中文说明： 复化三点Gauss-lengend公式求pi，线性调频脉冲压缩的Matlab程序,二维声子晶体FDTD方法计算禁带宽度的例子,DSmT证据推理的组合公式计算函数，实现了图像的加水印，去噪，加噪声等功能，实现用SDRAM运行nios，同时用SRAM保存摄像头数据。
English Description：
The matlab program of linear frequency modulation pulse compression, the example of two-dimensional phononic crystal FDTD method to calculate the band gap, the combination formula calculation function of DSmT evidential reasoning, realize the image watermark, denoising, noise and other functions, realize the operation of Nios with SDRAM, and save the camera data with SRAM.