variogram

Analysis of the isotropic variogram indicated that the distance of spatial dependence of the carpenterworm larvae was 7.3 m in the heavily-infested woodland and 87.418m in the lightly-infested one, while the intensity of local spatial continuity was 0.914 and 0.178, respectively.

根据全方向的变异函数曲线图分析得知：重度受害林分和轻度受害林分内幼虫种群的空间依赖范围分别为7.3m和87.418m，而局部空间连续性强度分别为0.914和0.178。

All this convenience in analyzing spacial data, which characterize the variogram and Kriging method of geostatistics, are the weakness of average value method and general statistics.

发挥了地质统计学中的变异函数、Kriging插值法分析、处理空间数据的优势，克服了平均值处理、常规统计方法所不能解决的困难。

The paper suggests an approach, utilizing the weighted polynomial regression for the best fitting of the variogram about spherical model or two-order nested spherical model.

本文提出了一种用加权多项式回归对球状模型和二级套合球状模型的变差函数进行最优拟合的方法。