Wang, Yaning
Liu, Ximin
Funding for this research was provided by:
Research Foundation for the Doctoral Program of Henan Normal University (qd14145)
Youth Science Foundation of Henan Normal University (2014QK01)
National Nature Science Foundation of China (11526080)
Fundamental Research Funds for the Central Universities (DUT14ZD208)
National Natural Science Foundation of China (11371076, 11431009)