About the Authors

Hui Xu

Affiliations Institute of Robotics and Automatic Information System, Nankai University, Tianjin, China, Tianjin Key Laboratory of Intelligent Robotics, Nankai University, Tianjin, China

Mingzhu Sun

Affiliations Institute of Robotics and Automatic Information System, Nankai University, Tianjin, China, Tianjin Key Laboratory of Intelligent Robotics, Nankai University, Tianjin, China

Xin Zhao

zhaoxin@nankai.edu.cn

Affiliations Institute of Robotics and Automatic Information System, Nankai University, Tianjin, China, Tianjin Key Laboratory of Intelligent Robotics, Nankai University, Tianjin, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceptualization: HX MS XZ. Data curation: HX XZ. Formal analysis: HX XZ. Investigation: HX XZ. Methodology: HX XZ. Writing – original draft: HX XZ. Writing – review & editing: HX XZ.