LAN总线暖通空调智能控制系统通过鉴定

由北京自动化系统成套工程公司和北京工业大学联合研制开发的LAN网络技术及神经元芯片的开发和应用一LAN总线暖通空调智能控制系统于近日通过产品设计技术鉴定。LAN总线暖通空调智能控制系统是采用国际上最新的现场总线。网络技术和神经元芯片,主要应用于智能大厦暖通空?..     

LON控制网络与信息网络集成的远程监控系统

当今,网络技术、信息技术的飞速发展,引起了工业控制领域的深刻变革.基于现场智能设备(LON节点)的现场总线技术正是这一变革中的重要技术.现场总线技术把网络化、信息化的概念彻底引入到控制领域,构建完整的控制网络和信息网络,实现微机化测量设备之间双向串行、多节点数字通信.目前,基于LON节点的现场总线技术已成为当今世界各国关注的热点课题.同时,现场总线技术给网络控制系统集成提供了强大的硬件和软件支持,为实现多级递阶智能控制提供了广阔的应用基础.     

任重道远 开拓创新——访中国PROFIBUS用户组织(CPO)主席唐济扬先生

现场总线技术是近几十年来自动化领域最热门的话题之一。从上世纪八十年代开始,美国仪表协会（ISA）和国际电工委员会（IEC）就设立了专门的机构来研究和提出现场总线技术标准。由于种种原因,经过长达十多年的努力,终于在2000年颁布了现场总线国际标准IEC61158,然而这却是份让所有自动化领域相关人员感到困惑和尴尬的标准,因为它包含八种互不兼容的总线协议。随着IT技术不断向工业领域渗透,工业以太网和无线技术作为新的工业网络技术让很多人充满了期望。到底出路在何方？国内企业该如何实现自主开发创新,提高自身竞争力？     

基于MIP固件实现Neuron芯片的快速并行通信

随着控制、计算机、通信、网络等技术的发展,信息交换沟通的领域正在迅速覆盖从工厂的现场设备层到控制管理的各个层次。现场总线就是顺应这一形式发展起来的新技术。现场总线是当今自动化领域技术发展的热点之一,被誉为自动化领域的计算机局域网。LonWorks总线就是由美国Echelon公司推出的一种现场总线技术,在楼宇自动化、办公自动化、智能家电等领域都有广泛的应用。但是现     

Cones-L2000现场控制系统在原油罐区工程中的应用

主要论述了Cones-L2000现场控制系统在原油罐区工程中所满足的技术要求，系统配置、系统分析及实施效果。     

Maxicom智能家居系统典型解决方案

一、系统特点Maxicom智能家居采用现场分布式总线技术TP-Bus。TP-Bus是一种电源/信号混合传输技术,同时也是是一种家庭自动化网络总线技术,该总线技术主要用于网络化控制系统,如智能家居网络、住宅小区网络等。该总线技术采用24V直流电源,信号传输速率为10kbps,以双绞线作为传输媒体,像这种传输速率的双绞线很容易实现,总线的双绞线结构使网络既可作数据传输,也可以作为电能的供应。TP-Bus是一种智能控制总线,在欧洲标准EIB总线及LonWorks总线技术上作了创造性的改进,其防通信冲撞协议的设计很好的解决了总线上各节点收发指令的冲撞…     

基于LONWORKS的现场总线控制系统SMART 2000

现场总线是连接智能现场设备和自动化系统的数字式、双向传输多分支结构的通信网络,是自动化控制系统的发展方向。本文试图对自动化仪表的发展过程及现场总线技术的研究情况进行回顾和比较,并介绍用LONWORKS技术开发的基于LWN智能节点的SMART2000系统的设计方案及其应用。     

现场总线技术的进展与展望

现场总线是工业中用于现场仪表和控制室系统之间的一种全数字化、双向、多站的通信系统,是过程控制技术、自动化仪表技术、、计算机网络技术三大技术发展的交汇点,将带来控制系统的三大变革。本文对现场总线技术进行了简要概述,主要讲述了特点和、现状１及进展,并阐述了现场总线技术的最新研究领域及未来研究课题。     

工控领域最流行的九大现场总线

0引言 现场总线（Fieldbus）是20世纪80年代末、90年代初国际上发展形成的,用于现场总线技术过程自动化、制造自动化、楼字自动化等领域的现场智能设备互连通讯网络。它作为工厂数亨通信网络的基础,沟通了生产过程现场及控制设备之间及其与更高控制管理层次之间的联系。它不仅是一个基层网络,而且还足一种开放式、新型全分布控制系统。这项以智能传感、控制、计算机、数字通讯等技术为主要内容的综合技术,已经受到世界范围的关注,成为自动化技术发展的热点,并将导致自动化系统结构与设备的深刻变革。国际上许多实力、有影响的公司都先后在不同程度上进行了现场总线技术与产品的开发。现场总线设备的工作环境处于过程设备的底层,作为工厂设备级基础通讯网络,要求具有协议简单、容错能力强、安全性好、成本低的特点：具有一定的时间确定性和较高的实时性要求,还具有网络负载稳定,多数为短帧传送、信息交换频繁等特点。由于上述特点,现场总线系统从网络结构到通讯技术．都具有不同上层高速数据通信网的特色。     

小型FCS的设计与应用

FODCS与FOPLC在平板玻璃水平辊道式钢化机组的控制中实现了联合应用，取得了较理想的控制效果。此次应用涉及了自动化领域中最活跃的新技术：现场总线技术和现场总线系统（FCS），从某一角度验证了FCS开放性所带来的益处。★ 概述 (1) FODCS 是北京和利时系统工程股份有限公司在HS2000的基础上研制开发的新一代DCS。该系统采用现场总线技术，主要面向中小规模的过程控制场合。其技术特点主要有：· 系统硬件继承了HS2000 DCS硬件的优点，安全可靠；· 系统软件Focsoft 1.0/2.0为HS2000软件的升级版；· 系统上层网络（系统网…     

煤矿井下安全监控分站的设计及其仿真实现

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.     

