1. Anhui Province Key Laboratory of Affective Computing & Advanced Intelligent Machine, School of Computer and Information, Hefei University of Technology, Hefei, China
2. School of Computer & Information, Hefei University of Technology, Hefei, China
3. Department of Electrical and Computer Engineering, University of Alberta, Edmonton, AB, Canada
4. School of Computer Science & Engineering, University of Electronic Science and Technology of China, Chengdu, China