Jia, L. Y.
Xu, J. L.
Zhao, R. B.
Pan, H.
Shen, J. L.
Yuan, L. Y.
Li, G. K.
Ma, L.
Zhen, C. M.
Hou, D. L.
Funding for this research was provided by:
the Hebei Natural Science Foundation (E2016205268)
the National Natural Science Foundation of China (11504247)
Colleges and universities in Hebei province science and technology research project (QN2015013)
the Department of science and technology of Hebei province scientific and technological research project (13211032, 15211036)
the Financial support science and technology plan projects of Zhangjiakou city (1611070A)
the Graduate student innovation fund project of Hebei province (sj2016022)