About the Authors

Xiangbin Zhu

Contributed equally to this work with: Xiangbin Zhu, Huiling Qiu

zhuxb@zjnu.cn

Affiliation College of Mathematics, Physics and Information Engineering, Zhejiang Normal University, Zhejiang, China

Huiling Qiu

Contributed equally to this work with: Xiangbin Zhu, Huiling Qiu

Affiliation College of Mathematics, Physics and Information Engineering, Zhejiang Normal University, Zhejiang, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceptualization: XZ. Data curation: HQ. Formal analysis: XZ HQ. Methodology: XZ HQ. Project administration: XZ. Resources: XZ. Software: HQ. Supervision: XZ. Visualization: HQ. Writing – original draft: HQ XZ.