position servo system design. Spent two weeks designing the system.

在电子技术中，频率是最基本的参数之一，又与许多电参量的测量方案、测量结果都有十分密切的关系，因此频率的测量就显得更为重要。测量频率的方法有多种,其中电子计数器测量频率具有精度高、使用方便、测量迅速，以及便于实现测量过程自动化等优点，是频率测量的重要手段之一。在本次毕业设计中我们选择使用单片机来制作数字频率计，并在实际制作中采用了直接测频法。利用延时产生的时基门控信号来控制闸门，通过在单位时间内计数器记录下的脉冲个数计算出输入信号的频率，最终送入LCD中显示。这样制作出来的频率计不仅可以满足设计题目的参数要求，而且具有了单片机的稳定性和成熟性，且控制能力强，是一种低成本，高可靠的设计方案。-In electronic technology, the frequency is one of the most basic parameters, but also with a number of electrical parameters of the measurement program, the measurement results have a very close relationship between the frequency of measurement, therefore it is even more important. Measurement of the frequency of a number of means, electronic measurement of the frequency counter with high precision, easy to use, rapid measurement, and measurement is easy to realize the advantages of process automation is an important means of measuring the frequency of one. Graduates in this design we have chosen to make use of single-chip digital frequency meter, and used in the actual production of a direct

详细介绍4种实时操作系统实时性的分析对比.-Introduce four kinds of detailed real-time operating system real-time analysis and comparison.

一个电力网站的需求说明书，可以作为模版使用-a website electricity demand brochures can be used as templates

基础知识；利用自己所学的知识设计一个可以实现匿名的网络系统，通过此系统发邮件可以不让对方知道你的IP地址，从而保证了系统的安全性！-basic knowledge; Use their knowledge has been a design can achieve anonymous network system through the mail system does not allow the other side to know your IP address, thereby ensuring the safety of the system!

TMS320F240在有功功率变换器．测量等方面的应用科技文档及源码，来之不易，与大家共享．-TMS320F240 in the active power converter. The application of measurement science and technology documents and source code, does not come easily, and everyone shared.

自己的 vc++笔记 希望对你有用-their vc Notes hope useful to you

一个基于OGRE图形引擎的高度面向对象的游戏结构-an OGRE graphics engine based on the height of the object-oriented structure of the game

数据库课程设计 碟片出租系统 -Database Course Design Disc Rental System

PayPal支付平台的接口编程文档。PayPal是目前国际电子支付中最常用的平台，如果你开发电子商务网站需要解决国际支付问题，便可以使用该平台。本文档说明了如何将PayPal支付平台集成到你的电子商务网站中。-PayPal payment platform programming interface documentation. PayPal is an international electronic payment in the most commonly used platform for the development of e-commerce site if you need to address the issue of international payments, they can use the platform. This document explains how to integrate PayPal payment platform to your e-commerce site.

绍G.729编解码原理，及在TMS320C541定点芯片上实现的关键技术-Principle Shaozeng G.729 codec, and fixed-point chip TMS320C541 key technologies