Lu, Lu
Cao, Jinbao
Li, Guoqiang
Funding for this research was provided by:
National Science Foundation (1647650)
NSF | ENG | Division of Civil, Mechanical and Manufacturing Innovation (1333997)
National Aeronautics and Space Administration (NNX16AQ93A)
NSF | Directorate for Education and Human Resources (1736136)
Article History
Received: 10 April 2018
Accepted: 7 September 2018
First Online: 24 September 2018
Competing Interests
: The authors declare no competing interests.