Detecting Abnormal Ozone Measurements With a Deep Learning-Based Strategy

Air quality management and monitoring are vital to maintaining clean air, which is necessary for the health of human, vegetation, and ecosystems. Ozone pollution is one of the main pollutants that negatively affect human health and ecosystems. This paper reports the development of an unsupervised and efficient scheme to detecting anomalies in unlabeled ozone measurements. This scheme combines a deep belief networks (DBNs) model and a one-class support vector machine (OCSVM). The DBN model accounts for nonlinear variations in the ground-level ozone concentrations, while OCSVM detects the abnormal ozone measurements. The performance of this approach is evaluated using real data from Isère in France. We also compare the detection quality of DBN-based detection schemes to that of deep stacked auto-encoders, restricted Boltzmann machines-based OCSVM, and DBN-based clustering procedures (i.e., K-means, Birch, and expectation–maximization). The results show that the developed strategy is able to identify anomalies in ozone measurements.

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