化工企业自动化仪表的设计探讨

良好的化工企业自动化仪表设计可以优化自动化仪表的使用性能，提高其适应性。简要介绍了化工企业自动化仪表及其设计原则和仪表分类，阐述了化工企业自动化仪表的基本设计理念。     

实时数据库在企业信息化中的应用

在化工企业信息化的过程中,越来越多的企业认识到,实时数据库在企业的信息整合、企业管理等方面起着重要的作用。文中介绍了目前化工企业数据库的应用情况,并以四川煤气化项目为例,介绍霍尼韦尔PHD的系统组成、结构和功能。采用此系统,可以实现企业生产数据和管理数据保持同步性和一致性,实现企业管理网络和生产过程网络的有效融合,大大提高了企业的生产效率和管理水平。     

化工企业网络安全面临的威胁及防御措施探讨

随着计算机技术的快速发展和进步,化工企业已经在化工生产、办公管理等方面实现了全面的网络化和自动化,有效地改善了化工企业的信息共享程度,大大地提高了化工企业生产效率和工作质量。但是随着网络的普及,其带来极大工作方便的同时,也带来了潜在的威胁,因此提高化工企业网络安全的防御能力已刻不容缓。基于本人多年的网络安全的了解,详细地介绍了网络安全面临的威胁,同时采用积极的防御措施,从管理制度、防御技术等方面阐述了加强网络安全防御的措施。     

化工企业安全生产故障预警仿真系统

介绍了化工企业生产的特点和事故的特征,阐述了预防化工企业生产事故的技术手段,化工企业安全生产故障预警仿真系统是解决化工企业安全生产的一种有效手段。     

化工企业安全教育系统的设计与实现

化工企业的安全生产是至关重要的,而生产过程中事故的发生往往和人的不安全行为紧密相关,因此对职工的日常安全教育工作格外重要。基于对化工企业日常安全教育工作的考察,研究了化工企业安全培训工作中的信息化方法,并设计开发了石化企业安全教育系统,提供面向职工的安全信息培训、考核、管理方法,结合多媒体、虚拟现实等技术提高了教育的真实感和参与度。该系统基于B/S模式开发,使用.net框架和各种Web技术完成了3层架构的可扩展系统,并利用JavaScript脚本实现了网页内的虚拟现实场景交互试题。目前该系统已在某化工企业成功运行,其使用已成为部门绩效考核的一部分。     

基于RFID的中小化工企业仓储系统设计

针对目前中小化工企业仓储管理的现状,分析了化工企业RFID应用的必要性.设计了基于无线射频识别(RFID)技术的仓储管理系统,对硬件进行配置,同时开发了相应的上位软件,完成了对标签的读写操作,并实现了对产品入库、出库、移库、盘点等整个流程的操作.由此证明了方案在实验阶段的可行性,并对其在化工行业应用的前景进行了展望.     

计算机在化工企业自动化仪表系统中的应用探析

工业经济在不断的发展进步,信息现代化技术也在不断的完善,工业企业生产发展要跟上时代的步伐就必须在企业中引进现代信息技术。化工企业的自动化仪表系统在开发及运用中采用计算机信息技术,这就表明化工企业已向生产自动化、信息化转变,这对推动化工企业的生产水平以及获得更大的经济效益有着积极而且深远的意义。     

基于MRP—Ⅱ的化工企业网络经营管理系统

化工企业网络管理系统ＣＮＭＳ是基于ＭＲＰ－Ⅱ的一种新型的企业内部网络管理信息系统，本文论述了三个方面的内容；化工企业内部的数据流向及关系；化工企业网络管理系统的设计；化工企业网络经营管理系统的实现。     

化工信息化潜力大

在2000年中国化工行业大企业信息网年会暨信息化推进会上,对参会百余家大型化工企业的信息化现状调查发现:75％的大型化工企业已在Internet上开通了企业站     

事故处理仿真培训系统在化工企业的应用研究

根究化工企业的特点设计开发了一套事故处理仿真培训系统,该系统运用数据挖掘技术,可以从海量数据中提取出隐含的有价值的信息,从而可以化工故障进行分析处理。对事故仿真培训系统架构进行介绍,提出了该系统在化工企业中的应用方案。     

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)

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