About the Authors

Yajun Zhang

zyj1985email@163.com

Affiliation Shanghai University, School of Computer Engineering and Science, Shanghai, China

Zongtian Liu

Affiliation Shanghai University, School of Computer Engineering and Science, Shanghai, China

Wen Zhou

Affiliation Shanghai University, School of Computer Engineering and Science, Shanghai, China

National Natural Science Foundation of China (NSFC)

Membership of the NSFC is provided in the Acknowledgments.

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: YZ ZL. Performed the experiments: YZ. Analyzed the data: YZ. Contributed reagents/materials/analysis tools: ZL WZ. Wrote the paper: YZ WZ.