shear-flow

说明：  matlab求解常微分方程在机械设计中的应用(matlab solving ordinary differential equations in mechanical design)

说明：  各种测试函数的源代码，包括ackleysfunction、braninfunction等(Various test functions of the source code, including ackleysfunction, braninfunction etc.)

傅立叶变换能将满足一定条件的某个函数表示成三角函数（正弦和/或余弦函数）或者它们的积分的线性组合。(Fourier transform can meet certain conditions expressed as a function trigonometric (sine and/or cosine functions) or their integral linear combinations.)

实现基于PSO的三维图形的极值计算，并显示中间的搜索过程。(Implementation is based on PSO to calculate the extremum of 3 d graphics and display in the middle of the search process.)

matlab编写的Newmark法计算多自由度体系动力问题的通用程序，很实用！(Newmark method matlab prepared multi-degree of freedom system power issues common procedures, very practical!)

说明：  直接序列扩频通信系统建模与仿真编程，直接序列扩频通信系统建模与仿真编程。(Direct sequence spread spectrum communication system modeling and simulation programming, direct sequence spread spectrum communication system modeling and simulation programming.)

例3：分析占空比为ta的矩形脉冲频谱 T=1 时间窗大小 ta=0.5 占空比 N=256 t=linspace(-T,T,N) ts=2*T/N fs=1/ts (x=zeros(1,N) x(N/2-round(N/2*ta):N/2+round(N/2*ta))=ones(1,2*round(N/2*ta)+1) y=fft(x,N) figure plot(t,x) title([ 时域信号图 占空比为 ,num2str(ta)]) axis([-T T-0.2 1.2]) xlabel( t /s ) figure subplot(211) f=linspace(-fs/2,fs/2,N) plot(f,abs(fftshift(y))/N) title([ 矩形脉冲双边谱 脉冲时间t=[- ,num2str(ta*T), , ,num2str(ta*T), ] ]) xlabel( f /Hz ) )

CDMA中的扩频编码，用matlab实现(Spread Spectrum CDMA coding, using Matlab achieve)

AHP层次分析法计算判断矩阵的最大特征值,是学习PCA特征提取的很好的学习资料，STM32制作的MP3的全部资料。( Calculate the maximum eigenvalue judgment matrix of AHP, Is a good learning materials to learn PCA feature extraction, STM32 all the information produced by the MP3.)

Matlab Simulations for radar systems 电子版书的源码。希望有用。(Matlab Simulations for radar systems the electronic version of the book)