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Journal of Zhejiang University SCIENCE A 2004 Vol.5 No.1 P.8-15


An efficient algorithm for mining closed itemsets

Author(s):  LIU Jun-qiang, PAN Yun-he

Affiliation(s):  Institute of Artificial Intelligence, Zhejiang University, Hangzhou 310027, China; more

Corresponding email(s):   liujunq@mail.hz.zj.cn

Key Words:  Knowledge discovery, Data mining, Frequent closed patterns, Association rules

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LIU Jun-qiang, PAN Yun-he. An efficient algorithm for mining closed itemsets[J]. Journal of Zhejiang University Science A, 2004, 5(1): 8-15.

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This paper presents a new efficient algorithm for mining frequent closed itemsets. It enumerates the closed set of frequent itemsets by using a novel compound frequent itemset tree that facilitates fast growth and efficient pruning of search space. It also employs a hybrid approach that adapts search strategies, representations of projected transaction subsets, and projecting methods to the characteristics of the dataset. Efficient local pruning, global subsumption checking, and fast hashing methods are detailed in this paper. The principle that balances the overheads of search space growth and pruning is also discussed. Extensive experimental evaluations on real world and artificial datasets showed that our algorithm outperforms CHARM by a factor of five and is one to three orders of magnitude more efficient than CLOSET and MAFIA.

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[9] Zaki, M.J. and Hsiao, C.J., 2002. CHARM: An Efficient Algorithm for Closed Itemset Mining. In: The 2nd SIAM International Conference on Data Mining, Arlington, VA, USA.

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