About the Authors

Jianming Zhou

zhoujm@bit.edu.cn

Affiliation School of Information and Electronics, Beijing Institute of Technology, Beijing, 100081, China

Xiao Yang

Affiliation School of Information and Electronics, Beijing Institute of Technology, Beijing, 100081, China

Qiuyuan Lu

Affiliation School of Information and Electronics, Beijing Institute of Technology, Beijing, 100081, China

Fan Liu

Affiliation School of Information and Electronics, Beijing Institute of Technology, Beijing, 100081, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JZ XY FL. Performed the experiments: QL FL. Analyzed the data: JZ XY QL. Contributed reagents/materials/analysis tools: JZ. Wrote the paper: JZ XY.