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该matlab程序的作用是用于提取激光光斑中心(the matlab is used to find laser spot)

? 实现图书信息、类别、出版社等信息的管理； ? 实现读者信息、借阅证信息的管理； ? 实现图书的借阅、续借、归还管理； ? 实现超期罚款管理、收款管理； ? 创建触发器，分别实现借书和还书时自动更新图书信息的在册数量；(Realize the management of books information, categories, publishing houses and other information; Realize the management of reader information and borrowing card information. To realize the management of book borrowing, renewal and return; Achieve the management of overdue fines and receipts; Create triggers to automatically update the number of books in the book when borrowing and returning books, respectively.)

y注册表单是一款拥有三种不同风格的表单验证表单，可以有效验证字符串(The y registration form is a form validation form with three different styles, which can validate strings effectively.)

简介：功能描述：商品的分类显示、浏览商品、用户登录、选购和调整购物车、集中结算、存储订单、查看订单 -Introduction: Functional Description: Commodity classification shows, browse merchandise, users log in, choose and adjust the shopping cart, centralized billing, store orders, view orders

SPWM波产生，keil软件代码，C语言编写程序(SPWM Wave Generation, Keil Software Code, C Language Programming)

说明：  用ansys做的压电片的仿真，来显示压电陶瓷的电压(The voltage of piezoceramics is shown by using the simulation of piezoceramics made by ansys)

qpsk经典小程序，调通了的程序，欢迎大家下载哦-qpsk classic applets, tune talked procedures, welcome to download oh

矩阵的三角分解，ap指向a，bp指向下三角，cP指向上三角-Triangular matrix decomposition, ap point a, bp point lower triangular, cP point to upper triangular

说明：  基于51单片机的红外线解码，控制继电器的开关，从而控制灯等电气的开关，实现简单的红外线无线控制。(Infrared decoding based on 51 single-chip computer controls the switch of relay, so as to control the switch of electric lights and so on, so as to realize simple infrared wireless control.)

信号的抽样和恢复，若 是带限信号，带宽为 , 经采样后的频谱 就是将 的频谱 在频率轴上以采样频率 为间隔进行周期延拓。因此，当 时，不会发生频率混叠；而当 < 时将发生频率混叠。(The signal sampling and recovery)