合成孔径雷达（SAR)目标成像仿真，采用累计贡献率的方法，包括最小二乘法、SVM、神经网络、1_k近邻法。- Synthetic Aperture Radar (SAR) imaging simulation target, The method of cumulative contribution rate Including the least squares method, the SVM, neural networks, 1 _k neighbor method.