1. MOE-LCSM, School of Mathematics and Statistics, Hunan Normal University, Changsha, P.R. China
2. School of Business, Hunan Normal University, Changsha, P.R. China
3. Hunan Province Cooperative Innovation Center for the Construction and Development of Dongting Lake Ecological Economic Zone, School of Mathematics and Physics, Hunan University of Arts and Science, Changde, P.R. China
4. Key Laboratory of Applied Statistics and Data Science, Hunan Normal University, College of Hunan Province, Changsha, P.R. China