摘要
运用传统的和改进光滑度后的GM(1,1)模型分别对南京市年用水量进行建模预测。改进的GM(1,1)模型先对原始数据进行线性变换,再对变换后的数据应用GM(1,1)模型进行预测,有效提高了模型的拟合精度和预测精度。1998~2006年南京市用水量的建模结果分析表明,改进后的GM(1,1)模型预测用水量时拟合效果更好;2007~2009年用水量资料验证亦表明改进后的模型预测精度更高。
The traditional GM(1,1) model and improved GM(1,1) model are applied to forecast annual water consumption of Nanjing City,respectively.In improved GM(1,1) model,linear transformation is conducted on the original data and GM(1,1) model is used to forecast with the transform data,which raise the accuracy of fitting and prediction precision effectively.By analyzing and modeling of water consumption in Nanjing City during 1998~2006,the result shows that the improved GM(1,1) model has good fitting effect.Water consumption data during 2007~2009 also shows that the improved model has higher prediction accuracy.
出处
《水电能源科学》
北大核心
2011年第3期24-26,共3页
Water Resources and Power
基金
国家自然科学基金资助项目(51079046
50909041
50809025
50879024)
国家科技支撑计划课题基金资助项目(2006BAC14B03
2008BAB29B03)
河海大学水文水资源与水利工程科学国家重点实验室专项基金资助项目(2009586012
2010585212)
关键词
改进的GM(1
1)模型
线性函数变换
城市用水量
拟合
预测
improved GM(1
1) model
linear function transformation
city water consumption
fitting
prediction