Funding for this research was provided by:
National Science Foundation (CMMI-1362303, CMMI-1434419)
National Natural Science Foundation of China (71571048, 71071040)
Air Force Office of Scientific Research (FA9550-15-10050)
Article History
Received: 15 September 2016
Accepted: 31 March 2017
First Online: 17 May 2017