Zhang, Zhen
Li, Ming
Chen, Feixue
Li, Lixiang
Liu, Jun
Li, Zhen
Ji, Rui
Zuo, Xiuli
Li, Yanqing
Funding for this research was provided by:
the National Natural Science Foundation of China (81330012)
the Shandong Province Science and Technology Committee (2013GSF11833)
the National Natural Science Foundation of China (81300284)