摘要
根据灰色系统建模思想建立了建筑物沉降的非等间隔GM(1,1)模型,并分析了该模型的缺陷,即背景值构造和初始值确定的不足,建立了加权背景值和具有修正项的初始值,背景值权值和初始值修正项采用具有全局寻优能力的模式搜索法求解,实例应用结果证明改进后的模型提高了预测精度。
The non-equal interval GM （ 1, 1 ） model is built based on gray system modeling idea. In order to analyze its defect, such as the deficiency of the construction of background value, the choice of initial value, the weighted construction of background value and the initial value with a correction term are all pointed out. The weight of background value and the correction term of the initial value are worked out by pattern search method, which can seek the global excellence. Test results show that the improved non-equal interval GM （1, 1） model can increase the forecasting precision.
出处
《工程勘察》
CSCD
北大核心
2010年第3期77-80,共4页
Geotechnical Investigation & Surveying
基金
中国地质大学大学生科研立项基金(2009-133)
关键词
沉降预测
非等间隔GM(1
1)模型
缺陷
模式搜索
subsidence forecasting
non-equal interval GM （ 1, 1） model
defect
pattern search
