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Workshop on Motion and Video Computing

作者： N. Hasler B. Rosenhahn M. Asbach J.-r. Ohm H.-p. Seidel Department 4: Computer Graphics Max Planck Institut für Informatik Saarbruecken Germany Chair and Institute of Communications Engineering RWTH Aachen University Aachen Germany

ISBN: (纸本)9781424431366;9780769527932

Despite strong interest in cloth simulation on the one hand and tracking of deformable objects on the other, little effort has been put into tracking cloth motion by modelling the fabric. Here, an analysis-by-synthesis approach to tracking textiles is proposed which, by fitting a simulated textile to a set of contours, is able to reconstruct the 3D-cloth configuration. Fitting is accomplished by optimising the parameters of the mass-spring model that is used to simulate the textile as well as the positions of a limited number of constrained points. To improve tracking accuracy and to overcome the inherently chaotic behaviour of the real fabric several techniques for tracking features on the cloth's surface and the best way for them to influence the simulation are evaluated.

关键词： Textiles Fabrics Tracking Parameter estimation Deformable models Image reconstruction Constraint optimization Surface fitting Layout computer graphics

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Creation of place advantage under the environment of electronic commerce

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Dongbei Daxue Xuebao/Journal of Northeastern University 2007年第SUPPL. 1期28卷 280-283页

作者： Zheng, Bing Zheng, Shuang-Yang Feng, Yi-Xiong Wei, Zhe College of Economics and Management Dalian University Dalian 116622 China College of Mechatronics Engineering China Jiliang University Hangzhou 310018 China Institute of Engineering and Computer Graphics Zhejiang University Hangzhou 310027 China

Electronic commerce was featured by lowcost, no limitation of scale, electronic payment and easy collection and management of customer information. On the basis of analyzing the weakness of traditional place model, the processes and advantages of direct place and indirect place under the environment of electronic commerce were advanced. Decision-making model for both internet and marketers were constructed. Solutionalgorithm to this equilibrium problem was presented and computation examples were analyzed. Association net, express net, service net and production net should be developed in order to create place advantage under the environment of electronic commerce. The results show that place advantage under the environment of electronic commerce derived from the proposed algorithm would be helpful for enterprises in supply chain.

关键词： Internet

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Development of the ATC simulators

Development of the ATC simulators

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16th International Conference on Artificial Reality and Telexistence - Workshops, ICAT 2006

作者： Shi-feng, Mo Hui, Li Xian-jiang, He Zhi-sheng, You Institute of Graphics and Images School of Computer Science and Engineering Sichuan University Chengdu 610065 China

ISBN: (纸本)076952754X

In the ATC domain, simulated training is an effective approach to cultivate controllers, and ATC simulators providing vivid simulated environment for the trainees are the key devices with high complexity. In this paper, the software product line approach is proposed to build a group of ATC simulators from a common set of core assets. As the core assets shared across our ATC simulators, the high-level procedural model, architecture, real-time network communication component, primitive-based aerostats' operation command mechanism and multi-PC based 3D virtual scene rendering system are analyzed and described in detail, which is helpful to the development of other similar simulation applications. Additionally, the development of a tower simulator is presented as an example with a few screenshots, which shows our solution is effective and helpful to the complex simulation applications family such as ATC simulators. © 2006 IEEE.

关键词： Simulators

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A concise functional neural network for computing the extremum eigenpairs of real symmetric matrices

A concise functional neural network for computing the extrem...

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3rd International Symposium on Neural Networks, ISNN 2006 - Advances in Neural Networks

作者： Liu, Yiguang You, Zhisheng Institute of Image and Graphics School of Computer Science and Engineering Sichuan University Chengdu 610064 China

ISBN: (纸本)354034439X

Quick extraction of the extremum eigenpairs of a real symmetric matrix is very important in engineering. Using neural networks to complete this operation is in a parallel manner and can achieve high performance. So, this paper proposes a very concise functional neural network (FNN) to compute the largest (or smallest) eigenvalue and one corresponding eigenvector. After transforming the FNN into a differential equation, and obtaining the analytic solution, the convergence properties are completely analyzed. By this FNN, the method that can compute the extremum eigenpairs whether the matrix is non-definite, positive definite or negative definite is designed. Finally, three examples show the validity. Comparing with the other ones used in the same field, the proposed FNN is very simple and concise, so it is very easy to realize. © Springer-Verlag Berlin Heidelberg 2006.

