1. School of Intelligent Technology and Engineering, Chongqing University of Science & Technology, Chongqing, People's Republic of China
2. Key Laboratory of Machine Perception and Children's Intelligence Development, Chongqing University of Education, Chongqing, People's Republic of China
3. School of Electrical Engineering, Chongqing University of Science & Technology, Chongqing, People's Republic of China
4. College of Safety Engineering, Chongqing University of Science & Technology, Chongqing, People's Republic of China
5. College of Computer, Chongqing University of Technology, Chongqing, People's Republic of China