1. Ministry of Education, Key Laboratory of Nondestructive Testing Nanchang Hangkong University, Nanchang, China
2. College of Electrical Engineering, Nanjing Vocational University of Industry Technology, Nanjing, China
3. College of Electrical Engineering and Control Science, Nanjing Tech University, Nanjing, China
4. AECC Shenyang Liming Aero-Engine CO.LTD, Nanjing, China