Funding for this research was provided by:
National Natural Science Foundation of China (61421061)
the Huawei Innovation Research Program
ORCID
Jian-qiao CHEN: http://orcid.org/0000-0003-3491-9237
Publication History
Received: 2017-01-13
Accepted: 2017-04-23
Crosschecked: 2017-12-20
Content Type
: Article
Copyright
: © Zhejiang University and Springer-Verlag GmbH Germany 2017