Funding for this research was provided by:
National Natural Science Foundation of China (51402146)
the Natural Science Foundation of Jiangxi Province (20171BAB206046)
Foundation from the Educational Commission of Jiangxi Province (GJJ150711, GJJ170579)
Article History
Received: 22 April 2018
Accepted: 16 July 2018
First Online: 23 July 2018