http://orcid.org/0000-0003-1203-9984
About the Authors
- Chen Shen
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Roles Conceptualization, Data curation, Formal analysis, Methodology, Writing – original draft
Affiliation School of Statistics and Mathematics, Yunnan University of Finance and Economics, Kunming, Yunnan, PR China
- Chen Chu
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Roles Conceptualization, Formal analysis, Investigation, Methodology
Affiliation School of Statistics and Mathematics, Yunnan University of Finance and Economics, Kunming, Yunnan, PR China
- Yini Geng
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Roles Data curation, Investigation
Affiliation School of Statistics and Mathematics, Yunnan University of Finance and Economics, Kunming, Yunnan, PR China
- Jiahua Jin
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Roles Conceptualization, Data curation, Investigation, Validation
Affiliations School of Statistics and Mathematics, Yunnan University of Finance and Economics, Kunming, Yunnan, PR China, Library, Yunnan Normal University, Kunming, Yunnan, PR China
- Fei Chen
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Roles Conceptualization, Investigation
Affiliation School of Statistics and Mathematics, Yunnan University of Finance and Economics, Kunming, Yunnan, PR China
- Lei Shi
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Roles Conceptualization, Formal analysis, Methodology
* E-mail: shi_lei65@hotmail.com
Affiliation School of Statistics and Mathematics, Yunnan University of Finance and Economics, Kunming, Yunnan, PR China
Competing Interests
The authors have declared that no competing interests exist.