作者机构:[1]School of Mathematics, Qingdao University, Shandong 266071, P. R. China, [2]Center for Systems and Control, College of Engineering, Peking University, Beijing 100871, P. R. China, [3]School of Automation Engineering, Qingdao University, Shandong 266071, P. R. China
相关基金:Supported by the National Natural Science Foundation of China (Grant No. 60973048), the Natural Science Foundation of Shandong Province (Grant No. Y2007G30) and the Young Science Foundation of Qingdao University.