Auto Hotkey在图书馆实时咨询工作中的应用

介绍了热键脚本语言Auto Hotkey,探讨了其在以腾讯QQ为工具的图书馆实时咨询中的应用。     

基于FPGA的小波低频信号提取的实现

讨论了小波变换的原理和特点,简化了离散小波变换,在FPGA上实现低频光电跟踪信号的提取。     

基于DTMB的无源雷达在车辆定位中的应用

无源雷达系统是基于机会照射源对目标进行定位、跟踪甚至识别的系统,这种雷达系统具有先进的系统架构与算法,应用前景十分广泛。本文提出一种基于地面数字电视广播信号的无源雷达用于车辆定位与跟踪的技术。首先分析DTMB （Digital Television Terrestrial Multimedia Broadcasting）信号作为非合作照射源的优势,提出了基于DTMB信号的无源雷达目标定位与跟踪的算法,然后通过构建试验平台,实地测量数据,利用MATLAB设计实时数据处理算法对移动车辆的运动状态进行定位与跟踪。实验结果表明,利用无源雷达进行移动车辆的定位与跟踪是完全可行的。     

Report on the conference “information technology: Impact on the way of life”

Expanding computer network technologies have emerged as a popular communication channel for millions of people. Contemporary literature abounds with ideologically biased accounts of on-line interaction that hinder the emergence of a coherent analytical framework. Scholarly work on computer-mediated communicative play remains underdeveloped. Through an empirically grounded theoretical orientation, this study aims to identify and illustrate processes and elements central to the emergence of self in on-line chat environments. By use of an e-mail survey, participant observation, content analysis, and open-ended interviews, the social nature of on-line interaction is illustrated and identified as significantly more than the technological sum of the medium. Findings indicate that through on-line chat-interaction a ''cyberself'' emerges, rooted in a unique form of communication that is disembodied, dislocated, anonymous, multiple-simultaneous, and faceless. Each of these elements introduces new possibilities to the dramatic nature of on-line interaction, which represents a kind of communication ''self-game'' where participants enact a multiplicity of selves.     

基于单片机的湿度控制系统设计

设计以STC89C52单片机核心来设计温湿度控制系统,分为两个部分,一个是上位机,另一个是下位机（单片机）。系统具有显示温湿度、设定温湿度上下限值并保存设定的上下限值的功能,且能自动控制环境的温湿度参数。     

DVD收音机实时操作系统的任务调度策略

实时操作系统已经被广泛应用于工业控制、网络以及家用电器等领域。任务调度策略是嵌入式实时操作系统的核心,实时操作系统的任务调度策略可分为优先级调度和时间片轮转调度两种方式。将DVD收音机的每个功能作为一个任务,采用非竞争机制的任务调度设计,可将整个运行周期控制在几毫秒之内,同时,也节省了内存,简化了资源的管理和分配。     

Real-Time Chat Reference and the Importance of Text-Chat

Summary

One of real-time chat reference's strengths is the options it gives the librarian in terms of answering questions. Librarians can use text chat, send over a Web page (push pages), or let a patron watch them work over their computers. Options come with a price, though-transaction speed. While most librarians work from a speedy connection, patrons chatting with them are probably using slower dial-up connections. Chat software features are expanding quicker than most patrons can handle, so now it's time to focus on how to best serve the most patrons, instead of inadvertently catering to a select group of technologically savvy patrons with fast computers. Text chat is an excellent way to make sure the most patrons get the best results from real-time reference chats.     

基于多任务版本的实时系统调度算法

本文介绍了多任务版本的实时系统调度算法.该算法能够满足实时系统中的关键性任务在最坏情况下运行时,仍可满足截止时闻的要求.通过为实时系统中的关键性任务设置两个任务版本,即主态和从态版本.主态任务版本具有较好的质量,从态任务版本只提供最基本的功能,运行时间较短.在最坏情况下避免调度主态任务版本,来满足实时调度的实时性要求.     

CCD相机的数据采集与实时处理

通过对CCD光电图像传感器原理的认识,结合单片机,数据采集技术,数字图像分析与处理,实现相机的自动调节和数据的实时处理。研究设计了一种基本的图像采集系统,可以为各种信号的采集和处理提供基本模块,且使用了通用的51单片机实现控制功能。     

组态软件实时数据库系统研究及设计

利用Windows的DLL(动态连接库)和全局共享内存技术来建立系统实时数据库的设计思想,采取传统数据库系统、文件系统和内存数据库系统兼用,利用多种存储介质来构造系统的实时数据库系统,并通过给用户提供一套接口标准——实时数据库系统接口,来实现I/O驱动程序与用户程序和实时数据库系统间的高速数据传递。