zhongyaoxing

this is a simpliest example to testing unit root

矩量法求八木天线的辐射问题，很有用处，欢迎学习指导(Method of Moments Yagi antenna radiation, useful, Welcome to the guide)

butterworth滤波器，实现高通低通带通的butterworth滤波器

说明：  filter line recognation iamge processing

分形的练习一 ①Koch曲线 用复数的方法来迭代Koch曲线 clear i 防止i被重新赋值 A=[0 1] 初始A是连接（0，0）与（1，0）的线段 t=exp(i*pi/3) n=2 n是迭代次数 for j=0:n A=A/3 a=ones(1,2*4^j) A=[A (t*A+a/3) (A/t+(1/2+sqrt(3)/6*i)*a) A+2/3*a] end plot(real(A),imag(A)) axis([0 1 -0.1 0.8]) ②Sierpinski三角形 A=[0 1 0.5 0 0 1] 初始化A n=3 迭代次数 for i=1:n A=A/2 b=zeros(1,3^i) c=ones(1,3^i)/2 A=[A A+[c b] A+[c/2 c]] end for i=1:3^n patch(A(1,3*i-2:3*i),A(2,3*i-2:3*i), b ) patch填充函数 end (Fractal Exercise One The ① Koch curve Plural iteration Koch curve clear i to prevent i is reassigned A = [0 1] initial A is a connection (0,0) and (1,0) of the segments t = exp (i* pi/3) n = 2 n is the number of iterations for j = 0: n A = A/3 a = ones (1,2* 4 ^ j) A = [A (t* A+ a/3) (A/t+ (1/2+ sqrt (3)/6* i)* a) A+2/3* a] end plot (real (A), imag (A)) axis ([0 1-0.1 0.8])   ② Sierpinski triangle A = [0 1 0.5 0 0 1] initialized A n = 3 the number of iterations. for i = 1: n A = A/2 b = zeros (1,3 ^ i) c = ones (1,3 ^ i)/2 A = [A A+ [c b] A+ [c/2 c]] end for i = 1:3 ^ n patch (A (1,3* i-2: 3* i), A (2,3* i-2: 3* i), b ) patch filled function end)

我在毕业设计时做的一个MATLAB实现图像的SIFT特征提取程序，并做在不同光照、不同视角下的 vZnbfT 特征匹配，还做了 zSCjeKh 特征值的提取转换，编译通过(I graduated the design of a MATLAB to achieve the image of the SIFT feature extraction process, and do in different light, different angles of the vZnbfT feature matching, but also to do the zSCjeKhfeature extraction and conversion, the compiler through)

矩阵逆运算，tsvd的算法，matlab函数程序(Matrix inverse operation, tsvd algorithm, matlab function procedures)

自适应信号处理，最终的权值矩阵就是滤波器的系数，学习曲线描述其收敛特性(Adaptive signal processing, the final weight matrix is the filter coefficient, the learning curve to describe the convergence properties)

《MATLAB与科学计算》（第2版）PPT教程 王沫然 电子工业出版社("MATLAB and Scientific Computing" (2nd edition) PPT tutorial,Wang Mo, Electronics Industry Press)

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