Nec Corporation

Hang Li

Kenji Yamanishi

An object of the present invention is to analyze questionnaire replies automatically from questionnaire reply statements including free reply description in natural language collected through a network, by using a text classification engine, and to issue the analysis results of the claimant as the knowledge in the rule formats. Questionnaire respondents send questionnaire reply statements from respondent computers. Questionnaire reply statements are accumulated in a database through a network. A text classification engine reads out accumulated questionnaire reply statements from the database, and learns the rules for classifying the questionnaire reply statements, and issues them to the claimant.

Questionnaire analysis system

A document classification system and method classifies words into word clusters. Word clusters are arranged for categories of documents and a word falls into a word cluster at a probability. A linear combination model using a distribution of word clusters in a category and a distribution of words in the word cluster probabilistically indicates whether a document is in a particular category.

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Tokyo, Japan

Hang Li