1. School of Computer Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China
2. Department of Radiology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325035, China
3. College of Computer Science and Technology, Changchun Normal University, Changchun 130032, China
4. College of Computer Science and Technology, Changchun University of Science Technology, Changchun 130032, China
5. College of Mathematics, Physics and Electronic Information Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China