Tian, Heqiang
Wang, Chenchen
Dang, Xiaoqing
Sun, Lining
Funding for this research was provided by:
Shandong Province Young and Middle-Aged Scientists Research Awards Fund (BS2013ZZ011)
Qingdao Application Foundation Research Project (Youth special) (14-2-4-120-jch)
Scientific Research Foundation of Shandong University of Science and Technology for Recruited Talents ((2013RCJJ016))
National Natural Science Foundation of China (51305241)
handong province high school scientific research plan project (J12LA03)