无线测控技术在太阳能路灯综合管理中的应用

以解决现存太阳能路灯无法实现工作状态和参数的远程测控等问题为目的,将分布智能式结构的概念引入路灯管理控制;采用以内嵌微控制器等模块的测控终端为智能节点、通过无线数传电台组建无线网络的方法,设计完整的太阳能路灯远程无线综合管理与控制系统;实现对太阳能电池板、蓄电池及LED灯工作电气参数的实时监测,以及测控分站与测控主机、上位机依次阶梯递进构成通信网络;该系统诊断故障及时准确、组网便捷,在节能减排、广泛推广太阳能路灯方面具有很大的意义.     

太阳能LED路灯控制系统的设计

设计了一套基于STC12单片机的太阳能LED路灯控制系统,系统采用变步长的电导增量法跟踪太阳能电池板最大功率点,充分利用太阳能电池板的能量,对铅酸蓄电池充电。同时实时监测铅酸蓄电池的电压防止蓄电池过充、过放等现象;对LED路灯采用多段式的恒流控制,通过环境照度的监测控制LED路灯在不同电流强度下工作,以增强LED路灯的使用寿命,实现节约用电的目的。     

基于GPRS和ZigBee的节能型LED路灯智能控制系统

针对现有城市路灯控制系统路灯使用寿命短、无法远程操控、不能自动识别故障路灯的问题,提出一种基于GPRS网络技术和ZigBee无线通信技术的节能型LED路灯智能控制系统,使用ZigBee无线网络与LED路灯控制终端通信,并通过GPRS通讯模块接人GPRS网络与远程控制中心相连,实现远程控制LED路灯,此外,通过LED路灯控制终端实时采集路灯电压和电流,实现LED路灯的远程监控;具体阐述了GPRS通讯模块、ZigBee无线网络模块、LED控制终端的硬件设计方案,软件设计流程,系统通信协议和远程控制实现方法;测试结果证明此系统数据传输可靠、响应及时、成本低、易于实现LED路灯的远程控制和远程监控,具有较大的实用性和推广价值.     

双Buck太阳能LED路灯照明控制系统

利用新型能源,把太阳能和高效节能的LED路灯有机地结合在一起,开发出一款基于STC12C5410AD单片机的双Buck太阳能LED路灯照明控制系统.前级基于IR2104的同步Buck电路实现最大功率充电,后级采用同步Buck实现LED灯恒流驱动.该控制器具有驱动能力强,DC-DC转换效率高,最大功率点跟踪充电和浮充充电...     

基于STC8单片机的太阳能路灯控制器的设计

随着太阳能的广泛应用和大功率、高亮度照明LED技术的成熟,太阳能LED路灯得到了广泛的应用,本文设计了以STC单片机为核心的太阳能路灯控制器硬件电路,并提供了系统软件设计,本系统控制器具有过充、过放、过载、短路等保护措施,可以延长蓄电池使用寿命。     

大功率LED路灯散热设计与分析

随着建设资源节约型环境友好型社会理念的不断深化,作为城市发展中重要的基础设施——道路照明,存在能耗高、浪费大等诸多问题.为此,许多城市选择安装具有节能、环保、长寿命等突出优势的半导体照明（LED）路灯.但由于目前LED芯片的光电转换效率还较低,消耗电能中约80％转换为热能,若不能迅速散发这一部分热能,将会导致LED芯片的结温升高,最终降低LED路灯的使用寿命.因此,改善大功率LED路灯的散热问题是攻克大功率LED路灯的关键.为此从LED路灯产品的经济性以及可靠性角度出发,综合考虑影响散热器散热效果的多个因素来设计LED路灯散热器.并通过CFD软件Fluent进行模型的散热计算分析,验证了设计的LED路灯散热器具有良好的散热性能.     

基于Zigbee的道路照明控制系统研究

本文介绍了一种新的基于Zigbee无线通信技术的道路照明控制系统。该系统能实现路灯无线单灯控制、LED光源亮度的线性平滑调节、电能质量数据采集、故障检测及故障位置显示等功能。该控制系统能满足现代物联网概念对照明技术提出的要求,系统简单、功能强大,具有广阔的应用前景。     

LED路灯智能控制系统核心技术开发分析

目前,大多数的LED路灯系统虽然比较完善,但是在技术应用方面并没有进行智能控制,一般采用直接照明方式。因此,为了能够提高LED路灯的使用效率,有效节约能源。开发智能控制系统,对于LED路灯照明系统有着非常重要的意义。因此,本文通过对LED路灯照明系统进行分析,并针对智能控制系统应用进行探讨,解析LED路灯照明系统中的智能控制系统的核心技术开发。     

ZigBee技术在智能小区LED路灯控制系统中的应用

针对智能小区的特点及需求,基于ZigBee技术建立了无线传感网络,并以LED路灯为光源,以PT4115为路灯恒流驱动芯片,设计了一种小区路灯控制系统.该系统具有组网简单、智能化程度高、成本低廉、运行可靠及节能效果好等优点.     

太阳能供电LED 路灯控制电路系统设计及实现

近年来,随着能源短缺、环境污染等问题的加剧,太阳能作为可再生能源具有清洁性、安全性、资源充足性等优点,日益受到广泛关注。LED太阳能光伏照明,是太阳能应用的一个重要领域。本设计是以单片机为核心的太阳能供电LED路灯控制电路系统。该系统使用AT89C51单片机作为电路的核心控制器件,由多晶硅太阳能电池、蓄电池、电源管理电路、时钟电路、光线检测电路、模式切换电路等组成。该系统可以手动控制路灯的开关,还可以根据光线的强弱变化自动控制路灯的开关,具有性能可靠、安全环保、方便快捷等优点。     

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     

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。     

基于QTE的蒙古文显示机制研究与实现

蒙古语言是中国蒙古族使用的通用语言,由于蒙古文区别于其他文字的书写方式和其自身变形机制等特点,在很多通用的文字处理引擎中都不被支持。在嵌入式产品开发与应用领域中Linux加QTE已经成为流行方式。该文给出了一种在QTE环境上实现基于标准Unicode的蒙古文点阵显示和变形算法, 并自定义了支持蒙古文的QTE组件,扩展了QTE功能,为在Linux加QTE方式的嵌入式体系结构中处理蒙古文提供了一种解决方法。