1. Department of Electrical Engineering Stanford University Stanford CA 94305 USA
2. Department of Electrical and Computer Engineering National University of Singapore Singapore 117583 Singapore
3. State Key Laboratory of Nonlinear Mechanics Institute of Mechanics Chinese Academy of Sciences Beijing 100190 China
4. Institute of Solid Mechanics Beihang University (BUAA) Beijing 100191 China
5. School of Engineering Science University of Chinese Academy of Sciences Beijing 100049 China
6. State Key Laboratory of Structural Analysis for Industrial Equipment Department of Engineering Mechanics Dalian University of Technology Dalian 116024 China
7. State Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and Technology Wuhan 430074 China