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A Nature-Inspired Method to Mine Top-k Multi-Level High-Utility Itemsets

CYBERNETICS AND SYSTEMS(2023)

HUTECH Univ | Vietnam Natl Univ | Vietnam Natl Univ Ho Chi Minh City | Int Univ

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Abstract
High-Utility Itemset Mining (HUIM) is designed to discover sets of itemsets that can bring high profits from the database. However, HUIM encounters several challenges in picking a suitable minimum utility threshold for each database. A class of algorithms that select the top-k itemsets based on their utility has been proposed to address this issue. Although traditional top-k HUI mining algorithms do not require a specific threshold, they tend to be very time-consuming and memory-intensive when dealing with large datasets. To tackle the combinational complexity involved in HUIM algorithms, nature-inspired methods have been suggested and adopted. Nonetheless, these algorithms have traditionally focused on handling conventional, often overlooking critical data structures like product hierarchies. Consequently, they fail to extract crucial insight from this novel database format. Thus, our research introduces a heuristic-based algorithm designed to leverage top-k itemsets from databases enriched with item taxonomy data. We propose a technique involving the early pruning of unpromising items to enhance mining efficiency. Experimental evaluations are conducted on several datasets to assess the method's performance, both with and without adopting this strategy, demonstrating its effectiveness.
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Key words
Cross-entropy,data mining,high-utility itemset mining,multi-level abstract database,top-k multi-level high-utility itemset
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要点】:提出了一种基于启发式的自然灵感算法,用以从富含项目分类数据的数据库中挖掘 Top-k 多层次高效用项集,解决了传统算法在处理大型数据集时的高时间消耗和内存需求问题。

方法】:研究采用了一种早期剪枝的策略来提高挖掘效率,通过利用项目分类数据,该方法无需设置具体的最小效用阈值。

实验】:在多个数据集上进行了实验评估,实验结果证明了该方法在采用和未采用该策略的情况下均能有效地提升性能。具体数据集名称未在摘要中提及。