电力系统变电运维安全管理与设备维护

电力系统变电运维安全管理与设备维护是一项对操作人员要求极高的工作,由于这项工作的复杂性,变电事故发生的概率大大增加。这样无疑会影响到正常的供电,更甚者会严重影响供电企业的经济损失。本文首先分析了变电运行安全管理和设备维护中存在的问题,然后详细阐述了电力系统变电运行安全管理与设备维护的要点。     

220kv变电运行故障及其排除分析

220kV变电运行的主要工作是电力设备的维护管理和运行操作,在变电运行过程中,需要维护的电力设备较多,变电运行发生故障和出现异常的机率很大。为了保障220kV变电运行的安全稳定性,必须要针对220kV变电运行故障,积极采取有效措手,做好故障的排除工作,保障我国电力系统的正常运行。本文分析了220kV变电运行的设备检修,阐述了220kV变电运行的故障分析和排除策略。     

变电运行维护技术分析

变电运行是电力系统的核心工作,变电设备的运行维护对电网安全具有重要意义。本文针对东阳供电局35kV变电站的变电运行维护现状,分析变电运行设备常见故障原因并提出相应的维护策略和具体的日常维护措施以提升变电运行的实际能力,确保电网安全。     

浅议变电站变电运行管理措施

随着我国科技水平的不断提高和经济水平的不断发展,使变电站变电运行的设备和规模都有了一定程度的变化,变电运行的主要作用是电力设备的维护管理和运行操作,变电运行是电网运行的基础,只有做好变电运行电网才可以得到安全稳定的发展。为了符合变电运行变化的要求应对传统的变电运行管理方式进行改革和优化,保证电网的安全稳定运行。本文对变电站倒闸的管理措施和操作管理规定进行了分析,总结了变电站运行管理的要求,对变电站变电运行的安全管理、运行模式、运行中存在的问题进行了探讨。     

电力系统中的变电安全运行故障及对策分析

近些年,我国电力系统有着飞速的发展,生活中各行各业都需要用到电。电力系统常出现各种安全运行故障,故障直接影响着我国电力系统变电运行的安全性和稳定性。为此,笔者在下文中结合自身多年的电力行业的工作,就我国电力系统中变电安全运行故障进行了总结,并针对这些故障给出相应的解决措施,以最大程度预防电力系统中变电安全运行故障的出现,减少其故障对企业带来的损失。     

电力变电设备状态检修技术与管理措施分析

新时期经济的发展对我国电力系统提出了更高的要求,我们必须加强对电力变电设备的检修,确保我国电网的安全运行。其中,在电力变电设备检修中,状态检修技术的应用大大提高了检修工作效率,对电力系统的发展具有重要作用。     

电力系统变电运行中的信息管理技术分析

随着我国经济水平和科技水平的不断提高,推动了我国电力行业的快速发展。但是在电力系统的运行中,安全问题是其中最重要的组成部分。安全问题不仅包括了电力设备的安全、物理安全,而且还包括了电力系统的信息安全。因此,加强电力系统变电运行中的信息管理,提高信息管理技术在电力系统变电运行中的应用,对于促进电力系统的安全稳定运行具有十分重要的意义。     

变电运行故障排除及安全探析

小到人们日常的生活与工作,大到国家的生产与建设,都离不开电力系统的支持。国家每年都会将大量的成本投入到电力系统的运行中,并根据时代发展的需要,对电力系统进行更新变革。变电在电力系统运行的过程中起着至关重要的作用。近年来,国家相关部门不断加强对变电运行的重视程度,尤其在变电运行的故障排除和安全管理工作方面,更是加强了研究力度,以便为国家电力系统的正常运行提供保障。本篇文章就变电运行故障排除及安全管理探究方面的内容展开论述,仅供参考。     

浅谈电力系统的变电运行安全与管理

电力变电是一项繁琐、复杂的系统工程,随着人们生活水平的不断提高,人们对电的需求量越来越大,为了满足人们的日常生活需要,就要求电力系统的整体水平必须进一步提高。电力系统在人们的生活和工作中占有非常重要的地位,加强电力变电系统的管理,保障电力变电系统变电运行的安全,是确保人们的生活质量的重要途径。电力变电是电力系统中最为关键的一部分,每一个环节都能直接的影响整个电力系统的供电质量,因此本文主要根据电力变电的工作原理和特点对电力系统的管理制度和安全措施提出了相关的建议,希望有助于我国电力系统的变电安全的提高。     

变电运维常规故障的排除及设备维护有效措施

本文将从变电运行的控制和维护为出发点,对变电运行中进行设备维护的技术要点进行介绍,并且阐述故障的出现原因和排除方法,阐明要确保变电运行的安全,从加强日常的管理和维护入手的重要性和必要性。     

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.