About the Authors
- Qing Guo
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Roles Writing – original draft
Affiliation School of Aeronautics, Northwestern Polytechnical University, Xi’an, Shaanxi, China
- Fangyi Wan
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Roles Writing – original draft
* E-mail: fwan@nwpu.edu.cn
Affiliation School of Aeronautics, Northwestern Polytechnical University, Xi’an, Shaanxi, China
Competing Interests
The authors have declared that no competing interests exist.