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IEICE TRANSACTIONS on Information

A Novel Anomaly Detection Framework Based on Model Serialization

Byeongtae PARK, Dong-Kyu CHAE

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Summary :

Recently, multivariate time-series data has been generated in various environments, such as sensor networks and IoT, making anomaly detection in time-series data an essential research topic. Unsupervised learning anomaly detectors identify anomalies by training a model on normal data and producing high residuals for abnormal observations. However, a fundamental issue arises as anomalies do not consistently result in high residuals, necessitating a focus on the time-series patterns of residuals rather than individual residual sizes. In this paper, we present a novel framework comprising two serialized anomaly detectors: the first model calculates residuals as usual, while the second one evaluates the time-series pattern of the computed residuals to determine whether they are normal or abnormal. Experiments conducted on real-world time-series data demonstrate the effectiveness of our proposed framework.

Publication
IEICE TRANSACTIONS on Information Vol.E107-D No.3 pp.420-423
Publication Date
2024/03/01
Publicized
2023/11/21
Online ISSN
1745-1361
DOI
10.1587/transinf.2023EDL8024
Type of Manuscript
LETTER
Category
Artificial Intelligence, Data Mining

Authors

Byeongtae PARK
  Hanyang University
Dong-Kyu CHAE
  Hanyang University

Keyword