Funding for this research was provided by:
Fundamental Research Funds for the Central Universities (2017B19714)
Fundamental Research Funds for Central Universities (2017B07414)
Natural Science Foundation of Jiangsu Province (BK20180500)
Natural Science Foundation of Jilin Engineering Normal University (XYB201814)
Article History
Received: 6 November 2018
Accepted: 21 March 2019
First Online: 27 March 2019
Competing interests
: The authors declare that they have no competing interests.