Shorts in self-checking circuits

It has been noted by several authors that the classical stuck-at logical fault model might not be an appropriate representation of certain real failures occurring in integrated circuits. Shorts are an important class of such faults. This article gives a detailed analysis of the effects of shorts in self-checking circuits and proposes techniques for dealing with them. More precisely, we show that, unlike other faults such as stuck-at, stuck-on, and stuck-open—which produce only single errors in the place they occur—shorts can produce double errors on the two shorted lines. In particular, feedback shorts can produce double errors on the two shorted lines. The double error is unidirectional for some feedback shorts and non-unidirectional for some others. Furthermore, in some technologies (e.g., CMOS), non-feedback shorts can also produce double non-unidirectional errors. We also show that unlike stuck-at, stuck-on, and stuck-open faults, redundant shorts can destroy the SFS property. Then we propose several techniques for coping with these problems and we illustrate the results by circuit implementation examples.The present study is given for NMOS and CMOS circuits but we show that it is valid for any other technology.     

一种油量在机车信息平台中实时显示的方法

介绍了在运输部信息平台中实现油量实时显示的过程。油量传感器产生的电流模拟信号分成两路，一路传给无纸记录仪，另一路经过电压转变后送至信息平台的状态监测仪，经过状态监测仪的G2002B板处理后通过串口传给工控机，在信息平台上实现油量的实时显示，作用除了提醒司机适时加油以外，更重要的是判断机车作业的油耗情况。     

Evaluating Community Safety Programmes and Community Engagement: The Role of Qualitative Methods and Collaborative Approaches to Policy Research

This article explores the role of qualitative and collaborative methods when undertaking evaluation research into local community safety partnerships and neighbourhood strategies. It draws on recent examples of research and evaluation studies of regeneration and community safety programmes in a number of cities and towns in England. The discussion is set against the background of the major changes in policy relating to crime and community safety, particularly the introduction of Crime and Disorder Partnerships and their engagement with local communities. The value of qualitative methods in exploring some key questions is discussed, particularly within a collaborative approach to policy research.     

液压激振系统的检测与控制

本文阐述一种用于控制液压激振装置加载力和加载频率的机液电系统。简要叙述液压激振器的基本原理和特点。分析了双闭环控制回路。重点介绍激振力和激振频率的检测和处理技术。     

基于共同好友数的在线社会网络社区发现算法

为了快速准确地找到在线社会网络的社区结构,提出了一种基于共同好友数和节点邻居信息的社区结构发现算法。该算法以共同好友数最多的两个节点为初始社区,不断寻找与社区连接性最强的节点,并以节点Q值为衡量标准,判断是否将该节点加入到初始社区中,最后根据节点邻居所在初始社区信息确定最终的社区划分。针对两个经典社会网络和人工生成网络数据的实验划分结果表明,该算法是可行和有效的。     

电力变压器蒸发冷却装置FC液位监控系统

介绍电力变压器蒸发冷却装置的液位控制系统,该系统以嵌入式以太网芯片为核心构成网络终端,实现了冷却介质FC液位的远程监测调节。     

基于WBAN的智能康复监测护理系统设计和实现

针对传统生理参数监测的不足,基于无线体域网（WBAN）设计并实现了用于康复训练的智能康复监测护理系统。本文首先根据人体生理信号检测原理检测人体的心电、皮肤电阻、脉搏和体温信号,然后通过Crossbow无线传感器网络平台将检测到的数据实时传输到上位机,最后在上位机监控软件上实现对患者的生理信号实时显示和监控。文中详细介绍了系统的软、硬件设计,并对实验结果进行了处理和分析,实验结果表明该系统能对患者的生理状态进行实时监测。     

多字体印刷藏文内容监测系统研究

针对藏文舆情分析中藏文印刷品和藏文图片内容无法自动监测的难题,文章在深入分析印刷藏文字符特征和藏文文本特点的基础上,提出支持多字体印刷藏文内容监测系统的实现方法,重点阐述藏文字符的特征提取、分类算法以及藏文文本内容监测方法。     

放电故障紫外检测系统及其状态识别方法

紫外成像检测技术是一种检测高压设备故障的新方法;在此技术上研究设计了一种放电故障紫外检测系统,该系统能对实时采集的紫外图像进行相关的技术处理,同时可对故障点进行准确定位;根据数据建立了设备状态模型并提出一种基于人工神经网络的状态识别方法,应用MATLAB工具进行神经网络的设计和模拟,仿真结果达到预期效果;该系统可以准确地诊断设备的故障和运行状况,有较好运用前景和理论意义。     

基于GPRS的油烟监控数据采集终端设计

针对餐饮企业引发的城市空气污染日益严重的问题,根据当前国家环保建设发展重点和餐饮业油烟检测要求,设计了一款油烟环境系统的数据采集终端,通过气体传感器和温度传感器采集油烟数据,再经过终端控制器进行数据处理,并通过GPRS上报系统的监控中心,为环保局及其他行政管理部门提供实时的区域油烟净化势态综合数据。