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在核电站安全级DCS设计中,为提高系统的可靠性,需保证安全级电气设备和电路之间的有效隔离,为了实现电气设备和电路的隔离,核安全相关法规标准提出了实体分隔、电气隔离等设计手段。本文通过对核电站安全级DCS隔离相关法规标准的分析,得出了电气设备和电路隔离的设计要求,提出了设计过程中应采取的方法和措施,并在此基础上给出了具体的实体分隔和电气隔离工程实现方案。该方案的工程实施结果可实现安全级DCS电气设备和电路的独立性要求,有效提高系统的可靠性,为系统的稳定运行提供重要保证和支持。 相似文献
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依据相关标准的要求,本文就核电站安全级DCS系统网络所需遵循的安全性和可靠性两大基本设计准则进行分析,主要以一个典型的安全级DCS网络架构为基础,结合可靠性定性分析方法,着重对其冗余性和独立性设计原则进行了深入分析研究,说明了工程上安全级DCS系统网络的可靠性设计的具体实现方法。另外,本文从纵深防御角度分析了在整体DCS系统的可靠性设计中如何考虑安全级DCS网络的影响,本文还就所谈及的典型安全级DCS网络架构存在优化的可行性进行了探讨。 相似文献
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邓震宇 《自动化与仪器仪表》2011,(1):59-60
随着化工行业的迅速发展和自动化水平的逐步提高,分散型控制系统(DCS)已在国内各个化工厂中得到广泛的应用。DCS系统能够完成各装置的基本过程控制、操作、监视、管理,同时还可完成顺序控制、工艺连锁和部分先进控制等功能。DCS合理、可靠的系统接地,是DCS系统非常重要的一个环节,为了确保DCS系统监测和控制等功能安全、精确的运行,必须对系统的接地要求、接地方式、接地电缆和接地汇总板布置等方面进行详细的设计和合理的统筹规划。本文根据DCS系统的相关设计标准和规范要求,对DCS接地系统进行简要的介绍和讨论,以供在今后DCS系统安装、维护过程中进行参考。 相似文献
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为保证可靠性,有效克服单一故障和共因故障影响,核电站安全级数字化保护系统设计过程中必须充分考虑系统多样性和纵深防御设计,并有效实现安全功能分散、优化单站负荷及接口。本文论述了核电站安全级数字化保护系统的结构、功能,并依据相关标准要求给出了核电站安全级数字化保护系统的功能分配原则和方法,同时结合一种典型的数字化保护系统功能分配做了分析。 相似文献
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核电站数字化仪控系统(Digital Control System,简称DCS)是核电站的信息神经和控制中枢,对于保证核电站安全、可靠、稳定和经济运行以及提升生产管理水平都起着至关重要的作用。但长期以来这一关键系统却被国外供应商垄断,这种现状不符合国家推进核电设备国产化的战略要求,为此实现核电站数字化仪控系统设备国产化和设计自主化迫在眉睫。本文作者从核电站非安全级数字化仪控系统国产化及自主化工作实践的基础上,对核电站非安全级仪控系统设备国产化、设计自主化的过程进行了相关的探讨和介绍。 相似文献
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《电子制作.电脑维护与应用》2019,(6)
本文我们阐述了当前CPR1000 DCS数字化的压水堆,核电站为了能够提升系统的自动化运行水平,我们采用DCS的控制系统引入核电站中。本文我们主要阐述了当前核电站安全级别DCS系统的相关设计,在设计过程中需要遵循安全性,多样性原则,能够为其他核电站DCS系统设计提供参考依据。 相似文献
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S. Shaw 《Journal of Computer Assisted Learning》1993,9(2):93-99
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. 相似文献
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European Community policy and the market 总被引:1,自引:0,他引:1
C. Lloyd 《Journal of Computer Assisted Learning》1993,9(2):86-91
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. 相似文献
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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。 相似文献
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Wayne O’Brien Author Vitae 《Journal of Systems and Software》2008,81(11):1997-2013
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. 相似文献
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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. 相似文献
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潘丽 《自动化与仪器仪表》2014,(7):80-82
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。 相似文献
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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 相似文献
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张涛 《计算机测量与控制》2015,23(1):86-89
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. 相似文献
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Jacob Palme 《Software》1979,9(9):741-747
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. 相似文献