基于主成分聚类法的典型黑土区土壤地球化学分类
刘凯, 戴慧敏, 刘国栋, 宋运红, 梁帅, 杨泽

Geochemical classification of the soil in a typical black soil area using the principal component analysis combined with K-means clustering algorithm
LIU Kai, DAI Hui-Min, LIU Guo-Dong, SONG Yun-Hong, LIANG Shuai, YANG Ze
图9 不同类别所包含地质单元的累积频率
Fig.9 Cumulative frequency map of geological units in different classifications