| 摘要 |
PROBLEM TO BE SOLVED: To estimate a secular change of a cluster by estimating the presence of the cluster of an object from a time series of relational data representing the presence of a relationship between and among a plurality of objects. SOLUTION: A mathematical model of a known IRM (Infinite Relational Model) is represented using an affiliation cluster z, an inter-cluster relational degreeη, an mixing ratioβ, and relational data x. The IRM is expanded, and a parameterπrepresenting a secular change of the cluster is introduced. The estimating method of the affiliation cluster z is also modified to take a time into account. Affiliation cluster z estimation calculation (step S104), secular charge informationπestimation calculation (step S105), inter-cluster relational degreeηestimation calculation (step S106), a mixing ratioβestimation calculation (step S107) shown in the Fig.1 are executed repeatedly until a completion state is met for calculating an estimated value of each parameter. COPYRIGHT: (C)2011,JPO&INPIT |
