是学习PCA特征提取的很好的学习资料，GPS和INS组合导航程序，阐述了负荷预测的应用研究,利用自然梯度算法，包括随机梯度算法，相对梯度算法。- Is a good learning materials to learn PCA feature extraction, GPS and INS navigation program, It describes the application of load forecasting, Use of natural gradient algorithm, Including stochastic gradient algorithm, the relative gradient algorithm.