出处
《通讯和计算机（中英文版）》
2005年第7期37-41,共5页
Journal of Communication and Computer
基金
This work is supported by National Natural Science Foundation of China（No.79970025）, Hubei Provincial Department of Education Foundation under Grant No.2003X130, and Scientific Research Team of Wuhan Polytechnic University under Grant No.03-T-06.
The Gray Model
The Grade Difference Format
Poor Information
Error
