| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method, an apparatus and a computer program for calculating a risk assessment value for an event sequence, which are capable of calculating the risk assessment value of each event sequence by estimating a totally ordered set on the basis of a partially ordered set indicating the event sequence. <P>SOLUTION: The risk assessment value of an event sequence that is a partially ordered set indicating some events in an event group of M kinds of events (M is a finite natural number) in a time series is calculated. The partially ordered set is converted into an approximate totally ordered set, and an M-dimensional feature vector is calculated from the totally ordered set obtained by the conversion. A projection matrix for calculating the risk assessment value is calculated based on the calculated M-dimensional feature vector. <P>COPYRIGHT: (C)2013,JPO&INPIT |
