the simulation study and real data analysis to outperform the exiting methods." @default.
- W2772474032 created "2017-12-22" @default.
- W2772474032 creator A5027835055 @default.
- W2772474032 date "2017-12-13" @default.
- W2772474032 modified "2023-09-27" @default.
- W2772474032 title "A Two-stage Online Monitoring Procedure for High-Dimensional Data Streams" @default.
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- W2772474032 doi "https://doi.org/10.48550/arxiv.1712.05074" @default.
- W2772474032 hasPublicationYear "2017" @default.
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