DEVICE, METHOD AND PROGRAM FOR DETECTING ANOMALY, AND RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To properly detect an anomaly based on direction data continuously obtained from an object of monitoring. SOLUTION: The device for detecting the anomaly comprises: a direction data generating part that generates direction data showing characteristics of data to be monitored sequentially in correspondence with the respective data to be monitored sequentially inputted; a degree of difference calculating part that calculates a degree of difference of the direction data to a standard vector; a moment updating part that updates a moment of the distribution of the degree of difference when the direction data are made into a model by the multidimensional probability distribution based on the degree of difference of the direction data in correspondence with the new data to be monitored; a parameter calculating part that calculates a parameter that determines the dispersion of the multidimensional probability distribution based on the moment; a threshold value calculating part that calculates a threshold value of the degree of difference based on the multidimensional probability distribution of which dispersion has been determined by the parameter; and an anomaly detecting part that detects an anomaly of data to be monitored corresponding to the degree of difference in the event that the degree of difference exceeds the threshold value. COPYRIGHT: (C)2006,JPO&NCIPI