About the Authors

Tian Qiu

tianqiu.edu@gmail.com

Affiliation School of Information Engineering, Nanchang Hangkong University, Nanchang, P. R. China

Zi-Ke Zhang

Affiliations Institute of Information Economy, Hangzhou Normal University, Hangzhou, P. R. China, Web Sciences Center, University of Electronic Science and Technology of China, Chengdu, P.R. China, Beijing Computational Science Research Center, Beijing, P. R. China

Guang Chen

Affiliation School of Information Engineering, Nanchang Hangkong University, Nanchang, P. R. China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: TQ ZKZ GC. Performed the experiments: TQ GC. Analyzed the data: TQ ZKZ. Wrote the paper: TQ ZKZ.