PM_1

从经典功率谱估计周期图法原理入手，从理论上分析了其存在的局限性，借助Welch算法对其进行修正。依靠Matlab强大的数值分析和信号处理能力，进行实验仿真，比较不同的窗函数，不同的数据长度对Welch法谱估计质量的影响，并分析了造成这些影响的原因。(The paper mainly introduces the principles of Periodogram method of classical PSD estimation,analyzes the deficiency of Periodogram method in theory,and makes use of Welch to amend Perodogram method. By the use of simulation in Matlab, the impacts of different window function and different lenghth of data on estimation quality of Welch are discussed and the reasons of the impacts are analyzed.)

a tutorial for simulink on matlab

openExcel :用Matlab打开启动Excel服务器，并返回Excel活动页的句柄H jitt : 利用传入的周期向量，计算频率抖动 norma : 把计算得到的向量平均采样为30个点 interest ： 复利计算方法 myvad : 通常vad算法只能得到汉语普通话一声、二声和四声的语音，对于三声，中间因为有嘎裂，就是突然基频变得很低并且不规则，vad算法把一个音节往往切分为两个音节，myvad解决普通话三声的问题 (Open Excel sever by Matlab, and returen a handle of Excel active sheet)

MATLAB 智能语言文档 从零开始学软件 (Intelligent document MATLAB language learning software from scratch)

对于学习信号处理的同学们，需要数值分析的一些知识，如拟合、松弛迭代等等都是有用的数值分析方法(For students studying signal processing, numerical analysis requires some knowledge of relaxation that a useful method for numerical analysis)

说明：  本程序为利用matlab求解微分方程的源程序及相关例子。(the procedures for the use of Matlab to solve the differential equation of the source and relevant examples.)

大地测量学原理坐标转换程序，能实现大地坐标到平面的互相转换(The geodetic coordinate conversion program principle, can realize the earth coordinate to plane conversion to each other )

读取信号进行时频分析，wigner时频图和fft频谱图(When reading the signal frequency analysis, time-frequency diagram and fft spectrum wigner)

系统辨识的作业，是自己写的，有需要的可以参考参考(System identification of the work is your own writing, there is a need that can refer to reference)

mit（csail）上的matlab程序，里面的c++程序需要mex编译，算法可参考下面这篇论文(SIFT flow: dense correspondence across difference scenes ECCV2008)