Amplificadordireccionalpiramidal

利用matlab实现电流环周围的电磁场的数值计算，利用有限元方法(Using matlab to achieve numerical electromagnetic field around the current loop, using the finite element method)

产生右图所示图像f1(m,n)，其中图像大小为256×256，中间亮条为128 ×32，暗处=0，亮处=100。对其进行FFT： ① 同屏显示原图f1(m,n)和FFT(f1)的幅度谱图； ② 若令f2(m,n)=（-1）m+n f1(m,n)，重复以上过程，比较二者幅度 谱的异同，简述理由； ③ 若将f2(m,n)顺时针旋转90 度得到f3(m,n)，试显示FFT(f3)的幅 度谱，并与FFT(f2)的幅度谱进行比较； ④ 若将f1(m,n) 顺时针旋转90 度得到f4(m,n)，令f5(m,n)=f1(m,n)+f4(m,n)，试显 示FFT(f5)的幅度谱，并指出其与FFT(f1)和FFT(f4)的关系； ⑤ 若令f6(m,n)=f2(m,n)+f3(m,n)，试显示FFT(f6)的幅度谱，并指出其与FFT(f2)和 FFT(f3)的关系，比较FFT(f6)和FFT(f5)的幅度谱。(Generating an image f1 (m, n) shown in the figure, wherein the image size is 256 256, the intermediate light bar 128 32 0 = dark, bright Department 100. Its FFT: ① screen display picture f1 (m, n) and the FFT (f1) of the amplitude spectrum ② If so f2 (m, n) = (-1) m+n f1 (m, n), repeat The above process, comparing the amplitude spectrum of the similarities and differences between the two, brief reasons ③ If f2 (m, n) 90 degrees clockwise to get f3 (m, n), try to display FFT (f3) the amplitude spectrum and with the FFT (f2) comparing the amplitude spectrum ④ If f1 (m, n) obtained by 90 degrees clockwise f4 (m, n), so f5 (m, n) = f1 (m, n)+f4 (m, n ), try to display FFT (f5) amplitude spectrum, and pointed out its relationship with the FFT (f1) and FFT (f4) of ⑤ If so f6 (m, n) = f2 (m, n)+f3 (m, n) and try to display the FFT (f6) amplitude spectrum, and pointed out its relationship with the FFT (f2) and FFT (f3), comparing FFT (f6) and FFT (f5) amplitude spectrum.)

mppt_incc is incremental conductance

基于Matlab的非线性电路混沌实验仿真程序，通过对非线性电路（蔡氏电路）与非线性动力学进行分析，建立非线性动力学方程，然后利用Matlab/Simulink软件进行仿真，研究系统波形图、单吸引子、双吸引子、相面图以及在不同的非线性电阻的导纳下的不同形状(Matlab based nonlinear circuit simulation program and chaos, through the non-linear circuit (Chua) and nonlinear dynamics analysis, nonlinear dynamic equations, and then use the Matlab/Simulink simulation software to study the system waveform, single attractor, double attractor, physiognomy maps and different shapes in different nonlinear resistor admittance under)

costas 环路 simulink 仿真文件(costas loop simulation simulink file)

fdtd program 2D using PML (Perfect Match Layer)

这个是指纹识别的matlab程序，主要使用的方法是Gabor滤波器(matlab program of fingerprint recognition )

利用复自相关法求取混沌时间序列的时间延迟（tau），求取算法效率高且准确(Complex strike a chaotic time series autocorrelation time delay (tau), to strike a high efficiency of the algorithm and accurate)

MATLAB coding for 8 QAM is given

计算LDPC码理论性能的MATLAB程序,有例子说明,对通信系统设计很有帮助!(Calculation of theoretical performance of LDPC code MATLAB procedures have examples to illustrate the communication system design helpful!)