虚拟的

With amalgamation of Virtual Reality and CSCW techniques, the concept of Virtual Environment is put forward.

虚拟现实技术与CSCW技术相融合，产生了虚拟环境的概念。

A kind of virtual tasting perception system of artificial fish in Intelligent Virtual Environment is proposed in this paper.

本文设计了在智能虚拟环境下人工鱼的一种虚拟味觉系统。

To solve this problem, based on the concept of graph theory we give a few models and arithmetic designs of virtual backbone in the environment of different application, and propose the corresponding routing mechanism with these virtual backbones. The major achievements are outlined as follows:The state of host's power or the time of host's online plays an important role in keeping stability of a virtual backbone. With a view to this feature, the paper introduces a simple and efficient heuristic algorithm for calculating the virtual backbone by seeking a minimum connected dominating set with maximal weight. The maximality of the weight-based choice of backbone nodes guarantees that the most suitable nodes have been chosen for the role of backbone nodes so that they can properly coordinate all the other nodes and keep stability of the virtual backbone in the network.

为了解决这个问题，本文利用网络图论中的一些理论，在不同的应用环境下给出几种虚拟骨干网的模型、构建及基于稳定性和节能的算法设计，并针对这些骨干网提出相应的分层路由机制，主要研究内容和贡献如下：考虑到主机的功率大小和在线时间长短对虚拟骨干中心的相对稳固性的影响，提出用基于极大权的最小连通支配集模拟虚拟骨干网；并给出其数学模型和相应的启发式算法，确保了性能强的主机担任骨干节点；通过优化规则确保骨干网的极小性，有效地减小了控制分组转发开销；最后进行了仿真验证。

The synthesis scheme we developed can deal with changes in visibility, produce perspectively correct views and handle the distortion around the circumferences in the synthesized views. In our scheme, the area without corresponding points was first determined by using Fourier transformation in order to deal with distortion problem, within the mutual overlapped area the z-buffer values of matched key points were computed so that the visibility in novel views can be handle correctly, lastly the common points in new views are rendered through epipolar geometry constraint.

算法的步骤为：利用傅立叶变换方法确定相邻源图像无对应点的区域；然后，利用尺度空间和相位一致原理在共同区域提取及匹配边缘上的关键点，计算其深度值，并在新图像中由该值判别虚拟图像中的可见性；再由关键点恢复极线约束，通过极线间的位置和颜色插值生成虚拟图像中有对应区域的一般点；在确定极线位于无对应点区域段后，利用加权平均或放大插值的方法实现了源图像无对应点区域在虚拟图像中的自然过渡。

One point to be particularly mentioned is that besides the invaluable significance on man, there is still some negative effect. So we should standardize the development of virtual activity from its purposiveness、regularty and their dialectical unity ,and make it develop into a free and overall development activity style .

虚拟活动在给我们带来巨大价值意义的同时，也给我们带来了一定的负面影响，所以我们要从合目的性、合规律性以及二者的辩证统一关系来合理规范人的虚拟活动的发展，让虚拟活动真正发展成为人类自由自在的全面发展的活动形式。

On the basis of Earth surface space using reference ellipsoid as height basis, map space using Gauss-Kruger projection plane as height basis, a viewpoint is proposed that map projection actually establishes corresponding relationship between the height bases of two different spaces above. From the viewpoint of projection and visible representation, the relationships among earth surface space, RS imagery space and map space are analyzed; the differences among different representations of earth surface space are identified theoretically; virtual reality is applied to the representation of land surface space, and a prototype of real 3D virtual reality system based on spatial information is developed. By means of digital simulation, virtual reality representation of land surface space in visual image space is realized.

在以参考椭球面为高程基准面表征地表空间、以高斯-克吕格地图平面为高程基准面表征地图空间的思想基础上，提出了地图投影实质上是建立两个空间的高程基准面之间关系的观点；从投影和可视表达的角度，分析了地表空间、遥感图像空间、地图空间之间的关系，从理论上区分了对地表空间的不同表达方式之间存在的差别；将虚拟现实技术应用于地表空间的表达，研制了空间信息三维虚拟现实系统原型，利用数字模拟技术在视像空间实现了对地表空间的真三维虚拟现实表达。

From point of view of the model requirement in the design process of VP, the characteristics of an integrated VP model are given. Based on the Analyzable Product Model theory developed by Tamburini and Engineering Data Model theory developed by Eastman, the formal description of integrated model of VP is developed, and the application wrapper and the interface components are also designed.

本章中从虚拟样机设计过程中对模型的需求出发，提出虚拟样机一体化模型应该具有的功能特点；在Tamburini的可分析产品模型理论和Eastman的工程数据模型理论的基础上，提出虚拟样机一体化模型的形式化描述体系；接着对一体化模型的应用包装器和接口组建进行设计。

On the one hand, virtual environment has enriched and expanded the content of realistic environment, broadened the connotation of environment, and offered new field for creativity-oriented education; On the other hand, it has adjusted the subject-object relation, changed space-time idea, initiated the contradiction between virtuality and reality, thus caused the lose of autonomy and satisfied in inveracious creative activities.

虚拟环境一方面丰富和发展了现实环境的内容，拓宽了环境的内涵，为创造教育提供了新的领域；另一方面，虚拟环境调整了主客体的关系，改变了时空观念，引发了虚拟与现实的矛盾，从而导致自主性的丧失、满足于虚假的创造性活动。

The development of virtual product has changed people's work style and life style, made people's work and life more diversified, virtual product is love by more and more people, what come along with are the great business opportunities and some longsighted businessmen's attention, which make the online trading of virtual product come into being.

虚拟产品的发展，改变了人们的工作和生活方式，使人们的工作生活更加多元化，虚拟产品得到越来越多人的喜爱，随之而来的巨大商机和眼光长远商人们的关注使得虚拟产品的网上交易应运而生。

It is meaningful how to use information technology means (including multimedia, network, and virtual reality) for training, and keep going on to study the cases of dealing with burst out affairs and turn over fear, making of hammer-harden of learner synthesis diathesis.

本论文从武警部队初级指挥学院教育训练的现状出发，指出目前武警初级指挥院校在运用信息化手段进行教育训练方面存在的不足，在以建构主义学习理论为代表的先进的教育学习理论指导下，运用分布式虚拟现实技术、Agent技术和知识管理技术，依托武警初级指挥院校现有的良好网络基础设施，设计一个面向武警初级指挥学员综合知识学习与指挥能力培养的分布式虚拟训练系统，并进行原型设计与实现，目的是为初级指挥员综合指挥培训创设虚拟训练平台，作为实训教学的有效补充。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。