基于虚拟原型技术的虚拟网络实验室

随着现代信息技术的发展,构建虚拟网络实验中心成为研究网络技术的重要手段.本文分析了虚拟网络实验室的架构,并阐述了网络实验软件系统体系结构,在此基础上,提出了基于ns的虚拟实验室的实现,促进网络研究的发展.     

基于虚拟原型技术的虚拟网络实验室

建立虚拟网络实验室,是当前网络研究与设计的先进方法。该文将虚拟原型技术应用到网络的学习和研究中,给出了虚拟网络实验室的架构及网络实验软件系统体系结构。最后,演示了一个实例,说明数据如何传送到以太网的用户。     

基于网络虚拟仪器实验室的构建

对虚拟实验室系统的实施方案进行了研究,提出并建立了基于网络的虚拟实验室框架模型,以NI的LabVIEW7.1为软件开发工具,设计并开发出一系列虚拟仪器,并使用HTML编程语言把虚拟仪器制作成网页向外界发布,支持远程网络实验,并设计了虚拟实验室网站,系统采用B/S体系结构,用户可以在网络上随时随地访问虚拟实验室.     

高校网络虚拟实验室特点与建设

高校网络虚拟实验室是现代教学中新的教学方式,具有交互性、可视性、沉浸性,具有高仿真效果。本文首先对网络虚拟实验室进行了概述,然后对高校网络虚拟实验室的特点和建设进行了简要介绍,最后提出加强网络虚拟实验室建设的几点建议。     

基于Web的协同虚拟实验室性能分析

自治性、交互性、及时性、协作性和分布性是衡量基于Web的协同虚拟实验室性能的重要指标.在分析虚拟实验室特点的基础上,将协同虚拟实验室看成一个特殊的网络,应用相关的网络分析方法对协同虚拟实验室的重要性能指标--响应时间的及时性进行分析,该指标的分析有利于进一步提高虚拟实验室的使用效率,为更好地研究虚拟实验室的协同性提供一定的参考借鉴作用.     

基于Web ActiveX数据控件的网络虚拟实验室构建

随着虚拟现实技术的不断发展,网络虚拟实验室得到了广泛的应用。在介绍网络虚拟实验室、Web、ActiveX等关键技术的基础上,提出基于Web ActiveX数据控件的网络虚拟实验室构建方法。基于Web ActiveX数据控件的网络虚拟实验室能够跨应用程序、跨平台、跨网络运行,解决系统数据通用性差,实验过程中用户与系统的交互性差等问题。     

支持计算机协同操作的虚拟实验室的研究开发

该文对虚拟实验室、计算机支持的协同工作(CSCW)进行一些简述。提出了研究开发基于网络协同工作的虚拟实验室的一种新视野和新思路。开发实现了一个具有协同工作能力的虚拟实验室系统。首先该系统是一个虚拟实验室系统，具有虚拟实验室的基本功能，如虚拟元器件、可视化输入、可视化输出、可视化模型等；其次它是一个网络环境下的协同工作系统，具有不同实验者之间协作完成同一实验的功能。     

结构化综合布线虚拟实验室的设计与研究

文章针对结构化综合布线实验教学需要,研究实现了结构化综合布线虚拟实验平台。根据海南师范大学的具体应用环境和虚拟实验室的要求,利用三维虚拟建模、网络虚拟交互、数据优化等关键技术,构建了一个基于Internet的交互式虚拟实验室系统。     

基于校园网的虚拟实验室的研究与设计

随着虚拟现实技术和校园网络的发展,以及高校对实践教学的重视,使建立虚拟实验室成为可能。本文介绍了网络虚拟实验室的定义、系统结构,并对当前实现网络虚拟实验室的几种主流技术进行了比较和概括。     

基于角色访问机制的网络测试实验室组建

网络虚拟实验室提高了教学仪器的使用效率,是国内外研究的热点之一.在虚拟仪器先进测试实验平台的基础上,基于网络组建了虚拟实验室,实现了测试实验平台的远程共享.为了保证信息的安全性,采用角色访问控制机制,实现了实验者的授权管理,弥补了传统网络实验室缺乏信息安全管理的不足.实践结果表明,网络实验室权限管理安全,运行良好.     

基于Web的三维虚拟分子实验室的设计与实现

提出一种基于Web的三维虚拟分子实验室模型,分析了该实验室的特点和它应该具备的主要功能,以及实现虚拟分子实验室所涉及到的关键技术。论述了利用Virtools实现基于Web的三维虚拟分子实验室的原理和技术,最后通过一个实例证明了该实验室具有良好的交互性、可扩展性。     

一种基于CORBA/EJB的虚拟实验室架构关键技术研究

实验是大部分工程类和应用类课程的重要一环,基于Internet的虚拟实验室是现代远程教学质量提高的关键。该文提出了一种基于CORBA/EJB技术的网上虚拟实验系统的开发模型,重点介绍了如何利用CORBA/EJB技术构建虚拟实验室系统平台,并对系统中采用的关键技术进行了详细的说明。     

控制系统网络虚拟实验室方案设计

该文介绍了一种基于Java Applet及Matlab／Simulink构建网络虚拟实验室的方法,该方法采用客户／服务器模式。在浏览器上运行Java Applet客户程序构成虚拟实验室的操作界面。利用WEB服务器、专用服务器(VLab Server)及Matlab/Simulink构成强大的信息服务和实验对象仿真平台。该文提供了一个实现该方法的具体实例。     

A web-based platform for virtual screening

A fully integrated, web-based, virtual screening platform has been developed to allow rapid virtual screening of large numbers of compounds. ORACLE is used to store information at all stages of the process. The system includes a large database of historical compounds from high throughput screenings (HTS) chemical suppliers, ATLAS, containing over 3.1 million unique compounds with their associated physiochemical properties (ClogP, MW, etc.). The database can be screened using a web-based interface to produce compound subsets for virtual screening or virtual library (VL) enumeration. In order to carry out the latter task within ORACLE a reaction data cartridge has been developed. Virtual libraries can be enumerated rapidly using the web-based interface to the cartridge. The compound subsets can be seamlessly submitted for virtual screening experiments, and the results can be viewed via another web-based interface allowing ad hoc querying of the virtual screening data stored in ORACLE.     

