基金项目: | 国家自然科学基金资助项目(50575208);浙江省自然科学基金资助项目(M503099);浙江省科技计划重点资助项目(2006C21041)National Natural Science Foundation of China(No.50575208);Zhejiang Provincial Natural Science Foundation of China(No. M503099);Henan Provincial Science and Technology Key Program ( No. 2006C21041) |