Funding for this research was provided by:
National Natural Science Foundation of China (11272229)
National Natural Science Foundation of China (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.