判别分析在黄土地层划分中的应用——以陕西洛川黄土剖面为例

Application of Discriminant Analysis in Classification of Loess ——Case Study of Standard Loess Profile in Luo Chuan,Shanxi

利用计算机技术 ,研究了判别分析在中国黄土地层划分中的应用 .选择了 8种微量元素和碳酸钙的含量作为划分三类黄土地层 (包括马兰黄土 ,离石黄土和午成黄土 )的指标 ,利用逐步判别的方法 ,建立了 3个费歇判别函数方程 ,提出了利用计算机分析技术进行地学分析应注意的问题 .结果表明 :判别函数的正确判别率为 93.33% .

The application of discriminant analysis in the classification of loess in Luochuan, Shanxi was researched. With the help of computer, the contents of 8 trace elements and calcium carbonate were used as the indexes to divide 3 types of loess, which are Malia Loess, Lishi Loess, and Wucheng Loess. The stepwise method was used in the establishment of three Fisher classification functions, in which 9 factors were chosen as variables. Some notices were put forward for geographic analyses using computers. The result shows that the accurate rate of discrimination test of these functions is 93.33%.