Call for Papers The 6^th International Conference on Grid and Cooperative Computing

Recent years have seen rapid advances in various grid-related technologies, middleware, and applications. The GCC conference has become one of the largest scientific events worldwide in grid and cooperative computing. The 6th international conference on grid and cooperative computing (GCC2007) Sponsored by China Computer Federation (CCF),Institute of Computing Technology, Chinese Academy of Sciences (ICT) and Xinjiang University ,and in Cooperation with IEEE Computer Soceity ,is to be held from August 16 to 18, 2007 in Urumchi, Xinjiang, China.     

View-based model-driven architecture for enhancing maintainability of data access services

In modern service-oriented architectures, database access is done by a special type of services, the so-called data access services (DAS). Though, particularly in data-intensive applications, using and developing DAS are very common today, the link between the DAS and their implementation, e.g. a layer of data access objects (DAOs) encapsulating the database queries, still is not sufficiently elaborated, yet. As a result, as the number of DAS grows, finding the desired DAS for reuse and/or associated documentation can become an impossible task. In this paper we focus on bridging this gap between the DAS and their implementation by presenting a view-based, model-driven data access architecture (VMDA) managing models of the DAS, DAOs and database queries in a queryable manner. Our models support tailored views of different stakeholders and are scalable with all types of DAS implementations. In this paper we show that our view-based and model driven architecture approach can enhance software development productivity and maintainability by improving DAS documentation. Moreover, our VMDA opens a wide range of applications such as evaluating DAS usage for DAS performance optimization. Furthermore, we provide tool support and illustrate the applicability of our VMDA in a large-scale case study. Finally, we quantitatively prove that our approach performs with acceptable response times.     

A pragmatic multi-method investigation of discrepant technological events: Coping,attributions, and ‘accidental’ learning

Discrepant technological events or situations that entail a problem, a misunderstanding or a difficulty with the Information Technology (IT) being employed, are common in the workplace, and can lead to frustration and avoidance behaviors. Little is known, however, about how individuals cope with these events. This paper examines these events by using a multi-method pragmatic approach informed by coping theory. The results of two studies – a critical incident study and an experiment – serve to build and test, respectively, a theoretical model that posits that individuals use a variety of strategies when dealing with these events: they experience negative emotions, make external attributions, and adopt engagement coping strategies directed at solving the event, eventually switching to a disengagement coping strategy when they feel they have no control over the situation. Furthermore, users’ efforts may result in ‘accidental’ learning as they try to overcome the discrepant IT events through engagement coping. The paper ends with a discussion of the results in light of existing literature, future opportunities for research, and implications for practice.     

The Distributed Time-Triggered Simulation Scheme: Core Principles and Supporting Execution Engine

Distributed real-time simulation is a young technology field but its practice is under increasing demands. In recent years the author and his collaborators have been establishing a new approach called the distributed time-triggered simulation (DTS) scheme which is conceptually simple and easy to use but widely applicable. The concept was initiated in the course of developing a new-generation object-oriented real-time programming scheme called the time-triggered message-triggered object (TMO) programming scheme. Some fundamental issues inherent in distributed real-time simulation that were learned during recent experimental studies are discussed along with some approaches for resolving the issues. An execution engine developed to support both the TMOs engaged in control computation and the TMOs engaged in DTS is also discussed along with its possible extensions that will enable significantly larger-scale DTSs.     

Software-Konfigurationsmanagement in großen Softwareprojekten

Zusammenfassung Mit zunehmender Größe der Softwaresysteme verschärfen sich die für die Software-Herstellung typischen Probleme: Beherrschen großer Objektmengen, Erhalten der Systemkonsistenz, Kontrolle der ständigen Änderungseinflüsse und Gewährleisten einer langen Lebensdauer. Die Disziplin Konfigurationsmanagement bildet den methodischen Ansatz, diese Probleme besser zu beherrschen. Software-Konfigurationsmanagement faßt die Herstellung von Softwaresystemen als eine Abfolge von kontrollierten Änderungen an gesicherten Zwischen- und Endergebnissen auf. Dargestellt werden die Objekte und Funktionen des Software-Konfigurationsmanagements sowie die hierfür in großen Software-Projekten benötigten Methoden, Instanzen und Hilfsmittel.     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and     

Editorial:Brain-machine interface(BMI) and cyborg intelligence

正Brain-machine interfaces(BMIs)aim at building a direct communication pathway between the brain and an external device,and represent an area of research where significant progress has been made during the past decade.Based on BMIs,mind information can be read out by neural signals to control     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and overseas to the world’s scientific circles,especially to stimulate     

SCIENCE CHINA Information Sciences SUBJECT INDEX TO VOLUME 57(2014)

正~~