Guan, Yongliang
Zhao, Zengqin
Lin, Xiuli
Funding for this research was provided by:
the Doctoral Program Foundation of Education Ministry of China (20133705110003)
the Natural Science Foundation of Shandong Province of China (ZR2014AM007, ZR2015AL002)
Project of Shandong Province Higher Educational Science and Technology Program (J15LI16)