| 时空积和模型的数据插值与交叉验证 |
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| 引用本文： | 徐爱萍,圣文顺,舒红.时空积和模型的数据插值与交叉验证[J].武汉大学学报(信息科学版),2012,37(7):766-769,754. |
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| 作者姓名： | 徐爱萍 圣文顺 舒红 |
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| 作者单位： | 1. 武汉大学计算机学院,武汉市珞珈山,430072
2. 武汉大学测绘遥感信息工程国家重点实验室,武汉市珞喻路129号,430072 |
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| 基金项目： | 国家自然科学基金资助项目，湖北省自然科学基金资助项目 |
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| 摘 要： | 研究了时空变异函数和协方差函数的积和模型并将其推导成能够实现的形式,提出了时空权重系数的计算矩阵、基于该矩阵实现了积和模型的时空插值,并用时空交叉验证来验证了插值数据的有效性。实验表明,本方法能为时空随机领域以一定的精度提供较多的信息,从而达到时空插值的目的。
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| 关 键 词： | 时空插值 时空模型 交叉验证 变异函数 |
Spatiotemporal Interpolation and Cross Validation Based on Product-Sum Model |
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| XU Aiping,SHENG Wenshun,SHU Hong.Spatiotemporal Interpolation and Cross Validation Based on Product-Sum Model[J].Geomatics and Information Science of Wuhan University,2012,37(7):766-769,754. |
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| Authors: | XU Aiping SHENG Wenshun SHU Hong |
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| Institution: | 1 School of Computer,Wuhan University,Luojia Hill,Wuhan 430072,China)(2 State Key Laboratory for Information Engineering in Surveying,Mapping and Remote Sensing, Wuhan University,129 Luoyu Road,Wuhan 430072,China) |
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| Abstract: | In this paper,firstly,the expression of spatiotemporal is implemented;secondly,spatiotemporal product-sum model is analyzed and deduced into another one which can be calculated;thirdly,the spatiotemporal weight coefficient matrix based on ordinary kriging is put forward and the spatiotemporal interpolation is done based on this matrix;lastly,the performance of spatiotemporal interpolation is tested by cross validation.The experiment shows that spatiotemporal interpolation researched in here can provide more information on spatiotemporal random domain with some certain accuracy so as to achieve the spatiotemporal interpolation results. |
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| Keywords: | spatiotemporal interpolation product-sum model cross validation variogram |
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