机构地区: 西安理工大学理学院
出 处: 《西南民族大学学报(自然科学版)》 2007年第5期1070-1074,共5页
摘 要: GM(1,1)模型是一种应用广泛的呈指数增长趋势的灰色系统模型.它的拟合精度与建模数据序列的光滑度有关.建模数据序列光滑度越高,灰色系统模型的精度越高.根据线性函数变换和逆变换的知识,提出了通过对建模数据进行线性函数y=px+q变换来提高灰色模型拟合精度的一种简便方法,并且从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.算例分析的结果表明,对建模数据序列进行线性函数y=px+q变换的方法在提高灰色GM(1,1)模型拟合精度方面是有效的. GM(1,1) model is an exponential increasing tendency grey system model used widely. Its fitting precision is related to the smooth degree of modeling data sequence. If the smooth degree of modeling data sequence is higher, the precision of grey system model is higher. According to knowledge of linear function transformation and inverse transformation, a simple method of linear function y = px + q transformation against modeling data is put forward to improve fitting precision of grey system model. The smooth degree of modeling data sequence is proved after this transformation can be enhanced. The result of numerical example shows that the method of linear function y = px + q transformation against modeling data is effective in the case of improving fitting precision of grey GM(1,1) model.