1. School of Computer and Software, Nanjing University of Information Science and Technology, Nanjing, China
2. Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (CICAEET), Nanjing University of Information Science and Technology, Nanjing, China
3. Nanjing Institute of Technology, Nanjing, China
4. Department of Computer Science, King Saud University, Riyadh, Saudi Arabia