保护回车巷历史文化古迹,打造古城邯郸风采

仪表自动化属于自动化在工业生产中仪表的应用,在我国工业自动化的领域占有十分重要的位置。本文对仪表的设计化设计及施工服务中需要注意的问题进行简单的分析,分析了仪表设计、采购和施工、运行等阶段的要求等,仅供参考。     

仪表自动化设计及施工服务应注意的问题分析

仪表自动化属于自动化在工业生产中仪表的应用,在我国工业自动化的领域占有十分重要的位置。本文对仪表的设计化设计及施工服务中需要注意的问题进行简单的分析,分析了仪表设计、采购和施工、运行等阶段的要求等,仅供参考。     

核电站建设阶段堆外核测仪表典型故障诊断与质量管控

本文结合国内核电站建设阶段堆外核仪表系统（RPN）典型故障诊断,分析核仪表故障根本原因,并且阐述了核电站建设阶段核仪表系统全过程质量管控措施。本文对同类型核电站在核仪表设计、制造、调试、维修等方面的工作具有一定经验反馈价值。     

计算机控制系统的回路图设计法

一、引言通常,计算机或集散控制系统的工程设计主要是根据厂家提供的设计语言或功能块、功能码等来进行组态,同时作出相应的功能框图以供施工与存档。然而,功能框图只表达了计算机系统或集散系统内部功能软连接方式,它与外部设备及其它自动化仪表的功能连接多数只能由仪表的系统图来表示。因此,在计算机系统与其接口或端子之外的仪表等外设之间总存在一段软、硬件系统图都未能表达清楚的"带沟",特别是当仪表系统与计算机系统设计不同步时,这段"带沟"就     

仪表设计、研制、试生产阶段可靠性设计程序

本文通过对可靠性设计程序的介绍,提出了新产品在开发、设计、研制及试生产阶段中需要考虑的一些问题和必须完成的工作,从而提供了一种满足仪表既定可靠性指标的设计方法.     

浅淡两种常用流量仪表的安装缺陷及对策

随着仪表制造技术的发展,仪表的精度、稳定性及可靠性有了很大程度的提高,为确保检测准确性提供硬件保障。但在实际应用中,经常碰到流量仪表检测数据不合理甚至不能正常工作,但单独校验变送器及二次仪表均合格的情况,究其原因往往发现是现场仪表安装不规范造成的。因此,合理安装现场流量仪表,确保检测数据可靠性具有实际意义。１流量仪表安装不规范的现象及成因 一般来说,流量仪表的设计、安装均参照国家规范和具体仪表的安装规定进行的,但在许多情况下,现场条件及工艺情况往往不能满足安装要求,或施工时不按设计要求规范安装仪…     

石油化工自动化仪表施工管理

介绍石油化工企业自动化仪表施工管理程序和施工管理方法,并指出设计、安装、调试要点.     

基于西门子PLC S7-200的液氯自动充装管理系统

利用PLC系统、称重控制仪表、电子平台秤等组成了液氯自动充装管理系统,介绍了PLC系统、称重控制仪表、电子平台秤及其他现场仪表的选型设计及液氯自动充装管理系统运行、使用情况.     

DCS项目工程的实施手段

详细地介绍DCS项目工程中有关系统选型、设计、施工、组态、调试等阶段的特点及方法,从项目施工的角度阐述了DCS项目管理的方法.     

天华大化装置DCS／ESD系统方案研究

介绍了四川天华股份有限公司仪表及工艺技术人员如何依靠自身力量和技术优势，将使用了十多年的大化肥装置DCS／ESD系统在短时间内完成了整体更新换代，并保证了新系统一次开车成功的全过程。对整个技改不同阶段的技术工作做出总结，包括前期组织、资料整理核实、组态方案的确定、施工方案的细化等方面。     

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.