1. School of Mathematics and Statistics, Minnan Normal University, Zhangzhou, Fujian, People's Republic of China
2. Key Laboratory of Complex System Optimization and Big Data Processing in Department of Guangxi Education, Yulin Normal University, Yulin, Guangxi, People's Republic of China
3. Key Laboratory of Granular Computing and Application in Fujian, Minnan Normal University, Zhangzhou, Fujian, People's Republic of China