专用芯片ATT7022C的电参数测量模块设计

给出一种基于电能计量芯片ATT7022C和LPC2138的电参数测量模块的设计方案。详细描述了硬件电路接口和电能计量芯片与ARM通信接口的实现过程。通过实验对芯片进行软件校表,实现了电参数的精确测量。设计的电参数测量模块具有实时显示和与上位机通信的功能。     

基于谐波的无功功率补偿控制器研制探索

针对电网中谐波含量大及功率因素低的质量问题,设计了一种新的无功功率补偿控制器装置--TCR(晶闸管控制电抗器)+TS-HPF(晶闸管投切滤波器)混合型的无功补偿装置,控制器的主控芯片采用TMS320F2807,并配合使用高精度电能计量芯片ATT7022B,实现无功功率补偿和谐波抑制。     

配变监测终端的研究及开发设计

以C8051F120单片机为主控核心,结合三相电能专用计量芯片ATT7022E,设计了一种配电变压器运行状态监测终端。对硬件和软件设计进行了说明,实现了对变压器电压电流值、有功功率、无功功率、电能和功率因数等参数的实时监控。该装置具有精度高、可靠性强、性价比高等特点,完全能够满足配电系统的需求。     

新型三相电能计量系统键盘模块的设计

绍了一种三相电能计量系统,以ATT7022B为计量芯片,采用Freescale单片机MC68HC908LJ12为核心。根据系统的设计要求确定了键盘模块的硬件电路和软件程序,实现了测量有功功率、无功功率、视在功率等多种功能。     

ATT7022B在路灯智能控制器中的应用

本文介绍了以S3C44B0X为核心的新型路灯控制器的结构,提出一种利用电能专用测量芯片ATT7022B设计电参数采集电路的方法,采集路灯线路中的电流、电压、功率及总用电量等参数,有效监控线路的运行状况,达到节能和提高故障处理效率的目的。此设计具有精度高、易实现等特点。     

基于dsPIC的电力数据采集终端设计

为了满足智能电网中高级计量的需求,设计了以处理器dsPIC30F6012和电能芯片ATT7022A为核心的电能数据采集终端,并通过GPRS网络将电能数据上传至数据中心,便于对电网运行的分析监控。对系统的硬件和软件进行了设计,设计的电能数据采集终端硬件电路简单,易于实现,具有一定的参考实用价值。     

基于ATT7022B的配变监控终端的研究

介绍了一种基于ATT70228B电能计量芯片的配变监控终端的设计方法。系统以单片机AT89S52为控制核心，ATT7022B采集电能参数，GPRSDTU传输数据，实现对变压器的电流电压值、有功功率、无功功率、电能、功率因数等参数的实时监控，保证电网的安全运行。     

基于MSP430的一级三相费控智能电表的设计

随着国家电网在各地的智能电网改造逐步推进,本文提出一种基于三相电能计量芯片ATT7022B和超低功耗单片机MSP430的智能电表实现方案。使用C语言以IAR Workbench为平台进行设计,并完成校表和功能验证。     

C8051F350的多传感器测控平台设计

以C8051F350单片机为主控芯片,结合Labwindows/CVI 2012开发平台,设计了一种多传感器测控系统.系统主要包含以下4个部分:C8051F350控制器模块、传感器模块、受控模块和上位机.系统主要实现2个功能:通过上位机使C8051F350控制器模块控制传感器模块实现温度、湿度、电压和倾角数据的实时检测和显示功能;通过上位机使C8051F350控制器模块控制受控模块实现风扇、直流电机和4路继电器信号的控制功能.     

一种480MHz无线数传模块的设计

针对中国智能电网开放的免费无线计量频段,设计了一种可工作在470 MHz～510 MHz、中心频率为480 MHz、输出功率可调的无线数传模块。模块采用MSP430F2274单片机和射频芯片CC1100E设计,利用EDA软件ADS2008仿真优化了射频电路的输出匹配网络。最后对无线模块输出功率、通信距离等参数进行了测试和验证。     

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     

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。     

How do children do mathematics with LOGO?

Abstract  This paper considers some results of a study designed to investigate the kinds of mathematical activity undertaken by children (aged between 8 and 11) as they learned to program in LOGO. A model of learning modes is proposed, which attempts to describe the ways in which children used and acquired understanding of the programming/mathematical concepts involved. The remainder of the paper is concerned with discussing the validity and limitations of the model, and its implications for further research and curriculum development.