略论虚拟现实技术

本文首先介绍虚拟现实的概念及其特点，然后介绍了它的关键技术，并对虚拟现实技术的应用和市场状况进行了概述。     

虚拟现实技术及其应用探讨

介绍了虚拟现实技术及其内涵,综述了虚拟现实技术及其国内外在一些特殊领域的研究状况,并提出了目前存在的主要问题;分别说明了虚拟现实技术在医疗、建筑等许多不同领域的综合应用以及发展趋势,指出了虚拟现实技术的发展,将带来巨大的效益。     

虚拟现实技术概述与发展趋势

虚拟现实技术是一门综合的技术,研究内容涉及多个领域,应用十分广泛,本文将从虚拟现实的概念出发．对虚拟现实系统的特征和应用进行了充分的阐述,并对虚拟现实的研究现状做出了详细的论述,预测了虚拟现实的发展趋势。     

虚拟现实技术及其应用研究

虚拟现实技术是二十世纪末才兴起的一门崭新的综合性信息技术，本文总结了虚拟现实技术的发展和应用．介绍了虚拟现实技术的分类，并结合具体工程实例重点介绍了桌面虚拟现实技术。     

虚拟现实技术在实验教学中的应用

虚拟现实技术是实验教学中最具有优势和发展潜力的一项技术，其深度应用将推动实验教学模式的改变。本文总结了虚拟现实技术的基本特征并根据高枝实验教学的现状，探讨了虚拟现实技术在工科和文科方面的应用，对如何利用虚拟现实技术加强、促进实验教学进行了分析和展望。     

虚拟现实技术—回顾与展望

虚拟现实技术是一种有效地模拟人在自然环境中视、听、动等行为的高级人机交互技术。它是人工智能、计算机图形学、人机接口技术、多媒体技术、网络技术、并行计算技术等多种技术的集成。目前已在科学可视化、飞行模拟、医学、遥感与遥控、ＣＡＤ／ＣＡＭ、教育、娱乐等领域获得广泛的应用。而且随着虚拟现实技术的不断发展,必将展示出更加广阔的应用前景。因而,介绍虚拟现实技术的研究与发展状况,让更多的人了解虚拟现实技术,对推动虚拟现实技术在我国的研究和应用具有极为重要的意义。     

虚拟现实技术及其在现代医学中的应用

虚拟现实是近年来发展起来的一项新的技术,它已经被广泛地应用于许多领域,特别是在医学领域．本文在简述虚拟现实技术的基础上,从虚拟人、辅助诊断和手术、虚拟手术模拟以及虚拟的远程医疗系统四个方面介绍了虚拟现实在医学上的应用．     

基于虚拟现实的临场感遥控作业系统的研究动向

本文阐述了虚拟现实技术在临场感遥控作业系统中的研究和应用背景、状况和 内容．综述了临场感遥控作业虚拟现实系统的最近进展．重点介绍了它在监控和协作控制、 劣质视觉反馈的遥作及具有通信时延的遥作方面的研究动向．指出临场感遥控作业虚拟现实 系统是今后临场感技术研究和发展的主潮流,并对我国今后在这方面的研究应遵循的基本原 则提出了建议．     

虚拟现实技术一回顾与展望

虚拟现实技术是一种有效地模拟人在自然环境中视、听、动等行为的高级人机交互技术。它是人工智能、计算机图形学、人机接口技术、多媒体技术、网络技术、并行计算技术等多种技术的集成。目前已在科学可视化、行模拟、医学、遥感与遥控、CAD／CAM、教育、娱乐等领域获得广泛的应用。而且随着虚拟现实技术的不断发展,必将展示出更加广阔的应用前景。因而,介绍虚拟现实技术的研究与发展状况,让更多的人了解虚拟现实技术,对推动虚拟现实技术在我国的研究和应用具有极为重要的意义。     

虚拟现实技术应用于现代教育技术探析

虚拟现实技术对提高学校的教育质量与教师的教学水平具有十分重要的作用.分析现实教育技术的发展趋势,阐述虚拟现实技术的概况,研究了虚拟现实技术在现代教育中的具体应用和影响.     

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.     

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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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