1. Key Laboratory of Optoelectronic Technology and System of the Education Ministry of China, Chongqing University, Chongqing 400044, China
2. Engineering Research Center of Industrial Computed Tomography Nondestructive Testing of the Education Ministry of China, Chongqing University, Chongqing 400044, China
3. College of Mathematics and Statistics, Chongqing University, Chongqing 401331, China
4. College of Mathematical Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China