1. School of Computer Science and Technology, Huazhong University of Science and Technology, China and Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, China
2. School of Computer Science and Technology, Huazhong University of Science and Technology, Wuhan, China
3. University of Calabria, Rende, Italy
4. University of Ljubljana, Faculty of Electrical Engineering, Slovenia