1. Shaanxi Engineering Research Center of NDT and Structural Integrity Evaluation, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, China
2. Department of Applied Physics, School of Science, Xi’an Polytechnic University, Xi’an 710048, Shaanxi, China
3. Xinjiang Uygur Autonomous Region Inspection Institute of Special Equipment, Urumqi 830011, Xinjiang, China