task3

ofdm 的仿真与实现，可以直接运行的，run为运行文件(ofdm fangzhenyushixian)

this code is solution of optimal control

here to import the pictures and how to segment the picture. how to add the noise. some screen shots will be added this file.

用FFT和FIR方法实现MTD处理()

使用二分坐标下降法实现对乘正定系数矩阵的求逆计算(DCD Matrix INV)

在matlab环境上 用几何绕射法计算缝隙的辐射场(in Matlab environment using GTD method of the radiation field slot)

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病态方程组的数值解法，Guass，Jacobi，SOR iteration，conjugate gradient method(numerical solution of ill-conditioned system of equations，Guass，Jacobi，SOR iteration，conjugate gradient method )

给出了关于图像的多种处理方法，并且自己相处了想出了分水岭算法的改进(Given a variety of approaches to image processing, and got along with the idea of an improved watershed algorithm)

svd水印算法,运用svd分解来嵌入水印，抗噪性和鲁棒性都很好(svd watermarking algorithm)