stft2

本程序用于森林视频监控中天地分界线的确定，确定后对于天地线上方部分都认为是天空不进行处理，可提高视频处理效率和系统的性能。(The procedure for forest video surveillance to determine the boundary between heaven and earth. The part above the line side is considered as sky, do nothing to which. It can improve the video processing efficiency and system performance.)

说明：  子波模拟的程序，对于用信号处理方法处理勘探地震信号的同学们有一些帮助(Sub-wave simulation of the process, with the signal processing method for exploration seismic signal processing students have some help)

最速下降法又称为梯度法，是1847 年由著名数学家Cauchy 给出的，它是解析法中最古老的一种，其他解析方法或是它的变形，或是受它的启发而得到的，因此它是最优化方法的基础。这里给出其Matlab源程序。(The steepest descent method, also known as gradient method, was in 1847 given by the famous mathematician Cauchy, it is the oldest analytical method one, other analytical method or its variants, or inspired by it obtained and therefore it is the basis for the optimization method. Here are its Matlab source.)

一个剪切波变化工具箱，里边程序很全，有范例，值得拥有(A shear wave change toolbox, inside the program is full, there are examples worth having)

在视图中使用CWindowDC在整个窗口进行绘图，C++精选学习源码，很好的参考资料。(For drawing in the window using CWindowDC in the view, select learning C++ source code, a good reference.)

利用MATLAB GUI做的三维数据自动绘图程序，安装运行库后可自动运行，实现从EXCEL读取数据并自动绘制三维曲面图的功能(Using three-dimensional data in MATLAB GUI to do automatic drawing program, after installation of runtime to run automatically read data from a EXCEL and automatically draw the three-dimensional surface map features)

说明：  M AT L A B拥有大量简单、灵活、易用的二维和三维图形绘图命令,本教程用于学习MATLAB 绘图。(M AT LAB has a large number of simple, flexible, easy to use two-dimensional and three-dimensional graphics drawing commands, the tutorial for learning MATLAB graphics.)

西门子 s7-200 samples，包括循环、中断、转换、计时器。表指令等。(Siemens s7-200 samples, including loops, interruption, conversion, timer. Table directives.)

四步相移法测量圆柱横截面形貌,主要利用四步相移法求相位的模拟实验(Four-step phase shift method to measure the cylindrical cross-section morphology, the main use of the four-step phase shift method for the simulation phase)

描述几种常见的变步长算法，步长因子与误差之间关系的曲线。(This paper describes several common variable step size algorithms, the curves of the relationship between the step factor and the error.)