Real-time anomaly detection based on long short-Term memory and Gaussian Mixture Model

Anomaly detection is a long-standing problem in system designation. High-quality anomaly detection can benefit plenty of applications (e.g. system monitoring, disaster precaution and intrusion detection). Most of the existing anomalies detection algorithms are less competent for both effectiveness and real-time capability requirements simultaneously. Therefore, in this paper, the LGMAD, a real-time anomaly detection algorithm based on Long-Short Term Memory (LSTM) and Gaussian Mixture Model (GMM)is proposed. Specifically, we evaluate the real-time anomalies of each univariate sensing time-series via LSTM model, and then a Gaussian Mixture Model is adopted to give a multidimensional joint detection of possible anomalies. Both NAB dataset and self-made dataset are employed to verify our approach. Extensive experiments are conducted to demonstrate the superiority of LGMAD compared to existing anomaly detection algorithms. (C) 2019 Published by Elsevier Ltd.