Liu, Lixun
Meng, Lingpeng
Zhang, Xueying
Zeng, Yanli
Funding for this research was provided by:
National Natural Science Foundation of China (21371045, 21373075)
Natural Science Foundation of Hebei Province (B2015205045, B2014205109)
Education Department Foundation of Hebei Province (ZH2012106, ZD20131037)