1.Natural Science Foundation of China30970818,30770615,81271552,91071201;2.Key Program of Shanghai Science and Technology Committee11JC1412000,07JC14054;3.Guide Program of Shanghai Science and Technology Committee124119a5000;国家自然科学基金30970818,30770615,81271552,91071201;上海市科委重点项目11JC1412000,07JC14054;上海市科委引导类项目124119a5000