基于虚拟现实技术的电子沙盘仿真系统

该文介绍了虚拟现实系统的特征、分类和软件、硬件结构等相关技术以及基于微机系统开发的虚拟电子沙盘系统。详细描述了虚拟现实技术在电子沙盘中的应用，在虚拟环境下地形的三维显示，人机交互时改变地形观察的方位，角度和距离，沿一路径视模拟，航空照片，卫星照片，扫描图片的三维显示以及跨图幅大范围三维漫游观察的算法处理与实现。     

基于虚拟现实技术的三维河流仿真系统

虚拟现实技术是当今计算机科学研究的一个热点，该文将这一技术应用到三维河流的虚拟仿真系统中，阐述了创建三维河流虚拟仿真系统的三个具体环节：即三维河流的实体建模，模型数据的读取预处理，虚拟场景的渲染实现，以及在各环节中用到的关键技术。     

虚拟现实系统中的视景仿真研究

视景仿真是虚拟现实系统的重要组成部分.文中讨论了建立虚拟现实系统的软硬件条件和视景仿真的建立过程,并给出了优化系统实时性能、减小视觉延迟和虚拟环境导航的办法.这些办法可有效减少系统计算量,优化交互性能.     

基于虚拟现实技术的三维河流仿真系统

虚拟现实技术是当今计算机科学研究的一个热点,该文将这一技术应用到三维河流的虚拟仿真系统中,阐述了创建三维河流虚拟仿真系统的三个具体环节:即三维河流的实体建模,模型数据的读取预处理,虚拟场景的渲染实现,以及在各环节中用到的关键技术。     

虚拟现实系统中的视景仿真研究

视景仿真是虚拟现实系统的重要组成部分。文中讨论了建立虚拟现实系统的软硬件条件和视景仿真的建立过程，并给出了优化系统实时性能、减小视觉延迟和虚拟环境导航的办法。这些办法可有效减少系统计算量，优化交互性能。     

基于虚拟现实的装备维修仿真训练系统研究

虚拟现实（VR）技术应用于装备维修训练，能使操作者通过虚拟仿真训练得到操作真实设备的训练效果，不仅能减少消耗成本，而且不受场地和时间的限制，文中介绍了虚拟装备维修训练的系统的设计思想，总体结构及系统的组成和特点。装备维修是以装备恢复正常功能的目的，虚拟现实技术应用于装备维修训练时，除了需要装备的几何建模和物理特性建模外，必须装备部件间的功能关系进行描述，该文较好地解决了装备维修中存在的问题。     

基于Simu1ink上的虚拟现实环境动态系统仿真

介绍了MATULB中虚拟现实动态系统的开发、运行环境以及虚拟现实工具箱的核心虚拟现实模块，着重介绍了如何利用虚拟现实工具箱在Simulink环境中建立倒立摇控制系统的虚拟现实动态系统仿真的方法，并给出了虚拟现实动态仿真的结果。虚拟现实动态仿真形象逼真，在本地计算机上具有交互性，并在远程计算机上可观察其动态仿真效果。     

基于虚拟现实技术的小轮车仿真训练系统研究

虚拟现实技术是计算机科学与信息科学的交叉与融合,是21世纪信息科学领域最有发展前途的技术。本文介绍了虚拟现实系统的构成、分类、主要特征以及虚拟现实技术的应用,探讨了虚拟现实技术在小轮车的应用前景,提出了小轮车虚拟训练系统的构成方案。     

机械移位系统虚拟现实动态仿真研究

该文介绍了用VRML语言来设计弹簧-质量-阻尼器机械移位系统的各个组成部分,在VRML编辑器V-Realm Builder2．0环境下构成弹簧-质量-阻尼器机械移位系统虚拟现实世界,并在MATLAB环境下利用MATLAB虚拟现实接口及接口函数对虚拟现实世界中的机械移位系统中的参数进行交互式设置,实现虚拟动态系统仿真。设计出来的机械移位系统虚拟动态仿真形象逼真,具有很好的交互性。     

基于Creator/Vega Prime的单件生产系统虚拟现实仿真

为了对一个单件生产系统调度过程进行虚拟现实仿真,文中首先采用多线程方式编写了单件生产系统的实时仿真程序,此程序可仿真各工件在各机器上的调度过程.为了使仿真过程可视化,使用三维建模工具Creator建立了这个单件生产系统的模型,并在VS2003环境下由仿真程序调用Vega Prime工具包对模型进行驱动,最终实现了对单件生产系统调度过程的虚拟现实仿真.从仿真结果来看,可以清晰直观地看到该单件生产系统的工作过程,证明此方法正确、有效,并可以推广到更复杂的生产系统中.     

A PC-based distributed multiple display virtual reality system

In this paper, a PC-based distributed multiple-display virtual reality system is constructed. The system is a PC-based CAVE environment. Five PCs are used in this system; one is the master responsible for receiving user's input signals, the others are clients for images rendering. Devices are added to synchronize the RGB signals from client PCs.

A software library is developed to drive the system properly. The software is designed in object-oriented language and flexibility for different interface devices is considered.

With the proposed system, developers can easily elaborate PC-based virtual reality applications and build PC virtual worlds at much lower cost.     

