A new parameter reduction algorithm for soft sets based on chi-square test

• Published in: Applied intelligence (Dordrecht, Netherlands) Vol. 51; no. 11; pp. 7960 - 7972
• Main Authors: Qin, Hongwu, Fei, Qinghua, Ma, Xiuqin, Chen, Wanghu
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.11.2021; Springer Nature B.V
• Subjects: Algorithms; Artificial Intelligence; Chi-square test; Computer Science; Data integration; Datasets; Decision making; Fuzzy sets; Linear programming; Machines; Manufacturing; Mathematical models; Mechanical Engineering; Methods; Nursing; Parameters; Processes; Reduction; Redundancy; Set theory; Statistical tests; Success; Soft set; Parameter reduction; Chi-square test; Redundancy
• ISSN: 0924-669X; 1573-7497
• DOI: 10.1007/s10489-021-02265-x

Redundancy is an extremely significant challenge in data integration and decision making based on the model of soft set which is able to process data under uncertainty. There are four available methods which are designed to reduce the redundant parameters of the soft set. But there is a very low success rate on a large number of data sets obtained from practices by these methods. In order to overcome the inherent weakness, we propose a parameter reduction method based on chi square distribution for the model of soft set. Experimental results on two real-life application cases and thirty randomly generated data sets demonstrate that our algorithm largely improves the success rate of parameter reduction, redundant degree of parameter, and has higher practicability in comparison with the four existing normal parameter reduction algorithms.