-commerce sites have the characteristics of high dimension and data inhomogeneity, the new method combines PCA with the improved … OPTICS algorithm to classify and evaluate the e-commerce demonstration enterprise websites. Firstly, using PCA to reduce the …

Using the principal component analysis (PCA) and support vector regression machine (SVR) in predicting the credit … the method of PCA to filter and reduce the dimension of the data, and obtain five factors, namely, the evaluation factor … PCA's output as the input of the SVR for the credit rating prediction. Thirdly, they extract 300 as the training samples …