查询词典 virtual

To aim at the differences in the ingredients which should be considered when different cooperative partners are chosen in virtual supply chain, the evaluation index system of upstream cooperative partner, downstream cooperative partner and logistics enterprise in networked virtual supply chain are established. Based on the differences of constructive technologies of traditional supply chain, the cooperative partner selection mode of networked virtual supply chain is established. The application of AHP in cooperative partner selection of virtual supply chain is researched. The dynamic construction mechanism of networked virtual supply chain is put forward to deal with all kinds of exceptions in the supply chain execution.

之后，针对在选择虚拟供应链上的不同合作伙伴过程中考虑因素的不同，分别建立了网络化制造环境下虚拟供应链上游合作伙伴的评价指标体系、下游合作伙伴的评价指标体系和物流企业的评价指标体系；比较分析了传统供应链的组建技术，建立了网络化虚拟供应链的合作伙伴选择过程模型，并具体研究了层次分析法在虚拟供应链合作伙伴选择中的应用；提出了网络化虚拟供应链的动态组建机制，以应对虚拟供应链运行过程出现的各种例外情况。

In order to apply virtual reality technique into medical image processing, make convenient for surgeons to access virtual and mini invasive surgery, this paper, presents a full interactive virtual endoscopy system framework, analyzing and discussing system architecture and algorithm models. We explain some key procedures in virtual endoscopy system such as definition of world coordinate, virtual camera, surface detection, normal approximation, volume rendering and surface rendering, and also some interactive control method.

在综合利用各种计算机图形、图象技术的基础上，提出了完整的交互式虚拟内窥镜系统的框架，同时对系统结构和各种模型进行了分析和讨论，还针对系统的实时性和绘制结果的逼真性要求，提出了基于 Object Cache和扩展的区域增长方法，并将其应用到医学图象处理当中，得到了较好的效果。

Classroom Deployment 4.1 Equipment In order to use the world to deliver a lecture the following items of equipment are required: Desktop/Laptop positioned at the front of the classroom Data projector/LCD Panel/Plasma Panel connected to the above Desktop/Laptop (to provide lecturer with view of 'virtual students') 50 Plasma Panel (to provide lecturer with view of 'virtual students') connected to the above Speakers ( to enable lecturer and students in physical classroom to hear 'virtual students' ) Microphone ( to enable 'virtual students' to hear lecturer and students in physical classroom) Axis 212 PTZ Network Camera ( to provide live video of lecture in virtual classroom) 4.2 Layout The equipment in the classroom should be positioned as shown by Fig.

4课堂部署 4.1设备为了利用世界各地发表演讲下列项目所需的设备：台式电脑/笔记型电脑定位在前面的课堂数据投影机/ LCD屏/等离子面板连接到上述台式电脑/笔记型电脑（提供讲师与鉴于'虚拟学生） 50 等离子面板（与提供讲师认为'虚拟学生的）连接到上述发言者（以使教师和学生在体育课堂上听到'虚拟学生）麦克风（使'虚拟学生听到教师和学生在体育课堂）轴212云台网络摄像机（提供视频直播的演讲中虚拟教室） 4.2布局该设备在课堂上应定位为所表现出图。

It is the change that virtual technology gives birth to a great influence on the human's cognitive activities. First of all, virtual technology has caused obvious change of cognitive relation between subject and object, which includes the change of interaction between subject and object, digitization of cognitive resonance and scene of cognitive model, etc. secondly, virtual technology has improved the subject's cognitive ability and level: the ability of esthesia of the subject has been strengthened, the change of the cognitive structure and the way to obtain information of the subject has been caused and the regulation and control ability of the subject has been improved by virtual technology. Initiative and creativity has been highlighted in the cognitive activity. Lastly, virtual technology has expanded subject's cognitive field, that is to say it has expanded the cognitive space of the subject, and enriched the cognitive source of the subject The appearance of virtual technology leads to great changes of mankind's practices.

正是这种转向使得虚拟技术对于人类的认识活动产生了重大影响：首先，虚拟技术导致了主客体之间的认识关系发生明显的变化，主要包括主客体作用的方式的变化、认识中介的数字化以及认知模型的情景化等；虚拟技术提高了主体认识能力和水平：虚拟技术增强了主体的感知能力，引起了主体认识结构的变化，认识主体获取信息的方式发生了变革，提高了主体对认识活动的调控能力，张扬了主体在认识活动中的能动性与创造性；虚拟技术拓展了主体的认识领域，即它扩展了主体的认识空间、丰富了主体的认识来源。

This article take the personality learning to combine with the virtual learning community,attempt to study the virtual learning community which is a new thing ideal condition that this new things to offers ideal fictitiously for the middle school student's personality learning,further more,this article put forward a strategy about structuring a virtual learning community which based on the personality learning for middle school student,at last,the article analyze the virtual learning community about the basic education founded by The Capital Normal University,it has a strong effective on the field virtual learning community.

