Tang, Yinggan
Zhao, Liheng
Han, Zhenzhen
Bi, Xiangwei
Guan, Xinping
Funding for this research was provided by:
National Natural Science Foundation of China (61273260)
Natural Science Foundation of Hebei Province (F2014203208)
the Specialized Research Fund for the Doctoral Program of Higher Education of China (20121333120010)
China Postdoctoral Science Foundation (2013M530888,2014T70229)