土壤学报2011，Vol.48Issue(3)：461-469,9.
基于支持向量机的典型冻土区土壤制图研究
SUPPORT VECTOR MACHINE BASED SOIL MAPPING OF A TYPICAL PERMAFROST AREA IN THE QINGHAI-TIBET PLATEAU
摘要
Abstract
Based on field investigations conducted in the 1980s of Wenquan District, Xinghai County, Qinhai Province, a large tract of permafrost on the east edge of the vast Qinghai-Tibetan Plateau ( QTP), new approaches to soil mapping were explored. Based on the theory of soil forming factors and the theory for soil-landscape modeling and the screening of potential variables in soil classification, a soil-landscape model was built up using SVM coupled with various combinations of the variables, and applied to predictive soil classification of the studied area. To better verify effectiveness of the new approach, a 5-fold cross validation method was used. By comparing the outcomes of the cross validation of the various variable combinations as well as the derived distribution maps, a set of combination of environmental variables was defined suitable for soil classification of typical permafrost area. Thus fewer samples are needed to better predict spatial distribution of the types of soils in the area.关键词
土壤制图/支持向量机/多年冻土区/土壤分类Key words
Soil mapping/ Support vector machine (SVM)/ Permafrost/ Soil classification分类
农业科技引用本文复制引用
石伟,南卓铜,李韧,赵林,张秀敏,赵拥华..基于支持向量机的典型冻土区土壤制图研究[J].土壤学报,2011,48(3):461-469,9.基金项目
科技部基础性工作专项(2008FY110200)、科技部863项目(No.2008AA12Z205)和国家自然科学基金项目(40871037)资助 （2008FY110200）
