1. School of Mathematics and Physics, China University of Geosciences, Wuhan 430074, P. R. China
2. School of Mathematical Sciences, Liaocheng University, Liaocheng 252059, P. R. China
3. Guangxi Colleges and Universities Key Laboratory of Complex System Optimization and Big Data Processing, Yulin Normal University, Yulin, Guangxi 537000, P. R. China
4. College of Mechanical Engineering, Beijing University of Technology, Beijing 100124, P. R. China