检索结果-内蒙古大学图书馆

A hybrid DVE architecture based on temp server

Journal of Southeast University(English Edition) 2006年第2期22卷 180-184页

作者：吴言华蔡云泽许晓鸣上海交通大学计算机科学与工程系上海交通大学自动化系上海理工大学上海系统科学研究院上海200030

A hybrid distributed virtual environment （DVE） architecture is presented by importing a peer-to-peer （P2P） idea into the traditional client/server （C/S） architecture to improve the DVE system＇s scalability. The mathematical model of the overload of the center server was built and a series of simulation experiments were performed to validate the conclusions. When the client number increases to a certain value, the hybrid architecture can reduce server overload with some special clients （temp servers） selected with a certain heuristic strategy. With this architecture, the DVE system can support more system clients with the same server hardware than the C/S architecture can. The server overload ＂pulse＂ phenomena causing by the exiting of the temp server can be resolved by adopting a more optimized temp server selecting strategy and by reducing the child client capability of the temp server. By combining the advantages of the C/S architecture and the P2P architecture, the hybrid DVE architecture can effectively improve the scalability of the DVE system. This is validated by theoretical analysis and simulation experiments.

关键词： distributed virtual environment temp server user scale peer-to-peer client/server

来源：评论

学校读者我要写书评

暂无评论

Streaming 3D deforming surfaces with dynamic resolution control

引用

COMPUTER ANIMATION AND virtual WORLDS 2015年第1期26卷 15-28页

作者： Zhang, Lin Dou, Fei Zhou, Zhong Wu, Wei Beihang Univ State Key Lab Virtual Real Technol & Syst Beijing 100191 Peoples R China Beihang Univ Sch Comp Sci & Engn Beijing 100191 Peoples R China

Real-time streaming of shape deformations in a shared distributed virtual environment is a challenging task due to the difficulty of transmitting large amounts of 3D animation data to multiple receiving parties at a high frame rate. In this paper, we present a framework for streaming 3D shape deformations, which allows shapes with multi-resolutions to share the same deformations simultaneously in real time. The geometry and motion of deforming mesh or point-sampled surfaces are compactly encoded, transmitted, and reconstructed using the spectra of the manifold harmonics. A receiver-based multi-resolution surface reconstruction approach is introduced, which allows deforming shapes to switch smoothly between continuous multi-resolutions. On the basis of this dynamic reconstruction scheme, a frame rate control algorithm is further proposed to achieve rendering at interactive rates. We also demonstrate an efficient interpolation-based strategy to reduce computing of deformation. The experiments conducted on both mesh and point-sampled surfaces show that our approach achieves efficient performance even if deformations of complex 3D surfaces are streamed. Copyright (c) 2013 John Wiley & Sons, Ltd.

关键词： streaming media 3D shape deformation distributed virtual environment multi-resolution point-sampled surface progressive surface

来源：评论

学校读者我要写书评

暂无评论

Integration of Manufacturing Services into virtual environments over the Internet

引用

International Journal of Automation and computing 2004年第1期1卷 89-106页

作者： Huiping Shang Zhengxu Zhao Beijing Institute of Tracking Telecommunication and Technology Beijing PRC Virtual Reality Technology Research Centre Department of Instrumentation Science and Engineering Southeast University Nanjing PRC

virtual reality (VR) is a rapidly developing technology that has a wide spectrum of industrial and commercial applications. Networked (distributed or shared) virtual environments (VE) are of growing interest to modern manufacturing industry; a dominating use of networked virtual manufacturing environments (VMEs) is on-line visualisation and collaborative control of 3D information. This has to be supported by real-time data transfer. To meet a broad range of common requirements for Internet-based VE communications, particularly for virtual manufacturing and collaborative design and control, this paper presents a networked virtual environment system that is designed to support networked virtual design and manufacturing. The system is implemented with manufacturing message specification (MMS) standards so as to integrate a range of manufacturing services into networked VEs over the Internet.

关键词： distributed virtual environment networked virtual environment shared virtual environment virtual reality (VR) virtual environment (VE) virtual manufacturing virtual manufacturing device (VMD) manufacturing message specification (MMS) communication protocol

来源：评论

学校读者我要写书评

暂无评论

distributed Open Inventor: a practical approach to distributed 3D graphics 99

Distributed Open Inventor: a practical approach to distribut...

引用

Proceedings of the ACM symposium on virtual reality software and technology

作者： Gerd Hesina Dieter Schmalstieg Anton Furhmann Werner Purgathofer Vienna University of Technology Austria

ISBN: (纸本)9781581131413

distributed Open Inventor is an extension to the popular Open Inventor toolkit for interactive 3D graphics. The toolkit is extended with the concept of a distributed shared scene graph, similar to distributed shared memory. From the application programmer's perspective, multiple workstations share a common scene graph. The proposed system introduces a convenient mechanism for writing distributed graphical applications based on a popular tool in an almost transparent manner. Local variations in the scene graph allow for a wide range of possible applications, and local low latency interaction mechanisms called input streams enable high performance while saving the programmer from network peculiarities.

