Managing Computer Aided Design
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Managing Computer Aided Design
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Author : Ian McLoughlin
language : en
Publisher:
Release Date : 1989-01-01
Managing Computer Aided Design written by Ian McLoughlin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989-01-01 with Computer-aided design categories.
Managing Computer Aided Design
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Author : Institution of Mechanical Engineers (Great Britain). Process Industries Division
language : en
Publisher:
Release Date : 1980
Managing Computer Aided Design written by Institution of Mechanical Engineers (Great Britain). Process Industries Division and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Computer graphics categories.
Version Control And Management In Computer Aided Design Databases
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Author : Rafi Ahmed
language : en
Publisher:
Release Date : 2019-05-31
Version Control And Management In Computer Aided Design Databases written by Rafi Ahmed and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-05-31 with Computers categories.
Abstract: There are essentially two characteristics of design objects which impact upon the iterative and probative nature of the design process. first, they are hierarchically formed assemblies of component objects. Second, they have several alternative representations. This dissertation addresses a broad spectrum of modeling and operational issues related to these two aspects in computer-aided design databases. A formal treatment of data modeling concepts, which are defined in terms of primitive constructs of instances, type, homogeneous sets and functions, and abstractions of generalization and composition, is presented for design applications. A classification of composite object attributes into intrinsic interface and extrinsic internal assembly provides an insight into their behavior and functionality. The design process is studied with respect to these classes of attributes. A design evolves in discrete states through mutation and derivation, which may cause version proliferation in the absence of any control mechanism. concepts of invariant attributes and value acquisition are found to be useful for developing a notion of version equivalence. A wide range of methodologies for version management and solutions for the related problems are discussed. The interdependence between composition and generalization graphs suggests that the effect of these graphs on each other must evaluated for maintaining consistency. A time complexity analysis of algorithms devised for this purpose shows a considerably improved performance when the stored, rather than the dynamically computed, transitive closures of these graphs are used. The trade-off it provides far outweighs the space requirement of the transitive closure relations. Owing to the sheer complexity and size of design databases, efficient organization and access of versioned composite objects become imperative. The proposed scheme and its related algorithms can determine an optimal storage organization based on significant units of clustering and expected frequency of retrieval and update operations. A multi-layer architecture is motivated by the accessibility and stability of versions they contain. the proposed protocols for sharing and transition of versions together with change notification provide a unifying framework for managing design in a cooperative CAD environment. Dissertation Discovery Company and University of Florida are dedicated to making scholarly works more discoverable and accessible throughout the world. This dissertation, "Version Control and Management in Computer-aided Design Databases" by Rafi Ahmed, was obtained from University of Florida and is being sold with permission from the author. A digital copy of this work may also be found in the university's institutional repository, IR@UF. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation.
Information Management For Engineering Design
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Author : Randy H. Katz
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Information Management For Engineering Design written by Randy H. Katz and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Computers categories.
Computer-aided design syst,ems have become a big business. Advances in technology have made it commercially feasible to place a powerful engineering workstation on every designer's desk. A major selling point for these workstations is the computer aided design software they provide, rather than the actual hardware. The trade magazines are full of advertisements promising full menu design systems, complete with an integrated database (preferably "relational"). What does it all mean? This book focuses on the critical issues of managing the information about a large design project. While undeniably one of the most important areas of CAD, it is also one of the least understood. Merely glueing a database system to a set of existing tools is not a solution. Several additional system components must be built to create a true design management system. These are described in this book. The book has been written from the viewpoint of how and when to apply database technology to the problems encountered by builders of computer-aided design systems. Design systems provide an excellent environment for discovering how far we can generalize the existing database concepts for non-commercial applications. This has emerged as a major new challenge for database system research. We have attem pted to avoid a "database egocentric" view by pointing out where existing database technology is inappropriate for design systems, at least given the current state of the database art. Acknowledgements.
Contributions To Computer Aided Design
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Author : International Association of Science and Technology for Development
language : en
Publisher: Anaheim, Calif. ; Calgary : ACTA Press
Release Date : 1985
Contributions To Computer Aided Design written by International Association of Science and Technology for Development and has been published by Anaheim, Calif. ; Calgary : ACTA Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with Computers categories.
