An improved pheromone-based kohonen self-organising map in clustering and visualising balanced and imbalanced datasets

Azlin, Ahmad and Rubiyah, Yusof and Nor Saradatul Akmar, Zulkifli and Mohd Najib, Ismail (2021) An improved pheromone-based kohonen self-organising map in clustering and visualising balanced and imbalanced datasets. Journal of Information and Communication Technology, 20 (4). 651 -676. ISSN 1675-414X (Print); 2180-3862 (Online). (Published)

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The data distribution issue remains an unsolved clustering problem in data mining, especially in dealing with imbalanced datasets. The Kohonen Self-Organising Map (KSOM) is one of the well-known clustering algorithms that can solve various problems without a pre-defined number of clusters. However, similar to other clustering algorithms, this algorithm requires sufficient data for its unsupervised learning process. The inadequate amount of class label data in a dataset significantly affects the clustering learning process, leading to inefficient and unreliable results. Numerous research have been conducted by hybridising and optimising the KSOM algorithm with various optimisation techniques. Unfortunately, the problems are still unsolved, especially separation boundary and overlapping clusters. Therefore, this research proposed an improved pheromone- based PKSOM algorithm known as iPKSOM to solve the mentioned problem. Six different datasets, i.e. Iris, Seed, Glass, Titanic, WDBC, and Tropical Wood datasets were chosen to investigate the effectiveness of the iPKSOM algorithm. All datasets were observed and compared with the original KSOM results. This modification significantly impacted the clustering process by improving and refining the scatteredness of clustering data and reducing overlapping clusters. Therefore, this proposed algorithm can be implemented in clustering other complex datasets, such as high dimensional and streaming data.

Item Type: Article
Additional Information: Indexed by Scopus
Uncontrolled Keywords: Clustering; Imbalanced data; Kohonen self-organising map; Optimisation; Pheromone
Subjects: Q Science > QA Mathematics > QA76 Computer software
Faculty/Division: Faculty of Computer System And Software Engineering
Depositing User: Mrs Norsaini Abdul Samat
Date Deposited: 06 Jan 2022 04:23
Last Modified: 06 Jan 2022 04:23
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