电力终端中ESD防护技术的研究

为了满足市场的需求,电力终端的功能越来越强大,而接口也越来越复杂多样,这些接口极易遭受ESD的干扰,导致电力终端失效甚至损坏。介绍了ESD的产生和危害,以及常用ESD防护器件的特点,并针对电力终端中存在的ESD问题,依据各接口的特点,从ESD防护器件的选型、ESD防护器件放置位置和PCB的布局布线角度出发,提出了ESD的解决方案,使电力终端更稳定,更可靠。     

电力负荷管理终端常见现场故障分析

介绍终端系统的组成及电力负荷管理终端在其中起到的作用,分析终端现场运行故障的原因,并提出相应的处理措施。     

基于B/S结构的电力负荷终端管理系统设计

电力负荷终端管理系统能够监测电力的使用情况和状态,为电力企业合理管理调度国家电力资源提供数据支持,从而减少企业管理压力和运行成本,提高工作效率,创造巨大的经济价值。笔者以重庆某电力企业B/S结构的电力负荷终端管理系统为蓝本,论述了电力负荷终端管理系统的系统架构,详细介绍了功能模块的划分以及与程序间的关系。     

基于商密算法的视频终端安全接入系统的研究与实现

在电网视频监控系统不断发展的同时,视频终端接入监控系统时的安全问题也在不断突出,信息泄漏、数据篡改以及恶意攻击等问题严重威胁着电网的安全。本文基于电网视频监控系统的应用现状以及安全风险,结合电力安全防护的要求,设计一种基于商密算法的视频终端安全接入系统,可实现电力视频终端的安全接入。最后通过实验测试分析并验证了该系统能够满足电力视频监控的安全防护要求。     

基于嵌入式数据库的电力负荷管理终端设计与实现

分析了电力负荷管理终端的功能需求;提出了基于嵌入式数据库的电力负荷管理终端的解决方案;在研究了嵌入式据库SQLite内部结构的基础上,设计了电力负荷管理终端的数据库系统;实现了基于嵌入式数据库SQLite的电力负荷管理终端的软件系统。     

基于可信计算的配电终端密钥管理技术

现有的配电终端缺乏有效的保护机制,存在诸多安全问题,因此将可信计算的思想引入到配电终端,设计适用于配电终端的电力可信模块ETM,针对配电终端设备的特点,结合当前国家电网的CA架构,提出一套基于可信计算的配电终端密钥管理方案。引入可信计算的配电终端可以实现平台的完整性保护、安全的数据加解密以及有效的身份验证,可与现有的电力CA系统做到无缝结合。     

基于电力现场校验系统的移动终端设计

传统的电力移动终端面对现今多种通信网络,存在多通信网自适切换应能力不足的情况。为此,设计基于电力现场的校验系统的移动终端设计。在原有移动终端的基础上,选择TU-30作为GPS模块的核心模块,实现对电力现场的定位,设计移动网络和WiFi网络融合的通信模块,并修改原有的供电电路,防止供电电压过低,利用电力现场校验系统处理现场校验数据,通过XMPP协议和Openfire服务器实现移动终端的通信功能,至此基于电力现场校验系统的移动终端设计完成。测试结果表明:与传统的电力移动终端相比,设计的基于电力现场校验系统的移动终端多通信网自适应切换时间缩短了3倍左右,大大提高了多通信网自适应切换能力。     

基于森林算法的电力计量终端通信故障识别

针对当前电力计量终端通信故障识别存在识别正确率、召回率较低的问题,引入森林算法,尝试开展对其故障识别方法的设计研究。通过对电力计量终端通信数据预处理、基于森林算法的故障的识别随机森林模型构建、电力计量终终端通信故障识别与排查,提出一种全新的故障识别方法。通过实验的方式将新的故障识别方法和基于样本均衡与特征交互的识别方法应用到相同环境,验证表明新的识别方法具有更优的正确率和召回率,进而促进识别精度提升。     

FLASH存储器在电力数据采集终端中的应用

FLASH存储器因为其容量大、数据的非易失性而在各种工业产品中得到广泛应用,本文介绍了一种SRAM＋FLASH的存储方式在电力数据采集终端中的应用,电力数据采集终端符合Q／GDW130—2005电力负荷管理系统数据传输规约,要求终端存储电表的各种历史数据,支持主站对各种数据的实时查询。     

基于EDR技术与机器学习的电力物联网终端安全防护系统

近年来,随着物联网技术在电力行业的广泛应用,其面临的安全问题也逐渐引起了社会各界的广泛关注,终端设备作为物联网中重要组成部分,由于其系统多样、计算资源有限、难以感知等特点更为电力物联网系统安全防护带来难度。本文将终端检测与响应技术(EDR)以及机器学习算法应用在电力物联网终端安全防护中,覆盖系统基线安全、文件安全、登录安全、流量安全、行为安全等全方位的物联网设备深度监控体系,实现从传统信息安全时代的边界防护到物联网设备边缘防护的安全升级。     

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.     

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。     

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.     

基于AD9626的模拟信号采集存储卡设计

自然界的绝大部分信号都是以模拟的形式存在,因此模拟信号的采集转换存储在数字时代十分关键。文章讨论了在雷达信号处理领域基于AD9626的AD采集存储卡的设计原理、硬件结构和程序设计与芯片配置等问题,为今后相关领域的研究提供了可参考的方案。     

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.     

A human-computer interface for non-computer specialists

The COM teleconferencing system was designed to be easy to use for both beginners and people with much computer experience. A number of design choices in organizing the human-computer interface were considered very carefully. These design problems are not unique for teleconferencing applications, but will appear in many other developments of human-computer interfaces for non-computer specialists. This report discusses naming conventions, menu format, user commands, help facility and the treatment of ‘type ahead’ from the users.