dvrthreelevel

此代码为《无网格法》书籍的Matlab源码，作者是张雄。(This code is "meshless method" Matlab source books, the author is Zhang Xiong.)

FDTD的并行算法，有一定参考价值，具体描述可见《电磁兼容问题的计算机模拟与仿真技术》一书。(FDTD parallel algorithm has a certain reference value, the specific description can be seen, )

说明：  声 线 跟 踪 计 算 程 序，raytrace,

LMS算法程序表述其算法机制同时给出图样(LMS algorithm program)

eof分解用的函数，说明如下：function [EOF,PC,F,diff]=EOFcgx(X) EOF分解。Xm*n 空间数据维数m，n为时间采样点 返回值EOF为空间模态,PC为时间模态。第一空间模态EOF(:,1),第一时间模态PC(1,:) 返回值F为特征值，diff为误差 (eof decomposition function as follows: function [EOF, PC, F, diff] = EOFcgx (X) EOF decomposition. Xm* n spatial dimension m, n is the time of sampling points Returns the value EOF spatial modes, PC is the time modes. The first space modal EOF (:, 1), the first time the modal PC (1, :) Return value F for eigenvalues, diff for error )

用rayleighchan 函数仿真时要注意最后要做相位补偿（此问题是导师发现的） 程序步骤： ~产生随机序列 ~产生瑞利信道 ~调制 ~记忆信道特征 ~信号通过信道 ~相位补偿 ~加高斯噪声 ~解调 ~计算仿真误比特率 ~计算理论误比特率 ~不同颜色画出误比特率曲线对比(Function Simulation with rayleighchan last thing to note when the phase compensation (this issue is found mentor) program steps: ~ ~ generated random sequence modulation in Rayleigh Road, ~ ~ ~ memory characteristics of the signal channel by channel ~ ~ plus Gaussian noise phase compensation ~ ~ demodulation bit error rate calculation simulation of bit error rate calculation theory ~ ~ different colors to draw curves of bit error rate)

以矿山管理为例子解决离散时间和离散状态的动态模型。(solving the discret time,discret state dynamic models in economics.)

简单的将线性调频信号的时域图和频域图对比描述，帮助读者更加直观的看出线性调频信号的特征(Simple time domain and frequency domain plots in Figure chirp signal contrast description to help readers see more intuitive chirp signal characteristics)

this document describe the development of design of camera lens.

It is Simulink model for Double-sideband transmitter.