Funding for this research was provided by:
The National Natural Science Foundation of China (61373051, 61502343, 61175023)
Science and Technology Development Program of Jilin Province (20140204004GX)
The Science Research Funds for the Guangxi Universities (KY2015ZD122)
the Science Research Funds for the Wuzhou University (2014A002)
Article History
Received: 23 May 2016
Revised: 25 August 2016
Accepted: 6 September 2016
First Online: 17 September 2016