osc_filter

说明：  MATLAB编写的数值分析实验的一些小程序(MATLAB prepared by the numerical analysis of a number of small experimental procedure)

数值分析是一门比较实用的课程，在数学建模等方面应用广泛，这些代码里面几乎涵盖了全部的数值分析方法。(Numerical analysis is a more practical curriculum, widely used in mathematical modeling, etc., these codes which cover almost all of the numerical analysis method.)

dtft程序图源代码，本科生毕业设计程序( DTMF, by itself, creates a new DTMF or raises the existing )

有限元QuadTriangleElement的matlab程序(FEA matlab QuadTriangleElement)

蒙特卡洛算法也常用于机器学习，特别是强化学习的算法中。一般情况下，针对得到的样本数据集建立相对模糊的模型，通过蒙特卡洛方法对于模型中的参数进行选取，使之于原始数据的残差尽可能的小。从而达到建立模型拟合样本的目的。(Monte Carlo algorithm is also commonly used in machine learning, especially in reinforcement learning algorithm. In general, a relatively fuzzy model is established for the obtained sample data set, and the parameters in the model are selected by Monte Carlo method so that the residual error of the original data is as small as possible. Thus, the purpose of establishing the model fitting sample is achieved.)

M=512 原图像长度 N=64 K=8 I=zeros(M,M) J=zeros(N,N) BLOCK=zeros(K,K) 显示原图像 I=imread( f:ceshiyuanshitu.bmp ) figure imshow(I) xlabel( 原始图像 ) 显示水印图像 J=imread( f:ceshilogistic_nuaa64.bmp ) figure imshow(J) xlabel( 水印图像 ) 嵌入水印 tem=1 for p=1:N for q=1:N x=(p-1)*K+1 y=(q-1)*K+1 BLOCK=I(x:x+K-1,y:y+K-1) BLOCK=dct2(BLOCK) if J(p,q)==0 a=-1 else a=1 end BLOCK(2,1)=BLOCK(2,1)*(1+a*0.01) BLOCK=idct2(BLOCK) I(x:x+K-1,y:y+K-1)=BLOCK end end 显示嵌入水印后的图像 figure imshow(I) xlabel( 嵌入水印后的图像 ) imwrite(I, f:ceshiembedded.bmp )

神经网络PID仿真程序,直接导入MATLAB就可以运行(PID neural network simulation program directly into MATLAB on the run)

Matlab仿真：采样次数与信号的信噪比的关系曲线图。(Matlab simulation: the number of samples and the signal to noise ratio of a plot.)

DC Motor Thermal Circuit The demo illustrates how the thermal behavior of a motor can be simulated in lumped parameters.

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