| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for retrieving similar documents, whose retrieving performance is improved by combining two or more similarity calculated by two or more different methods and a recommended article communication service system, using the similar document retrieving method. SOLUTION: A reference document and plural documents to be retrieved are inputted (steps S11 and S13), and each similarity of the plural documents to be retrieved is calculated by similarity calculation using a probability type module by IWAYAMA et al. and similarity calculation, using a polynomial distribution model (a step S15), and normalized (a step S17), and linear discrimination is conducted for each normalized similarity (a step S19), and discrimination of similarity or non-similarity is conducted (a step S21).
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