1. Guizhou Key Laboratory of Economics System Simulation, Guizhou University of Finance and Economics, Guiyang 550004, China
2. School of Mathematics and Physics, University of South China, Hengyang 421001, China
3. School of Mathematics and Statistics, Henan University of Science and Technology, Luoyang 471023, China
4. Hunan Provincial Key Laboratory of Mathematical Modeling and Analysis in Engineering, Changsha University of Science and Technology, Changsha 410114, China
5. School of Mathematics and Statistics, Central South University, Changsha 410083, China