作者
Stratis Kanarachos, Stavros-Richard G Christopoulos, Alexander Chroneos, Michael E Fitzpatrick
发表日期
2017/11/1
期刊
Expert Systems with Applications
卷号
85
页码范围
292-304
出版商
Pergamon
简介
The quest for more efficient real-time detection of anomalies in time series data is critically important in numerous applications and systems ranging from intelligent transportation, structural health monitoring, heart disease, and earthquake prediction. Although the range of application is wide, anomaly detection algorithms are usually domain specific and build on experts’ knowledge. Here a new signal processing algorithm – inspired by the deep learning paradigm – is presented that combines wavelets, neural networks, and Hilbert transform. The algorithm performs robustly and is transferable. The proposed neural network structure facilitates learning short and long-term pattern interdependencies; a task usually hard to accomplish using standard neural network training algorithms. The paper provides guidelines for selecting the neural network's buffer size, training algorithm, and anomaly detection features. The …
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