摘要
基于函数变换理论,提出了对建模数据进行ax+b(a<0,ax+b>0)变换,理论上证明了这种变换可以有效提高建模数据序列的光滑度。并把此方法应用于我国市均医院床位数的建模中,应用结果表明,该方法所建GM(1,1)模型的精度优于传统GM(1,1)模型的精度,从而拓宽了灰色模型的应用范围。
Based on function transformation theory, the method of ax＋b（a〈0,ax＋b） 0） transformation against modeling data is put forward. It has been proved that the smooth degree of modeling data sequence after this transformation can be enhanced. And the method is applied in the model of the number of Chinese per city hospital＇s beds. The practical application shows that precision of the GM（1,1） model based on the data transformation is better than precision of the traditional GM（1,1） model. This method can widen range of applieation of grey model.
出处
《青岛科技大学学报（自然科学版）》
CAS
2008年第2期182-184,188,共4页
Journal of Qingdao University of Science and Technology:Natural Science Edition
关键词
GM(1
1)模型
光滑度
函数变换
精度
GM（1,1） modell smooth degree
function transformation
precision
