智能化配电网运行方式优化的分析

随着经济快速发展,人们对电力资源的需求越来越大,电力企业发展过程实现智能化运行成为电力行业发展过程中的一个重要趋势,电网运行过程中的智能管理系统的构建,成为当前电网发展过程中的一个重要组成部分。本文对智能电网中配电网运行方优化过程中存在的问题进行分析和探讨,旨在提高电力系统的运营效率。     

谈110kV变电站运行接线方式及调度运行

改革开放以来,随着我国经济实力的不断提升,我国电力系统和电网事业也获得了突飞猛进的发展,人们生产生活对于电力资源的依赖性越来越大,这就需要电力部门确保在进行电力调配和输送过程中的运行安全。为保证我国社会的用电安全,电力部门一直在进行着电网改革工作,对电力变电站的运行方式以及电力资源调度方式不断进行更新换代,本文就目前我国110kV变电站的发展现状,简要分析110kV变电站运行接线方式及调度运行情况,并提出相关建议。     

浅析电力系统调度运行的危险控制措施

众所周知,电力资源是人们日常生活和生产过程中必不可少的,因此电力系统的稳定性和高效性是当前电力领域必须重点关注的问题,这将对电力领域的发展有着积极的意义和深远的影响。与此同时,随着我国经济与科技的迅猛发展,故而也对电力领域提出了更高的要求和挑战。现阶段,我国致力于进一步保障电力系统调度运行的安全性,最大程度的减少或者避免运行过程中可能出现的风险问题,从而不断提高人们的生活质量,为电网的安全运行提供强有力的保障,进一步的推动我国在电力领域的发展。     

电网规划与电力设计对电网安全影响探讨

社会经济的发展也促进了不同行业的竞争与发展,社会主义市场经济中不同行业获取更多的市场资源与竞争机会,但是在行业发展中对电力能源的需求量也不断增加,电力企业在实际运营管理中需要加强电网规划与电力设计,维护电网运行安全与效率,提高供电质量。电网在电力系统中主要负责电能的分配与传输工作,要促进电力系统的稳定、正常运行,需要应用合理的规划、设计与管理手段,为电网运行提供基础性的安全保障。本篇文章在此基础上主要对电网规划与电力设计对电网安全影响的重要性进行研究与分析,重点探讨电网规划与电力设计的内容与要求。     

电网调度运行安全管理中的问题分析

近年来,随着我国社会主义市场经济的快速发展以及电力科技水平的不断提高,人们开始越来越注重关注电网调度运行的安全管理问题。本文详细地分析了目前电网调度安全运行管理过程中存在的各种问题,并针对问题提出有效性解决对策,以期为电力系统安全、稳定、可靠的运行提供强有力参考依据,最终达到推动电网工程不断向前发展的目的。     

浅谈10KV供电系统继电保护

随着电力系统的高速发展,电网规模日益壮大,电力系统网络结构更显复杂,提高电力系统的安全运行水平尤为重要。在电力系统中,各种类型的、大量的电气设备通过电气线路紧密地联结在一起,电气故障的发生是不可避免的。继电保护是确保电力系统安全可靠运行的重要装置,保护装置动作的正确性将直接影响整个系统的安全稳定运行。     

浅谈10KV供电系统继电保护

随着电力系统的高速发展,电网规模日益壮大,电力系统网络结构更显复杂,提高电力系统的安全运行水平尤为重要。在电力系统中,各种类型的、大量的电气设备通过电气线路紧密地联结在一起,电气故障的发生是不可避免的。继电保护是确保电力系统安全可靠运行的重要装置,保护装置动作的正确性将直接影响整个系统的安全稳定运行。     

励磁控制对电力系统稳定性及电网可靠性分析

随着远距离输电系统的不断发展以及大容量发电机组在电网中不断的投入运行,电力系统正朝着大型联合电力系统的方向发展,由于电网规模扩大,运行越来越复杂,电网安全稳定性问题越来越突出。本文针对同步发电机励磁控制下的电力系统及参数对电网平衡点的局部稳定性分析,并分析其对电网可靠性的影响。     

电网工程无功补偿配置原则及问题分析

针对电网无功配置不足或过剩将会造成电网电压波动、电网调度运行管控困难、设备利用率低、电网投资浪费、不利于电力系统安全稳定运行等问题。本文从电网工程可行性研究报告的评审角度出发,提出了电网无功补偿装置配置原则,明确了接入电网的基本要求和功率因数的补偿要求,同时在电网工程可行性研究阶段变电站无功补偿配置的设计思路和方法基础上,结合电力系统中无功负荷（损耗）、无功电源等计算过程,对电网工程无功配置设计中普遍存在无功负荷统计值偏大、忽略无功电源提供的无功功率和忽视电容器组投切电压波动及谐波校验等问题进行分析和总结,提出变电站无功补偿选型设计和评审过程中关注的要点,以达到在确保电网安全可靠运行的基础上,经济合理配置无功补偿设备,提高电力系统经济运行水平,节省电网工程建设投资的目的。     

电力系统信息安全的重要性及防护探微

近年来,我国电网改扩建速度加快。电网的安全稳定运行直接影响到社会经济的健康发展。电力系统作为开发电网安全运行的第一道防线。当电力系统本身的保护功能不正常或不起作用时会严重影响电力系统的正常运行。本文阐述了电力系统信息安全的重要性,对电力系统存在的问题进行了分析并提出了相应的解决措施。     

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。