Zhang, Hui
Sun, Xiumei
Wang, Wenwen
Funding for this research was provided by:
National Social Science Foundation of China (14BGL159)
Shandong Province Natural Science Key Fund Project (ZR2015GZ003)
Shandong Province Social Science Planning Project (13CDYJ27)
Fundamental Research Funds for the Central Universities (2015XKMS069)
the Natural Science Foundation of Jiangsu Province (BK20160246)