基金Supported by National Natural Science Foundation of China(11271045)Research Fund for the Doctoral Program of China(20100003110004)+1 种基金Natural Science Foundation of Inner Mongolia(2010MS0117)Higher School Foundation of Inner Mongolia(NJzc08160)
基金The present investigation was supported by the Scientific Research Fund of Guangdong Provincial Education Department under Grant LYM08101the Scientific Research Fund of Hunan Provincial Education Department under Grant 08C118 of People's Republic of China