Li, Jichen
Yang, Dezhao
Wang, Wei
Piao, Songlin
Zhou, Jianyu
Saiyin, Wuliji
Zheng, Changyu
Sun, Hongchen
Li, Yu
Funding for this research was provided by:
National Natural Science Foundation Committee of International Cooperation Bureau (30672338)
Returned Student Science Fund of Heilongjiang province (LC2009C04)
Article History
Received: 11 February 2015
Accepted: 25 August 2015
First Online: 11 September 2015