基于嵌入式Linux和GPRS的远程抄表系统的实现

介绍了远程抄表系统中嵌入式手持终端设计,基于嵌入式 Linux 和 GPRS 实现了水表、电表和煤气表的三表远程抄表,并使用 Qt 设计开发手持终端的用户界面。手持终端部分通过 GPRS 通信完成与远程监控端和集中器之间的通信,可以实现移动自动抄表。     

基于PDA与Web Service的钢铁物流仓库管理系统的实现

手持终端是物流管理系统的重要组成部分。通过手持终端来采集、处理数据,实现物料管理的自动化。针对现代钢铁物流仓储管理系统的需要,设计了一种基于移动终端的仓储管理系统。采用Web Service技术实现手持终端与数据库的通信。重点介绍了手持终端系统的系统架构,功能模块,进行数据采集的方法以及无线通讯方式。设计充分利用了手持终端的移动性和Web服务的易用性,提高了企业仓储管理的效率。     

电梯钢丝绳张力监测系统的设计与实现

介绍了一种基于GPRS远程传输的新型电梯钢丝绳张力监测系统,它是由钢丝绳张力数据检测终端、GPRS数据传输网络、远程监测中心组成。文中对数据采集终端进行了软硬件设计,实现电梯钢丝绳张力状况的判断及与监测中心的通讯,并采用Visua1 C++面向对象的编程思想,完成电梯远程监测系统的上位机软件设计,记录每次电梯钢丝绳张力检测的状况。     

Web Services技术在钢铁物流仓库管理系统中的应用研究

针对现代钢铁物流园仓库管理需要,设计了一种基于移动终端的仓库管理系统。采用Web Services技术实现移动终端与数据库的通信。分析了Web Services应用架构模型,并按照Web Services模型来进行系统功能的总体设计。重点介绍了手持终端访问数据库的方法和Web服务的实现。设计的系统充分利用了手持终端的移动性和Web服务的易用性,操作方便灵活,提高了企业物流仓库管理的效率。     

移动应用技术在电梯监控系统中的应用

为满足用户随时随地远程监控电梯的需要,综合运用了移动应用技术、嵌入式技术,研究并设计了一个远程电梯监控系统。在监控系统整体架构基础上,通过终端控制器采集电梯运行状态与参数传输到远程手机设备,在远程手机设备上动态实时,为及时掌握电梯动态,实现电梯远程监控提供了一个很好的平台。     

基于Android云计算消息框架(C2DM)的FoxNews_ MID 手持移动系统的研究

FoxNews_ MID网络新闻应急管理系统利用Android云计算消息框架(C2DM)技术,实现了对手持移动终端远程典情等应急信息的推送,对当前社会维稳有实用性。论述了该系统FoxNews_ MID的功能、特点,讨论了其关键技术并给出了实现的关键程序。经试运行后表明,FoxNews_ MID系统可以实现基于C2 DM的对手持移动终端远程信息的推送、基于Andriod的手持终端信息的接收和当地典情新闻信息及数字媒体数据的上传。     

一种适用于GMR-1移动地面站的低功耗优化方法

在对地球同步轨道卫星的移动通信系统中,典型的移动地面站(Mobile Earth Station,MES)的主要形态是车载终端、便携式终端、手持终端.手持终端的电池容量有限特性使得低功耗设计成为手持MES的焦点问题.为了延长基于对地球同步轨道移动无线接口(GMR-1)标准的MES待机时间,根据其空中接口规范的特点,采用优化系统架构和合并周期性唤醒任务的方式,在保证系统性能的前提下,使得移动地面站的基带核心处理部分在典型待机场景下的功耗减少了20.9％.     

面向Android系统的手机电梯预约APP

本文针对电梯存在的预约地点固定、预约方式不灵活的问题,设计了一款手机App电梯预约系统.本系统以电梯运行数据采集、数据采集控制终端与服务器接入作为关键技术,实现了远程客户端与现场设备的数据共享和远程监视.现场设备采用RS485总线,通过嵌入式电梯控制器建立与服务器的连接链路.在移动客户端,根据电梯运行特性开发了手机应用,完成客户端数据实时更新.本设计基于Android系统,具有电梯位置显示、电梯人数监视、远程呼梯及电梯到站提醒等功能,方便用户根据电梯使用情况,合理规划乘梯时刻.     

基于B/S的电梯安全监控装置检测系统

针对当前电梯安全监控装置检测方式效率低下、检测记录维护困难的难题,提出了一种电梯安全监控装置自动化检测系统.设计了基于ARM和嵌入式Linux的检测仪硬件、软件系统,用于对监控装置的自动化检测.设计了基于B/S的Web服务器检测系统.通过以太网技术与检测仪进行通信,实现网上报检、检验信息的同步.该系统提高了电梯安全监控装置的检测效率,实现了检验记录的信息化管理.     

