一个oa 分析，比较全面，有很好的参考价值

在数控机床中, 通常用可编程控制器( PLC) 对机床开关量信号进行控制。PLC可靠性高, 使用方便。但在大多数数控机床, 特别是经济型数控机床中, 要求的输入输出点数并不多, 通常在60点以下,因此, 为了降低数控机床成本, 在基于工业PC机的数控系统中, 可以采用开关量I/O板加外接继电器,配合主机的软件对机床开关进行控制。但如果PC机采用单任务操作系统(如DOS) , 数控系统的所有任务运行都置于一个总体的消息循环中, 软件的模块化和可维护性较差, 系统故障的风险相对集中, 而且不能充分利用PC机系统资源。而采用非实时多任务操作系统(如Windows) 时, Win32 API的设计没有考虑到实时环境的开发用途, 其系统调用的效率不高,不能满足数控系统PLC控制的实时性要求。 　　为此, 本文提出一种基于RT - Linux操作系统的嵌入式PLC, 利用RT - Linux的开放性、模块化和可扩展性的系统结构特性和多线程/多任务的系统环境,在保证实时性的同时, 使故障风险相对分散。 -use linux to design plc

电阻炉温度控制系统 原理图 实验方案等 测试通过-Resistance furnace temperature control system schematic experimental test programs

图书管理 1.将各个项目子目录拷贝到硬盘上，然后可以用Visual Basic打开程序。 2.在每个项目子目录里面的sql目录里，将后缀.sql的文件打开后，拷贝到SQL Server 2000的查询分析器里。然后执行将产生需要的数据库结构。-management of a library. All projects will subdirectory copy to the hard drive, which can then be opened in Visual Basic procedures. 2. Each item inside the subdirectory sql directory of extensions. Sql open the document, copies of SQL Server 2000 inquiries analyzer Lane. Then needs arising from the implementation of the database structure.

A MATLAB-based implementation of an OFDM modem has been developed for use over an acoustic channel, modem. With full lists of coding. -A MATLAB-based implementation of an OFDM modem has been developed for use over an acoustic channel, modem.With full lists of coding.

易网OA办公自动化系统是在总结了大量行政和企事业对日常办公，工作监控，以及领导辅助决策需求的基础上，以现代管理理论为指导，结合先进的管理理念而抽象出通用模型，基于业界领先的Lotus Domino/Notes R5,R6群件平台自主开发的软件产品。-easy network OA system is summed up in a lot of administrative and routine office enterprises, control and decision support needs leadership on the basis of modern management theory as a guide, combining advanced management ideas and abstract universal model, based on the industry-leading Lotus Domino/Notes R5, R6 groupware platform independent development of software products.

学习掌握FAT 32 文件系统的必备资料，让你轻松掌握。-FAT 32 file system to learn to master the essential information to enable you to easily grasp.

用JAVA来实现计算机的网络设计 -Using JAVA to achieve computer network design

pci中文规范... 有需要的兄弟可以下载-pci Chinese ... there is a need to standardize the brothers can be downloaded

AVS帧内预测算法及其解码器的硬件实现 文章介绍了AVS帧内预测解码模块的硬件实现，概述了AVS视频编解码标准的帧内预测技术，重点讨论了 AVS帧内预测各模式的算法．并将AVS的帧内预测技术与H、264的帧内预测技术进行了性能比较，分析了AVS帧内预 测的算法复杂度．在此基础上设计了AVS帧内预测解码模块的硬件实现，并提出了一种可重构的帧内预测计算单元的 实现方法。-AVS intra-prediction algorithm and its hardware decoder realize the article introduction AVS decoding intra prediction module hardware implementation, outlines the AVS video codec standards for intra-prediction technology, focused on the AVS intra mode prediction algorithms. AVS and the intra-prediction technology and H, 264 of the intra-prediction technology for performance comparison, analysis of the AVS intra-prediction algorithm complexity. On this basis the design of the AVS intra prediction hardware decoder module and a reconfigurable intra prediction method of calculating the unit realize.

运动控制仿真实验：双闭环直流调速资料，珍贵。-Motion Control Simulation: Double Loop DC Motor Control information valuable.