摘要
针对GM(1,1)模型预测的不足,对其进行修正得到修正模型,并利用芜湖市耕地变化进行实例验证和应用。结果表明:1)应用灰色预测的修正模型对耕地变化进行预测比直接应用灰色预测模型更精确;2)分段建模和建立灰色—马尔柯夫模型是从两个不同的角度对GM(1,1)模型进行修正,但两者可以相互结合,使预测结果更准确。3)建立灰色—马尔柯夫模型可以避免其他多种影响因素,更具科学性和实用性。
Based on the disadvantages of GM(1,1) prediction, this paper tries modifying it, and the modifying model is identified by the prediction of arable land in Wuhu City. The result shows: the prediction of modifying modal is more precise than GM(1,1) ; the subsection modification and Markov modification make correction from two different aspects, but can reinforce each other for better resuits. Therefore, the optimized GM(1,1 ) model can precisely carry on the farming forecast and provide the theoretic base for the advanced research.
出处
《地理与地理信息科学》
CSCD
北大核心
2006年第5期107-110,共4页
Geography and Geo-Information Science
基金
国家自然科学基金项目(40571162)
安徽省自然科学基金项目(050450401)
关键词
灰色预测
模型修正
耕地
芜湖市
grey prediction
model modification
arable land
Wuhu City