1. College of Engineering and the Key Laboratory of Intelligent Manufacturing Technology, Ministry of Education of China, Shantou University, Shantou, Guangdong, China
2. College of Engineering, Shantou University, Shantou, Guangdong, China
3. Center for Structural Acoustics and Machine Fault Diagnosis, Qingdao University of Technology, Qingdao, China
4. Nuclear Power Institute of China, Chengdu, China