1. School of Intelligent Technology and Engineering, Chongqing University of Science and Technology, Chongqing, China
2. College of Optoelectronic Engineering, Chongqing University, Chongqing, China
3. College of Resource and Safety Engineering and the State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, China
4. Department of Computer and Electrical Engineering and Computer Science, Florida Atlantic University, Boca Raton, FL, USA