SYNONYM ESTIMATION DEVICE, SYNONYM ESTIMATION METHOD, AND SYNONYM ESTIMATION PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a synonym estimation device, a synonym estimation method, and a synonym estimation program, capable of more accurately specifying a synonym similar to a query required for retrieval.;SOLUTION: A synonym estimation device 10 generates a plurality of functions that calculate a new feature value by performing a weighting operation on a plurality of feature values to learn weighting of the plurality of feature values and the new feature value, and weighting of a combined feature value of the functions, the weighting enabling character strings registered in learning data 30 to be determined in a descending order of similarity. The synonym estimation device 10 calculates a new feature value for a plurality of synonym candidates retrieved from a query by using a function obtained after learning from the plurality of feature values to specify a synonym similar to the inputted query on the basis of a calculation result obtained by calculating the plurality of feature values and the calculated new feature value with the learned weighting.;COPYRIGHT: (C)2014,JPO&INPIT