关键词： Neural networks

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Focal region-based volume rendering

Focal region-based volume rendering

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作者： Zhou, Jianlong Wang, Zhiyan Tönnies, Klaus D. School of Computer Science and Engineering South China University of Technology Guangzhou 510640 China Institute for Simulation and Graphics University of Magdeburg D-39106 Magdeburg Germany

In this paper, a new approach named focal region-based volume rendering for visualizing internal structures of volumetric data is presented. This approach presents volumetric information through integrating context information as the structure analysis of the data set with a lens-like focal region rendering to show more detailed information. This feature-based approach contains three main components: (i) A feature extraction model using 3D image processing techniques to explore the structure of objects to provide contextual information;(ii) An efficient ray-bounded volume ray casting rendering to provide the detailed information of the volume of interest in the focal region;(iii) The tools used to manipulate focal regions to make this approach more flexible. The approach provides a powerful framework for producing detailed information from volumetric data. Providing contextual information and focal region renditions at the same time has the advantages of easy to understand and comprehend volume information for the scientist. The interaction techniques provided in this approach make the focal region-based volume rendering more flexible and easy to use. © World Scientific Publishing Company.

关键词： Pattern recognition

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基于元胞自动机的单道交通模型研究

基于元胞自动机的单道交通模型研究

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第七届全国交通运输领域青年学术会议

作者： Yang Menglong 杨梦龙 Liu Yiguang 刘怡光 Institute of Image and Graphics School of Computer Science and Engineeting Sichuan UniversityChen 四川大学计算机学院图形图象研究所成都 610064 Center for Nonlinear and Complex Systems School of Electronic Engineering University of Electronic 电子科技大学电子工程学院非线性复杂系统中心成都 610054

对基于元胞自动机的单道交通模型进行研究改进，细化了元胞长度和时间步长，对静止车辆的加速能力进行了约束，用简单的方法解决了NS模型中车辆的速度演化规则与前车速度无关的缺点。同时，考虑了随机慢化概率对交通密度的反应，利用计... 详细信息

对基于元胞自动机的单道交通模型进行研究改进，细化了元胞长度和时间步长，对静止车辆的加速能力进行了约束，用简单的方法解决了NS模型中车辆的速度演化规则与前车速度无关的缺点。同时，考虑了随机慢化概率对交通密度的反应，利用计算机仿真，得到了一些与其他元胞自动机模型共有的性质。另外，与其他模型相比较，新模型得到的基本图更加接近实测数据。

关键词：单道交通模型交通流元胞自动机系统仿真

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Anycast algorithms supporting optical burst switched grid networks

Anycast algorithms supporting optical burst switched grid ne...

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International Conference on Networking and Services 2006, ICNS'06

作者： De Leenheer, Marc Farahmand, Farid Lu, Kejie Zhang, Tao Thysebaert, Pieter Volckaert, Bruno De Turck, Filip Dhoedt, Bart Demeester, Piet Jue, Jason P. Department of Information Technology Ghent University IMEC Department of Computer Electronics and Graphics Technology Central Connecticut State University Department of Electrical and Computer Engineering University of Puerto Rico Mayagüez Puerto Rico Department of Computer Science New York Institute of Technology Old Westbury Department of Electrical Engineering and Computer Science University of Texas Dallas United States

ISBN: (纸本)0769526225

In this paper we consider implementing optical burst switching as a technology for building Grids with computationally intensive requirements. This architecture has been referred to as Grid-over-OBS (GoOBS). First, we briefly describe the proposed layered Grid architecture and show how OBS can be positioned within the Grid architecture. Then, we present a generic framework for anycast routing in the context of GoOBS when requests don't have an explicit destination address and they can be serviced by any appropriate Grid resource. We also develop several algorithms to support anycasting when only a single copy of a request is transmitted. Through simulation analysis, we show the performance of our anycast algorithms and compare them with traditional shortest-path unicast routing in which all jobs have specific addresses. Our performance analysis focuses on blocking probability of requests and average end-to-end delay. © 2006 IEEE.

