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Authors
Yang, Huijuan https://orcid.org/0000-0002-6962-3172
Liu, Weiwei
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Funding
Funding for this research was provided by:
Civil Aviation Flight University of China (Q2018-147)
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Article History
Received: 4 November 2018
Accepted: 7 May 2019
First Online: 15 May 2019
Competing interests
: The authors declare that they have no competing interests.
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