1. Ningxia Key Laboratory of Intelligent Sensing for Desert Information, School of Physics and Electronic-Electrical Engineering, Ningxia University, Yinchuan 750021, People's Republic of China
2. State Key Lab for Strength and Vibration of Mechanical Structures, School of Aerospace Science, Xi’an Jiaotong University, Xi’an 710049, People's Republic of China
3. Department of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY 14853, USA
4. Division of Engineering in Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA 02139, USA