1. School of Physical Science and Technology, Lanzhou University, Lanzhou, Gansu 730000, China.
2. School of Stomatology, Lanzhou University, Lanzhou, Gansu 730000, China.
3. State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, Department of Engineering Mechanics, Dalian University of Technology, Dalian, Liaoning 116023, China.
4. Department of Engineering Mechanics, Dalian University of Technology, Dalian 116024, China.
5. School of Physics and Electronic Information Engineering, Qinghai Normal University, Xining, Qinghai 810008, China.
6. Department of Engineering Science and Mechanics, Pennsylvania State University, University Park, PA 16802, USA.
7. Department of Biomedical Engineering, Department of Materials Science and Engineering, Materials Research Institute, Pennsylvania State University, University Park, PA 16802, USA.