Zhou, Ruiqi
Liu, Hong
Hou, Guangying
Ju, Lei
Liu, Chunguang
Funding for this research was provided by:
National Natural Science Foundation of China (21507071)
The Fundamental Research Funds of Shandong University (2014BT013 and 2015JC030)
China Post-doctoral Science Foundation funded project (2014M560555 and 2015T80720)