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TKEH: an efficient algorithm for mining top-k high utility itemsets

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Abstract

High utility itemsets mining is a subfield of data mining with wide applications. Although the existing high utility itemsets mining algorithms can discover all the itemsets satisfying a given minimum utility threshold, it is often difficult for users to set a proper minimum utility threshold. A smaller minimum utility threshold value may produce a huge number of itemsets, whereas a higher one may produce a few itemsets. Specification of minimum utility threshold is difficult and time-consuming. To address these issues, top-k high utility itemsets mining has been defined where k is the number of high utility itemsets to be found. In this paper, we present an efficient algorithm (named TKEH) for finding top-k high utility itemsets. TKEH utilizes transaction merging and dataset projection techniques to reduce the dataset scanning cost. These techniques reduce the dataset when larger items are explored. TKEH employs three minimum utility threshold raising strategies. We utilize two strategies to prune search space efficiently. To calculate the utility of items and upper-bounds in linear time, TKEH utilizes array-based utility technique. We carried out some extensive experiments on real datasets. The results show that TKEH outperforms the state-of-the-art algorithms. Moreover, TKEH always performs better for dense datasets.

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Authors and Affiliations

  1. Department of Computer Science and Engineering, Indian Institute of Technology (BHU), Varanasi, 221–005, India

    Kuldeep Singh, Shashank Sheshar Singh, Ajay Kumar & Bhaskar Biswas

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  1. Kuldeep Singh
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  2. Shashank Sheshar Singh
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  3. Ajay Kumar
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Correspondence to Kuldeep Singh.

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The article uses threshold raising and memory reduction techniques to mine the top-k high utility itemsets mining.

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The authors declare no conflicts of interest.

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Singh, K., Singh, S.S., Kumar, A. et al. TKEH: an efficient algorithm for mining top-k high utility itemsets. Appl Intell 49, 1078–1097 (2019). https://doi.org/10.1007/s10489-018-1316-x

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