周口市气象局网络实时监控系统的设计与实现

随着网络技术的迅猛发展,对网络运行状态的实时监控显得十分重要。通过综合分析我局整个网络拓扑结构,开发了基于delphi语言环境的实时网络监控系统,介绍了该系统的实现必要性、功能、设计原理和实现流程。投入业务应用的实践表明,该系统实用性强,对网络系统实时监控效果很好,大大提高了网络的有效性和可靠性。     

浅谈博州气象局网络实时监控系统的设计

随着网络技术的迅猛发展,对网络运行状态的实时监控显得十分重要。通过综合分析我局整个网络拓扑结构,开发了基于delphi语言环境的实时网络监控系统,介绍了该系统的实现必要性、功能、设计原理和实现流程。投入业务应用的实践表明,该系统实用性强,对网络系统实时监控效果很好,大大提高了网络的有效性和可靠性。     

基于无线混合网络的变电站辅助设备智能监控系统的设计

智能二次信息综合管理系统需要依托现有网络信息,实现消防安全互联、环境监控、视频监控等多种智能设施。结合用户的业务和健康管理,对变更后的设备(站)的不同运行数据、图像、外部安全防范措施和环境参数进行监控,可实时全面了解。了解用工运行情况,及时解决局部漏洞,完成电力系统智能开发建设。     

省级气象网络安全设计

随着计算机网络技术的发展,省级气象网络结构越来越复杂,网络安全问题也日渐突出。文章深入分析了省级气象网络安全存在的缺陷和隐患点,并从物理环境、设备和网络三方面阐述了了省级气象部门网络安全的设计策略,为省级气象业务系统稳定运行提供坚实的支撑。     

CATV网络实时监控管理系统的设计与实现

有线电视网络管理系统能适应CATV网络多任务管理的需要，提高整个网络的运行效益，减轻网台管理维护人员的劳动强度。本文介绍了CATV网络实时监控管理系统的硬件组成和系统特点，阐述了CATV、网络实时监控管理系统中监控软件的设计思想、系统功能、各类视图的设计与实现以及监控参数的实时控制实现等。     

移动通信业务综合管理系统的设计

根据邮电部的有关技术规范要求以及移动通信服务的特点,设计了面向省级移动通信系统的计算机综合管理网络（移动通信业务综合管理系统）,详细介绍了该系统的网络结构。数据流程和功能组成。     

煤矿电力监控系统的研究与应用

文章详细介绍了KJ36A型煤矿电力监控系统的3层网络结构形式,即综合监控信息管理层、信息处理与监控层、现场控制层,并分析了这3层网络所实现的功能,阐述了KJ36A型煤矿电力监控系统的功能与特点。该系统采用嵌入式技术、分布式网络技术,可对煤矿供电系统实施一体化的实时监控,实现矿井电网的安全运行及变电所的无人值守功能。实际应用表明,该系统运行效果好,完全满足当前矿井安全生产和管理的要求。     

经编机远程监控系统的数据采集与处理

针对现代工业监控的地理位置分散、布线成本高,对数据实时性要求较高的问题,结合3G网络和传统工业监控终端设备,提出了一套经编机监控系统解决方案,通过VPN虚拟专网实现现场设备与中心服务器之间的无线通讯,能够实时远程获取经编机的工况、运行数据以及故障诊断等功能。详细介绍了监控系统软件如何通过3G网络进行数据采集与处理的设计与实现过程。实验结果表明:实时数据采集正常,系统运行状态良好,为现代传统工业实现网络化管理,具有一定的应用推广价值。     

证券公司集中监控系统设计

证券市场是完整的市场体系的重要组成部分，对整个经济的运行具有重要影响.证券交易系统的安全稳定运行是证券业界非常关注的课题.本文设计一个可以快速实时响应、灵活监控证券公司各个交易系统的网络连通和业务功能运行情况的监控系统（RSCMS），以提高部门的实时监控效率，并为系统的运行情况提供数据评估的依据.本文研究了监控系统关键技术的解决方法，并提供了在证券公司运行的成功案例     

基于组态软件的电力负荷监控系统的设计

为做好电力负荷管理,实现科学用电,本文提出一种在组态软件开发平台下配电监控系统,实现电力负荷参数实时采集及控制系统。利用工控机、电能仪表、485总线等设备构成硬件系统,利用工业组态软件平台开发监控系统软件,设计了配电所微机监控集散控制系统功能,实现了电力负荷参数记录、实时监控、超限报警、负荷历史曲线、报表、事件查询等功能,对用电单位做好负荷控制,提高电力运行的经济性、电力的综合管理水平等方面发挥了重要的作用。     

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.     

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.     

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.     

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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