sag_Hilber

Modelo de dos rayos de Andrea Goldsmith (figura 2.5, según expresión 2.12) f = 0.9 frecuencia en GHz landa = 0.3/f en m R = -1 coeficiente de reflexión en tierra ht = 10 altura del transmisor en m hr = 2 altura del receptor en m Gt = 1 Gr = 1 Pt = 1 d=10:.1:100000 phase_diff = 4*pi*ht*hr./(landa*d) aproximación Pr = Pt*((landa/(4*pi))^2)*((abs((sqrt(Gt)./d) + (R*sqrt(Gr).*(exp(-sqrt(-1)*phase_diff)))./d)).^2) Pr = Pt*((landa/(4*pi))^2)*(1./d).*((abs((sqrt(Gt)) + (R*sqrt(Gr).*(exp(-sqrt(-1)*phase_diff))))).^2) figure(1), clf, plot((d),10*log10(Pr/max(abs(Pr)))) grid xlabel( log_1_0(d) ) ylabel( Potencia recibida (dBm) )

说明：   运用MATLAB编程得到简单信号、简单信号运算、复杂信号的谱和功率谱图，复杂信号的谱存在线谱和连续谱，并分析其组成。(Be simple to use MATLAB programming signal, a simple signal computing, complex signal and power spectrum of the spectrum, the existence of complex signal spectrum line spectrum and continuous spectrum, and to analyze its composition.)

说明：  matlab的qpsk-fading的程序代码 是初学者的福音(The qpsk-fading matlab program code is the gospel for beginners)

格子Boltzmann方法，D2Q9模型，模拟多孔介质流动(Lattice Boltzmann method, D2Q9 model to simulate the flow in porous media)

对一随机信号进行AR模型的谐波估计,包括不同采样点数(Harmonics of a random signal AR model estimates, including different sampling points)

说明：  读取地震数据的道头字并画出剖面图, 没有读出所有的道头，只读取了几个角为重要的(read headers of seismic data and draw the profile)

greypred.rar用于GDP预测，较为精准，误差小，程序简单，容易操作，实用。是很好的预测程序。(liner fit)

说明：  时频分析工具箱，还有说明和源程序。很好的东西(Time-frequency analysis toolbox, as well as notes and source code)

NCO产生正余弦振荡波的matlab程序，很实用。(NCO generate cosine Sasser' s matlab program is very practical.)

根据cpso算法给出的一个matlab代码，全，添加测试函数即可运行(According cpso given an algorithm matlab code, full, add test functions to run)