一种新型光伏发电数据采集系统的设计

采用三相电能计量芯片ADE7758代替通用AD作为并网光伏发电交流量的采集,研制了基于ADUC812和ADE7758的太阳能光伏发电智能数据采集装置。该装置在现场可以对并网光伏发电系统进行数据采集、实时监控和管理,具有实时性好、精度高、成本低等优点。实验结果证明该数据采集系统适用于大型光伏发电测控要求,可以很有效的反映光伏发电系统的运行特性。     

太阳能光伏发电无线远程监控系统的研究与设计

为了满足光伏发电系统的网络化、智能化和可操作化的要求,研究并提出了一种太阳能光伏发电控制系统;该系统硬件结构采用DSP芯片TMS320F2812和CPLD的EPM240,软件系统下位机则固化在DSP芯片中,上位机由C++builder编写,极大地提高了太阳能发电的自动化水平;同时提出了一个基于GPRS网络的远程监控系统设计方案,将远程监控技术融入到光伏电站的管理中,可以将地域上广泛的、分散的太阳能光伏系统联系起来,实现集中式的监控和维护;经实验验证,该系统工作稳定,性能优越.     

CAN通信协议在光伏电站监控系统中的应用研究

针对光伏产业以及工业过程控制技术的快速发展,为开发和利用新能源,论述了CAN总线在光伏监控系统中的应用,并设计了一个运用CAN总线和DSP实现的光伏发电监控系统。该系统的底层通信协议采用CAN总线,结合TMS320F2812 DSP芯片以及外围电路,实现了PC机与DSP之间的实时高效通信[1],并通过实验数据的测试、交互得到了准确的验证,该系统可以实现实时远程监控光伏发电系统的运行数据。     

基于物联网的太阳能光伏组件监控系统的研究

针对太阳能光伏组件管理维护的相对薄弱现状,提出了一种基于物联网的能够完成光伏组件准确定位功能的太阳能光伏组件监控系统,该系统的设计中融合了自然能量的采集和存储技术、智能无线传感器技术、实时无线网络通信技术及Web和数据挖掘分析平台技术;实践证明,系统数据传输效果好、性能稳定可靠,能实时与监控中心进行通信,实现了电压、电流、功率、累计能量等参数的采集及光伏组件实时监控等。     

基于STM32和LabVIEW的光伏发电监测系统的设计

提出了基于STM32和LabVIEW的光伏发电监测系统的设计方法.以STM32作为数据采集器的核心,对系统的光伏板侧温度、光强以及控制器和逆变器的电压、电流等数据进行采集,并通过RS-232总线将其送到PC中.在上位机利用LabVIEW搭建虚拟监测平台,能实时显示系统运行状态,便于系统的管理和故障排查.     

基于LabVIEW的太阳能制冷监控系统设计

随着全球人口急速的递增使得能源消耗量日益递增,所以利用一些无限再生的能源来代替其它再生速度慢及不可再生能源是至关重要的,太阳能即是无限再生的能源之一;监控系统下位机设计采用STM32F105作为主控芯片完成数据的采集,上位机设计是基于Lab VIEW搭建的虚拟太阳能制冷监控系统,通过串口通信的方式与下位机连接实现了对环境中温湿度的实时监测、数据存储、自动控制和报警等功能;通过测试,结果表明该系统温度准确性等级为0.5,分辨力为0.1℃;湿度准确性等级为0.5,分辨力为1％RH,整个太阳能制冷监控系统运行正常.     

太阳能光伏发电系统数据采集和测试平台

太阳能光伏发电系统利用可再生能源太阳能来提供稳定的电力供应,污染小,因而在近几年得到了很广泛的应用.本文设计了一个以LabVIEW为软件支持、以数据采集卡为硬件支持的虚拟仪器来评测光伏发电系统的性能,并拥有数据采集、数据保存和信号分析等功能.在这个所提出的系统中,测量的信号包括气象参数(如温度等)和电气参数(比如光伏阵列的电压和电流等).实验结果证明这套系统可以很有效的反映光伏发电系统的运行特性.     

基于LabVIEW和LoRa技术的光伏电池组件参数监测系统设计

文中提出了一种光伏组件运行参数的远程监控系统设计方案,由STM32单片机作为下位机核心控制器,负责采集光伏组件的输出电压和电流,并通过DHT22传感器采集环境温湿度,将采集的运行数据通过LoRa无线模块发送给上位机PC端;上位机程序由LabVIEW开发,实现对运行参数的实时显示、波形显示和数据存储。本监测系统有利于减少光伏电站在日常维护过程中的人力投入。     

基于PLC与ZigBee的室内环境监控系统设计

环境监测点位具有分布范围广、点位多等特点,建立一套基于无线传感网络的环境实时监控系统,实现对区域内环境要素的在线监控,对及时掌握环境状况及有效控制环境污染的扩散有着直接而重要的作用;以CC2530芯片为核心构建ZigBee无线传感网络,并通过主控制器PLC将采集的数据进行分析与处理;利用主协调器及PLC将接收的监测数据传至上位机进行实时显示,由监控平台,结合红外收发器完成对外部设备的远程控制;上位机采用Wincc组态软件,结合西门子精智面板提供优异的人机交互界面体验;通过实验测试表明,该系统可实现大范围的室内环境参数的采集和传输以及远距离监控功能,且具有安装方便、扩展性强等特点,适用于需进行统一管理的智能楼宇建筑。     

光伏发电的嵌入式系统电源设计

基于光伏发电的嵌入式系统电源,利用铅酸电池、太阳能电池板和相应电路,调控光能采集并进行储存。通过UC3906铅酸电池充电管理芯片及外围电路构成智能充电模块,最大限度延长了铅酸电池的使用寿命;利用Buck—Boost电路和单片机控制回路提供太阳能电池板最大功率跟踪,保证了供电效率;采用光电耦合器提供双电源切换功能,确保在...     

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。