| ͬʱ����x(1)(1)��x(1)(n)ΪGM(1,1) ��ģ��ʼ������Ԥ�ⷽ���о� |
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| 引用本文： | 袁德宝,崔希民,高宁.ͬʱ����x(1)(1)��x(1)(n)ΪGM(1,1) ��ģ��ʼ������Ԥ�ⷽ���о�[J].大地测量与地球动力学,2013,33(3):79-82. |
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| 作者姓名： | 袁德宝 崔希民 高宁 |
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| 作者单位： | 中国矿业大学(北京)地球科学与测绘工程学院,北京,100083 |
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| 基金项目： | 国家自然科学基金，国家重点基础研究发展规划(973)项目，教育部新世纪优秀人才支持计划资助项目，矿山空间信息技术国家测绘局重点实验室开放基金 |
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| 摘 要： | ????GM(1,1)???????????????????о????????????????x(1)(1)??x(1)(n)??????????GM(1,1)??????????????????x(1)(1)??x(1)(n)?GM(1,1)????????????·???????x(1)(t)?????????????????1-AGO???е???????????С?????????????????????????????????????????????????????????????????з?????????????????????????????÷?Χ?????????????????????????????????????GM(1,1)????????????????????GM(1,1)????
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| 关 键 词： | GM(1 1)??? ??????? ???? ???÷?Χ ??? |
A FORECAST METHOD COMBINING x(1) (1) WITH x(1) (n) AS INITIAL VALUE OF GM (1,1) MODEL |
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| Yuan Debao,Cui Ximin and Gao Ning.A FORECAST METHOD COMBINING x(1) (1) WITH x(1) (n) AS INITIAL VALUE OF GM (1,1) MODEL[J].Journal of Geodesy and Geodynamics,2013,33(3):79-82. |
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| Authors: | Yuan Debao Cui Ximin and Gao Ning |
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| Institution: | (College of Geoscience and Surveying Engineering,China University of Mining and Technology,Beijing 100083) |
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| Abstract: | In order to reestablish the initial value for GM (1,1) model, we proposed a new approach to improve prediction accuracy of GM(1,1) model through optimization of the initial value, which is comprised of the first and the ??n????th vector as the initialization, and derived from a method of least error summation of square. Then we discussed the parameter which affects the fitting results. By contrasting the improved one to the GM(1,1) about the simulation and prediction, we can conclude that the improved one is superior in prediction and simulation, and it is proved that the optimum one widen its suitable range. |
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| Keywords: | GM (1 1) model initial value parameter suitable range forecast |
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