CONFIDENTIAL RELATIONSHIP STRENGTH ESTIMATION APPARATUS, CONFIDENTIAL RELATIONSHIP STRENGTH ESTIMATION METHOD, EVALUATION VALUE PREDICTION APPARATUS, EVALUATION VALUE PREDICTION METHOD AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To estimate the strength of a confidential relationship between users.;SOLUTION: Initial values of a user feature parameter, an item feature parameter and a strength parameter are set by a parameter initial value setting section 3. A confidential relationship strength estimation section 24 updates values of the user feature parameter, the item feature parameter and the strength parameter in accordance with an evaluation function using an error between an evaluation value which is estimated on the basis of the user feature parameter, the item feature parameter, the strength parameter and evaluation values of other users, and an evaluation value of observation data. By repeating updating of the user feature parameter, the item feature parameter and the strength parameter until convergence is determined by a convergence determination section 25, the user feature parameter, the item feature parameter and the strength parameter are optimized and outputted by an output section 3.;COPYRIGHT: (C)2012,JPO&INPIT