1. The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi’an Jiaotong University, Shaanxi 710049, P. R. China
2. Bioinspired Engineering and Biomechanics Center (BEBC), Xi’an Jiaotong University, Shaanxi 710049, P. R. China
3. School of Civil Engineering and Architecture, Xi’an University of Technology, Shaanxi 710048, P. R. China