论文标题

迈向目标高级项目集

Towards Target High-Utility Itemsets

论文作者

Miao, Jinbao, Gan, Wensheng, Wan, Shicheng, Wu, Yongdong, Fournier-Viger, Philippe

论文摘要

对于应用智能,公用事业驱动的模式发现算法可以识别数据库中有见地和有用的模式。但是,在这些用于模式发现的技术中,模式的数量可能很大,并且用户通常只对其中一些模式感兴趣。因此,有针对性的高实数项目集挖掘已成为一个关键的研究主题,其目的是找到符合目标模式约束的模式的子集,而不是所有模式。这是一项具有挑战性的任务,因为在非常大的搜索空间中有效找到量身定制的模式需要有针对性的采矿算法。已经提出了一种称为Targetum的第一种算法,该算法采用了类似于使用树结构进行后处理的方法,但是在许多情况下,运行时间和内存消耗都不令人满意。在本文中,我们通过提出一种带有模式匹配机制的新型基于列表的算法(名为Thuim(靶向的高实用项目集挖掘))来解决此问题,该机制可以在挖掘过程中迅速匹配高实用项,以选择目标模式。在不同的数据集上进行了广泛的实验,以将所提出算法的性能与最新算法进行比较。结果表明,THUIM在运行时和内存消耗方面表现良好,并且与Targetum相比具有良好的可扩展性。

For applied intelligence, utility-driven pattern discovery algorithms can identify insightful and useful patterns in databases. However, in these techniques for pattern discovery, the number of patterns can be huge, and the user is often only interested in a few of those patterns. Hence, targeted high-utility itemset mining has emerged as a key research topic, where the aim is to find a subset of patterns that meet a targeted pattern constraint instead of all patterns. This is a challenging task because efficiently finding tailored patterns in a very large search space requires a targeted mining algorithm. A first algorithm called TargetUM has been proposed, which adopts an approach similar to post-processing using a tree structure, but the running time and memory consumption are unsatisfactory in many situations. In this paper, we address this issue by proposing a novel list-based algorithm with pattern matching mechanism, named THUIM (Targeted High-Utility Itemset Mining), which can quickly match high-utility itemsets during the mining process to select the targeted patterns. Extensive experiments were conducted on different datasets to compare the performance of the proposed algorithm with state-of-the-art algorithms. Results show that THUIM performs very well in terms of runtime and memory consumption, and has good scalability compared to TargetUM.

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