基金This study was supported bythe National Natural Sciences Foundation of China(NSFC-30670239 ,30470213 ,30499341)the National Science FundforFostering Talents in Basic Research(NSFC-J0630964)+1 种基金the Knowledge Innovation Programof Chinese Academy of Sciences(KSCX2-YW-Z-008 ,KSCX3-IOZ-0614)partly also by the Beijing Natural Science Foundation(6052017)