About the Authors
- Zhenhui He
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Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Resources, Software, Validation, Visualization, Writing – original draft, Writing – review & editing
Affiliation School of Mathematics, Renmin University of China, Beijing China
- Kangning Dong
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Roles Conceptualization, Funding acquisition, Methodology, Project administration, Resources, Supervision, Writing – review & editing
* E-mail: dongkangning@ruc.edu.cn
Affiliation School of Mathematics, Renmin University of China, Beijing China
Competing Interests
The authors have declared that no competing interests exist.