RFID技术在电梯检验系统中的应用

目前电梯检验效率低下,有必要利用计算机、通信等技术开发电梯检验辅助系统,提高检验效率。提出了在电梯检验系统中应用射频识别技术(RFID)来解决电梯身份识别难的设计构想,分析了电梯检验系统的总体架构和系统中RFID模块的构成,给出了RFID模块的软硬件设计。与传统的检验方法相比,RFID技术的应用能提高电梯检验工作的效率和质量,实现电梯身份识别的数字化和智能化。     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

Explanation and prediction: an architecture for default and abductive reasoning

Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.     

View-based model-driven architecture for enhancing maintainability of data access services

In modern service-oriented architectures, database access is done by a special type of services, the so-called data access services (DAS). Though, particularly in data-intensive applications, using and developing DAS are very common today, the link between the DAS and their implementation, e.g. a layer of data access objects (DAOs) encapsulating the database queries, still is not sufficiently elaborated, yet. As a result, as the number of DAS grows, finding the desired DAS for reuse and/or associated documentation can become an impossible task. In this paper we focus on bridging this gap between the DAS and their implementation by presenting a view-based, model-driven data access architecture (VMDA) managing models of the DAS, DAOs and database queries in a queryable manner. Our models support tailored views of different stakeholders and are scalable with all types of DAS implementations. In this paper we show that our view-based and model driven architecture approach can enhance software development productivity and maintainability by improving DAS documentation. Moreover, our VMDA opens a wide range of applications such as evaluating DAS usage for DAS performance optimization. Furthermore, we provide tool support and illustrate the applicability of our VMDA in a large-scale case study. Finally, we quantitatively prove that our approach performs with acceptable response times.     

A pragmatic multi-method investigation of discrepant technological events: Coping,attributions, and ‘accidental’ learning

Discrepant technological events or situations that entail a problem, a misunderstanding or a difficulty with the Information Technology (IT) being employed, are common in the workplace, and can lead to frustration and avoidance behaviors. Little is known, however, about how individuals cope with these events. This paper examines these events by using a multi-method pragmatic approach informed by coping theory. The results of two studies – a critical incident study and an experiment – serve to build and test, respectively, a theoretical model that posits that individuals use a variety of strategies when dealing with these events: they experience negative emotions, make external attributions, and adopt engagement coping strategies directed at solving the event, eventually switching to a disengagement coping strategy when they feel they have no control over the situation. Furthermore, users’ efforts may result in ‘accidental’ learning as they try to overcome the discrepant IT events through engagement coping. The paper ends with a discussion of the results in light of existing literature, future opportunities for research, and implications for practice.     

Three Process Perspectives: Organizations, Teams, and People

This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)^SM and Team Software Process (TSP){^SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.     

The Distributed Time-Triggered Simulation Scheme: Core Principles and Supporting Execution Engine

Distributed real-time simulation is a young technology field but its practice is under increasing demands. In recent years the author and his collaborators have been establishing a new approach called the distributed time-triggered simulation (DTS) scheme which is conceptually simple and easy to use but widely applicable. The concept was initiated in the course of developing a new-generation object-oriented real-time programming scheme called the time-triggered message-triggered object (TMO) programming scheme. Some fundamental issues inherent in distributed real-time simulation that were learned during recent experimental studies are discussed along with some approaches for resolving the issues. An execution engine developed to support both the TMOs engaged in control computation and the TMOs engaged in DTS is also discussed along with its possible extensions that will enable significantly larger-scale DTSs.     

Software-Konfigurationsmanagement in großen Softwareprojekten

Zusammenfassung Mit zunehmender Größe der Softwaresysteme verschärfen sich die für die Software-Herstellung typischen Probleme: Beherrschen großer Objektmengen, Erhalten der Systemkonsistenz, Kontrolle der ständigen Änderungseinflüsse und Gewährleisten einer langen Lebensdauer. Die Disziplin Konfigurationsmanagement bildet den methodischen Ansatz, diese Probleme besser zu beherrschen. Software-Konfigurationsmanagement faßt die Herstellung von Softwaresystemen als eine Abfolge von kontrollierten Änderungen an gesicherten Zwischen- und Endergebnissen auf. Dargestellt werden die Objekte und Funktionen des Software-Konfigurationsmanagements sowie die hierfür in großen Software-Projekten benötigten Methoden, Instanzen und Hilfsmittel.     

基于复小波噪声方差显著修正的SAR图像去噪

提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。