arXivDaily arXiv每日学术速递 周一至周五更新
arXiv cs/0411035cs.DBcs.AI
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一种基于FP树的强相关对挖掘方法

A FP-Tree Based Approach for Mining All Strongly Correlated Pairs without Candidate Generation

Zengyou He, Xiaofei Xu, Shengchun Deng

摘要:

给定用户指定的最小相关阈值和事务数据库,挖掘所有强相关对的问题是找到Pearson相关系数大于阈值的所有项目对。尽管在Taper算法中使用了基于上界的剪枝技术[1],但当项目和事务的数量非常大时,候选对的生成和测试仍然是昂贵的。为了避免对大量候选项对进行代价高昂的测试,本文基于著名的FP-树数据结构,提出了一种高效的挖掘全强相关项对完备集的算法Tcp。我们在合成数据集和真实数据集上的实验结果表明,在相关阈值规格的实际范围内,Tcp的性能明显优于先前开发的Taper算法。

英文摘要:

Given a user-specified minimum correlation threshold and a transaction database, the problem of mining all-strong correlated pairs is to find all item pairs with Pearson's correlation coefficients above the threshold . Despite the use of upper bound based pruning technique in the Taper algorithm [1], when the number of items and transactions are very large, candidate pair generation and test is still costly. To avoid the costly test of a large number of candidate pairs, in this paper, we propose an efficient algorithm, called Tcp, based on the well-known FP-tree data structure, for mining the complete set of all-strong correlated item pairs. Our experimental results on both synthetic and real world datasets show that, Tcp's performance is significantly better than that of the previously developed Taper algorithm over practical ranges of correlation threshold specifications.

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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