reconstruction

说明：  fourier 变换与MATLAB实现 张德丰(fourier transform and MATLAB implementation Zhang Defeng)

主成分分析是把原来多个变量划为少数几个综合指标的一种统计分析方法。 从数学角度来看，这是一种降维处理技术。(Principal component analysis (PCA) is a statistical analysis method that divides a number of variables into a few comprehensive indexes.From a mathematical point of view, this is a kind of dimensionality reduction technology.)

基于matlab的画出一个不完整的椭圆，结果完美。只要稍作修改可以出来任意要求范围的不完整椭圆。(Matlab to draw the ellipse )

video scence recognition tool in matlab

Matlab与数字通信系统仿真.ppt (Matlab and digital communication system simulation. Ppt)

里面有数字信号处理中常用的matlab工具，用的时候查看该文档，方便Matlab在数字信号处理中的使用(Inside there are commonly used in digital signal processing matlab tool, with the time to view the document in Matlab to facilitate the use of digital signal processing)

About sift algorithm

EMD程序用于分解非线性非稳定性的曲线，对数据进行分解成本征模态函数，(The empirical mode decomposition and the Hilbert spectrum for nonlinear and non-stationary time series analysis)

这个是用来计算白噪声测试的，特别适用于振动台试验。编程简单，测试也比较符合预测值。(This is used to calculate white noise, especially for shaking table test. The programming is simple and the test is more consistent with the predicted value.)

demonstrates the forward difference method