基于VRML的机械设备虚拟场景构建

介绍了虚拟现实建模语言VRML,阐述了VRML模型创建和机械设备虚拟场景构建的方法。以减速器为实例,对上述方法进行了实验,并通过Java Applet与减速器虚拟场景实现了信息交互。该方法既可以用于机械设备虚拟场景的构建,还可以供电子商务等领域的虚拟场景构建参考。     

VRML场景中复杂运动控制研究

VRML提供了丰富的网络三维造型和交互功能,但交互性不够强。Java语言是一种高性能的程序设计语言,灵活、计算能力强大。文章以Java与VRML结合为基础,论述了Java和VRML场景通讯接口Script节点定义及工作机制J、ava和VRML的通讯机制,并在最后给出了应用事例和结论。     

VRML与Java的高效结合分析

虚拟现实技术的标准语言VRML在当前互连网上作为通用规范受到了广大用户的积极支持和愈加广泛的应用。但由于其自身功能的局限性,制作较复杂的动画效果能力稍显薄弱。本文主要通过具体事例来阐述Java语言在控制由VRML所构建实际场景的实现机制以及Java与VRML高效结合后对于Internet上理想的3D虚拟场景形成的积极意义。     

基于VRML的虚拟场景优化技术

VRML技术可以建立网上的、三维的、可交互的虚拟场景,本文中介绍了虚拟现实的概念与VRML技术特征,并给出了使用VRML语言和能够生成VRML三维空间的可视化工具建立虚拟场景的具体优化方法。     

基于虚拟现实技术的变电站三维场景仿真技术

介绍了变电站的三维场景建模方法,采用虚拟现实建模语言(VRML)建立了三维虚拟电气设备及虚拟变电站,并且通过VRML的Script节点调用Java程序实现了交互功能。应用三维图形技术为变电站仿真系统构造虚拟环境能大大提高变电站场景的真实感,同时,将电力系统仿真软件与虚拟变电站连接起来模拟变电站的各种运行状态,为变电站仿真培训工作带来技术飞跃。该系统不仅具有三维显示、实时交互及动态仿真等特点,还可以在PC机和Windows操作系统环境下运行,因此具有经济、高效、便于使用等优点。     

Java3D虚拟室内装饰效果展示研究

目前虚拟现实的建模方法主要采用OpenGL,VRML等语言进行编程,这存在着难以掌握、不易广泛推广等缺点。而Java3D作为一种新兴的三维开发应用程序接口,则提供了高效的开发性能。结合实际应用中的实现方法和步骤,对使用Java3D构建虚拟环境,丰富三维表现效果,实现环境与用户的交互等进行了研究,并给出在Java3D场景中实现虚拟场景漫游的方法。     

虚拟现实技术在电子商务中的应用

介绍了基于VRML技术的电子商务系统的设计和实现,成功地解决了虚拟现实系统与用户交互的接口,提供给用户一个三维的虚拟商务场景并能交互地进行交易。     

基于VRML的虚拟现实(场景)制作

虚拟现实（VirtualReality，简称VR）是一种基于计算机技术构建的沉浸式交互环境。由于其具有媒体多样性、强烈的临场感及接近自然操作的交互性等特点，特别适用于教学中学习环境的构建虚拟现实技术在PC上的实现目前主要有以下两种方式：１．采用苹果公司QTVR技术，将一系列连续的静止图片组合成．mov影片文件，其优点是制作简便形象生动、真实自然；缺点是浏览者视点是预先设定的，观看时不可随心所欲地改变视点。２．利用VRML实现。这种方式的优点是，在利用VRML实现的虚拟现实场景中，用户的视点是自由的，可以在三维虚拟空间内…     

VRML与JAVA相结合开发3D交互式虚拟场景

借助EAI和Script节点将Java和VRML相结合，构建了一个三维交互式的虚拟场景，该场景克服了VRML在交互方面的不足，实现了用户与虚拟场景之间以及用户与用户之间的交互和共享的功能，并在此基础上，构建了一个用于计算机图形学教学的虚拟场景框架，为VRML在远程教育方面的普及和应用做了有益的探索。     

VRML虚拟场景中交互设计策略

文章介绍了基于VRML的虚拟现实技术,以及用其开发虚拟场景时实现用户和场景相互交互的原理、方法以及实现过程,并给出了一个典型的应用实例.     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

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?     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

库克斯顿城堡

城堡, 是欧洲典型的建筑之一, 每个城堡都有一个美丽的传说或是一段历史。从本期开始, 我们将推出“城堡之旅”, 带各位读者去浏览、观赏欧洲各地的城堡, 开始一段文化与历史的旅途!     

The Reader Response Approach to Teaching of English Literature

During interview with English majors, it was found that a majority of students expressed disappointment with their experience of English literature classes. Students' dislike of learning English literature appears to be the major problem of teaching English literature in China. Reader response approach is a good way to solve this problem. In this paper, I explain the rationale behind the reader response approach, such as its origin, definition, features, assumptions, and strategies. Then I illustrate how reader response approach works as a teaching strategy by presenting several teaching models. At last I evaluate its usefuiness for teachers and present the advantages of reader response approach in Chinese context.