| 基于稳健统计学的水盐空间变差函数逼近方法 |
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| 引用本文： | 陈亚新,徐英,魏占民,史海滨.基于稳健统计学的水盐空间变差函数逼近方法[J].水利学报,2004,35(9):0044-0049. |
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| 作者姓名： | 陈亚新 徐英 魏占民 史海滨 |
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| 作者单位： | 内蒙古农业大学,水资源与水土工程研究所,内蒙古,呼和浩特,010018 |
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| 基金项目： | 国家自然科学基金资助项目(50179013) |
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| 摘 要： | 将稳健统计学（RS）引入地质统计学（GS），研究土壤水盐特性空间变异。重点研究了稳健型变差函数γR(h)的逼近原理和推求方法，本方法应用在大型灌区土壤水盐时空变异性预测和监测的结果表明，对于实际数据分布不严重偏离理想分布的条件下的中小样本，可以获得分布稳健和数据稳定的γR(h)及其估计量，这对于改善变差函数的结构性和理论模型的主要参数有明显效果。
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| 关 键 词： | 地质统计学 稳健统计学 特异值 稳健型变差函数 逼近 水-盐空间分布 |
| 文章编号： | 0559-9350(2004)09-0044-06 |
| 修稿时间： | 2003年4月8日 |
Approximation method for spatial variogram of water and salinity in soil based on Robust statistics |
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| CHEN Ya-xin.Approximation method for spatial variogram of water and salinity in soil based on Robust statistics[J].Journal of Hydraulic Engineering,2004,35(9):0044-0049. |
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| Authors: | CHEN Ya-xin |
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| Affiliation: | Inner Mongolia Agricultural University, Huhhot 010018, China |
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| Abstract: | The Robust statistics is combined with Geostatistics to study the spatial variability of water and salinity in soil. The principle for approximation of Robust variogram and its method are studied. The application of this method to forecasting and monitoring of spatial variability of soil water-salinity in large-scale irrigation area shows that the Robust distribution and stable vriogram can be obtained if the skewness of the statistics distribution of the samples with moderate-size or small-size does not seriously deviate from ideal distribution. This is effective for improving the structure of variogram and the parameters of its theoretical model. |
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| Keywords: | geostatistics robust statistics outlier robust variogram approximation spatial distribution of soil water-salinity |
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