PID

一本描述声音信号处理的书，包括matlab的仿真过程(It s very good to descript on the signal processing including the step working on Matlab)

小波不同于传统的傅里叶变换和短时傅里叶变换，它具有随信号频率变化的时间频率分析能力，因此可以用来去噪！(This program implement the function of the interference of the noise！)

设r是f(x) = 0的根，选取x0作为r初始近似值，过点（x0,f(x0)）做曲线y = f(x)的切线L，L的方程为y = f(x0)+f (x0)(x-x0)，求出L与x轴交点的横坐标 x1 = x0-f(x0)/f (x0)，称x1为r的一次近似值。过点（x1,f(x1)）做曲线y = f(x)的切线，并求该切线与x轴交点的横坐标 x2 = x1-f(x1)/f (x1)，称x2为r的二次近似值。重复以上过程，得r的近似值序列，其中x(n+1)=x(n)－f(x(n))/f (x(n))，称为r的n+1次近似值(Let r is f (x) = 0 root, select the initial approximation x0 as the r, over point (x0, f (x0)) to do the curve y = f (x) the tangent L, L the equation y = f ( x0)+ f ' (x0) (x-x0), find the intersection of L and the x-axis of abscissa x1 = x0-f (x0)/f' (x0), x1 is called an approximation r. Through points (x1, f (x1)) to do the curve y = f (x) the tangent, and find the intersection of the tangent with the x-axis of abscissa x2 = x1-f (x1)/f ' (x1), x2 is called r the second approximation. Repeat the process, get an approximation of the sequence r, where x (n+1) = x (n)-f (x (n))/f ' (x (n)), as an approximation of r n+1 times)

K-means algorithm It is useful for clustering sample data

Boost converter used in power electronics is used to boost the output voltage

prony numerical method

用matlab实现机器学习中的两个经典算法：k-means和knn。(Using matlab to achieve in two classic machine learning algorithms: k-means and knn.)

信道化接收发射机设计，很好用。供大家一起研究学习。(Channelized receiver transmitter design, easy to use. Research for everyone to learn.)

matlab应用源程序，只能采集，网络连接(matlab application source code, can collect)

自己写的MATLAB程序，用于已知2个单位向量，求它们的旋转矩阵。非迭代法。 另有一个绝对定向程序。(Write their own MATLAB for 2 unit vector, known for their rotation matrix. The iterative method. There is another absolute orientation program.)