共查询到20条相似文献，搜索用时 171 毫秒
1.
郭筠 《新疆教育学院学报》2006,22(4):113-116
本文主要研究基于VRML的虚拟装配关键技术,包括基于VRML的特征识别与模型重构,基于VRML的装配模型数据结构,虚拟装配过程控制以及基于VRML的碰撞干涉检测枝术。在此基础上,开发了一个基于VRML的交互式虚拟装配平台原型系统。 相似文献
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尧燕 《深圳职业技术学院学报》2013,12(3):8-10
鉴于传统CAD装配的不通用性,以齿轮泵为例,基于VRML技术,通过CAD建模以及数据转换再建虚拟场景,利用VRML的检测器和传感器等技术,结合Java和Java Applet等程序控制技术,建立了一个基于网络的虚拟装配仿真平台． 相似文献
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本文对VRML中交互行为的机理进行了研究,详细阐述了如何通过EAI(外部编程接口)、Script节点来实现基于VRML的虚拟装配中场景与外部世界的交互技术,包括如何实现装配过程中零件碰撞检测、装配顺序判断以及零件实时编辑等功能,并设计了一个二级圆柱齿轮减速器虚拟装配系统进行验证,取得了良好的效果. 相似文献
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提出了基于PC平台的虚拟装配仿真体系结构,探讨了虚拟装配原型系统,探讨了在虚拟装配中VRML场景的控制技术。装配过程中的碰撞检测算法,装配体零件的位姿调整和实时编辑,以及虚拟配环境的立体显示．最后,给出了运行实例,验证了所构建虚拟装配原型系统的可行性． 相似文献
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针对虚拟实验系统对模型状态数据的读写需求,确定了VRML模型状态数据的读写途径和VRML与Java程序的关联方法,实现了使用Java程序通过SAI和EAI方式读写VRML模型状态数据的方法,并给出了一个设计实例。该方法解决了虚拟实验开发中的关键问题。 相似文献
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虚拟现实技术在模具设计教学课程中的应用 总被引：1，自引：0，他引：1
本文主要利用VRML技术将模具设计教学过程中的零件及工具以其3D虚拟形式展现,藉此制作出属于模具设计课程的新型教学课件,通过分析当前模具教学课程的教学现状和在教与学的过程中使用三维虚拟软件技术的优势,从模型设计及学习角度论述了基于VRML技术在模具教学中的应用。 相似文献
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本文主要论述了游戏场景虚拟漫游系统的关键技术,包括场景建模技术、模型优化以及漫游系统的交互设计三方面。最后设计了一个游戏场景,阐述了基于3D Max和VRML的游戏场景虚拟漫游系统的设计过程,该系统具有良好的真实感和交互性。 相似文献
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本文主要论述了游戏场景虚拟漫游系统的关键技术,包括场景建模技术、模型优化以及漫游系统的交互设计三方面。最后设计了一个游戏场景,阐述了基于3DMax和VRML的游戏场景虚拟漫游系统的设计过程,该系统具有良好的真实感和交互性。 相似文献
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针对传统虚拟测量实验的不足,将VC与VRML相结合,用VRML创建三维模型和实验场景,用VC搭建虚拟仪器实验平台。将虚拟仪器和虚拟现实两者的优势结合在一起,形成外形逼真和分析功能强大的新型虚拟测量实验。基于VC和VRML技术搭建的虚拟实验平台具有良好的操作性和交互性,能够取代传统测试仪器完成测控实验。以转子实验台为例,介绍了技术实现的细节。 相似文献
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罗艳萍 《读与写:教育教学刊》2008,5(6)
The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity. 相似文献
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Richard Denner 《海外英语》2007,(4):14-15
Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose. 相似文献
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邱崇丙 《唐山师范学院学报》2014,(1):21-23
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。 相似文献
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Given a graph G,a subgraph C is called a clique of G if C is a complete subgraph of G maximal under inclusion and |C|≥2. A clique-transversal set S of G is a set of vertices of G such that S meets all cliques of G. The clique-transversal number, denoted as TC (G), is the minimum cardinality of a clique-transversal set in G. The clique-graph of G, denoted as K (G), is the graph obtained by taking the cliques of G as vertices, and two vertices are adjacent if and only if the corresponding cliques in G have nonempty intersection. Let F be a class of graphs G such that F={G|K(G) is a tree}. In this paper the graphs in F having independent clique-transversal sets are shown and thus TC (G)/|G|≤1/2 for all G ∈ F. 相似文献
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《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
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陈美曦 《山东教育学院学报》2008,23(2):103-107
Different nations have different social cultures, and the social culture of every nation is developing with the development of the nation, language is greatly influenced by social culture, which enables language to possess national and historical characteristics. Word is the smallest, independent, meaningful linguistic unit of language. It can well reflect the national and historical characteristics. From synchronic aspect, the social and cultural influence on word meaning is mainly embodied in conceptual and associative meanings of word. The incorrespondence of word meaning is a phenomenon that exists in both conceptual and associative meanings of word among different languages. From diachronic aspect, the development of social culture causes some changes of word meaning to some extent. Therefore, social culture plays a key role in vocabulary learning and mastery of a language. 相似文献
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Rachel Zupek 《海外英语》2007,(11):40-41
我们绝大部分人都同意一件事情——我们喜欢金钱。但是你对金钱的喜欢之情足够到让你创立一份事业么?.财富通常被人忽视,主要在于人们不能真正了 相似文献
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YANGShiguo 《重庆大学学报(英文版)》2004,3(1):86-88
The problem on the geometrc inequalities involving an n-dimensional simplex and its inscribed simplex is studied. Aninequality is established, which reveals that the difference between the squared circumradius of the n-dimensional simplex andthe squared distance between its circumcenter and barycenter times the squared circumradius of its inscribed simplex is not lessthan the 2(n-1)th power of n times its squared inradius, and is equal to when the simplex is regular and its inscribed siplex is atangent point one. Deduction from this inequality reaches a generalization of n-dimensional Euler inequality indicating that thecircumradius of the simplex is not less than the n-fold inradius. Another inequality is derived to present the relationship betweenthe circumradius of the n-dimensional simplex and the circumradius and inradius of its pedal simplex. 相似文献