重庆市教育委员会科学技术研究项目(the Scientific Research Project of Chongqing Municipal Education Commission under Grant No.KJ071203);重庆文理学院重点科研基金项目(the Key Research Project of Chongqing University of Arts & Sciences under Grant No.Z2006SJ30)
湖北省自然科学基金(the Natural Science Foundation of Hubei Province of China under Grant No.2004ABA023);湖北省教育厅重点项目(the Key Project of Department of Education of Hubei Province;China under Grant No.D200622003)