基金the 2008 Project of Scientific Research Foundation for the Returned Overseas Chinese Scholars(2008年教育部留学回国人员科研启动基金)the Science-Technology Project of Guangdong Province of China under Grant No.2007B030803006(广东省科技攻关项目)the Science-Technology Project of Hubei Province of China under Grant No.2005AA101C17(湖北省科技攻关项目)