About the Authors
- FengXun Qi
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Roles Writing – original draft
Affiliation School of Resource and Environment Engineering, Ludong University, Yantai, China
- WeiShan Qin
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Roles Writing – review & editing
* E-mail: qinws@ldu.edu.cn
Affiliation School of Resource and Environment Engineering, Ludong University, Yantai, China
- Xiaohan Li
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Roles Software
Affiliation School of Resource and Environment Engineering, Ludong University, Yantai, China
Competing Interests
The authors have declared that no competing interests exist.