1. School of Computer Science and Engineering, South China University of Technology, Guangzhou, China
2. School of Communication Engineering, Hangzhou Dianzi University, Hangzhou, China
3. School of Electrical Engineering, Shenyang University of Technology, Shenyang, Liaoning, China
4. School of Computing, University of Portsmouth, Portsmouth, U.K.
5. IEEE Systems, Man, and Cybernetics Society, Hong Kong, China