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    題名: A Search Space Reduced Algorithm for Mining Frequent Patterns
    作者: Yen, Show-Jane;Wang, Chiu-Kuang;Ouyang, Liang-Yuh
    貢獻者: 淡江大學企業管理學系;淡江大學管理科學學系
    關鍵詞: data mining;frequent pattern;frequent itemset;FP-tree;transaction database
    日期: 2012-01
    上傳時間: 2013-10-14 16:21:06 (UTC+8)
    出版者: 臺北市:中央研究院資訊科學研究所
    摘要: Mining frequent patterns is to discover the groups of items appearing always together excess of a user specified threshold. Many approaches have been proposed for mining frequent patterns by applying the FP-tree structure to improve the efficiency of the FP-Growth algorithm which needs to recursively construct sub-trees. Although these approaches do not need to recursively construct many sub-trees, they also suffer the problem of a large search space, such that the performances for the previous approaches degrade when the database is massive or the threshold for mining frequent patterns is low. In order to reduce the search space and speed up the mining process, we propose an efficient algorithm for mining frequent patterns based on frequent pattern tree. Our algorithm generates a subtree for each frequent item and then generates candidates in batch from this sub-tree. For each candidate generation, our algorithm only generates a small set of candidates, which can significantly reduce the search space. The experimental results also show that our algorithm outperforms the previous approaches.
    關聯: Journal of Information Science and Engineering 28(1), pp.177-191
    顯示於類別:[管理科學學系暨研究所] 期刊論文
    [企業管理學系暨研究所] 期刊論文

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