基于虚拟现实的流程工业过程模拟仿真系统

将虚拟现实技术与系统仿真技术相结合,建立了炼油企业虚拟现实过程模拟仿真平台,分析了仿真平台的结构设计与实现原理。介绍了一种基于虚拟现实的炼油企业过程模拟仿真算法,详细说明了该算法在虚拟现实仿真平台上的应用过程,包括重点装置动态模拟、罐区油品调合仿真、进出厂模拟等。虚拟现实仿真平台通过生产过程与数据的可视化呈现与人机交互以及现场应用,可以为炼油企业流程模拟仿真培训与生产过程三维可视化监控提供有效的支持。     

Development of virtual reality proprioceptive rehabilitation system for stroke patients

In this study, the virtual reality (VR) proprioception rehabilitation system was developed for stroke patients to use proprioception feedback in upper limb rehabilitation by blocking visual feedback. To evaluate its therapeutic effect, 10 stroke patients (onset > 3 month) trained proprioception feedback rehabilitation for one week and visual feedback rehabilitation for another week in random order. Proprioception functions were checked before, a week after, and at the end of training. The results show the click count, error distance and total error distance among proprioception evaluation factors were significantly reduced after proprioception feedback training compared to visual feedback training (respectively, p = 0.005, p = 0.001, and p = 0.007). In addition, subjects were significantly improved in conventional behavioral tests after training. In conclusion, we showed the effectiveness and possible use of the VR to recover the proprioception of stroke patients.     

一种VR/AR红色文化虚拟仿真教育系统设计与实现

为弥补当前高校红色文化资源传播手段和形式的不足,拓展红色文化的覆盖面,加强红色文化与课程思政的深度融合.文章借助3ds Max建模软件和Unity3D开发平台,结合虚拟现实、增强现实关键技术,开发出VR/AR红色文化虚拟仿真教育系统.PC端VR系统实现了沉浸式体验,手机端AR系统使学生能随时观看学习.该系统不仅提高了学...     

交互式虚拟现实系统的实现

对变互式虚拟现实系统的州论与技术进行了研究。理论研究主要针对二维数据存数捌席中的存储、二维坐标的对应算法及虚拟现实交互式技术的应用。存WEB环境下,能够创造一个实时逼真的虚拟现实环境,并将此环境应用于查询等交互式过程。     

An Image-Based Virtual Reality Prototype System

The most important goal of virtual reality is to create a virtual world computers where users are allowed to view the environment and control the virtual objects interactively.Traditionally,virtual reality systems use 3D computer graphics to model and render a virtual environment in real time.However,this approach usually requires laborious modeling and expensive special-purpose rendering hardware.Image-based rendering is a new approach in composing a virtual environment in which a set of panoramic images is used to compose the virtual environment and walking in the space is accomplished by “hopping”to different panoramic points.This paper introduces an experimental image-based VR system.The techniques utilized in the system,in particular the authoring and interactive control tools of the system,are described in detail.     

The concept of strong and weak virtual reality

We approach the virtual reality phenomenon by studying its relationship to set theory. This approach offers a characterization of virtual reality in set theoretic terms, and we investigate the case where this is done using the wellfoundedness property. Our hypothesis is that non-wellfounded sets (so-called hypersets) give rise to a different quality of virtual reality than do familiar wellfounded sets. To elaborate this hypothesis, we describe virtual reality through Sommerhoff’s categories of first- and second-order self-awareness; introduced as necessary conditions for consciousness in terms of higher cognitive functions. We then propose a representation of first- and second-order self-awareness through sets, and assume that these sets, which we call events, originally form a collection of wellfounded sets. Strong virtual reality characterizes virtual reality environments which have the limited capacity to create only events associated with wellfounded sets. In contrast, the logically weaker and more general concept of weak virtual reality characterizes collections of virtual reality mediated events altogether forming an entirety larger than any collection of wellfounded sets. By giving reference to Aczel’s hyperset theory we indicate that this definition is not empty because hypersets encompass wellfounded sets already. Moreover, we argue that weak virtual reality could be realized in human history through continued progress in computer technology. Finally, within a more general framework, we use Baltag’s structural theory of sets (STS) to show that within this hyperset theory Sommerhoff’s first- and second-order self-awareness as well as both concepts of virtual reality admit a consistent mathematical representation. To illustrate our ideas, several examples and heuristic arguments are discussed.

基于虚拟技术的MACS实训室的构建

针对过程控制专业实验实训及工厂培训设备M A C S控制系统价格特别昂贵,培训效果差的状况,提出建立基于虚拟技术的MACS实训室的构想。虚拟MACS实训室采用虚拟仪器技术、虚拟现实技术、计算机网络技术、多媒体技术,将昂贵的工业控制系统扩展到网络化的多媒体教学中,实现了由多人共用一套实训设备到每人单独使用此套实训设备的转变,充分利用了硬件资源,极大地节省了实训设备的投资,提高了教学质量与教学效果。     

From sensory substitute technology to virtual reality research

This paper describes research into sensory substitutes for the disabled, and proposes one basic research approach to assistance technology. It also reports on how the technology is related to virtual reality research.     

基于VEGA PRIME的无人机飞行视景仿真系统的研究

介绍了计算机仿真技术在无人机飞行仿真中的应用,讨论了系统实现的关键技术。利用三维几何模型,动态显示,3D地形LOD算法等技术,并结合C 编程语言构建了一个基于MultiGen Creator/Vega软件的无人机飞行视景仿真系统,得到了满足系统的实时性及真实感的渲染效果。