关键词： Grid computing

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Application-Oriented Extensions of Profile Flags

Application-Oriented Extensions of Profile Flags

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8th Joint Eurographics/IEEE VGTC Symposium on Visualization, EuroVis 2006

作者： Mlejnek, Matej Ermes, Pierre Vilanova, Anna van der Rijt, Rob van den Bosch, Harrie Gerritsen, Frans Gröller, M. Eduard Institute of Computer Graphics and Algorithms Vienna University of Technology Austria Philips Medical Systems Best Netherlands Department of Biomedical Engineering Technische Universiteit Eindhoven Netherlands Catharina Hospital Eindhoven Netherlands

ISBN: (纸本)3905673312

This paper discusses two applications of probing dense volumetric data for MR orthopedics and dynamic contrast enhanced MRI mammography. In order not to reduce the context information and to extract the essential part of the data, we apply Profile Flags. A Profile Flag is a 3D glyph for probing and annotating the volumetric data. The first application area deals with visualization of T2 profiles for interactive inspection of knee cartilage and detection of lesions. In the second application, we present the usability the Profile Flags for measuring of time-signal profiles for a set of time-dependent MR volumes. Several extensions of the basic Profile Flag concept are described in detail and discussed. These extensions include selection of a set of profiles based on spatial as well as curve differences, automatic positioning of the Profile Flags, and adaptation for probing of time-varying volumetric data. Additionally, we include the evaluation of the used methods by our medical partners. © The Eurographics Association 2006.

关键词： Dynamic contrast enhanced MRI

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A Sum-over-Paths impulse-response moment-extraction algorithm for IC-interconnect networks: Verification, uncoupled RLCM lines

A Sum-over-Paths impulse-response moment-extraction algorith...

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23rd International VLSI Multilevel Interconnection Conference, VMIC 2006

作者： Le Coz, Y.L. Krishna, D. Petranovic, D.M. Electrical Computer and Systems Engineering Dept. Rensselaer Polytechnic Institute Troy NY 12180-3590 United States Mentor Graphics Corporation 8005 SW Boeckman Rd. Wilsonville OR 97070-9733 United States

We have created a stochastic impulse-response (IR) moment-extraction algorithm for RLCM circuit networks. It employs a newly discovered Feynman Sum-over-Paths (SoP) postulate. We report here results of an initial numerical verification, involving an uncoupled RLCM-line benchmark problem. We obtained promising results: less than 0.5% and 10% approximate l-σ error for first- and second-order IR moments, respectively, after only 10K sampled path-sum terms. We believe, in conclusion, that this type of IR-moment extraction algorithm may find useful application in a massively coupled electrical system, such as that encountered in high-end digital-IC interconnects.

关键词： Impulse response

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Acceleration of Time-Domain Finite Element Method (TD-FEM) using graphics Processor Units (GPU)

Acceleration of Time-Domain Finite Element Method (TD-FEM) u...

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作者： Liu, K. Wang, Xiao-Bing Zhang, Yang Liao, Cheng Institute of Electromagnetics Southwest Jiaotong University Chengdu Sichuan 610031 China School of Computer Science and Engineering University of Electronic Science and Technology of China China Hardware Architecture Sector of S3 Graphics ShangHai China

ISBN: (纸本)1424401623

The Time-Domain Finite Element Method is used extensively in areas of microwave engineering. However, TD-FEM runs too slow for some simulations to be practical, especially when run on standard personal computers. The propriety of hardware for the acceleration of TD-FEM computations has been investigated. It is well known that the key of TD-FEM is matrix operation. There always be an obstacle that the speedup of dense matrices operations in graphics Processor Units fields. This situation will be improved in next generation. Even though the presence of the obstacle, the standard consumer graphics Processor Units (GPUs) can be used to accelerate TD-FEM simulations by a factor of close to two yet, relative to an Intel CPU of similar technology generation. With OpenGL as the Application Programming Interface (API), a standard commercial graphics card has been programmed to solve a 2-D electromagnetic radiation problem.

关键词： Electromagnetic waves

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