chap_10

test for modal analysis

PLC matlab 信道模型，主要是电力载波信道中的多径数据(PLC channel Model)

矩阵变换函数,可通过该函数实现三位是两的绕轴变换(Matrix transformation function, can be accessed through the function of the three two-axis transformation)

主要是MIMO-OFDM系统的C++语言实现，简单实用，值得一看。(This is a C++ language of MIMO-OFDM system, simple and practical, worth a visit.)

用实验方法测试RLC串联谐振电路的幅频特性曲线。当正弦交流信号的频率f改变时，电路的感抗、容抗随之而变.取电路电压U0作为响应，当输入电压Ui幅值维持不变时，在不同信号频率的激励下，测出U0之值，用LabVIEW程序完成频谱分析和滤波，变换等信号处理，即可测出RLC串联电路的谐振频率，(Amplitude-frequency characteristics experimentally tested RLC series resonant circuit curve. When changing the frequency f of the sinusoidal AC signal, the circuit inductance, capacitance change with Take circuit voltage U0 as a response when the amplitude of the input voltage Ui unchanged, signals at different excitation frequencies, the measured value U0, the process is complete spectrum analysis using LabVIEW and filtering, transform signal processing, can be measured RLC series circuit resonant frequency,)

对称阵子天线的方向函数与方位角无关，及方向图是以振子轴线为基准的旋转对称图形，这(Symmetry time around antenna azimuth direction has nothing to do with the function, and the pattern is rotational symmetry axis vibrator graphics benchmark, which)

Conversion istruction for assembler,the are the first istruction for a programm of emulator,in particolar with the programm emu8086

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 )

This function extract a binary image gray scale image using auto-tuned threshold value obtained the correlation of Image euler numbers. This work had been published in L.P Wong, H.T Ewe. A Study of Lung Cancer Detection using Chest X-ray Images. 3rd APT Telemedicine Workshop 2005, 27-28th January 2005, Kuala Lumpur, Malaysia. Pages 210-214.

电子书籍：MATLAB优化算法案例分析与应用 课本源码：MATLAB优化算法案例分析与应用(Electronic Books: Case Analysis and Application of MATLAB Optimized Algorithms Textbook source code: case analysis and application of MATLAB optimization algorithm)