Funding for this research was provided by:
National Natural Science Foundation of China (61773133)
Wilkens Endowment Fund of Missouri University of Science and Technology
Natural Science Foundation of Heilongjiang Province (F2016008)
Article History
Received: 19 November 2016
Revised: 18 January 2018
Accepted: 19 January 2018
First Online: 20 February 2018