pulse_signal_simulation

说明：  pca程序,一个主分量分析程序,用于提取特征直,欢迎大家下载(PCA procedures, a principal component analysis procedures for the extraction of straight and you are welcome to download!)

Archivo para aprender a hacer placas impresas

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说明：  基于MATLAB软件，使用者在交互界面GUI上输入入射介质、反射介质的折射系数n1、n2，可算得不同入射角条件下线偏光/自然光的菲涅尔透反射系数及透反射比(Based on the MATLAB software, the user can input the refraction coefficients N1 and N2 of the incident medium and the reflecting medium on the GUI of the interactive interface, and calculate the Fresnel transmittance and reflectance of the line polarized light / natural light under different incident angle conditions)

超多CSS Div圆角特效代码集，有DIV圆角，圆角菜单、圆角列表、圆角混合布局、圆角图片边框等，一共有10款圆角框效果，全部兼容ie8、火狐或Chrome浏览器，没有用到CSS3，传统CSS技术实现，是学习CSS的好资料。

背景 背景 背景 背景 背景 背景

说明：  初学者学习Fortran的课件，蛮有用的(Fortran for beginners learning courseware, giving a pleasing use)

利用VB制作的一款游戏，很好玩，试试你能打多少分.-VB produced a game that is a lot of fun, try and shoot you how many points.

说明：  简易实现图片验证功能，如需复杂验证，请记录鼠标拖动轨迹，后端实现分析，具体有兴趣的朋友可以试试。(Simple implementation of image verification function, if complex verification is required, please record the mouse drag track, back-end analysis, specific interested friends can try.)

在一大串字符串中查找某一个字符或者字符串出现的次数.并且返回次数.-string in a string search for a character string or the number of occurrences. And the number of returnees.