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Knowledge integration in early design stages for collaboration on a virtual mock up

Knowledge integration in early design stages for collaborati...

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international conference on computer Supported Cooperative Work in design

作者： I. Thouvenin D. Lenne A. Guenand S. Aubry Compiègne Laboratoire Heudiusyc Centre Pierre Guilluumat Compiègne UTC-Université de Technologie France Compiègne Laboratoire Heudiusyc Centre de Recherches Royallieu Compiègne UTC-Université de Technologie France Compiègne Laboraidre ODIC Centre Pierre Guillaumaf Compiègne UTC-Université de Technologie France Gompiègne Laboratoire Heudiusyc Centre de Recherches Royallieu Compiigne UTC-Université de Technologie France

With the intensification and the expansion of collaboration modes between designers and engineers for better time and quality mastering, the communication efficiency between these two communities of practice have to be thought taking in to account both designers and engineer's representation systems. While designers participate to the concept research and deliver the product's scenario of use through images, sketches and renderings, the engineers participate to the physical definition and to the materialization of these concepts. There is a need for a common representation of the concepts and the product, i.e. explicit link between the subjective data coming from the designer and the objective data materializing the product. Nevertheless semantic product characterization have specific tools and methods usually found in 2D environments and 3D CAD systems do not answer to the needs of exchanges in a multi disciplinary design team. In this paper we introduce a virtual environment to integrate, capitalize and explore knowledge around the virtual mock up in order to facilitate subjective and objective product characterization for designers and engineers collaboration. This virtual environment (MATRICS) allows the user to post multi-media annotations on a virtual 3D mock up, to support intentions transferred from the designer to the engineer when communicating. Another aspect of this environment is to provide a shared visualization of knowledge connected to the model and users interaction with knowledge representation increasing the collaboration level while designing.

关键词： Collaboration design engineering Virtual environment Systems engineering and theory Rendering (computer graphics) design automation Product design Knowledge engineering Multimedia communication Visualization

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Ship hull fitting using NURBS

Ship hull fitting using NURBS

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international conference on computer graphics, Imaging and Visualization, CGIV

作者： A.S. Wen S.M.H. Shamsuddin Y. Samian Department of Graphics and Multimedia Faculty of Computer Science and Information System Universiti Teknologi Malaysia Malaysia Department Of Marine Technology Faculty of Mechanical Engineering Universiti Teknologi Malaysia Malaysia

Ship hull form module is the main module in ship design. The problem of creating fair ship hull surface is of major importance in computer aided ship design environment. The fairness of these surfaces is generally considered a subjective notion depending on the judgment of the designers (e.g. visually pleasing, devoid of unnecessary bumps or wiggles, satisfying certain continuity requirements). One of the restriction in ship hull design is that the existing details of a ship design on paper or a ship that already been constructed physically couldn't be reconstructed accurately and concisely in a ship hull design software. This problem can take on many different characteristics, depending on the goal of the reconstruction, the origin of the offset, and tools or methods available to tackle the job. All of these must be taken into account in developing the best approach to solving the problem in the most efficient manner. In this research, the implementation of NURBS method is used because it brings the most convincing results.

关键词： design automation Surface fitting Curve fitting Computational geometry

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Knowledge visualization in practice: challenges for future corporate communication

Knowledge visualization in practice: challenges for future c...

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international conference on Information Visualisation (IV)

作者： S. Klein Research Interaction and Communication Design DaimlerChrysler Aerospace Germany

In this paper, the author illustrates some of the key challenges for knowledge visualization in corporate communication. Based on a case study from Edward Tufte and an evolutionary account of Mihai Nadin, the author argues that interactivity is an essential issue with regard to organizational communication or knowledge media design in general. Finally, he presents an example that comes from a recent DaimlerChrysler research project. This project used an interactive visualization to support the communication between several different management levels and professional backgrounds.

