1. School of Information and Communication Engineering, Dalian University of Technology, Dalian, China
2. Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai, China
3. School of Software Engineering, Tongji University, Shanghai, China
4. School of Computer Science and Engineering, Nanyang Technological University, Jurong West, Singapore
5. Singapore Institute of Manufacturing Technology, A*STAR, Fusionopolis Way, Singapore