Variable population‐sized particle swarm optimization for highly imbalanced dataset classification. (4th February 2021)

• Record Type: Journal Article
• Authors: Rangasamy, Devi Priya; Rajappan, Sivaraj; Natarajan, Anitha; Ramasamy, Rajadevi; Vijayakumar, Devisurya
• Other Names: Li Ying guestEditor.; Shyamasundar R.K. guestEditor.; Wang Xinheng guestEditor.
• Is Part Of: Computational intelligence. Volume 37:Number 2(2021)
• Page Start: 873
• Page End: 890
• Publication Date: 2021-02-04
• Subjects: highly imbalanced dataset -- multiclass labels -- particle swarm optimization -- variable population; Artificial intelligence -- Periodicals; Computational linguistics -- Periodicals; 006.3
• DOI: 10.1111/coin.12436
• Languages: English
• ISSNs: 0824-7935

Abstract

Abstract: Real‐world datasets used for classification often face many challenges when they are imbalanced in nature which is unavoidable and need to be handled by analysts. Many researchers have proposed methods for handling imbalanced datasets and they mostly concentrated on handling binary classification with only two class labels. Only very few research works have been carried out for treating highly imbalanced datasets and fail to handle multiclass datasets. To address imbalance problem in multiclass datasets, this paper proposes a Variable Population sized Particle Swarm Optimization (VPPSO) which is a modified version of Particle Swarm Optimization (PSO) which works based on clustering. PSO usually has fixed population size and has high computational complexity. In order to reduce this, the population size is varied over generations and the particles are loaded into the population iteratively by retaining the balance nature of solutions. PSO optimizes the selection of training and testing samples from each class label in imbalanced datasets for improved classification results. From the implementation results, it is evident that using VPPSO, highly imbalanced datasets with multiclass attributes are classified more efficiently than state‐of‐the‐art algorithms. The statistical results also prove the superior performance of VPPSO.