LAYER

将一张图片由直角坐标转换为极坐标，并且分别显示图片(the trans of coordination)

To investigate the effects of the discrete Fourier transform parameters on the frequency spectra of discrete-time signals. (Display x(n) on the screen with the plot command in Matlab)

说明：  结构可靠性分析中的重要度抽样、蒙特卡洛仿真方法(importance sampling technique and Monte Carlo simulation in system structural reliability analysis)

设计弹出菜单利用 Visual basic 6.0 开发工具实现(Visual basic 6.0 )

It has m files. These m files will run in matlab. Different kinds of table can be drawn by these m files

说明：  基于matlab的直接序列扩频系统抗干扰性能仿真(Simulation of Anti-jamming Performance of Direct Sequence Spread Spectrum Communication System Based on MATLAB)

ADRC主要资料，包含ADRC核心文章，韩京清教授的“从PID到ADRC”的中文翻译。(ADRC information, including the ADRC-core, Professor Han Jingqing " from PID to ADRC" Chinese translation.)

matlab 有限元结构动力学与工程应用 第二章(The second chapter of the matlab finite element structural dynamics and engineering applications)

1．通过实验加深对快速傅立叶变换（FFT）基本原理的理解。 2．了解FFT点数与频谱分辨率的关系，以及两种加长序列FFT与原序列FFT的关系。 离散傅里叶变换（DFT）和卷积是信号处理中两个最基本也是最常用的运算，它们涉及到信号与系统的分析与综合这一广泛的信号处理领域。实际上卷积与DFT之间有着互通的联系：卷积可化为DFT来实现，其它的许多算法，如相关、滤波和谱估计等都可化为DFT来实现，DFT也可化为卷积来实现。(1. Deepen the experimental fast Fourier transform (FFT) the basic tenets of understanding. 2. Understand the FFT spectrum and points of the resolution, and two extended sequence with the original FFT FFT relations. Discrete Fourier Transform (DFT) and the convolution of two signal processing is the most commonly used basic arithmetic, they relate to the signal and system analysis and synthesis of the wide range of signal processing field. DFT actually convolution and interoperability between contact : DFT into convolution can be achieved in many other algorithms, If relevant, filtering and spectral estimation could be achieved as DFT, DFT into convolution can be achieved.)

此代码是计算两个数据之间的相关性的，直接调用Matlab里的功能函数(This code is to calculate the correlation between the two data directly call Matlab functions)