关键词： virtual reality distributed graphics distributed virtual environment computer supported cooperative work scene graph concurrent programming

来源：评论

学校读者我要写书评

暂无评论

The Study of Data Analysis Based Petri Net in DVE

The Study of Data Analysis Based Petri Net in DVE

引用

Asian Simulation Conference/The 6th International conference on system Simulation and Scientific Computing

作者： ZHAO Xinjun (National Defence Key Laboratory for Army Armament System, Beijing, China)

Because the software systems in DVE become more and more complexity, the data analyze of software system become more and more important. With the data analyze of software system, we can understand the change of the data in the system more deeply and provide convenience to full life data management. This paper analyzes the characteristic of the data in DVE and put forward the DN method that based on Petri net. With this method we can analyze the data in the DVE, including the dynamic change and influence each other of the data, and finally we illustrated how to do it at the end of this paper.

关键词： distributed virtual environment Data Petri net

来源：评论

学校读者我要写书评

暂无评论

The Research on Real-time Natural environment Server in virtual environment

The Research on Real-time Natural Environment Server in Virt...

引用

Asian Simulation Conference/The 6th International conference on system Simulation and Scientific Computing

作者： PANG Guofeng (The Laboratory of Intelligent Technology and Systems, Tsinghua University, Beijing, China, 100084)

Natural environment conditions could cause great effect on equipment's performance and army's operation in the real world. The current research about natural environment simulation in DVE (distributed virtual environment) mainly focused on the static data (such as terrain) requirements and its data processing. The dynamic environment's simulation and its data fusion were considered rarely. So the reality and confidence of these systems were insufficient. This paper analyzed natural environment, discussed the modeling of natural environment and its data's collection and organization, and built a virtual Natural environment Server based on HLA/RTI protocol as well.

关键词： distributed virtual environment distributed Interactive Simulation virtual Natural environment High Level Architecture

来源：评论

学校读者我要写书评

暂无评论

A Consistency Algorithm for Causal and Totally Ordered Event Delivery in DVE

A Consistency Algorithm for Causal and Totally Ordered Event...

引用

2010 3rd IEEE International Conference on Computer Science and Information Technology—ICCSIT 2010

作者： Hangjun Zhou1,2 Wei Zhang1 Yuxing Peng1 and Sikun Li1 1Key Laboratory of Science and Technology for National Defence of Parallel and distributed Processing, School of Computer Science, National University of Defense Technology, Chang Sha, Hu Nan, 410073, P. R. of China 2Department of Information Management, Hunan College of Finance and Economics, Chang Sha, Hu Nan, 410205, P. R. of China

How to preserve causal and totally ordered event delivery is an important issue in real-time serverless DVE(distributed virtual environment). However, most of the related works are designed to maintain causal order merely or time stamped order with intensive computation and bandwidth overhead. In this paper, we proposed a novel distributed algorithm to maintain the before-and-after relationship between events, both causal and concurrent, of DVE at each individual node. Several simulation experiments are carried out to evaluate the performance of our algorithm and the results demonstrate that the algorithm is effective in preserving causal and totally ordered event delivery and more efficient than the previous algorithms.

关键词： distributed virtual environment causal and totally ordered concurrent events consistency algorithm

来源：评论

学校读者我要写书评

暂无评论

A method for sharing interactive deformations in collaborative 3D modeling 99

A method for sharing interactive deformations in collaborati...

引用

Proceedings of the ACM symposium on virtual reality software and technology

作者： Hiroaki Nishino Kouichi Utsumiya Kazuyoshi Korida Atsunori Sakamoto Kazuyuki Yoshida Dept. of Computer Science and Intelligent Systems Oita University Oita 870-1192 Japan Dept. of Communication Oita Pref. College of Arts and Culture Oita 870-0833 Japan

ISBN: (纸本)9781581131413

This paper proposes a new approach to collaboratively designing original products and crafted objects in a distributed virtual environment. Special attention is paid to concept formulation and image substantiation in the early design stage. A data management strategy and its implementation method are shown to effectively share and visualize a series of shape-forming and modeling operations performed by experts on a network. A 3D object representation technique is devised to manage frequently updated geometrical information by exchanging only a small amount of data among participating systems. Additionally, we contrive a method for offloading some expensive functions usually performed on a server such as multi-resolution data management and adaptive data transmission control. Client systems are delegated to execute these functions and achieve “interactivity vs. image quality” tradeoffs based on available resources and operations in a flexible and parallel fashion.

关键词： collaborative design computer graphics 3D object modeling distributed virtual environment

来源：评论

学校读者我要写书评

暂无评论

Study on Web-based shiphandling training system

引用

Xitong Fangzhen Xuebao / Journal of System Simulation 2006年第5期18卷 1208-1211页

作者： Xie, Cui Liu, Xiu-Wen Jin, Yi-Cheng Computer Science Department Ocean University of China Qingdao 266071 China Nautical Science and Technology Institute Dalian Maritime University Dalian 116026 China

Based on Web-based simulation theory, a prototype of the web-based shiphandling training system was designed and implemented, which aims at overcoming the weakness of high expenditure, long developing period and the limited accessibility of numerous marine simulation systems. The research focuses on the feature, architecture, 3D modeling, interaction and integration of this system. This system adopts Java to construct a web-based three-level architecture, which is open and strong compatible. The system creates an interactive and immersible virtual navigation world by using VRML. As a result, it allows many users to perform shiphandling and decision-making training online from anywhere, anytime. This training platform provides a portable and flexible training paradigm for maritime education and training.

关键词： distributed virtual environment Java Marine simulation Vrml

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：