Liu, Xin
Li, Shundong
Liu, Jian
Chen, Xiubo
Xu, Gang
Funding for this research was provided by:
National Natural Science Foundation of China (61272435, 61272514)
Fundamental Research Funds for the Central Universities (GK201504017)
Fundamental Research Funds of Science and Technology of Baotou (2014S2004-2-1-15)