| 摘要 |
PROBLEM TO BE SOLVED: To reduce a calculation cost in retrieving retrieval words by previously performing the calculation of distances or similarities between the feature vectors of words constituting the retrieval words and the feature vectors of documents to be retrieved. SOLUTION: In a step S3 for selecting the documents to be retrieved from the aggregation of the documents to be retrieved, a retrieval result determining means selects the documents to be retrieved corresponding to the distances from the aggregation of the documents to be retrieved in the ascending order of the distances between the feature vectors of the retrieval words and the feature vectors of the documents to be retrieved, which are calculated by obtaining, with the use of the weights of the words, the weightsum of the distances between the feature vectors of the words constituting the prescribed retrieval words and the feature vectors of the documents to be retrieved, which are previously calculated via steps S1, S2. The similarities may be adapted in place of the distances. In this case, the documents to be retrieved corresponding to the similarities are selected from the aggregation of the documents to be retrieved in the descending order of the similarities. COPYRIGHT: (C)2011,JPO&INPIT |
