Lu, Xin
Yu, Chang
Jin, Xuesong
Funding for this research was provided by:
National Natural Science Foundation of China (61401123)
Fundamental Research Funds for the Central Universities (HIT.NSRIF.201617)
Harbin Science and Technology Bureau (2014RFQXJ166)
Article History
Received: 13 January 2018
Accepted: 30 May 2018
First Online: 18 June 2018
Competing interests
: The authors declare that they have no competing interests.
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