Funding for this research was provided by:
National Natural Science Foundation of China (61806073)
National Natural Science Foundation of China (U1904119)
National Natural Science Foundation of China (31700858)
Science and Technology Department of Henan Province (192102210097)
Science and Technology Department of Henan Province (192102210126)
Science and Technology Department of Henan Province (192102210269)
Science and Technology Department of Henan Province (182102210210)
Science and Technology Department of Henan Province (172102210171)
Open Project Foundation of Information Technology Research Base of Civil Aviation Administration of China (CAAC-ITRB-201607)
Key Scientific Research Project of Colleges and Universities in Henan Province (18A520050)
Article History
Received: 13 February 2020
Accepted: 21 October 2020
First Online: 23 November 2020
Competing interests
: The authors declare that they have no competing interests.