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arXiv cs/0206004cs.DBcs.AI
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挖掘所有不可导频繁项集

Mining All Non-Derivable Frequent Itemsets

Toon Calders, Bart Goethals

摘要:

最近的频繁项集挖掘算法的研究导致显着的性能改善。然而,如果最小支持度阈值设置得太低,或者数据高度相关,则频繁项集本身的数量可能会非常大。为了克服这个问题,最近已经提出了一些建议,以构建一个简洁的表示的频繁项集,而不是挖掘所有的频繁项集。本文的主要目标是确定所有频繁项集的集合中的冗余,并利用这些冗余,以减少挖掘操作的结果。我们提出了推导规则,以获得紧边界上的候选项集的支持。我们展示了如何演绎规则允许构造一个最小的表示所有频繁项集。我们还提出了我们的建议和最近的建议之间的联系,简洁的表示,我们给出了在现实生活中的数据集,显示的演绎规则的有效性的实验结果。事实上,实验甚至表明,在许多情况下,首先挖掘的简洁表示,然后从这个表示创建频繁项集优于现有的频繁集挖掘算法。

英文摘要:

Recent studies on frequent itemset mining algorithms resulted in significant performance improvements. However, if the minimal support threshold is set too low, or the data is highly correlated, the number of frequent itemsets itself can be prohibitively large. To overcome this problem, recently several proposals have been made to construct a concise representation of the frequent itemsets, instead of mining all frequent itemsets. The main goal of this paper is to identify redundancies in the set of all frequent itemsets and to exploit these redundancies in order to reduce the result of a mining operation. We present deduction rules to derive tight bounds on the support of candidate itemsets. We show how the deduction rules allow for constructing a minimal representation for all frequent itemsets. We also present connections between our proposal and recent proposals for concise representations and we give the results of experiments on real-life datasets that show the effectiveness of the deduction rules. In fact, the experiments even show that in many cases, first mining the concise representation, and then creating the frequent itemsets from this representation outperforms existing frequent set mining algorithms.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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