供做算法研究人员参考，BP神经网络用于函数拟合与模式识别，FIR 底通和带通滤波器和IIR 底通和带通滤波器，加入重复控制，毕业设计有用，包括面积、周长、矩形度、伸长度。-Algorithm for researchers to do reference, BP neural network function fitting and pattern recognition, Bottom-pass and band-pass FIR and IIR filter bottom pass and band-pass filter, Join repetitive control, Graduation useful Including the area, perimeter, rectangular, elongation.