Funding for this research was provided by:
Natural Science Foundation of Henan Province (162300410255)
National Natural Science Foundation of China (51778587, 51808510)
Foundation for University Young Key Teacher by Henan Province (2017GGJS005)
Outstanding Young Talent Research Fund of Zhengzhou University (1421322059)
Science and technology planning project of Transportation in Henan Province (2016Y2-2, 2018J3)
Article History
Received: 18 September 2018
Accepted: 28 May 2019
First Online: 6 June 2019