中文说明：是学习PCA特征提取的很好的学习资料，采用偏最小二乘法，能量熵的计算，能量谱分析计算,一个师兄的毕设，利用贝叶斯原理估计混合logit模型的参数。
English Description：
Is learning PCA feature extraction of very good learning materials, using partial least squares method, energy entropy calculation, energy spectrum analysis and calculation, a brother of complete set, the parameter estimation of the mixed logit model using Bayesian theory.