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2008
Springer

Spatiotemporal Anomaly Detection in Gas Monitoring Sensor Networks

12 years 26 days ago
Spatiotemporal Anomaly Detection in Gas Monitoring Sensor Networks
In this paper3 , we use Bayesian Networks as a means for unsupervised learning and anomaly (event) detection in gas monitoring sensor networks for underground coal mines. We show that the Bayesian Network model can learn cyclical baselines for gas concentrations, thus reducing false alarms usually caused by flatline thresholds. Further, we show that the system can learn dependencies between changes of concentration in different gases and at multiple locations. We define and identify new types of events that can occur in a sensor network. In particular, we analyse joint events in a group of sensors based on learning the Bayesian model of the system, contrasting these events with merely aggregating single events. We demonstrate that anomalous events in individual gas data might be explained if considered jointly with the changes in other gases. Vice versa, a network-wide spatiotemporal anomaly may be detected even if individual sensor readings were within their thresholds. The presented ...
X. Rosalind Wang, Joseph T. Lizier, Oliver Obst, M
Added 25 Dec 2009
Updated 25 Dec 2009
Type Conference
Year 2008
Where EWSN
Authors X. Rosalind Wang, Joseph T. Lizier, Oliver Obst, Mikhail Prokopenko, Peter Wang
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