Results: The variograms model and its epidemiology implication were obtained.
结果：获得疾病空间分布变异函数模型及其流行病学含义。
The variograms of arsenic persistently increased and could be fitted by exponential equation.
土壤砷含量半方差值呈有规律持续增加趋势，可用指数方程很好地拟合。
The fractal dimensions of soil cone indices were estimated in semi-variograms and power, spectral densities, which were all very close to 2.
运用分形和分维理论，用半方差法和功率谱密度法分别计算土壤强度的分维，其值接近2。
But all directional variograms have good spatial structures in their range, and all their theoretical models are the Gauss models with nugget effect.
但在变程内具有显著的空间结构性特点，其各个方向上变异函数的理论模型均为具有块金效应的高斯模型。
Spatial distribution maps and (semi -) variograms that can explicitly explain the random and structural variability of soil salinity were also mapped.
绘制了各土层盐分的随机性和结构性的半方差图以及空间分布图。
Systematic description of the regionalized variable theory is presented and the theory is applied to study the variograms model and structural analysis in the light of a practical example.
系统介绍了区域化变量理论，并根据理论结合实例进行了变异函数的理论模型和结构分析研究。
Systematic description of the regionalized variable theory is presented and the theory is applied to study the variograms model and structural analysis in the light of a practical example.
系统介绍了区域化变量理论，并根据理论结合实例进行了变异函数的理论模型和结构分析研究。
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