1. School of Transportation and Civil Engineering, Nantong University, Nantong, China
2. School of Computer Science and Technology, Harbin Institute of Technology, Harbin, China
3. Faculty of Information Technology, the Engineering Research Center of Intelligent Perception and Autonomous Control of Ministry of Education, the Beijing Laboratory of Smart Environmental Protection, the Beijing Key Laboratory of Computational Intelligence and Intelligent System, Beijing Artificial Intelligence Institute, Beijing University of Technology, Beijing, China
4. School of Computer Science and Informatics, Cardiff University, Cardiff, U.K.
5. Institute of Image Communication and Information Processing, Shanghai Jiao Tong University, Shanghai, China