1. College of Mathematics and Information Science, Guiyang University, Guiyang, People's Republic of China
2. School of Economics, Hangzhou Dianzi University, Hangzhou, People's Republic of China
3. School of Mathematics and Statistics, Guizhou University of Finance and Economics, Guiyang, People's Republic of China
4. College of Statistics and Data Science, Faculty of Science, Beijing University of Technology, Beijing, People's Republic of China