中文说明：雅克比迭代求解线性方程组课设,借鉴了主成分分析算法（PCA），matlab实现了五类灰色关联度模型的计算,FIR 底通和带通滤波器和IIR 底通和带通滤波器，复化三点Gauss-lengend公式求pi，是一种双隐层反向传播神经网络。
English Description：
Jacobi iteration for solving linear equations course design, using principal component analysis (PCA) algorithm and matlab calculation of five gray correlation model, at the bottom of the fir pass and band-pass filter and IIR bottom pass and band-pass filter, a complex of three Gauss-lengend formula for PI a double hidden layer backpropagation neural network.