MATLAB

粗糙集理论的知识约简Matlab源程序，我感觉是十分好的约见程序！！(Rough set theory, knowledge reduction of Matlab source code, I feel is very good appointment procedure!! )

figure imagesc(Img,[0 255]) colormap(gray) hold on bw = roipoly phi = 2*(0.5-bw) tic for n = 1:200 phi = Evo_ILF_2D(phi,mu,lambda,epsilon,timestep,Img_lap) pause(0.05) imagesc(Img, [0, 255]) colormap(gray) hold on [c,h] = contour(phi,[0 0], b ) iterNum=[num2str(n), iterations ] title(iterNum) hold off

对简单闭环系统的PID控制参数进行优化，得到最佳的控制效果。使用时将该文件夹设为matlab默认文件夹，用simulink打开.mdl文件，在命令行窗口输入.txt文档中命令，可以得到优化后的P、I和D参数。(The PID control parameters of the simple closed-loop system are optimized to obtain the best control effect. With using these codes, the folder must be set as the default folder of matlab, then open the. MDL file, and input the commands of . TXT document in the command line window. The optimized P, I and D parameters will be obtained.)

此函数产生超宽带信道的冲激响应 其中的主要参数有，TMG--仿真距离下平均总多径增益，fc--抽样频率值 hf--离散时间冲激响应 OT--用户可以选择的观测时间，ts--时间分辨率，LAMBDA--簇到达速率，lambda--簇内脉冲到达速率 GAMMA--簇衰减因子，gamma--簇内脉冲衰减因子，sigma1--簇衰落的标准方差，sigma2--簇内脉冲幅度衰落的标准方差 sigmax--总多径增益的对数的标准差，rdt--用户可以选择的参数，用于限制每簇内多径分量的产生 PT--用于限制信道冲激响应中多径分量的个数 第一步 设置表征信道冲激响应的基本参数(this program is used to generate the channel impulse response for the ultra wideband communication systems.)

用Matlab编写的功率谱估计，输入数据是100年太阳黑子活动记录，用周期图法、最大熵值估计（AR法及Burg法），画出信号功率谱进而算出太阳黑子活动周期。(Matlab prepared using power spectrum estimation, input data is 100-year record of sunspot activity, using periodogram method, the estimated value of maximum entropy (AR Law and Burg method), draw the signal power spectrum and then calculate the sunspot activity cycle.)

说明：  GAOT工具箱改进，包括主程序ga，种群生成，算术交叉，非均匀变异。(Improve GAOT，includes ga.m，initializega,arithXover,nonUnifMutation)

本程序采用自相关法求混沌时间序列重构的时间延迟。(This procedure using the autocorrelation method for chaotic time series reconstruction time delay.)

传输矩阵法计算啁啾光栅反射谱 本节中给出传输矩阵法计算啁啾光栅反射谱和 时延的完整M at lab 程序实例, 本段代码在 M at lab513 和W indow s2000 环境中运行通过。运行结果如图8 所示。可以改变光栅长度、有效折射率、折射率调制深度、啁啾系数等参数来获得不同参数下光栅反射谱和时延曲线。如果打开“％ 切趾”行的屏蔽符“％ ”则可得到切趾后光栅反射谱和时延特性曲线, 此时计算所得的曲线将比图8 中所示的曲线平滑很多。(Transfer matrix method to calculate reflection spectrum of chirped grating is given in this section transfer matrix method to calculate chirped grating reflection spectrum and the delay of a complete example of M at lab procedures, the above code in M at lab513 and W indow s2000 environment to run through. The results shown in Figure 8. Can change the grating length, the effective refractive index, refractive index modulation depth and chirp coefficient parameters to obtain different parameters of grating reflection spectrum and the time delay curve. If you open Apodization line shielding Fu can be grating after apodization reflection spectrum and the delay characteristic curve, the curve at this time will be calculated as shown in Figure 8 a lot of curve smoothing.)

说明：  本程序主要是用Matlab进行编写的关于bermark函数的遗传优化算法(matlab)

这是一种折线逼近算法，主要被用来拟合直线。(polygonal Approximation used to fit line segment )