1. School of Mechanical and Electric Engineering, Soochow University, Suzhou, Jiangsu, China;
2. Guangdong Provincial Key Laboratory of Computer Integrated Manufacturing, Guangdong University of Technology, Guangzhou, China;
3. College of Safety Science and Engineering, Nanjing Tech University, Nanjing, Jiangsu, China;
4. Work Safety Supervision Troop of Suzhou Industrial Park, Suzhou, Jiangsu, China