1. School of Science, Nantong University, Nantong 226019, China
2. School of Mathematical Sciences, Suzhou University of Science and Technology, Suzhou 215009, China
3. School of Mathematics and Computational Science, Xiangtan University, Xiangtan 411105, China
4. Hunan Key Laboratory for Computation and Simulation in Science and Engineering, Xiangtan 411105, China
5. Key Laboratory of Intelligent Computing Information Processing of Ministry of Education, Xiangtan 411105, China