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code about fdtd gooood5

一个BP神经网络的matlab程序 (A BP neural network matlab program)

matlab百例，一百个matlab绘图相关程序，有助于掌握Matlab绘图技巧。(matlab hundred cases, a hundred matlab drawing procedures to help master the skills of Matlab graphics.)

关于锁相环路的相关仿真，描绘的是一阶锁相环，二阶及三阶的各个特性。(PLL simulation, depicted is a first-order phase-locked loop, the second-order and third-order characteristics.)

说明：  LDPC码的比特翻转译码算法，其中包含一些可用的码字，EG-LDPC码和PEG构造的码字。(The bit flipping algorithm for LDPC codes.)

先定义蔡氏方程，再利用ode45画出蔡氏方程的分岔图(we give the equation of chua,then use ode45 function to solve and plot the bifurcation diagram.)

I have uploaded a code for DCT watermarking..I have embed a basic matrix into original image and calculated the difference.

通过使用matlab优化工具箱中的函数fmincon解决有约束的非线性优化问题，有详细的代码过程。(By using the matlab optimization toolbox function fmincon to solve constrained nonlinear optimization problem, has detailed the process code.)

In this code I have used GA in supervised PCA to find the best coeficients for overall covariance. the classification is made by KNN

说明：  在遗传算法中加入平滑路径，经可视化处理，能够在有障碍物的地图中快速寻求最佳路径。(By adding smooth path to genetic algorithm and visual processing, the best path can be quickly found in the map with obstacles.)