出处
《通讯和计算机(中英文版)》
2009年第9期10-16,共7页
Journal of Communication and Computer
基金
Acknowledgement: This work was supported by National Natural Science Foundation of China (No. 50804061), National High-Tech Research and Development Plan of China (No. 2006AA04AI23), Natural Science Foundation Project of CQ CSTC (No. CSTC, 2009BB2281), Research Foundation of the Chongqing Education Administration (No. KJ080514) and Natural Science Foundation of Chongqing University of Posts and Telecommunications tNo. A2007-49).