codes

先进PID控制matlab仿真，对PID的仿真有很大帮助，内含好多源代码(Advanced PID control matlab simulation , PID simulation , containing a lot of source code )

阵列超声阵列个数对D的影响，仿真图显示对比(array of ultrasonic array number of D simulation chart shows the contrast)

用内插实现定时功能。算法中有一些不足，但可以作为一个参考。(Using interpolation to achieve timing. Algorithm has some deficiencies, but can be used as a reference.)

对于常微分方程组，很难求得解析解，因此工程上常用数值解法，常微分方程组的R-K解法(For ordinary differential equations, analytical solution is difficult to obtain, so the numerical method used on the project, RK solution of ordinary differential equations )

这个是面部表情自动识别的源代码。它是基于Viola和Jones的面部检测算法和Gabor面部特征点的提取，然后使用训练过的神经网络来识别人脸表情。(This is the automatic recognition of facial expression source code. It is Viola and Jones face detection algorithms and Gabor facial feature point extraction, and then use the trained neural network based on facial expression recognition.)

直流-直流变换器的matlab仿真模块，实现了直流降压的功能。(Matlab simulation of the DC- DC converter module, the function of DC buck.)

灰色预测模型 肯定可以用，自己已经试过了(The gray predictive models certainly can be used, that they have tried)

some code related to convolution and quadratic equation solutions

高斯最小频移键控（gmsk）调制解调原理，(Gaussian Minimum Shift Keying (gmsk) modulation and demodulation principle,)

pcm编码，pcm编码pcm编码pcm编码pcm编码pcm编码pcm编码(pcm coding, pcm encoder pcm encoder pcm encoder pcm encoder pcm encoder pcm encoder)