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Matlab-spectrumananalysis
该文给出了一种利用matlab系统实现频谱分析与显示的方法。该方法对语音信号进行基于FFT的短时频谱分析，频谱图的伪彩色映射及显示。(This paper presents a system implementation using matlab spectrum analysis and display methods. The method is based on the speech signal short-time FFT spectrum analysis, spectrum and display pseudo-color mapping.)
- 2010-10-23 17:02:41下载
- 积分：1
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faces
face database for face recognition
- 2011-01-28 18:34:49下载
- 积分：1
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MATLAB_image_processing_code(2)
说明： matlab图像处理 基础的各种算法代码 以供大家一起参考学习(MATLAB_digit_processing_code matlab)
- 2010-05-03 17:05:59下载
- 积分：1
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BP-OMP-StOMP
采用小波变换稀疏方法和正交匹配跟踪算法处理图像(Sparse wavelet method and orthogonal matching tracking algorithm)
- 2015-01-13 22:16:07下载
- 积分：1
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ex9
用基带等效方式仿真16-QAM载波调制信号在AWGN下的误码率(With the baseband equivalent simulation 16-QAM carrier frequency modulation signal in AWGN bit error rate)
- 2015-02-28 15:50:14下载
- 积分：1
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HuffCode
In computer science and information theory, a Huffman code is an optimal prefix code found using the algorithm developed by David A.
- 2015-03-31 04:23:32下载
- 积分：1
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piu_v73
多机电力系统仿真及其潮流计算，包括邓氏关联度、绝对关联度、斜率关联度、改进绝对关联度,包含光伏电池模块、MPPT模块、BOOST模块、逆变模块。( Multi-machine power system simulation and flow calculation, Including Deng s correlation, absolute correlation, correlation of slope, improved absolute correlation, PV modules contain, MPPT module, BOOST module, inverter module.)
- 2020-11-07 22:09:48下载
- 积分：1
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li9_23
clear all
I=imread( lena.bmp )
figure imshow(I)
I2=imrotate(I,-4, bilinear ) 逆时针旋转4度
figure imshow(I2)
I3=fliplr(I) 垂直镜像
figure imshow(I3)
I4=imresize(I,0.5, bilinear ) 缩小为原图的1/2
figure imshow(I4)
A=double(I) 转换为double类型
计算7个不变矩
[nc,nr]=size(A)
[x,y]=meshgrid(1:nr,1:nc) 得到网格
x=x(:)
y=y(:)
A=A(:)
m.m00=sum(A)
if m.m00==0
m.m00=eps
end
m.m10=sum(x.*A)
m.m01=sum(y.*A)
计算均值
xmean=m.m10/m.m00
ymean=m.m01/m.m00
计算中心矩(li9_23.rar
cm.cm00=m.m00
cm.cm02=(sum((y-ymean).^2.*A))/(m.m00^2)
cm.cm03=(sum((y-ymean).^3.*A))/(m.m00^2.5)
cm.cm11=(sum((x-xmean).*(y-ymean).*A))/(m.m00^2)
cm.cm12=(sum((x-xmean).*(y-ymean).^2.*A))/(m.m00^2.5)
cm.cm20=(sum((x-xmean).^2.*A))/(m.m00^2)
cm.cm21=(sum((x-xmean).^2.*(y-ymean).*A))/(m.m00^2.5)
cm.cm30=(sum((x-xmean).^3.*A))/(m.m00^2.5)
im(1)=cm.cm20+cm.cm02
im(2)=(cm.cm20-cm.cm02)^2+4*cm.cm11^2
im(3)=(cm.cm30-3*cm.cm12)^2+(3*cm.cm21-cm.cm03)^2
im(4)=(cm.cm30+cm.cm12)^2+(cm.cm21+cm.cm03)^2
im(5)=(cm.cm30-3*cm.cm12)*(cm.cm30+cm.cm12)...
*((cm.cm30+cm.cm12)^2-3*(cm.cm21+cm.cm03)^2)...
+(3*cm.cm21-cm.cm03)*(cm.cm21+cm.cm03)...
+(3*(cm.cm30+cm.cm12)^2-(cm.cm21+cm.cm03)^2)
im(6)=(cm.cm20-cm.cm02)*((cm.cm30+cm.cm12)^2-(cm.cm21+cm.cm03)^2)...
+4*cm.cm11*(cm.cm30+cm.cm12)*(cm.cm21+cm.cm03)
im(7)=(3*cm.cm21-cm.cm03)*(cm.cm30+cm.cm12)...
*((cm.cm30+cm.cm12)^2-3*(cm.cm21+cm.cm03)^2)...
+(3*cm.cm12-cm.cm30)*(cm.cm21+cm.cm03)...
*()
- 2010-10-17 21:53:14下载
- 积分：1
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PLC-analog
A programmable-logic controller (PLC) is a compact computer-based electronic system that uses digital or analog input/output modules to control machines, processes, and other control modules. A PLC is able to receive (input) and transmit (output) various types of electrical and electronic signals and use them to control and monitor practically any kind of mechanical and/or electrical system.
- 2013-07-19 19:40:51下载
- 积分：1
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simplex
Nelder-Mead. Comparative method to find minimimum of multivariable functions.
- 2013-03-16 22:07:58下载
- 积分：1
