Funding for this research was provided by:
National Natural Science Foundation of China (61501042)
the National High-Tech R&D Program (863) of China (2015AA016101)
the Beijing Nova Program (Z151100000315078)
the Information Network Open Source Platform and Technology Development Strategy (049900617)
ORCID
Cheng-cheng LI: http://orcid.org/0000-0003-3507-8935
Publication History
Received: 2016-09-27
Accepted: 2017-04-18
Crosschecked: 2017-11-06
Content Type
: Article
Copyright
: © Zhejiang University and Springer-Verlag GmbH Germany 2017