1. School of Mathematics and Physics, Lanzhou Jiaotong University, Lanzhou, Gansu 730070, China
2. Institute of Decision and Game Theory, Lanzhou Jiaotong University, Lanzhou, Gansu 730070, China
3. School of Mathematics and Statistics, Hexi University, Zhangye, Gansu 734000, China
4. Institute for Complex Systems and Mathematical Biology King’s College, University of Aberdeen, Aberdeen AB24 3UE, United Kingdom