掌上电脑在智能小区自动抄表系统中的应用

针对目前远程自动抄表的不足之处，提出了以掌上电脑为抄表和现场调试维护工具的智能小区自动抄表系统。介绍了系统的结构、特点和应用程序。该系统具有低功耗、稳定可靠、效率高和现场调试维护方便等特点。     

基于数据挖掘的智能用水监控系统

在原有的基于以太网的自动抄表系统基础上增加了基于CDMA的无线自动抄表功能和短时用水量预测功能.该系统具有学习速度快.在小样本情况下具有良好的非线性建模和泛化能力,预测精度高等优点.实践证明此远程智能监管系统运行经济可靠.     

远程无线抄表系统的研究

针对传统的手工抄表方式费时、费力,以及准确性和及时性都得不到保障的缺点,基于GPRS网络和ZigBee无线通信技术,构建了一种无线抄表系统.该系统避免了长距离布线和复杂的线路干扰,可以快速抄写并实时上传表上的数据,且数据传输可靠.结果表明,此无线抄表系统能够准确、可靠地完成数据的采集、处理以及传输等功能,完全满足要求.     

面向智能小区的WiFi自动抄表系统研究

在居民小区逐步朝着智能化、数字化、互动化方向发展的同时,为实现智能小区的自动抄表,提出了WiFi自动抄表系统设计方案。具体给出了采用无线与有线相结合的异构网络结构。分别对该方案的装置和管理软件进行了设计,并实现了对WiFi自动抄表系统的组网测试。测试结果表明,该系统能够方便快捷地接入网络,WiFi抄表终端能够稳定可靠地抄取电表数据;同时,WiFi网络覆盖范围满足智能小区的抄表需求,整个系统可实现远程自动抄表。     

无线远程抄表控制系统的设计与实现

该文简述了现代自动抄表系统的概念,结合笔者承担的无线远程抄表系统项目,对项目的数据通信控制模式进行了分析,介绍了系统设计的整体架构并对系统通信控制的软硬件和功能设置进行了详细说明.采用GPRS模块进行远程无线传输,采用CAN总线实现现场采集模块的实时通信,控制模块采用高性能的ARM处理器和单片机.该系统具有安装使用方便、数据传输可靠、快速的特点.     

一种基于ZigBee的无线抄表系统研究与设计

提出了一种基于短距离无线通信技术ZigBee的三层分布式无线抄表系统,系统由低功耗片上系统CC2530构成采集器、路由器、集中器,采用ZigBee传感器网络进行数据通信,与远距离无线网络GPRS相结合,系统兼具分布式与集中式的特征,可实现在主动抄表方式下各数据采集单元的定时采集,以及被动抄表方式下单播、组播和广播等多种集抄方式,且具有低功耗、低成本、高可靠性数据传输的特点.     

基于PFC和GPRS的远程自动抄表系统设计

针对我国电网环境复杂、现有抄表系统运行效果不理想等问题,设计了一种基于工频通信(PFC)和GPRS技术的远程自动抄表系统,并给出了集中器和采集器的硬件设计方案.该抄表系统不仅能够保证数据稳定、可靠地传输,而且能够实现对用电装置的实时跟踪监测.为了有效地抑制电力谐波的干扰,采用小波和联合近似对角化(JADE)相结合的方法米实现通信信号的检测.运用Matlab对该方法进行仿真,结果验证了该方法的有效性.     

基于工作流的Zigbee无线抄表系统设计与实现

Zigbee是一种新型的低成本、低功率、自组织的无线通信技术,是实现近距离传感器网络的理想解决方案.该文从工作流的角度设计了Zigbee无线抄表系统,首先详细介绍了该抄表系统的状态转换过程和工作流程,然后分别阐述了系统内协调器和路由节点的工作流程,最后在此基础上,实现了Zigbee网状网络的抄表系统.实验结果表明,该系统具有低功耗、自组网、自动路由和自愈功能,适用于居民小区抄表.     

全电池供电分线式智能水表抄表系统

全电池供电分线式智能水表抄表系统适用于水表出户集中放置或高层住宅层问穿线困难的使用环境。该系统采用高可靠双干簧管发信基表,并配置了采用专用集成电路而非单片机的智能数字式水量采集模块,具有抄读率高、功耗低、全电池供电、长期运行稳定、可靠的突出优点。     

基于物联网的智能抄表高效TDMA协议设计

针对基于物联网的智能抄表系统节点众多、可靠性要求高、网络拓扑多变的特点,提出了一种用于智能抄表系统的高效时分多址E-TDMA协议。该协议基于Mesh网络架构,采用分布式协同调度的方式局部调整节点的时隙分配,并能进行网络拓扑调整。此外,E-TDMA还提供差异服务。采用NS2对协议进行仿真比较,结果显示,E-TDMA具有更好的性能,为基于物联网的智能抄表系统提供了高效的信道接入和可靠的质量保证。     

Only connect: teaching, technology and telesis

Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.     

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。     

Avoiding semantic and temporal gaps in developing software intensive systems

Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.     

Designing economic np control charts: A programmed simulation approach

This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.     

The development of robot art

Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008     

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.     

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.     

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。