摘要
针对粮食产量波动较大,单一预测模型不能实现精确预测问题,提出一种基于熵权法的灰色组合模型.利用熵权法对预测误差较小的DGM(1,1)和多元线性回归模型进行定权组合,并分别对我国2010—2015年粮食产量进行预测,结果表明,用改进的组合模型预测的粮食产量误差更小.
In order to solve the problem that a single prediction model can not fit the data sequence with big fluctuations accurately, this paper puts forward the grey combination model based on entropy weight method, combines the DGM ( 1, 1 ) model with multiple linear regression model, uses the entropy weight method to determine the weight of the results of two models, and forecasts the grain yield form 2010 to 2015. The results show that the simulation precision of improved combination model is higher.
出处
《河南科学》
2017年第11期1895-1900,共6页
Henan Science
基金
河南省哲学社会科学规划项目(2016BJJ022)
河南省软科学项目(172400410015)
关键词
DGM(1
1)
线性回归
熵权法
组合模型
粮食产量
DGM(1,1)
multiple linear regression
entropy weight method
combination forecasting
grain yield