Luo, Guoliang
Zhang, Xin
Liu, Shanshan
Dan, Erli
Guo, Yiwei
Funding for this research was provided by:
Beijing Social Science Fund Energy Base Project (17JDYJB011)
Beijing Social Science Fund (16YJC062)
Article History
Received: 29 May 2018
Accepted: 7 January 2019
First Online: 15 January 2019