1. School of Big Data and Information Industry, Chongqing City Management College, Chongqing, China;
2. School of Intelligent Technology and Engineering, Chongqing University of Science and Technology, Chongqing, China;
3. School of Electrical and Information Engineering, Chongqing University of Science and Technology, Chongqing, China;
4. School of Manufacturing Science and Engineering, Sichuan University, Chengdu, China