About the Authors

Xingli Guo

Affiliations School of Computer Science and Technology, Xidian University, Xi'an City, Shaanxi Province, People's Republic of China, School of Software Engineering, Xidian University, Xi'an City, Shaanxi Province, People's Republic of China

Lin Gao

lgao@mail.xidian.edu.cn

Affiliation School of Computer Science and Technology, Xidian University, Xi'an City, Shaanxi Province, People's Republic of China

Chunshui Wei

Affiliation School of Computer Science and Technology, Xidian University, Xi'an City, Shaanxi Province, People's Republic of China

Xiaofei Yang

Affiliation School of Software Engineering, Xidian University, Xi'an City, Shaanxi Province, People's Republic of China

Yi Zhao

Affiliation Institute of Computing Technology, Chinese Academy of Sciences, Beijing, People's Republic of China

Anguo Dong

Affiliation School of Science, Chang'an University, Xi'an City, Shaanxi Province, People's Republic of China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: XLG LG. Performed the experiments: XLG XFY CSW. Analyzed the data: XLG. Contributed reagents/materials/analysis tools: XLG LG AGD YZ. Wrote the paper: XLG.