Information Management For Engineering Design
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Author : Randy H Katz
language : en
Publisher:
Release Date : 1985-06-01
Information Management For Engineering Design written by Randy H Katz and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985-06-01 with categories.
An Object Oriented Data Model For Managing Computer Aided Design And Computer Aided Manufacturing Data Bases
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Author : Stephanie Cammarata
language : en
Publisher:
Release Date : 1986
An Object Oriented Data Model For Managing Computer Aided Design And Computer Aided Manufacturing Data Bases written by Stephanie Cammarata and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with Computer programs categories.
"This paper develops sophisticated data management facilities for maintaining computer-aided design (CAD) and computer-aided manufacturing (CAM) databases. The product of this research is the theoretical design of an object-oriented data model (ODM), and the implementation of an ODM computer software prototype. The work focuses on mechanical design, engineering, and manufacturing, specifically product definition data generated during initial design phases. Detailed analysis of CAD/CAM application and data management requirements were conducted to produce the ODM functional specifications. This paper presents the results of this analysis and an evaluation of ODM in achieving the goals of integrated CAD/CAM data management systems. Although most discussion concentrates on mechanical manufacturing, the developed methodology and tools for CAD/CAM data management apply to other design domains such as architecture and electronics."--Rand abstracts
Management Of Standard Graphic Symbols In A Computer Aided Design And Drafting Environment Using Neural Network Approaches
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Author : Der-Shung Yang
language : en
Publisher:
Release Date : 1994
Management Of Standard Graphic Symbols In A Computer Aided Design And Drafting Environment Using Neural Network Approaches written by Der-Shung Yang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Neural networks (Computer science) categories.
Abstract: "Computer-Aided Design and Drafting (CADD) systems have become prevalent for producing building design drawings. An ultimate goal of CADD systems is to automate analyses and communication of high-level design information extracted from CADD drawings, a difficult task because of the lack of CADD standards. Using standard graphic symbols attached with symbolic information can help, but locating symbols in large libraries is difficult. AUGURS is a new interactive tool designed to assist CADD users in utilizing standard symbols. The task of recognizing symbols sketched by CADD users differs from traditional pattern recognition problems in several ways. Standard libraries have over 1000 symbols, grouped into seven disciplines. The large symbol set makes training data difficult to obtain. Since AUGURS is embedded in the CADD system, it must be efficient and compact. Also, it needs to handle irregular distortion in symbols sketched by users. These difficulties are lessened by the special output format that requires AUGURS to perform only 'admissible' recognition, classifying the input to a small set of plausible symbols. The symbol recognition program in AUGURS is a neural network similar to the Neocognitron, but is more compact and efficient and having better recognition performance. The main thrust of the AUGURS approach is a novel network structure encoded with general knowledge balancing the discriminant power and the noise tolerance of the network. To handle large symbol sets, another thrust of the AUGURS approach is to construct a network by first building an integrated network from the internal structures of smaller networks trained on sub-tasks, and then pruning unnecessary components from this integrated network. This research contains an extensive empirical study of numerous related work varying conditions and parameters. The results demonstrate the superiority of the AUGURS approach over many alternatives, including Zipcode Nets, an unconstrained network, networks using such invariant features as Zernike moments, pseudo-Zernike moments, normalized moments, and Fourier-Mellin descriptors, the Integrated Neural Network, and the connectionist gluing approach. A practicality analysis shows that AUGURS can handle around 100 symbols, about the size of a discipline library. To enable AUGURS to handle even more symbols, future work is planned to augment it with domain- specific knowledge and other improvements."
Managing Change In A Computer Aided Design Database
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Author : University of California, Berkeley. Computer Science Division
language : en
Publisher:
Release Date : 1987
Managing Change In A Computer Aided Design Database written by University of California, Berkeley. Computer Science Division and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with categories.
An Objet Oriented Data Model For Managing Computer Aided Design And Computer Aided Manufacturing Data Bases
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Author : Stephanie Cammarata
language : en
Publisher:
Release Date : 1986
An Objet Oriented Data Model For Managing Computer Aided Design And Computer Aided Manufacturing Data Bases written by Stephanie Cammarata and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with categories.