add_noisem

matlab画史密斯圆图的程序，可以画出基本的圆图，方便使用(this is a code file of drawing Smith Chart by Matlab, a basic chart can be drawn and it s fit for use.)

Hilbert-huang极值和zero-crossing(Hilbert-huang extr和zero-crossing)

dct algorithm watermark

newmark方法求解非线性振动duffing方程(newmark method for solving nonlinear vibration duffing equations)

说明：  VMD是通过迭代搜寻变分模型（具体怎么搜寻，请亲们自己看，我主要讲他的大概）最优解， 来确定我们所知的模态uk(t)及其对应的中心频率ωk和带宽。 每个模态都是具有中心频率的有限带宽（就是在频域中有在一定的宽度）。所有模态之和为源信号。(VMD is to determine the modal UK (t) and its corresponding central frequency, k and bandwidth by iteratively searching for the optimal solution of the variational model (see dear friends for details, and I will mainly talk about his approximate solution). Each mode is a finite bandwidth with a central frequency (that is, a certain width in the frequency domain).The sum of all modes is the source signal.)

用matlab写的很好的关于二进制转十进制的函数代码，可以实现非整数二进制转换十进制，以及负二进制转换十进制(Using matlab to write on the good function of the binary code to decimal, you can achieve non-integer binary decimal conversion, as well as the negative decimal binary conversion)

filtering and restoration in frequency domain

MATLAB从入门到精通，介绍得很详细很具体(MATLAB Mastering )

matlab仿真的GPS信号捕获程序，相关及非相关累积算法(matlab simulation of the GPS signal acquisition process, relevant and non-related accumulation algorithm)

永磁同步电机的simulink仿真，V/f控制模式，带电流反馈(PMSM model in matlab/simulink with V/f control mode.)