作者机构:[1]State Key Laboratory of Integrated Service Networks, Xidian University, Xi'an 710071, China
相关基金:Foundation item: Project(2006AA01Z270) supported by the National High Technology Research and Development Program of China; Project(U0635003) supported by the National Natural Science Foundation of Guangdong Province, China; Project(2007F07) supported by the National Science Foundation of Shaanxi Province, China