本文将个性化学习与虚拟学习社区相结合，试图通过探索虚拟学习社区这一新生事物为中学生的个性化学习提供的理想条件，进而提出关于构建一个基于个性化学习的中学生虚拟学习社区的有效设计策略，最后深入分析当前比较有影响的首都师范大学关于基础教育方面的虚拟学习社区，提出其中的优点和不足。

Secondly, the paper is expanded from follow three aspects: the virtual design, the virtual process and the product data managementduring the developing the torque converter. Applying the key technique of concurrent engineering---design for function, design for assemblyand design for manufactureof the method of design for "X", the virtual design of the torque converter is accomplished in CATIA V5. Then the model constitution and the simulation of virtual process of the torque converter is done in CATIA V5, including the model constitution and the simulation of 5-aixe NC virtual process of the vane, the model constitution（material:PVC） of the idler pulley rapid prototypingand the virtual assembly and the motion simulation of the torque converter, etc. 3-D data exchange between various CAD systems is realized by using STEP standard. The lever of classing the character model of the torque converter is given. And the access authorization is set up and given to manage the partners' reading/writing the product data.

应用并行工程的关键技术之一——面向产品全生命周期的设计DFX中面向功能的设计DFF、面向装配的设计DFA和面向制造的设计DFM的方法，在CATIA V5中完成液力变矩器虚拟设计；在CATIA V5中对液力变矩器进行虚拟加工建模和仿真，包括液力变矩器导轮叶片五轴数控加工刀轨建模与仿真、导轮快速成型RP建模、液力变矩器虚拟装配和运动仿真等；采用STEP标准实现多CAD系统之间三维数据交换，提出液力变矩器特征模型的分级标准并对三维模型数据进行分级管理，制定相应的权限等级以规范合作厂家的产品数据管理层次。

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。

It is the part of the WWW Virtual Library. It provides so many links through which you can directly go to the related Virtual Library of diverse profession, such as The WWW Virtual Library of Cell Biology, The WWW Virtual Library: Model Organisms, The WWW Virtual Library:Parasitology, and The WWW Virtual Library: Mycology etc.

该网站是万维网虚拟图书馆的一部分，提供了许多链接，你可以通过这些链接直接到达不同专业的相关虚拟图书馆，例如：细胞生物学虚拟图书馆、模式生物学虚拟图书馆、寄生虫学虚拟图书馆和真菌学虚拟图书馆等。

Multi-Axis interpolation NC program simulation system was constructed by compiling virtual machine,virtual machine controller,virtual stock,virtual tool,virtual coordinate and virtual clips.Contrasting experiments between virtual and real cutting process were carried out and Muti-axis interpolation cutting simulation based on NC code was achieved.

通过建立虚拟机床、虚拟机床控制器、虚拟毛坯、虚拟刀具、坐标系以及虚拟夹具等，建立了多轴数控程序仿真环境，实现了基于NC代码的多轴联动切削过程的几何仿真，并通过切削对比试验验证了该仿真系统的可行性。

It will expose the design problem of maintainability of civil airplane to the early stage of design. This paper discusses the composing of the virtual maintenance environment, builds non-immersion virtual maintenance environment of undercarriage, and establishes a part library management system. The characteristic of maintainability models and maintainability analysis based on virtual technique is researched to give the maintainability frame model of civil airplane virtual maintainability analysis. All levels of maintenance time model and maintenance man-hour model are established. Analog-Huffman code is proposed to optimize space partition method in traditional collision detection arithmetic."Maintenance therblig"is brought into the broken down of maintenance tasks, and the new maintenance tasks broken down method is proposed. The demands of human measure, position, and equipment layout in human engineering are discussed, and the verification methods of human measure, position and equipment layout in virtual maintenance are given. Basic principle and verification procedure of maintainability virtual verification is developed primarily, and the reachablity, the visibility, and posture-comfortability are verified.

本文论述了虚拟维修环境的组成，构建了某型飞机主起落架非沉浸式虚拟维修环境，建立了维修对象的零件库管理系统；研究了基于虚拟技术的维修性模型特点及维修性分析流程，给出了基于虚拟技术的民机维修性分析框架模型，并结合传统维修性模型，建立了各级维修时间模型和维修工时模型；提出类HUFFMAN编码，结合人因工程的要求，优化了传统碰撞检测算法中的空间分割法，使之适用于柔体；在维修性分解中引入"维修动素"，给出了与CATIA、DELMIA等应用软件结合紧密的维修任务分解方法；论述了人因工程中对人体尺寸、姿势、设备布局的要求，给出了虚拟维修中人体尺寸、姿势分析、民机内设备布局的验证方法；初步制订了维修性虚拟验证的基本原则和验证程序，并结合具体实例对可达性、可视性、干涉性以及人体姿态舒适性进行了验证，较清晰、真实地反映了维修人员的维修状态。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。