关键词： Data visualization Information analysis Professional communication Project management Failure analysis Rendering (computer graphics) Workstations Data mining Mechanical engineering graphics

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Automatic identifying weave patterns for double-layer weft woven fabric

Automatic identifying weave patterns for double-layer weft w...

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international conference on computer graphics, Imaging and Visualization, CGIV

作者： Haihong Wu Mingmin Zhang Zhigeng Pan Haiming Yin State Key Laboratory of CAD & CG University of Zhejiang China

Automatic identifying weave pattern is an important research area for computer aided design of textile products. Based on the scanned surface images, we have developed a semi-automatic identification system of weave patterns for double-layer weft woven necktie fabric. With manual partitioning, the complicated necktie fabric pattern is regarded as combination of several single-layer weave patterns. Image processing techniques are employed to segment the fabric color image, such as color clustering, morphological operation, etc. A novel algorithm to correct warp displacements is proposed to perform yarns segmentation more precisely. Finally, the integrated method to identify the double-layer woven fabric, which combines automatic identifying single-layer weave with human-computer interaction, is illustrated. The experimental results show the practicability and efficiency of our system.

关键词： Fabrics Image segmentation Color Product design Textile products Surface morphology Image processing Morphological operations Clustering algorithms Partitioning algorithms

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POLAR: Placement based on novel rough legalization and refinement 13

POLAR: Placement based on novel rough legalization and refin...

引用

IEEE international conference on computer-aided design

作者： Tao Lin Chris Chu Joseph R. Shinnerl Ismail Bustany Ivailo Nedelchev Department of Electrical and Computer Engineering Iowa State University IA Mentor Graphics Corporation Fremont CA

ISBN: (纸本)9781479910694

A new quadratic global placer called POLAR is proposed. POLAR is based on novel techniques for rough legalization and wirelength refinement. During look-ahead rough legalization (LAL), relative positions of cells are maintained as they are relocated with minimal displacement to relieve excess area density. For each “hotspot” where placement overfill occurs, an expansion region covering the hotspot is constructed. Then the movable cells within each of these expansion regions are evenly assigned to density bins inside the expansion region by displacement-minimizing recursive bisection. In addition, a fast density-preserving and wirelength-reducing discrete refinement is applied to the first few LAL placements before each of these is used to augment the quadratic model used to obtain the next major placement iteration. The experimental results show that POLAR outperforms the state-of-the-art academic placers over the ISPD 2005.benchmarks.

关键词： Linear systems Runtime Force Partitioning algorithms Optimized production technology Law

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A case study based approach to knowledge visualization

A case study based approach to knowledge visualization

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international conference on Information Visualisation (IV)

作者： M. Zeiller Department of Information and Knowledge Management University of Applied Sciences Burgenland Austria

Case studies are proposed as a research method on knowledge visualization that can deal with the multidisciplinarity, the large variety of research targets and the complex correlations of this type of information visualization utilized for supporting tasks of knowledge management. A suitable case structure is presented that documents the analyzed cases and allows for a comparative analysis of multiple cases. To be able to systematically evaluate and compare the applied visualization techniques a set of evaluation criteria is introduced.

关键词： computer aided software engineering Visualization Knowledge management Libraries Information filtering Information filters Art Cognition Sampling methods Logic design

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Study on scale space of 3D modeling

Study on scale space of 3D modeling

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international conference on Machine Learning and Cybernetics (ICMLC)

作者： Yong Cai Dian-Hua Zhang School of Computer & Communications Engineering Southwest Jiaotong University Chengdu China Department of Computer Science Southwest University of Science and Technology Mianyang China

3D geometry has become increasingly popular as a new form of digital media. With increasing complexity of 3D geometric models and growing demand for advanced modeling functionality, significant effort is being devoted to the design of efficient, reliable, and scalable algorithms for digital geometry processing. We introduce a multi-scale surface representation that enables sophisticated editing functionality at different approximation levels, using the concept of scale-space. The key issue is the interconnection between successive levels in the hierarchy. We use a fairing operator - a geometric low-pass filter to generate successively smoother approximation levels of a given input surface, and use a decomposition operator to encode each level relative to the next smoother level using normal displacements to ensure intuitive detail preservation. This method offers advanced modeling semantics for free-form deformation.

