Li, Runrun
Chen, Wen
Zhou, Jing
Sun, Huajun
Bao, Yiwang
Funding for this research was provided by:
National Natural Science Foundation of China (51072148)
Key Programme of Natural Science Foundation of China (50932004)
Program for New Century Excellent Talents in University (NCET-09-0628)
Key Project of Chinese Ministry of Education (109111)