1. School of Computer Science and Engineering, Faculty of Innovation Engineering, Macau University of Science and Technology, Taipa, Macau
2. Department of Computer Science and Engineering, Hong Kong University of Science and Technology, Kowloon, Hong Kong
3. Department of Electronic and Information Engineering, Hong Kong Polytechnic University, Kowloon, Hong Kong
4. School of Computer Science and Technology, Huazhong University of Science and Technology, Wuhan, China