1. School of Computer Science and Engineering, South China University of Technology, Guangzhou, China
2. Guangzhou Institute of Technology, Xidian University, Guangzhou, China
3. Department of Industrial Systems Engineering and Management, College of Design and Engineering, National University of Singapore, Queenstown, Singapore
4. Department of Electrical and Electronic Engineering, Hanyang University, Ansan, South Korea
5. Zhejiang Normal University, Jinhua, China