1. School of Mathematics and Statistics, Shaanxi Normal University, Xi’an, Shaanxi, China
2. School of Mathematics and Statistics, Minnan Normal University, Zhangzhou, Fujian, China
3. Key Laboratory of Granular Computing and Application in Fujian, Minnan Normal University, Zhangzhou, Fujian, China
4. School of Computer Science, Minnan Normal University, Zhangzhou, Fujian, China
5. Key Laboratory of Data Science and Intelligence Application in Fujian Province Universities, Minnan Normal University, Zhangzhou, Fujian, China