You, Daofeng
Ren, Yanli
Huo, Shuying
Dong, Jingran
Ren, Shuguang
Shi, Tiesheng
Funding for this research was provided by:
Natural Science Foundation of Hebei Province (B2015201073)
You Bo Program of Hebei University (YB201403)
Natural Science Foundation of Hebei University (2014-11)