基金the National Natural Science Foundation of China under Grant Nos.60473014,60773009(国家自然科学基金)the National High-Tech Research and Development Plan of China under Grant No.2007AA01Z290(国家高技术研究发展计划(863))+1 种基金the China Scholarship Council under Grant No.2007101731(国家留学基金)the Natural Science Foundation of Hubei Province of China under Grant No.2007ABA009(湖北省自然科学基金)
