Funding for this research was provided by:
Joint Fund of Civil Aviation Research (Grant No.U 1633203)
Civil Aviation Administration of China (MHRD20160103)
Article History
Received: 19 October 2018
Accepted: 25 February 2019
First Online: 1 March 2019
Compliance with ethical standards
:
: No conflict of interest exits in the submission of this manuscript, and manuscript is approved by all the authors for publication. I would like to declare on behalf of my co-authors that the work described was original research that has not been published previously, and not under consideration for publication elsewhere, in whole or in part. All the authors listed have approved the manuscript that is enclosed.