基金The Humanities and Social Science Research Youth Foundation of Ministry of Education(11YJC790006)the Higher School Science and Technology Development Foundation of Tianjin(20100821)
基金supported by the Higher School Science and Technology Development Foundation of Tianjin(20100821)the Humanities and Social Science Research Youth Foundation of Ministry of Education (11YJC790006)
基金This research was supported by the National Natural Science Foundation of China (10261005)Colleges and Universities' Science and Technology Development Foundation (20040401) of Tianjin