1. Guangzhou Institute of Technology, Xidian University, Xian, China
2. School of Computer Science and Cyber Engineering, Guangzhou University, Guangzhou, China
3. National Center for Applied Mathematics, Chongqing Normal University, Chongqing, China
4. Faculty of Engineering and Information Technology, University of Technology Sydney, Broadway, New South Wales, Australia
5. School of Computer Science and Technology, Harbin Institute of Technology, Shenzhen, China