electric-field

说明：  伽罗瓦域中2^8变换乘法逆运算的matlab程序(Galois field multiplication of 2 ^ 8 inverse transform of the matlab program)

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.)

一个很好的研究RS编译码的程序,包含了序列生成、编码、过信道、译码、错误分析等等~~~(one GOOD RS~~)

跳频信号的短时傅里叶变换时频分析，在脉冲噪声干扰下的拟制噪声处理，并进行参数估计分析效果。(Short-time Fourier transform of frequency hopping signal time-frequency analysis, artificial noise under pulse noise processing, and analysis of parameter estimation results.)

matlab入门书籍，介绍了matlab的主要函数命令。包括入门知识、数值计算功能、图形可视化处理功能、notebook、程序设计等等(matlab entry books, describes the main function of matlab commands. Include the entry of knowledge, numerical computing, graphics, visual processing, notebook, programming, etc.)

matlab 使用基本的命令介绍，包含许多基本的命令(matlab introduce some information about how to use it )

第4个：matlab 和C++联合用于SVM，另外一种风格的(the 4 file: matlab and c++ together for SVM)

3 triangular connected buses system, solving the load flow using Newton Raphson.

说明：  使用matlab软件进行程序设计中的五个数据挖掘源程序代码。(Using matlab software programming for the five data mining source code.)

说明：  小波变换 (matlab的小波变换 )