Anomaly detection: A functional analysis perspective
Anomaly detection: A functional analysis perspective
复制标题
异常检测:功能分析视角
DOI:
10.1016/j.jmva.2021.104885
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发表时间:
2022
影响因子:
1.6
通讯作者:
Kon, Mark
中科院分区:
文献类型:
--
作者:
Castrillón-Candás, Julio E.;Kon, Mark
We develop a new approach for detecting anomalies in the behavior of stochastic processes and random fields. The approach uses tensor product representations, in particular the multivariate Karhunen–Loève (KL) expansion on complex domains. From the associated eigenspaces of the covariance operator a series of nested function spaces are constructed, allowing detection of signals lying in orthogonal subspaces. In particular this can succeed even if the stochastic behavior of the signal changes either in a global or local sense. A mathematical approach is developed to locate and measure sizes of extraneous components based on construction of multilevel nested subspaces. We show examples in R and on a spherical domain S 2. However, the method is flexible, allowing the detection of orthogonal signals on general topologies, including spatio-temporal domains.
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DOI:
10.1109/78.972484
发表时间:
2002
期刊:
IEEE Trans. Signal Process.
影响因子:
--
作者:
J. Castrillón;K. Amaratunga
通讯作者:
K. Amaratunga
DOI:
10.1080/01621459.2017.1286240
发表时间:
2018-01-01
影响因子:
3.7
作者:
Arias-Castro, Ery;Castro, Rui M.;Wang, Meng
通讯作者:
Wang, Meng
影响因子:
0.9
作者:
Dominik Wied;Pedro Galeano
通讯作者:
Dominik Wied;Pedro Galeano
影响因子:
1.9
作者:
Fremdt, Stefan
通讯作者:
Fremdt, Stefan
影响因子:
2.5
作者:
Arias-Castro, E;Donoho, DL;Huo, XM
通讯作者:
Huo, XM