加权距离判别法在膨胀土胀缩等级分类中的应用

利用主成分分析法改进距离判别分析法，然后将该方法应用于膨胀土胀缩等级分类中，建立膨胀土胀缩等级分类的加权距离判别分析模型。选取黏粒含量、粉粒含量、液限、塑限和塑性指数等5项指标作为膨胀土胀缩等级判别因子，利用已经测得的膨胀土数据为训练样本进行学习，建立相应的判别函数。然后对待判样本进行判别分类，该判别分类结果与实测分类结果100％吻合。研究结果表明，加权距离判别方法完善了距离判别分析法理论，该方法分类性能良好，预测精度高，在实际工程应用中有广阔的前景。

The application of weighted distance discriminate analysis to classification of expansive soils

In this paper,based on the principal component analysis to improve distance discriminate analysis, then to apply this method into classification of expansive soil,the weighted distance discriminate analysis mode for classification of expansive soils has been established,including five indexes reflecting the shrink and expansion of expansive soil,such as content of clay grain,content of silt grain,liquid limit,plastic limit and plasticity index.Discriminate functions have been built through training the tested expansive samples data.The other expansive soil samples are tested by the model,and the correct rate between the discrimi-nate analysis results and testing results is 100%.The research results show that the weighted distance method improves the theory of distance discriminate analysis method,and the weighted distance discrimi-nate analysis method performs excellently,with high predicting accuracy,and has wide applying prospect in practical constructions.