Mitsubishi Denki Kabushiki Kaisha

Akitoshi Mitsuishi

Yasushi Obata

A candidate-itemset generating unit generates a candidate-itemset composed of at least one candidate item to be included in the left hand side or the right hand side of the association rule. A candidate-itemset verifying unit selects itemsets having frequencies (appearing times in the database) more than the minimum frequency out of the candidate-itemsets, as large-itemsets. A candidate rule generating unit generates candidate association rules based on a large-itemset of k&minus;1 long and a large-itemset of 1 long. A chi-square testing unit generates an association rule set based on the candidate association rules by performing a chi-square test in which a &khgr; statistics and a significant level are used as parameters.

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Tokyo, Japan

Akitoshi Mitsuishi