BER&SIC

一个有限长序列,用matlab实现其N=100的DFT。给出其幅度与相位曲线，并讨论其相关性质。 (A finite-length sequence, using matlab to achieve its N = 100 of the DFT. Given its magnitude and phase curves, and discuss their related properties.)

美赛大长河问题的进阶代码，从速度单一到速度不同到不同套餐下的速度(MCM the big long river)

A polyalphabetic cipher is any cipher based on substitution, using multiple substitution alphabets. The Vigenère cipher is probably the best-known example of a polyalphabetic cipher, though it is a simplified special case.Polyalphabetic substitution ciphers are useful because the are less easily broken by frequency analysis, however if an attacker knows for instance that the message has a period n, then he simply can individually frequency analyze each cipher alphabet. The number of letters encrypted before a polyalphabetic substitution cipher returns to its first cipher alphabet is called its period. The larger the period, the stronger the cipher. Of course, this method of encryption is certainly not secure by any definition and should not be applied to any real-life scenarios.

matlab实例clearN=100f=zeros(50,50) f(15:35,23:28)=1 figure(1)imshow(f, notruesize )F=fft2(f,N,N) F2=fftshift(abs(F)) figure(2)x=1:N y=1:N mesh(x,y,F2(x,y)) colormap(gray) colorbar(matlab)

MATLAB图形处理教程资料MATLAB graphics tutorial information(MATLAB graphics tutorial information MATLAB graphics tutorial information)

说明：  基于matlab的天线散射程序，计算其表面的感应电流 很实用的(Antenna scattering procedure based on matlab to calculate the surface of the induced current is very useful)

惯性导航轨迹生成器，用于生成惯性导航轨迹(INS trajectory generator, used to generate the inertial navigation path)

电力系统下微电网在MATLAB中的仿真建模，模型已经搭建好(Power system three-machine nine-node model, simulation based on module construction, simulink)

说明：  实体目标散射中心提取，并且能实现高进度的提取(Solid target scattering center extraction, and can achieve high progress extraction)

MATLAB kalman filter