Development of a Web-Based Control Laboratory for Automation Technicians: The Three-Tank System

This paper introduces a Web-based control laboratory for experimentation on a nonlinear multiple-input-multiple-output (MIMO) system: the three-tank plant. Using this application, automation technician students can learn in a practical way many fundamental aspects of control processes. The client-side of the virtual laboratory has been developed using the programming support provided by Easy Java Simulations (EJS), an open-source tool for teachers with limited programming skills who want to create Java applications and applets. The lab has been integrated in the collaborative Web-based experimentation environment eMersion which provides more flexibility for the students performing the laboratory experiments.     

信息网络运行方式管理系统的设计与开发

依托SNMP与桌面管理系统数据库,建立信息网络运行方式管理系统,规范信息网络的接入行为,提供各种网络设备状态信息的展示、告警、统计、分析和诊断功能,实时检测与控制公司信息网络运行的所有网络设备,简化及方便了信息网络运行与维护管理。文章介绍了信息网络运行方式管理系统的架构设计、功能设计、应用成效及系统开发过程中的各类技术实现过程。     

教育城域网网络管理系统

教育城域网网络管理系统采用SNMP简单网络管理协议,实施配置管理、失效管理、安全管理、性能管理、计费管理.用JAVA程序设计语言实现.     

基于Web的广东省网关口电能计量装置监督管理系统

随着电力体制改革和电力市场化的深入，关口电能计量的监督与管理已成为电网公司的一个重要的课题，为此，开发了基于Web的省网关口电能计量装置监督管理系统。该系统采用分布式浏览器-服务器（B／S）与客户-服务器（C／S）结合的体系结构，应用了Web技术、数据库技术和中间件技术，具有Web模式下的数据实时采集处理、统计分析、信息查询与发布等功能，该系统能进行关口计量装置管理、标准装置管理、计量人员管理、计量器具校验管理、系统管理与维护和综合统计查询管理。实际应用表明：系统安全可靠，效率高，使用简单，扩展维护方便。     

IP网络拓扑结构自动搜索算法的研究与实现

IP网络拓扑结构的自动搜索与构造是实现一个IP网络管理系统的基础，它的目的是为了自动发现IP网络中的所有设备和整个网络的拓扑结构。论文首先简单介绍了SNMP和ICMP协议，然后详细描述了如何利用这两种协议来实现自动搜索算法，并提出了在算法中需要注意的问题。     

利用远程技术加强信息系统设备的运行管理

结合岳阳电业局信息系统设备的运行情况,利用SNMP及第3方软件对信息系统设备进行远程监控和故障告警,以提高对设备运行的管理效率,保证设备的稳定运行。     

Automatic management of laboratory work in mass computer engineering courses

Teaching computer engineering calls for an important practical component, usually covered by setting several laboratory exercises for each course. These exercises are specified as assignments by the teachers and have to be completed by the students. At the Computer Science School of the Technical University of Madrid (UPM), Madrid, Spain, some of these laboratory exercises have to be set for up to 400 students. High-quality laboratory work requires the use of technology to help in student management, interaction, and assessment. Over the last ten years, this department at UPM has been a site for new tool development. Students use these tools to submit their laboratory work over the network. These tools allow the students' work to be checked by a battery of tests proposed by the instructor. In addition, a specific tool has been built to detect plagiarism by students. This work describes the services provided by this environment and the experience gathered during the use of this laboratory.     

SNMP在配电自动化领域的应用和意义

随着配电自动化的快速发展,配电自动化系统通信网络的规模和通信业务日益增加,使得网络管理的难度也大大增加,面对多厂家、多设备型号等特点,要实现网络高效、合理地管理就必须使用统一的网络管理协议进行网络设备的管理及监视,通过SNMP简单网管协议对配电自动化网络性能数据的监测、收集、统计和分析等功能,为配电自动化通信系统运维管理人员进行网络的维护和优化提供依据。     

基于LabVIEW的IP网络管理

介绍了基于SNMP的网络管理系统,分析了基于SNMP协议的网络编程。通过对SNMP协议实现过程中关键技术的讨论,从工程的角度阐明了如何用LabVIEW语言实现一个针对IP网络的管理。最后给出了应用该方法开发的一个实例。     

SNMP网络管理中的安全机制

在计算机网络管理中应用得最广泛的网络管理协议是简单网络管理协议（SNMP，Simple,Network,Management Protocol）。在SNMP网络管理中，安全机制是一个非常重要的内容。论文首先介绍了SNMP网络管理的体系结构模型，然后分别讨论了SNMPv1协议、S-SNMP协议和SNMPv2协议的安全机制的内容及其发展过程。     

局域网络监视系统的开发与实现

本文深入分析SNMP的原理与工作模式,总结MIB库中用于网络性能分析的对象,给出了若干重要的性能参数的计算公式,总结了如何利用SNMP4J、JFreeChart以及一些其他技术实现本系统,重点阐述了实时显示模块、循环采集模块、历史分析模块与报警模块开发实现的要点.描述了如何利用SNMP协议及其他技术实现网络性能监控系统.通过SNMP协议,了解影响网络性能的关键数据,利用SNMP协议采集、分析这些数据,最终完成一个可以采集实时性能数据、分析历史数据的网络性能监控系统的软件.     

