About the Authors

Shaoli Liu

liushaoli@bit.edu.cn

Current address: School of Mechanical Engineering, Beijing Institute of Technology, Beijing, China

Affiliation School of Mechanical Engineering, Beijing Institute of Technology, Beijing, China

Zeyang Xia

Current address: Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, ShenZhen, China

Affiliation Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, ShenZhen, China

Jianhua Liu

Current address: School of Mechanical Engineering, Beijing Institute of Technology, Beijing, China

Affiliation School of Mechanical Engineering, Beijing Institute of Technology, Beijing, China

Jing Xu

Current address: Department of Mechanical Engineering, Tsinghua University, Beijing, China

Affiliation Department of Mechanical Engineering, Tsinghua University, Beijing, China

He Ren

Current address: Department of Ultrasound in Medicine, Navy General Hospital of PLA, Beijing, China

Affiliation Department of Ultrasound in Medicine, Navy General Hospital of PLA, Beijing, China

Tong Lu

Current address: Department of Ultrasound, the Chinese PLA General Hospital, Beijing, China

Affiliation Department of Ultrasound, the Chinese PLA General Hospital, Beijing, China

Xiangdong Yang

Current address: Department of Mechanical Engineering, Tsinghua University, Beijing, China

Affiliation Department of Mechanical Engineering, Tsinghua University, Beijing, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: SLL HR. Performed the experiments: ZYX JX TL HR SLL. Analyzed the data: SLL. Contributed reagents/materials/analysis tools: ZYX JX TL HR. Wrote the paper: SLL JHL.