Funding for this research was provided by:
National Natural Science Foundation of China (61672179, 61370083, 61402126)
Research Fund for the Doctoral Program of Higher Education of China (20122304110012)
Youth Science Foundation of Heilongjiang Province of China (QC2016083)
Heilongjiang postdoctoral Fund (LBH-Z14071)
China Scholarship Council
Article History
Received: 15 October 2016
Revised: 5 December 2017
Accepted: 11 December 2017
First Online: 16 January 2018