Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
December 22, 2009
Patent Application Number
11443921
Date Filed
May 31, 2006
Patent Primary Examiner
Patent abstract
A statistical value update unit calculates the fluctuation of measurement data. A filtering processing unit extracts a normal white noise component from the fluctuation of the measurement data using an adaptive lattice filter. A statistical test unit determines whether or not the variance of the normal white noise component is out of a predetermined scope in reference distribution. A change decision unit detects a stationary change of the status of a target system based on a detection ratio of an outlier.
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