Funding for this research was provided by:
National Natural Science Foundation of China (11572121)
Independent Research Projects of State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body in Hunan University (71375004)
China Scholarship Council (201606130100)
Article History
Received: 8 February 2018
Accepted: 10 September 2018
First Online: 28 September 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.