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学习simulink仿真的基础材料，适合初学者学习(Simulink simulation based learning materials, suitable for beginners to learn)

说明：  计算一个方柱的散射的波形，并求其RCS。方柱的网格总数是N=500个，时间步为1200步。网格尺寸为lamda/18,时间间隔是ddx/2*c，c为光速。脉冲源位于中心。方柱边长为7*lamda。并与相同尺度的球的散射场进行对比(Calculate the scattered waveform of a square column and find its RCS. The total number of grids of the square column is N=500 and the time step is 1200 steps. The grid size is lamda/18, the time interval is ddx/2*c, and c is the speed of light. The pulse source is at the center. The side of the square column is 7*lamda. And compare the scattering field of the ball of the same scale)

蚁群算法优化PID参数，运行myyiqun.m文件，修改数学模型在TEST文件中(Ant colony optimization algorithm PID parameters, run myyiqun.m file, modify the mathematical model TEST file)

说明：  董霖编著《matlab使用详解》程序源文件(董霖edited &quot matlab explain the use of&quot source documents)

这是一个矩形梁的有限元程序，用matlab来编的，可以作为初学有限元程序的人学习(this is a finite element program,it was compiled by matlab.)

时域有限差分法-2维自由空间传输电磁场分布(Finite Difference Beam Propagation Method)

多个尺度连续小波变换的实现。其中构造墨西哥帽子小波函数(1-D continuous wavelet transform code.)

扩散系统之浓度分布的装置。管中储放静止液体B，高度为L=10 ㎝，放置于充满A 气体的 环境中。假设与B 液体接触面之浓度为3 C 0 0.01mol m A = ，且此浓度不随时间改变 而改变，即在操作时间内( h = 10天)维持定值。气体A 在液体B 中之扩散系数为 D m s AB = 2×10− 9 2 。试决定以下两种情况下，气体A溶于液体B中之流通量(flux)。 (a) A 与B 不发生反应； (b) A 与B 发生以下之反应 A+ B→C ， A A − r = kC 其反应速率常数k = 2×10− 7 s− 1。 (Diffusion system of concentration reference device shown in Figure 3. Tube in the store still liquid B, L = 10 cm height, placed in full A gas environment. Assuming the contact surface of the liquid with the B concentration of 3 C 0 0.01mol m A =, and this concentration does not change with time and change, that is, the operating time (h = 10 days) to maintain constant. Gas A in liquid B, the diffusion coefficient D ms AB = 2 × 10-9 2. Decided the following two test cases, the gas dissolved in liquid B in the A liquid (flux). (A) A and B do not react (b) A and B of the following reaction occurs A+ B → C, AA- r = kC, the reaction rate constant k = 2 × 10-7 s-1.)

说明：  高等光学仿真（matlab版）-光波导、激光书中部分程序(Higher optical simulation (matlab)- waveguide, the laser part of the program in the book)

说明：  高斯滤波器 matlab toolbox For GMMs and Gaussian kernels(Gaussian filter matlab toolboxFor GMMs and Gaussian kernels)