1. School of Mathematics and Physics, Guangxi Minzu University, Nanning, China
2. School of Advanced Manufacturing, Sun Yat-sen University, Shenzhen, China
3. School of Mathematics, Southeast University, Nanjing, China
4. School of Mathematics and Physics, Center for Applied Mathematics of Guangx, Guangxi Key Laboratory of Hybrid Computation and IC Design Analysis, Guangxi Minzu University, Nanning, China