Bao, Xiu-Qi
Wang, Xiao-Liang
Zhang, Dan
Funding for this research was provided by:
National Science Foundation of China (81000568)
the Chinese National Basic Research Program (2011CB504105)
Beijing NOVA Program (2011109)
Beijing City Talents (2012D0009008000005)
Program for New Century Excellent Talents in University (3332013128)