About the Authors

Jun Feng Wang

Affiliations College of Mechatronics and Automation, National University of Defense Technology, Changsha, Hunan, P. R. China, State Key Laboratory of Transducer Technology, Chinese Academy of Science, Shanghai, P. R. China

Xue Zhong Wu

Affiliation College of Mechatronics and Automation, National University of Defense Technology, Changsha, Hunan, P. R. China

Rui Xiao

ruixiao203@sina.com (RX); ptdong@nudt.edu.cn (PTD)

Affiliation Beijing Institute of Radiation Medicine, Beijing, P. R. China

Pei Tao Dong

ruixiao203@sina.com (RX); ptdong@nudt.edu.cn (PTD)

Affiliations College of Mechatronics and Automation, National University of Defense Technology, Changsha, Hunan, P. R. China, State Key Laboratory of Transducer Technology, Chinese Academy of Science, Shanghai, P. R. China

Chao Guang Wang

Affiliation College of Mechatronics and Automation, National University of Defense Technology, Changsha, Hunan, P. R. China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JFW XZW. Performed the experiments: JFW. Analyzed the data: JFW. Contributed reagents/materials/analysis tools: PTD RX CGW. Wrote the paper: JFW.