About the Authors

Xianchao Tang

riemannfly@163.com

Affiliation School of Computer Science and Technology, Tianjin University, Tianjin, China

Tao Xu

Affiliations School of Computer Science and Technology, Civil Aviation University of China, Tianjin, China, Information Technology Research Base of Civil Aviation Administration of China, Tianjin, China

Xia Feng

Affiliations School of Computer Science and Technology, Civil Aviation University of China, Tianjin, China, Information Technology Research Base of Civil Aviation Administration of China, Tianjin, China

Guoqing Yang

Affiliations School of Computer Science and Technology, Tianjin University, Tianjin, China, Information Technology Research Base of Civil Aviation Administration of China, Tianjin, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: XT TX XF GY. Performed the experiments: XT TX. Analyzed the data: XT TX XF GY. Contributed reagents/materials/analysis tools: XT TX. Contributed to the writing of the manuscript: XT TX XF GY. Designed the software used in analysis: TX XT.