1. School of Computer Science and Engineering, University of Electronic Science and Technology of China, Sichuan, China
2. George Washington University, Washington, DC, USA
3. College of Science and Engineering, Hamad Bin Khalifa University, Doha, Qatar
4. Australian AI Institute, Faculty of Engineering and Information Technology, University of Technology Sydney, Ultimo, Australia
5. Department of Computer Science, Innovation Centre A1-D, University of Exeter, Exeter, U.K.
6. Texas A & M University, Doha, Qatar