| 摘要 |
<P>PROBLEM TO BE SOLVED: To avoid that a pair cannot be extracted by a fact that a co-occurrence frequency is low, and to appropriately extract the pair without causing noise even when adding the co-occurrence frequencies together. <P>SOLUTION: A keyword place name pair extraction device refers to a geographic database on the basis of an input keyword and a place name, acquires an aggregate of partial areas belonging to the place name, refers to a frequency database on the basis of each area of the partial area aggregate, acquires a whole frequency corresponding to the area and a co-occurrence frequency with the keyword of the area, and when determining that the keyword is widely distributed in the area in which the key word represents the place name, on the basis of the whole frequency and the co-occurrence frequency with the keyword, adds the co-occurrence frequencies of the partial areas together to update the frequency database, and when an aggregate of a pair of the keyword and the place name is input, searches the frequency database on the basis of the aggregate to extract a pair of a keyword and a place name other than the input pair. <P>COPYRIGHT: (C)2013,JPO&INPIT |
