About the Authors

Xiaojun Guo

guoxj159@163.com

Affiliations School of Science, Nantong University, Nantong, Jiangsu Province, China, College of Economics and Management, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu Province, China

Sifeng Liu

Affiliation College of Economics and Management, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu Province, China

Lifeng Wu

Affiliation College of Economics and Management, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu Province, China

Lingling Tang

Affiliation School of Electrical and Computer Engineering, Cornell University, Ithaca, New York, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: XG SL. Performed the experiments: XG LW. Analyzed the data: XG LW. Wrote the paper: XG SL LW LT.