1. School of Computer Science, Minnan Normal University, Zhangzhou, People's Republic of China
2. Fujian Provincial University Key Laboratory of Data Science and Intelligent Application (Minnan Normal University), Zhangzhou, People's Republic of China
3. School of Mathematics Sciences and Statistics, Minnan Normal University, Zhangzhou, People's Republic of China
4. Fujian Provincial Key Laboratory of Granular Computing and Its Application (Minnan Normal University), Zhangzhou, People's Republic of China