Funding for this research was provided by:
National Natural Science Foundation of China (11272229, 11302144)
Chinese Aviation Science Foundation (2016ZA48001)
Tianjin Research Program of Application Foundation and Advanced Technology (16JCYBJC18800)
Article History
Received: 10 May 2018
Accepted: 14 October 2018
First Online: 24 November 2018
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.