Funding for this research was provided by:
973 Program (2013CB329404)
NSFC (61370147, 61402082)
NSFC (11401081)
Sichuan Province and the Fundamental Research Funds for the Central Universities (ZYGX2013Z005, ZYGX2013J106)
European Research Council (Advanced Grant 291405)
NSF Office of the Director (ECCS-1462398)
ONR (N000141410683)
Article History
Received: 12 July 2016
Revised: 10 May 2017
Accepted: 17 May 2017
First Online: 30 May 2017