Xia, Wei
Wang, Fangfang
Wang, Longxiang
Wang, Junguo
Mu, Xichuan
Chen, Kun
Funding for this research was provided by:
the Fundamental Research Funds for the Central Universities (15CX05013A)
National Natural Science Foundation of China (Grant 21406269)
Scientific Research Foundation for Returned Scholars, Ministry of Education of China (K1504051C)
Shandong Provincial Key Research Program (Grant: 2015GSF121017)
the International Cooperation and Exchange Fund, China University of Petroleum (UPCGJ2018010)
Shandong Provincial Natural Science Foundation, China (Grant ZR2014BQ012)
Article History
Received: 29 May 2018
Accepted: 22 July 2018
First Online: 30 July 2018