基金This Work is Supported by the National Natural Science Foundation of China (No.10771179)the Henan Innovation Project for University Prominent Research Talents(No.2005KYCX017)the Scientific Research Foundation for the Returned Overseas Chinese Scholars,State Education Ministry
基金Natural Science Foundation of Educational Department of Henan Province(2009B110019)The Backbone Youth Teacher Foun-dation of Xinyang Normal University
基金the National Natural Science Foundation of China (10471117)the Henan Innovation Project for University Prominent Research Talents(2005KYCX017)the Youth Science Foundation of Xinyang Normal University(20070209)