Han, Li-an
Ma, Zi-wei
Zhu, Hua-ze
Chen, Chang-le
Zhang, Tao
Funding for this research was provided by:
National Natural Science Foundation of China (61201088)
the Scientific Research Program Funded by ShaanXi Provincial Education Commission (Program No. 2010JK674)
PhD Starting Foundation of Yuncheng University (YQ-2013018)