共查询到19条相似文献,搜索用时 156 毫秒
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本文主要阐述了我国信息安全保护的通用原则,核电DCS(集散控制)设备厂家在DCS设备设计和制造过程中应该遵守这些通用原则。随着网络信息安全越来越重要,核电DCS设备还必须通过软件防范措施和硬件物理防范措施来进一步保证核电DCS系统信息的安全,并通过信息安全测试验证确保信息安全措施的有效性,最后描述了信息安全的几种前沿技术和未来发展方向。通过探讨核电DCS系统的信息安全保护的措施可以给电力或者其他行业信息安全保护的方案提供初步参考,在此基础上DCS供应商结合自己软件和硬件平台的特点可以增加专项信息安全保护措施。 相似文献
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在核电厂安全级DCS系统工程设计阶段,通过人工检查难以发现保护算法逻辑、人因错误等组态问题,设计人员也很难评估及分析算法的动态特性,而连接设备调试效率很低,且不支持暂停、回退、跳转等功能,一旦发现问题缺乏快速有效的定位手段。因此核安全级DCS中增加针对保护算法的离线调试工具是解决问题的有效手段。本文基于我国首个具有自主知识产权的核安全级数字化控制保护系统平台——和睦系统, 在满足核电标准要求的基础上实现了一种可应用于核安全级分布式控制系统(DCS)保护算法的离线调试工具。该工具大幅提高了核安全级保护算法的设计周期和测试效率,并为现场调试和故障定位提供了快速而有效的维护手段,目前已应用于阳江核电站、红沿河核电站等多个核电DCS项目中。 相似文献
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胡文正 《核电子学与探测技术》2016,(7):722-725
非安全级DCS最小系统作为一种多功能平台具有广泛的应用前景。对DCS最小系统的研究与开发过程进行阐述,对最小DCS系统的功能需求、设计思路、系统结构等进行分析和探讨,并对DCS最小系统的应用效果进行了总结。经测试与应用证明,所设计系统达到预期目标,较好满足了核电厂的生产需求。 相似文献
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为了在不同的国产化中央处理器(CPU)上应用Modbus/TCP协议,需设计并实现跨平台协议库函数。根据Modbus应用协议规格说明书,在不依赖操作系统调用的前提下,对Modbus/TCP协议需支持的十大功能码进行跨平台库函数开发。库函数可被通讯应用层根据自身需求用于Modbus/TCP协议客户端和服务器端的设计和开发。经过在国产化CPU和嵌入式平台上进行二次开发,开发者调用本研究中的库函数能有效实现通过Modbus/TCP协议对反应堆冷却剂系统的稳压器压力水位及棒控棒位系统的功率调节进行数据采集。 相似文献
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简要回顾了奥运会期间的辐射安全保障工作,总结了成功经验和存在问题,结合国家相关法规,对进一步做好北京辐射安全监管工作提出建议。 相似文献
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Xiaodan Zhang Chundong Hu Peng Sheng Yuanzhe Zhao Deyun Wu Qinglong Cui Rui Zhang Yulian Lin 《Journal of Fusion Energy》2014,33(2):125-129
The neutral beam injection (NBI) heating is one of the mainly auxiliary plasma heating methods for EAST. In this paper, a data server application software is presented for NBI control system. This application software is developed on Centos OS by C programming language with TCP and multithreading technology. It mainly focuses on storing and querying experimental pulse data and engineering data; experimental user’s operation records; experimental configuration information; the collected data after processing; as well as managing and releasing experimental discharge shot number and so on. By using the unified data header structure, the data server software provides universal information exchange interfaces for different service request terminals with different operating platform, such as WinCC, Labview. With the help of data server software, those problems related on the storage, querying and processing of information and data for NBI control system are well solved. 相似文献
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设计了一种基于网络读出的多通道时间测量控制系统。该系统基于FPGA实现1 Gigabit以太网TCP服务端关键协议的逻辑设计,用于系统时间测量数据的高速传输,对于当前TOF时间测量电子学系统读出具有借鉴意义。通过对本时间测量系统进行性能分析和网络传输测试,实验结果表明:系统单通道时间测量精度好于22 ps,该1 Gigabit以太网TCP逻辑设计传输性能可达600 Mbps。 相似文献
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To ensure the uniqueness and recognition of data and make it easy to analyze and process the data of all subsystems of the neutral beam injector (NBI), it is required that all subsystems have a unified system time. In this paper, the timing synchronization software is presented which is related to many kinds of technologies, such as shared memory, multithreading, TCP protocol and so on. Shared memory helps the server save the information of clients and system time, multithreading can deal with different clients with different threads, the server works under Linux operating system, the client works under Linux operating system and Windows operating system. With the help of this design, synchronization of all subsystems can be achieved in less than one second, and this accuracy is enough for the NBI system and the reliability of data is thus ensured. 相似文献
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《Fusion Engineering and Design》2014,89(5):780-783
The Java tool jScope has been widely used for years to display acquired waveform in MDSplus. The choice of the Java programming language for its implementation has been successful for several reasons among which the fact that Java supports a multiplatform environment and it is well suited for graphics and the management of network communication. jScope can be used both as a local and remote application. In the latter case, data are acquired via TCP/IP communication using the mdsip protocol. Exporting data in this way however introduces several security problems due to the necessity of opening firewall holes for the user ports. For this reason, and also due to the fact that JavaScript is becoming a widely used language for web applications, a new tool written in JavaScript and called WebScope has been developed for the visualization of MDSplus data in web browsers.Data communication is now achieved via http protocol using Asynchronous JavaScript and XML (AJAX) technology. At the server side, data access is carried out by a Python module that interacts with the web server via Web Server Gateway Interface (WSGI).When a data item, described by an MDSplus expression, is requested by the web browser for visualization, it is returned as a binary message and then handled by callback JavaScript functions activated by the web browser.Scalable Vector Graphics (SVG) technology is used to handle graphics within the web browser and to carry out the same interactive data visualization provided by jScope. In addition to mouse events, touch events are supported to provide interactivity also on touch screens. In this way, waveforms can be displayed and manipulated on tablet and smartphone devices. 相似文献
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SSE-CMM可用于过程改进、能力评估和提高用户的信任度,是组织和实施安全工程的通用方法,是系统安全工程领域成熟的方法体系。SSE-CMM结合了计算机科学中的CMM模型、管理学中的全面质量管理思想和统计理论,将系统安全工程转换为一个具有良好定义的、成熟的、可测量的先进工程学科。SSE-CMM评估面临领域知识缺乏、数据量大、证据类型多样、过程繁琐、证据与问题匹配复杂等问题。为有效提高评估效率,本文依据本体论、证据理论、语义网、智能信息检索、智能自动匹配等技术和方法,针对乏燃料后处理系统,设计了一种基于领域本体的智能评估软件系统,主要包括领域本体建模和管理、证据自动收集、问题和证据自动匹配、过程评估等4个子系统,技术体系结构分为数据层、本体层、知识层、服务层、表示层5层。 相似文献
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将网络和通信技术引入数字辐射成像无损检测系统,建立一个基于TCP/IP协议的网络结构,采用Client/Server的通信模型,实现射线无损检测系统的网络控制和实时无程图像传输。 相似文献
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为了准确描述从1E子网流入非1E级子网的核电站网络的信息流动,本文给出了一个基于核电站网络安全的新的信息流模型。该模型引入了将子网密级和客体密级相结合的二维密级函数的概念,利用该函数值来划分安全类,用两个客体的函数值定义信息流策略。经过严格的数学证明,新的信息流模型合理且安全,能较好反映核电站网络的安全要求。 相似文献