关键词： Solid modeling Low pass filters Space technology computer graphics Multilevel systems computer aided instruction computer science Computational geometry Algorithm design and analysis Deformable models

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Diagramming design: visualizing user interactions with colour palettes

Diagramming design: visualizing user interactions with colou...

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international conference on Information Visualisation (IV)

作者： C. Stones University of Leeds UK

This is a partly practical, partly theoretical paper regarding the uses and potential uses of capturing and visualising digital design moves. The paper-based sketch consists of ambiguous marks that evidence shifts in creative thinking over time. When the artist or designer uses digital technologies to design, only final polished digital marks remain at the end of a session. The processes by which the final design occurred are invisible. This paper presents visualizations of task-based and highly constrained design activities such as colour selection to indicate what can be learned by visualizing mechanical design processes. By visualizing how student designers move across two different designs of colour palette both artistically and empirically interesting results are found. Visualizing design moves enables the design researcher to discover patterns within design behaviour, enables the usability researcher to test interface usage, and enables the designer to create images with aesthetic potential through process alone.

关键词： Visualization Color Process design Usability Testing Audio recording computer graphics Prototypes Decision making Concrete

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Liquid 2D scatter space for file system browsing

Liquid 2D scatter space for file system browsing

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international conference on Information Visualisation (IV)

作者： C. Waldeck ZGDV-Computer Graphics Center Department Z3 (MIV: Mobile Information Visualization) Infoverse Organisation

This (video-) paper describes a user interface concept, which facilitates multidimensional visual queries, filtering and browsing of the file system at the same time by means of the "liquid scatter space" (LSS) concept (Waldeck, 2004). The UI concept is based on an advanced star field display (Ahlberg & Shneiderman, 1994) using liquid browsing (Waldeck, 2004) and selection based (sketch-) queries. It allows realtime search and browsing at the same time (integrated into one single user interface) and can visualize the most important file system meta data dimensions simultaneously: 1. filename; 2. creation/modification date; 3. filesize; 4. filetype; and 5. label. LSS provides very fast and easy visual data mining possibilities for the desktop and makes it possible to perceive complex dependencies between the most important file system meta data properties at a glance. It also overcomes the "hidden-deep-down-in-hierarchy-structures"-problem by making it possible to use folders for structuring but not being bound to them. This paper focuses on visual design and interaction aspects and emphasizes the importance of paying regard to visual interactive details for information visualization and interaction interfaces and the need of making it easy to use.

关键词： Scattering File systems Data visualization Operating systems Navigation computer graphics Lenses Sorting Shape Animation

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Moore's law is unconstitutional

Moore's law is unconstitutional

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international conference on VLSI design

作者： W.C. Rhines Mentor Graphics Corporation USA

Moore's law is the empirical observation that component density and performance of integrated circuits - approximately doubles every eighteen months. It is not a 'law' in the sense that basic principals of physics and thermodynamics constitute the rules of nature. But there is a 'law' that serves as the basis for Moore's law; it is the general principle that governs learning curves, i.e. that efficiencies improve a fixed percentage with increases in the total accumulated volume of production, when analyzed on a logarithmic scale. Analyzing current trends in integrated circuit technology reveals the potential left to achieve performance, reliability and cost improvements via the traditional means of shrinking design rules and increasing die and wafer size. It also suggests where nontraditional innovation is likely to have its greatest impact. This talk explores these projections for future technology and suggest where the discontinuities are most likely to occur.

关键词： Moore's Law Board of Directors graphics Integrated circuit technology Consumer products Data systems Application specific integrated circuits Very large scale integration Embedded system computer aided manufacturing

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