svd

reduction of a symmetric matrix to symmetric tridiagonal form

　　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.)

一个MATLAB/Simulink模型，关于电动汽车动力电池荷电状态（State of Charge，SOC）估计； 包括参数文件、模型文件两种，模型文件分别仿真了110A恒流、110A脉冲和ECE15工况； 建模采用基于PEGV的电池等效模型对SOC进行估计，并且加入了温度修正等。 模型比较简单，原理清楚，适合对电动汽车动力电池SOC的估计有兴趣的初学者参考学习，学习前请阅读2到3篇基于电池PNGV等效电池模型的动力电池SOC估计方面论文，这样对理解模型更有帮助。(A MATLAB/Simulink model, on the electric vehicle power battery State of Charge, SOC estimates Including the parameter file and the model file, the model file simulates 110A constant current, 110A pulse and ECE15 working condition respectively. The SOC model was used to estimate the SOC and the temperature correction was added. The model is relatively simple, the principle is clear, suitable for beginners interested in electric vehicle power battery SOC estimation, it will be better to read 2 to 3 SOC estimation papers about battery PNGV equivalent battery.)

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在理想环境下对ofdm进行仿真，有qpsk映射，ifft，d/a的转换，和接受等(In an ideal environment for simulation of ofdm, there qpsk mapping, ifft, d/a conversion, and acceptance of such)

扩展空间信道模型的matlab仿真 (MATLAB implementation of the extended SCM channel model)

ofdm在matlab上的仿真程序，并且是可视化的matlab程序(ofdm simulation)

这个程序的主要功能是用来提取特征。其中有分帧算法，并提取MFCC参数作为特征。(The program' s main function is to extract features. Partakers of which the frame algorithm, and extract the MFCC as feature parameters.)

this code helps you to calculate the autospcter (autospecter_code)

关于中性点接地的MATLAB仿真模型的搭建，效果还可以(About neutral grounding of MATLAB simulation model construction, the effect can be)