matlab_audio

Matlab编程学习资料，对初学者有帮助。。。(Matlab programming to learn information useful for beginners. . .)

最短路径的MATLAB语言算法，最经典的算法，图形显示结果(The MATLAB language of the shortest path algorithm, the classic algorithm，Graphical display results )

输入一个句子后，通过点击按钮，可以得到本句子的单词个数与句子的个数(Enter a sentence, by clicking on the button, you can get the number of words in this sentence and the number of sentences)

提供matlab信号处理的几个典型示例，含系统响应、傅里叶变换、滤波器设计等(signal processing examples using matlab)

PID参数整定软件，包括飞升曲线法和稳态边界法(PID parameter tuning software, including the soaring curve and steady-state boundary method)

Precision Recall Curve

自组织神经网络概念和原理，并重点介绍一下自组织特征映射SOM网络。SOM和现在流行的ANN（MLP）模型在结构上类似，都由非常简单的神经元结构组成，但是SOM是一类“无监督学习”模型，一般的用法是将高维的input数据在低维的空间表示[1]，因此SOM天然是一种降维方法。除了降维，SOM还可以用于数据可视化，以及聚类等应用中。(The concept and principle of self-organizing neural network are introduced, and the self organizing feature mapping SOM network is introduced. SOM and the now popular ANN (MLP) model is similar in structure, the neuron structure very simple, but SOM is a kind of "unsupervised learning" model, the general is the use of input data with high dimension in the low dimensional space for [1], so SOM is a kind of natural dimensionality reduction method. In addition to dimensionality reduction, SOM can also be used in data visualization, clustering and other applications.)

function gmodify(pic,uv,gm,og) %pic表示要处理的图像的路径文件名 %uv是一个二维矩阵,uv(:,1)代表上面提到的,uv(:,2)表示 %gm是一个二维矩阵,gm(j,:)代表在校正图空间上与uv(j,:)一一应的点 %og 代表对称中心，它是一个二维向量 a=imread(pic); b=double(a); n=size(gm(:,1)); for k=1:n%转换到以对称点为原点的空间关系并构造矩阵A A(k,:)=[1,gm(k,1)-og(1),gm(k,2)-og(2),(gm(k,1)-og(1)^2), (gm(k,1)-og(1))*(gm(k,2)-og(2)),(gm(k,2)-og(2) ^2)]; end [h,w]=size(b(:,:,1)); sp=zeros(h,w,3)+255; a0=pinv(A)* uv(:,2); %计算上面提到的地址映射的系数估计a b0=pinv(A)* uv(:,1); %计算上面中提到的地址映射的系数估计b for i=1:h %从理想图像矩阵出发处理 for j=1:w x=[1,j-og(1),i-og(2),(j-og(1))^2,(i-og(2))*(j-og(1)),(i-og(2))^2]; u=x*a0+og(2); % 逆向映射（j，i）到畸变图像矩阵（v，u） v=x*b0+og(1); if (u>1)&&(u1)&&(v

总体最小二乘法的ESPRIT方法，这种算法的估计精度明显好于原来的ESPRIT算法。可以很好的估计出信号的角度。仿真中用的是均匀阵列。-Total least squares method of the ESPRIT method, the algorithm of the estimation accuracy significantly better than the original ESPRIT algorithm. Can be a very good signal to estimate the angle. Simulation using the uniform array.

1.本程序可从普通数据中根据自己设定的对象进行定向识别； 2.本程序可自由定义设定的对象； 3.本程序识别筛选出对象，并标明其位置；