A domain-oriented end-user design environment for generating interactive 3D virtual chemistry experiments

Three-dimensional virtual worlds are potentially feasible for building virtual educational environments. However, educators face technical challenges to apply these technologies because creating virtual educational environments based on virtual worlds demands 3D modeling and programming skills. This paper proposes a method to lower the technical barriers through domain-oriented interfaces with languages and environments that are familiar to educators. A domain-oriented end-user design environment, iVirtualWorld, is designed and developed to implement the proposed method in a specific educational domain, namely introductory chemistry experiments. This web-based environment provides end-users with domain-oriented building blocks, which can be assembled to create 3D virtual chemistry experiments. A usability evaluation and a comparative case study are designed to evaluate the system among chemistry educators, who are the target audience. The usability evaluation contains a task requiring participants to create a 3D virtual chemistry experiment and a voluntary semi-structured interview. The case study compares a virtual experiment generated using iVirtualWorld with an experiment in a commercial virtual chemistry laboratory system. The results show that 1) the domain-oriented end-user design environment enables participants to generate the 3D virtual chemistry experiment within 30 min; 2) participants gain confidence on creating 3D virtual experiments by themselves using iVirtualWorld; 3) participants confirm the usefulness of applying the system in introductory chemistry education; and 4) iVirtualWorld is considered more intuitive and straightforward for students to focus on finishing the experiment without being distracted than the commercial virtual chemistry laboratory system. Areas that can benefit from the system most and areas where the system is less effective are identified by participants. The responses also reveal the limitations of the current system and suggest directions for future improvement.     

基于Web的空间虚拟实验室计算机模拟系统

空间虚拟实验室建设对促进空间物理研究具有重要的意义。计算机数值模拟系统是其中一个非常关键的子系统,将卫星和地面观测以及理论分析紧密结合。基于Web的空间虚拟实验室模拟系统屏蔽了传统空间物理数值模拟过程的复杂性,以Web的形式提供了空间物理模拟中所需的主要功能,使得模拟工作可以通过浏览器实现。本文结合武汉大学空间数据和计算中心(SDCC)基于Web的空间虚拟实验室模拟系统的建设情况,根据当前国际动态和科学研究的需要,给出了具体的设计与实现。     

面向虚拟装配的VRML模型优化重构

对基于Web的虚拟装配中VRML模型优化重构进行了研究.提出了虚拟装配环境中的五层结构信息模型;在此基础上,分析VRML模型的语法结构和语法解析过程,建立了节点重构算法和优化处理算法;实现了VRML模型组织结构和信息描述的优化重构,很好地满足了虚拟装配快速设计与分析的需求.开发了基于Web的交互式虚拟装配原型系统,验证了模型优化重构算法的可行性.     

基于MVC设计模式和Flash组件技术构建物理化学网络虚拟实验室工作站的报告

在深入研究高校物理化学实验室中常用工作站的基础上,采用MVC设计模式和Flash组件技术构建了一系列应用于物理化学网络虚拟实验室的化学工作站软件。使用者可以通过该系列软件完成数据的采集、处理以及数据曲线的绘制。对于化学工作站的操作培训和物理化学实验操作的网络学习具有较大的应用价值。     

Sharing and constructing perspectives in web-based conferencing

This study investigates the quality and nature of virtual interaction in a higher education context. The study aims to find out variables that mediate virtual interaction, particularly the emerging processes of sharing and constructing perspectives in web-based conferencing. The purpose of this paper is to report the results on different levels of web-based discussions with parallel findings on the amount of sharing perspectives. The findings of two empirical studies are compared, and thereby also the impact of the pedagogical model designed between these two studies is evaluated. Possible explanations for why some discussions reach higher levels and include more perspective sharing than others are also searched for. Particular attention is paid to the qualitatively distinct ways in which individual students interpret their participation in virtual interaction and the impact of group working on their own learning. These findings lead us on to discuss specific processes by which participants could better understand each other, create joint goals and construct meanings in virtual interaction.     

Cousins Virtual Jane and Virtual Joe,extraordinary virtual helpers

Higher education institutions deliver web-based learning with varied success. The success rate of distributed online courses remains low. Factors such as ineffective course facilitation and insufficient communication contribute to the unfulfilled promises of web-based learning. Students consequently feel unmotivated. Instructor control and in the courseroom further isolates students, whereas success rate increases when students unite in virtual communities. King (2002) increased student participation in his online classes by creating a virtual student, Joe, as a participating student and supplementary facilitator. This investigation responds to King’s call for further directions on how a virtual helper enhances online facilitation. This inspired our investigation of how Virtual Jane might augment online facilitation. King’s prediction, “It seems that Joe Bags may have a family in the future,” (p. 164) became a reality in a South African masters’ web-based class on web-based learning.