DCS仿真系统在循环流化床干法脱硫中的开发

如今循环流化床干法脱硫都是采用DCS对现场设备进行监控.利用DCS组态软件本身功能开发的循环流化床干法脱硫DCS仿真系统,操作界面和参数变化与实际项目一致,可用于操作培训、故障培训、运行分析、模拟实验等.     

DCS控制系统的安全评价方法

介绍DCS控制系统安全评价的定义、目的,分析常用的安全评价方法,并总结出一套DCS控制系统安全评价的组合方法.     

催化重整装置仿真培训系统的开发

以30万吨/年催化重整装置为对象,研制开发了生产装置全流程、全工况操作的DCS仿真培训系统.该文介绍了系统结构和各部分的功能;同时,结合实例说明了建立包括正常操作、开工和停工的动态仿真培训数学模型的过程,采用机理和经验相结合的方法,既逼真地反映了实际生产过程运行情况,又满足了仿真培训系统的实时要求,为操作人员的培训发挥了重要作用.     

Honeywell PKS系统在冷轧厂空压站中的应用

介绍了ExperionPKS控制系统在宝钢第五冷轧厂空压站中的应用。主要对硬件配置、网络构架、组态工具等方面进行了介绍。该系统的使用不仅为操作人员和仪表维护人员带来极大便利,而且提高了自动化控制水平,有效地保障了生产的稳定性。     

PCS7系统在铂重整装置上的应用

利用SIEMENS公司的PCS7 PLC系统取代一些中小DCS控制系统,可以在保证系统稳定性、可靠性的前提下,达到节约投资、简化系统的目的.介绍了PCS7 PLC控制系统在炼油厂铂重整装置上的应用,为控制系统改造,开拓了一条新的方法与途径.现场工业运行表明,用PCS7 PLC控制系统取代DCS控制系统取得了良好的控制效果.     

一种新型精细化工过程仿真操作培训系统的开发

精细化工过程工艺复杂、操作繁琐,对操作人员的操作技能要求高,但用实际生产装置培训操作人员受到很多限制,需要开发仿真操作培训系统来培训操作人员。而现有的仿真培训系统开发方法不易做到模块化、通用化,开发不方便,因此需要研究新的更高效的仿真系统开发方法。使用通用监控和数据采集组态软件(Supervisory Control and Data Acquisition,简称SCADA)作为图形用户界面开发平台,综合应用机理建模法和动态补偿建模法建立过程动态模型,提出了一种新的基于通用监控和数据采集组态软件(SCADA)过程仿真系统开发模式。通过设计一种动态链接库函数,经过组态软件的数据库把动态模型计算程序和图形用户界面相连,成功地实现了过程仿真培训系统的集成,开发了一种SCADA模式精细化工生产过程仿真培训系统,其组成更加模块化,开发方法更加通用化,更易开发。一套精细化工生产装置的仿真培训实践表明,该仿真培训系统操作运行效果生动逼真,能较好地满足生产操作培训需要,改善了操作培训效果,提高了操作培训效率。     

基于现场总线技术的水泥生产线控制系统

文章介绍了一种将集散计算机控制系(DCS)与可编程控制器fPLC)融合为一体的过程自动化与信息管理自动化相结合的新型综合集散控制系统--水泥生产过程控制系统.水泥生产线工作环境恶劣、自动化程度不高,严重影响操作人员的健康,同时给操作带来困难.因此设计一套智能监控系统十分必要.结合水泥生产线实时监控系统,介绍了系统的硬件结构设计以及各个部分的软件设计.     

基于虚拟现实的反渗透仿真培训系统研究

针对反渗透海水淡化装置专业技术人员培训周期长、业务针对性差、误操作风险高等问题,集成了HLA/RTI作为分布式仿真支撑工具、虚拟场景生成和绘制工具作为渲染引擎、沉浸式交互设备作为人机接口等关键技术,开发了反渗透海水淡化装置虚拟样机和交互式支撑环境,构建了“过程工艺模型+DCS控制仿真+三维虚拟操作环境”的海水淡化技能培训系统。该系统采用虚拟现实技术直观地揭示了海水淡化真实的工艺原理、操作流程、故障处理方法,可对海水淡化操作和维护人员进行有针对性、自主性和安全性的培训,结合虚拟培训设施,避免了传统培训风险,获得了专业知识和实际经验,并多次用于商务部组织的发展中国家海水淡化管理研修班的培训,具有很好的应用推广价值。     

浅谈如何提高电厂DCS控制系统的可靠性

DCS控制系统是电厂不可缺少的重要组成部分,尤其是对于中小型电厂而言,其控制系统的可靠性对整个电厂的安全和经济运行起着重要的作用。本文从人员管理和培训、DCS控制系统选型、设备安装、程序设计和调试验收等方面对如何提高整个DCS控制系统的可靠性展开了探讨。     

基于BP网络的武器系统使用可用性仿真研究

使用可用性（Ao）是装备完好性的定量度量指标,是将装备的性能转化为任务效能的必要条件,是衡量系统实际战斗力的重要标志.使用可用性仿真是一个复杂的过程仿真,迄今仍然没有一套可操作的仿真模型和算法可实时评估系统和设备的使用可用性.该文利用BP网络、Monte Carlo抽样、离散事件仿真、数理统计、计算机仿真等理论建立了一种可实时仿真系统使用可用性的过程仿真模型,结果表明：此模型可用于全寿命周期定量评价系统或设备的使用可用性,为设计和使用人员提供依据.     

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.