Wang, Qianqian
Zhao, Tingting
Liu, Yanping
Xing, Shanshan
Li, Lei
Gao, Dawei
Funding for this research was provided by:
National Natural Science Foundation (21476190)
Hebei Province Key basic research fund (15961301D)
Hebei Province Science and technology support project (142777118D)
Qinhuangdao Science and technology research and development Project (201202B029)