基金Supported by the Scientific Research Fund of Hunan Provincial Education Department(09A080)the Scientific Research Founds for "New Century Engineering of ‘121’Talents in Hunan Province"the Returned Overseas Chinese Scholars in University of South China
基金Project supported by the Natural Science Foundation of China(No.60572093)Specialized Research Fund for the Doctoral Program of Higher Education of China(No.20050004016)NSFC-KOSEF Joint Research Project and IITA Professorship Program of Gwangju Instiute of Science and Technology