Anomalous system state identification
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United States of America Patent
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Jul 12, 2016
Grant Date -
Apr 23, 2015
app pub date -
Nov 13, 2014
filing date -
May 15, 2012
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Abstract
A real-time method and data processing apparatus for identifying an anomalous state of a system are described. The system includes a sensor outputting time series data items relating to a property of the system. A current data item is received from the sensor. An estimate of a current data density for the time series data items is recursively estimated using the current data item. At least one statistical property of the estimate of the current data density is recursively calculated. It is determined, from the at least one statistical property, whether the current data item indicates an anomalous state of the system. A signal is output if it is determined that the current data item indicates an anomalous state of the system.
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