Scalable SUM-Shrinkage Schemes for Distributed Monitoring Large-Scale Data Streams
Scalable SUM-Shrinkage Schemes for Distributed Monitoring Large-Scale Data Streams
复制标题
用于分布式监控大规模数据流的可扩展 SUM 收缩方案
DOI:
10.5705/ss.202015.0316
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
Y. Mei
中科院分区:
文献类型:
--
作者:
Kun Liu;Ruizhi Zhang;Y. Mei
In this article, motivated by biosurveillance and censoring sensor networks, we investigate the problem of distributed monitoring large-scale data streams where an undesired event may occur at some unknown time and affect only a few unknown data streams. We propose to develop scalable global monitoring schemes by parallel running local detection procedures and by combining these local procedures together to make a global decision based on SUM-shrinkage techniques. Our approach is illustrated in two concrete examples: one is the nonhomogeneous case when the pre-change and post-change local distributions are given, and the other is the homogeneous case of monitoring a large number of independent $N(0,1)$ data streams where the means of some data streams might shift to unknown positive or negative values. Numerical simulation studies demonstrate the usefulness of the proposed schemes.