基于网络的分布式电器测试技术

本文在嵌入式电器测试装置研制的基础上,提出了基于网络的分布式电器测试技术,开发出具有三层网络架构的电器测试系统.该系统以LabVIEW为测控平台,具有Web化功能,实现了基于网络的电器性能评估与电器产品检测数据在不同检测环节、不同部门之间的资源共享.     

IP网络管理系统的设计与实现

简单网络管理协议(SNMP)是一个通用的网络管理协议。文中利用 SNMP 结合 Internet 控制消息协议(ICMP)研究设计了一个面向 TCP/IP 网络的网络管理系统,分析了系统基于浏览器/服务器(B/S)模式的多层体系结构,研究了拓扑发现、性能监测、状态监视、陷阱(trap)接收、告警处理等关键技术。所实现的 IP 网络管理系统结构合理、功能丰富,能够帮助用户对 IP 网络进行有效的监视和管理。     

电力通信网络管理系统的建设

有效的网络管理是通信行业高效发的必备手段。从当前网络管理需求和技术现状出发,介绍和分析了电力通信网络管理系统的建设目标和体系结构,提出以选择简单网络管理协议（SNMP）和面向对象的技术为佳,未来的网络管理系统应具有人工智能的功能,可分层分范围。     

A Web-Based Remote Access Laboratory Using SCADA

The Internet provides an opportunity for students to access laboratories from outside the campus. This paper presents a Web-based remote access real-time laboratory using SCADA (supervisory control and data acquisition) control. The control of an induction motor is used as an example to demonstrate the effectiveness of this remote laboratory, using real instruments (a two-level inverter, measurement equipment, a magnetic powder brake and an ac/dc converter). A programmable logic controller (PLC) was programmed to control the operation of the system and a SCADA system was installed to monitor and control of the process. Some limitations were placed on the PLC program to protect the motor from overloading and going over maximum speed. The remote laboratory presented here offers an economical solution for multiple users in a laboratory environment. This system allows the students to access real instruments in a real laboratory via the Internet. Additionally, the suggested architecture helps improve students' skills on SCADA systems in use in industry. The Web interface was designed using Visual Studio with ASP.NET, which allows students to access the lab and information about the experiment.      

SNMP网络管理站的分析与实现

首先简单介绍了SNMP协议，然后分析介绍了SNMP的参考模型，网络管理进程中的组件、网络管理站实现的一般流程，最后介绍了WinSNMP API函数的分类和用WinSNMP API实现的网络管理站的一般步骤。     

网络管理协议SNMP与CMIP的分析比较

随着电力通讯网规模的扩大 ,其网络结构也越趋复杂。建立高效的网络管理系统 ,选用何种网络管理协议是关键。对目前流行的两种网络管理协议SNMP与CMIP进行介绍 ,并分别从管理通信、功能、信息、管理模型等方面对两种协议加以分析比较 ,最后指出网络管理协议的发展趋势     

Push技术在基于Web的网络管理中的应用

Push技术作为第三代浏览器的核心技术，是一种客户机/服务器之间的通信方式，它采用了公布/订阅/行结构，因而对其应用非常广泛。基于Web的网络管理系统采纳Push技术后，与传统的请求／响应模式相比，效率高，时延低，并且可以节省带宽和CPU时间。而且，对于告警信息的及时上报有重要意义。文中提出了基于Web的TMN管理实例，并在此基础上探讨了应用Push技术实现告警功能的方法。     

Using Web-Based Teaching Interventions in Computer Science Courses

An open-source management system of Web-based teaching interventions is presented that can be used in general for science curriculum courses and especially for computer science courses. The proposed solution is called System of Teaching Intelligent Interventions (STII) and facilitates the authoring, deployment, and evaluation of Web-based metaphors. This paper discusses the use of metaphors for assisting students to comprehend the substance of cognitive concepts and their basic background. STII has been applied in a particular educational scenario during the learning process of 228 students attending the course ldquocomputer applications.rdquo The presentation of results from a pilot evaluation of two metaphors demonstrates the usefulness of the system. The evaluation focuses on the impact of the two metaphors on student learning, and on detecting potential correlations between metaphors and students' groups. STII evaluation conclusions strongly support that multimedia metaphors can be used as an alternative instructional tool to assist students in confronting their cognitive constraints and developing functional understanding of curriculum courses.     

Distance learning applied to control engineering laboratories

Distance learning is an emerging paradigm where students, teachers, and equipment may be at different geographic locations. At the College of Engineering of Oregon State University, we have developed and demonstrated an innovative real-time remote-access control engineering teaching laboratory. Our remote laboratory uses the Internet to provide complete access to the usual laboratory facilities. In addition, remote power control, network reliability, and safety features are integrated into our experimental hardware and software design. Remotely located students are able to develop, compile, debug, and run controllers in real time on the experiments in our laboratory. Students can watch the experiment in real time from a remote workstation, hear the sounds in the laboratory, and interact with other laboratory users. Students can effectively use the laboratory from anywhere on the Internet