1. Hunan Key Laboratory for Computation and Simulation in Science and Engineering, School of Mathematics and Computational Science, Xiangtan University, Xiangtan, Hunan, People's Republic of China
2. School of Mathematics and Quantitative Economics, Shandong University of Finance and Economics, Jinan, Shandong, People's Republic of China
3. School of Mathematical Sciences, South China Normal University, Guangzhou, People's Republic of China