Gao, Yang http://orcid.org/0000-0003-1952-3955
Funding for this research was provided by:
Natural Science Foundation of Heilongjiang Province (QC2009C99)
Science and Technology Planning Project of Daqing City (zd-2017-49)
Article History
Received: 2 November 2017
Accepted: 21 March 2018
First Online: 3 April 2018
Competing interests
: The author declares that they have no competing interests.