地学统计学作业

地学统计学测试题

现有一批沿一维分布的地质勘探（钻探和刻槽两种方式）取样数据，存储在Access数据库中，每个样品均有铁、铜、硫三种元素的化验品位，假设每个样品的长度相同。从中任选两个工程的取样数据，完成下列任务：

1．以所选工程总长度之半为最大滞后距分别计算两个元素品位（从铁、铜、硫中任选两个）的实验变异函数值，并提供程序源代码；（30+10分）

2．选取球状模型拟合变异函数理论模型（采用直接拟合法时必须提供图形），并提供源代码；（30+10分）

3．分别对比、分析同一工程的两个元素品位及不同工程的同一元素品位的变化特征。（20分）

-Geostatistic job to learn a number of existing statistical test questions along the one-dimensional distribution of geological exploration (drilling and grooving in two ways) sampling data in an Access , each sample are iron, copper, sulfur, three elements are stored laboratory grade, assuming the same length of each sample. Optional sampling data　the two projects, complete the following tasks: 1. In half of the total length of the selected works for the maximum lag of two elements were calculated　the experimental variograms grade value (optional　iron, copper, sulfur, two), and provides source code　(30+10 points) 2. Select spherical variogram model fitting theoretical models (intended to be provided with direct graphical lawful), and provide the source code　(30+10 points) 3. Were compared to analyze variation of the same elements of the two elements of different projects in the same grade and quality of the project. (20 points)