Multi-frequency-signals-filtering

MEDFILT3 1-D, 2-D and 3-D median filtering.

某统计局欲了解第三产业总产出、中间消耗、增加值、劳动者报酬、生产税净额、固定资产折旧、营业盈余之间的关系，根据下面给出的数据建立相应的模型并进行分析，同时又因为变量数目过多影响对其的综合分析，要求对他们进行主成分分析；(Bureau of Statistics For a third of total industrial output, intermediate consumption, value added, workers compensation, production, net of tax, depreciation of fixed assets, the relationship between the operating surplus, in accordance with the following data given by the model and the corresponding analysis, at the same time, because too many variables affect the number of comprehensive analysis of its request for them to carry out principal component analysis )

一些MATLAB应用程序，MATLAB计算机模拟(Some MATLAB application, MATLAB simulation)

ch3=softt(h3,thr1 clear clc I=imread( lena512.bmp ) imshow(I) I=double(I) II=I+30*randn(size(I)) figure imshow(II,[]) [a1,h1,v1,d1]=dwt2(II, sym8 ) [a2,h2,v2,d2]=dwt2(a1, sym8 ) [a3,h3,v3,d3]=dwt2(a2, sym8 ) sigma=median(abs(d1(:)))/0.6745 x=3*sigma thr1=x*2^(-1) thr2=x*2^(-0.5) thr3=x 小波图像去噪( ch3=softt(h3,thr1 clear clc I=imread( lena512.bmp ) imshow(I) I=double(I) II=I+30*randn(size(I)) figure imshow(II,[]) [a1,h1,v1,d1]=dwt2(II, sym8 ) [a2,h2,v2,d2]=dwt2(a1, sym8 ) [a3,h3,v3,d3]=dwt2(a2, sym8 ) sigma=median(abs(d1(:)))/0.6745 x=3*sigma thr1=x*2^(-1) thr2=x*2^(-0.5) thr3=x )

基本粒子群算法的部分代码，有详细注释,适合初学者(PSO part of the code, there are detailed notes, suitable for beginners)

matlab实现泊松分布产生随机数的程序， 挺管用的(The matlab Poisson distribution to generate random numbers, very handy)

利用自适应陷波器滤去信号中的50Hz工频干扰(The use of adaptive notch filter filtered signal 50Hz frequency interference)

用于实现IEEE33节点配电网系统中接入5个微电网的最优注入功率优化，使用粒子群算法实现。(Used to achieve access to the IEEE33 5 node distribution network system in micro grid optimal injection power optimization, using particle swarm algorithm)

说明：  赵力，语音信号处理，房间混响计算的简单模型。(Room reverberation calculation.)

现代通信系统常用matlab算法实例，适合大家学习matlab(Matlab algorithm commonly used in modern communication systems examples for them to learn matlab)