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0 前言 上世纪九十年代走向实用化的现场总线控制系统,正以迅猛的势头快速发展,是目前世界上最新型的控制系统。现场总线控制系统是目前自动化技术中的一个热点,正受到国内外自动化设备制造商与用户越来越强烈的关注。现场总线控制系统的出现,将给自动化领域带来又一次革命,其深度和广度将超过历史的任何一次,从而开创自动化的新纪元。  相似文献   

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介绍了目前国内200MW以下机组的设备情况、控制系统特点、CCS的各个部分的方案设计,并阐述了CCS机炉主控的设计原理。同时针对实际工程中的一些常见问题作以说明。  相似文献   

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本文针对大豆分离蛋白生产工艺及要求,设计了一套以ControlNet为主的包括罗克韦尔自动化NetLinx三层网络的现场总线控制系统。系统包括罗克韦尔自动化公司A-B品牌的4个ControlLogix机架、EtherNet、ControlNet、DeviceNet通信模块、多个I/O模块、多个变频器和软启动器以及两个操作站等。系统居国内大豆精深加工行业技术的领先地位,达到了国际先进水平,使企业的生产水平及产品质量和国外著名企业形成同等竞争优势,为企业带来了巨大的经济效益。  相似文献   

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全面地分析了惰性气体控制系统(IGS)的各种故障,研究了解决方法,为广大船员正确使用该设备,在该设备出现故障时,快速准确地解决问题提供了宝贵的经验。对保护油船安全有着十分重要的意义。  相似文献   

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针对循环流化床锅炉的工艺特点和控制需求,开发了基于TDCS9200-DCS系统的循环流化床锅炉控制系统。该文详细介绍了该控制系统的技术方案和系统特点。该系统实现了锅炉的自动控制,试运行结果表明,达到了规定的设计性能指标并能满足工艺要求。  相似文献   

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王萍 《自动化信息》2006,(8):65-66,30
本文结合35t/h锅炉控制系统改造项目,介绍了霍尼韦尔公司的R150集散控制系统的应用,从该系统的软件和硬件两方面阐述了设计思路和控制方案。  相似文献   

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杨欢 《自动化信息》2007,(5):77-78,84
本文分析了传统桥式切石机电气控制系统的缺点,介绍了采用变频器和PLC对原切石机电气控制系统进行改造的技术方案,并详细描述了一个新型的控制系统实例。  相似文献   

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ABB电机厂产量翻番,新品发布,目标直指降低能耗 (2005年4月25日,中国上海)ABB,全球领先的电力和自动化技术供应商,日前在上海发布了其全系列高效能防爆电机产品,该产品可以极大帮助用户节约能耗,同时减少二氧化碳的排放量。  相似文献   

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介绍了非线性PID调节器的一般理论,给出了非线性PID调节器控制在分布式控制系统DCS中的实现方法,经过实际的现场应用表明,非线性PID调节器明显优于常规PID调节器,取得了比较好的应用效果。  相似文献   

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设计了时延网络的预测控制算法,采用支持向量机对延时网络进行有效辨识,并加以广义预测控制,起到了良好的控制效果。  相似文献   

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This article describes the rationale for the multiphase creative problem solving process, and reports the findings from an empirical investigation conducted to facilitate the problem solving of managers. The ideational skills of the managers were assessed before and after training in a complete process of creative problem solving, along with their ideational attitudes, creative problem solving style (i.e., generator, conceptualizer, optimizer, or implementor), and evaluative skill (i.e., ability to recognize original ideas). The most important findings indicated that the training had a significant impact on the evaluative accuracy of the managers. They were significantly more accurate in their judgments about original ideas after training, both in their identification of original ideas and their recognition of unoriginal ideas. After training, the managers also gave more solutions and more original solutions to problems. Finally, several variables (e.g., the “preference for active divergence” attitude, and the conceptualizer process style) seemed to moderate the impact of training. Training was therefore effective, with specific effects that can be predicted from pre-training individual differences in attitudes and process style.  相似文献   

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为提高高等院校的管理水平和决策水平,充分利用校园网资 源,开发了高等院校行政财政分析与决策系统。解决了诸如数据的动态查询、自动生成报表 、网络环境下数据共享等技术问题,具有网上数据共享、图形界面友好和安全的保密措施等 特点。  相似文献   

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A new method of stochastic model reduction has recently been introduced by Desai et al. [1], [2]. The stability of the reduced order model has not previously, been considered. In this paper, we show that the stability of the reduced order model follows directly from the results of Pernebo and Silverman [3]. It is also shown that the reduced order model is minimal, in the controllability/observability sense. The relevance of this notion of minimality to stochastic minimality is made clear.  相似文献   

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The deep connection between the Burrows–Wheeler transform (BWT) and the so-called rank and select data structures for symbol sequences is the basis of most successful approaches to compressed text indexing. Rank of a symbol at a given position equals the number of times the symbol appears in the corresponding prefix of the sequence. Select is the inverse, retrieving the positions of the symbol occurrences. It has been shown that improvements to rank/select algorithms, in combination with the BWT, turn into improved compressed text indexes.  相似文献   

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