1. Academy of Advanced Interdisciplinary Research, Xidian University, Xi'an, China
2. Department of Mathematics and Information Technology, The Education University of Hong Kong, Ting Kok, Hong Kong
3. School of Electronic Engineering, Xidian University, Xi'an, China
4. Key Laboratory of Intelligent Perception and Image Understanding of Ministry of Education, Xidian University, Xi'an, China
5. Department of Sport and Exercise Science, College of Education, Zhejiang University, Hangzhou, China
6. Faculty of Business, Chu Hai College of Higher Education, Tuen Mun, Hong Kong