Funding for this research was provided by:
The Graduate Innovation fund of Jiangxi Province (YC2017-S094, YC2017-B016)
National Natural Science Foundation of China (81760121)
The Graduate Teaching Library Construction Project of Nanchang University (9202-0210210802)
Article History
Received: 25 May 2018
Revised: 8 July 2018
Accepted: 10 July 2018
First Online: 14 July 2018
Compliance with ethical standards
:
: All authors read and approved the final manuscript. The authors declare no conflict of interest. The founding sponsors had no role in the writing of the manuscript and in the decision to publish the results.