arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2004.08015cs.DB
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基于动态项目排序的可解释分类约束模式挖掘

Efficient Constrained Pattern Mining Using Dynamic Item Ordering for Explainable Classification

Hiroaki Iwashita, Takuya Takagi, Hirofumi Suzuki, Keisuke Goto, Kotaro Ohori, Hiroki Arimura

摘要:

可解释的分类模型的学习在过去几年中引起了广泛的关注。发现能够突出两个类之间差异的简洁和对比模式非常重要。这种模式对人类专家很有用,可以用来构建强大的分类器。在本文中,我们考虑挖掘最小的新兴模式,从高维数据集的各种约束下的监督设置。我们专注于一个扩展,其中模式可以包含负项,指定一个项目的情况下。在这种情况下,数据库变得高度密集,这使得挖掘更具挑战性,因为流行的模式挖掘技术,如fp-tree和发生交付不能有效地工作。为了解决这个问题,我们提出了一个有效的算法,挖掘最小的新兴模式相结合的两种技术:动态变量排序在模式搜索,以提高修剪效果,并使用基于指针的动态数据结构,称为跳舞链接,有效地维护发生列表。基准数据集上的实验表明,我们的算法实现了显着的速度比新兴的模式挖掘方法的基础上LCM,一个非常快速的深度优先频繁项集挖掘使用静态变量排序。

英文摘要:

Learning of interpretable classification models has been attracting much attention for the last few years. Discovery of succinct and contrasting patterns that can highlight the differences between the two classes is very important. Such patterns are useful for human experts, and can be used to construct powerful classifiers. In this paper, we consider mining of minimal emerging patterns from high-dimensional data sets under a variety of constraints in a supervised setting. We focus on an extension in which patterns can contain negative items that designate the absence of an item. In such a case, a database becomes highly dense, and it makes mining more challenging since popular pattern mining techniques such as fp-tree and occurrence deliver do not efficiently work. To cope with this difficulty, we present an efficient algorithm for mining minimal emerging patterns by combining two techniques: dynamic variable-ordering during pattern search for enhancing pruning effect, and the use of a pointer-based dynamic data structure, called dancing links, for efficiently maintaining occurrence lists. Experiments on benchmark data sets showed that our algorithm achieves significant speed-ups over emerging pattern mining approach based on LCM, a very fast depth-first frequent itemset miner using static variable-ordering.

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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