mydct_good

matlap for the function

that about penduliam

　　车辆监测用测速雷达是依据多普勒效应原理实现的。由雷达发出一束微波，遇被测目标（车辆）时微波被反射回来，再由雷达接收反射波。如果目标相对于雷达有距离上的运动，反射波的频率将与发射频率发生差异，而这种差异的大小正比于目标与雷达的相对运动速度。于是，雷达通过检测反射波频率和发射波频率的差，就可以计算出被测车辆的移动速度。本次课程设计是利用离散付里叶变换进行频谱分析，设计数字滤波器组，并对滤波器组加窗降低副瓣，通过频域方法测量速度。(Vehicle monitoring using radar gun is based on the realization of the principle of the Doppler effect. By the radar emits a microwave, in case the measured target (vehicle) when the microwave is reflected back, and then by receiving the reflected radar waves. If the target relative to the radar on a distance of motion, the frequency of the reflected wave and the emission frequency of the difference, and this difference is proportional to the relative target and radar velocity. Thus, by detecting the reflected radar wave frequency and the frequency difference between the transmitted wave, we can calculate the movement speed of the vehicle under test. This course is designed to take advantage of the discrete Fourier transform spectral analysis, digital filter design group, and filter bank windowed lower sidelobes by frequency domain methods to measure speed.)

Jacobi 方法，利用平面旋转矩阵所构成的正交相似变换将对 对称矩阵化为对角型的方法(Jacobi method, the use of planar rotation matrix by orthogonal similarity transformation consisting of the symmetric matrix into a diagonal-based method)

MATLAB小波分析高级技术中的基于小波变换域的数字水印MATLAB源代码。(High MATLAB wavelet analysis technique based on the wavelet transform domain digital watermarking MATLAB source of generation code.)

根据csdn版主VC和matlab混编的文章，写成的VC调用matlab生成的动态函数库显示图片。(vc function calls matlab s function )

说明：  计算行星齿轮的固有频率，来分析其共振现象，刚度矩阵(Calculate the natural frequency of planetary gear to analyze its resonance phenomenon and stiffness matrix)

用matlab对一组向量进行排序和解决了行排序后，列随行走的问题。(Using matlab to sort a set of vector and resolution after the trip to sort out the problems with walking.)

小波包分析提取振动信号中的特征频率，可以广泛的应用于数据预测及数据分析,混沌的判断指标Lyapunov指数计算。( Wavelet packet analysis to extract vibration signal characteristic frequency, Can be widely used in data analysis and forecast data, Chaos indicator for Lyapunov index calculation.)

经典的Extended-Euclid算法，计算GCD。。。(implement Extended-Euclid)