Zhang, Dongmei
Cheng, Wenping
Ma, Jinghong
Li, Ruifeng
Funding for this research was provided by:
the National Natural Science Foundation of China (No. 51204120)
the China Postdoctoral Science Foundation (No. 2012M510782)
Natural Science Foundation of Shanxi (No. 2014021014-1)
Key Scientific and Technological Project of coal fund of Shanxi province (No.FT201402-03)