电力系统变电在线监测与状态检修分析

当前,我国电力系统的规模和容量在不断扩大,电力系统变电站是电源输送和分配的重要枢纽,一旦变电站出现问题,就会给整个电力系统造成很大的损失,所以要保证变电站中各种设备的安全、可靠运行。随着电力制度的不断改革,降低电力生产成本、提高电力系统变电站设备质量成为电力企业目前要解决的问题。而要想解决这一问题,保证电力系统的正常运行,就必须对变电设备进行及时的在线监测和状态检修。     

关于变电检修工作常见的问题分析与解决措施

电力系统是我国极为重要的能源系统,电力系统的正常运转与国计民生息息相关。变电检修工作作为电力系统维护中的重要组成部分,越来越受到社会各界的广泛关注,但是如今在变电检修的工作中普遍存在着一些弊端。正因如此,笔者针对目前变电检修工作中常见的问题进行探讨,提出相应的处理办法,供相关人员与部门参考使用,提高变电检修工作的效率和质量。     

变电设备全面技术信息微机管理

介绍如何使用ＩＢＭＰＣ机对电力系统中各类变电设备进行全面技术信息管理和对应检修试验的设备进行检修决策，编排出检修、校验计划，以促进电力系统中变电设备的自动化管理。     

变电设备检修模式的研究

由于我国变电设备采用传统的检修模式存在许多不确定的因素,限制了变电设备的全面发展。通过对变电设备的检修模式进行研究分析,根据变电设备所处环境的实际情况提出了变电设备的检修方案,对变电设备状态检修存在的问题进行优化分析,并给出变电设备的量化分析指标,有效解决变电站的维修成本高、检修人员不足等问题,从根本上提高变电设备的安全运行。     

电力二次设备检修中存在的问题与对策

当今社会,在社会生活各个领域人们不断增加对电力的依赖性,我国电力系统的容量和电网规模不断扩大。我国的电力行业在经济蓬勃发展的推动力之下,逐渐发展成为我国经济的支柱性产业。电力行业在社会各个领域发挥着重要的作用,因此提高对电力系统的运行的安全性、稳定性的保障必不可少。电力二次设备作为电力系统中重要的电气设备,随着电网规模的扩大和社会用电量的增加,其运行负荷也不断增加。与此同时,在电子技术、信息技术等行业的高速发展下,为电力系统二次设备进行检修提供了强有力的技术支持。因此,加强对电力二次设备的检修,提高电力系统运行的质量对整个国民经济的发展而言至关重要。但是,当前我国电力系统中针对电力二次设备的检修仍存在许多问题仍待解决。本文将就此些问题展开分析,并针对此提出相关的对策。     

变电站继电保护应用及二次线分析

随着我国经济的不断发展,以及人们对电力的需求不断增加,我国电力系统供电规模越来越大。电力系统是一个庞大而复杂的系统,其中变电设备的检修,是保证电网安全可靠运行、减少故障或事故的有效手段。平时除了要加强一次设备的巡视和检修,努力提高运维人员的继电保护技术水平,更显得尤为重要;由于二次线和保护密不可分,为了提高保护动作的准确性,二次线也是一个不容忽视的环节。重视继电保护的原理和应用,在变电站具有十分重要的现实意义。     

电力自动化变压器检修系统处理技术的探讨

随着计算机网络技术、电子控制技术以及信息技术的快速发展,电力自动化在电力系统管理发挥了重要作用,电力系统自动化的实现进一步促进了我国电力网络稳定、安全的运行,变压器作为电力系统运行中的重要设备,电力自动化变压器检修系统处理技术的应用进一步推动了电力自动化的发展成熟。本文主要分析的是电力自动化变压器检修系统处理技术,在全文展开论述的过程中主要从电力自动化变压器检修系统简介以及电力自动化变压器检修系统处理技术等两个方面进行了重点分析。     

电力系统变电运行安全管理和设备维护

目前,我国电力系统进入到了一个新的发展阶段,为了保证电力系统的安全、高效运行,我们要高度重视变电运行安全管理和设备维护工作。从电力系统的实际运行情况出发,介绍了变电运行安全管理措施,并在此基础上就变电设备维护工作提出了一些建议,希望对今后我国电力系统的发展能够有所帮助。     

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。     

变电检修工作现状及发展趋势浅谈

变压器是电力系统中的重要组成成分,变压器的运行状态关系着电力系统的稳定性与安全性。变电检修就是对变电器进行检查和维修,在电力系统工作中占重要地位。本文作者通过简单阐述变电检修工作的主要内容,分析其当前发展状况和存在问题,提出对变电检修工作的建议并剖析其未来的发展趋势。     

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。