Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 48 for “"CAD systems"”.
-
Shape optimization using feature-based CAD systems and adjoint methods
… restricting the use of computer-aided design (CAD) models within an optimization framework is that there is no clear definition of how the change in CAD parameters effect the model’s performance in terms of optimizing for certain objective functions (for e.g. minimum pressure loss, minimum …
-
Virtual reality based creation of concept model designs for CAD systems
… integrate the VR environment with a commercial CAD/CAM system in order to demonstrate the practical applications of the research results. The integrated system provides a much more efficient and easy-to-implement process of freeform model creation than employed in current CAD/CAM software. It …
-
Towards a hypermedia approach of data organization in building-modeling CAD systems
The development of architectural CAD systems implies a trend of using a comprehensive building model as the storage space for all relevant data about one design project. Instead of a set of drawing files, a building is represented as a collection of building object data and their relationships. In …
-
Learning from cases : retrieving cases in CAD systems based on design criteria
… proposed in this thesis is a prototype for a CAD system with Case-Based Reasoning to deal with design knowledge. This thesis concentrates on the issues of retrieval within CAD systems using Case-Based Reasoning. Two kinds of retrieval have been developed: Critical Retrieval retrieves cases …
-
CAD systems and communication in design engineering--a test of the information processing model
Thesis (Ph. D.)--Massachusetts Institute of Technology, Sloan School of Management, 1990.
-
Studie zur klinischen Wertigkeit des CAD-Systems in der digitalen Vollfeldmammographie in Abhängigkeit von der Erfahrung des Befunders
… die Anwendung des computerassistierten Diagnosesystems, der Ausbildungsstand der Befunder und das jeweilige Patientenkollektiv auf die Befundungszeit, Trefferquote und Anzahl der falsch-positiven sowie falsch-negativen Markierungen von Mammographieaufnahmen haben. Das Patientenkollektiv bestand …
-
An object-oriented software development environment for geometric modeling in intelligent computer aided design
The concept of intelligent CAD systems to assist a designer in automating the design process has been discussed for years. It has been recognized that knowledge engineering techniques and the study of design theory can provide certain solutions to this approach. A major issue in developing …
-
A PHIGS-based spreadsheet for conceptual design
There are several computer aided design systems which exist to aid the conceptual phase of design. These CAD systems provide adequate geometry input, but often lack the capability to interactively obtain large amounts of numerical and text input often needed by analysis software. An interactive …
-
Tactile, spatial interfaces for computer-aided design : superimposing physical media and computation
Computer-aided design (CAD) systems have become invaluable in three-dimensional creative design fields such as architecture and landscape architecture. However, these digital tools have not replaced the use of physical tools and materials as envisioned by the early developers of CAD. Instead, most …
-
Utilizing Visual Illusions To Identify and Understand Perceptual Discrepancies in Product Design
… design sketches, computer aided design (CAD) models, and physical prototypes (FDM rapid prototyping). A visualization experiment was conducted in which participants were asked to report how they perceived the shape and size of certain features, representing two types of illusions across …
-
Attribution Standardization for Integrated Concurrent Engineering
… iterations, Parametric Computer-Aided Design CAD) systems were introduced. To manage the numerous product design iterations produced by parametric CAD systems, Product Data Management (PDM) systems were developed to capture, document, and manage each product revision. PDM has proved effective …
-
Modeling and sensitivity analysis of aircraft geometry for multidisciplinary optimization problems
… aircraft design utilizes Computer Aided Design (CAD) systems as the source for consistent geometry models across design phases and analysis tools. Yet various challenges inhibit the widespread application of CAD models in aircraft conceptual design because current CAD platforms are not designed …
-
Development of a manufacturing feature-based design system
Traditional CAD systems are based on the serial approach of the product development cycle: the design process is not integrated with other activities and thus it can not provide information for subsequent phases of product development. In order to eliminate this problem, many modern CAD systems …
-
Integration of computer aided design (CAD) technology in apparel design curricula
… study were to assess student attitudes toward CAD technology and use, to determine the efficient use of computer-aided design (CAD) systems in the design curriculum, and to investigate the current use of CAD at other colleges and universities in the United States with apparel design programs. A …
-
Fundamentals of Machine Design and Manufacturing: Design of a Compliant Winding Machine
… of the new machine is presented through using CAD systems and advanced analysis tools, such as Finite Element Analysis, and HEEDS. Resulting, the machine is successfully re-designed to fully control the diameter and the pitch of the product via servo motors and a control panel. The safety and …
-
Competitive Usability Studies of Virtual Environments for Shipbuilding
… of one technology (nonstereoscopic, conventional CAD systems) competed against another (tracked, stereoscopic virtual environments). Competing environments to establish usability features and preferences provides a new tool to the interface designer. Benchmark scenarios were designed and executed …
-
Rule-based fuselage and spine and cross-section methods for computer aided design of aircraft components
… recent years, the use of computer-aided design (CAD) systems for conceptual aircraft design has greatly increased. As a result, new and better methods for creating surface models of aircraft geometry using dimensional parameters are needed. One such method, the Rule-Based Fuselage method, was …
-
Image Features for Tuberculosis Classification in Digital Chest Radiographs
… to human error. Computer-Aided Detection (CAD) systems are a promising machine-learning based solution to automate the diagnosis of TB from CXR images. As the dimensionality of a high-resolution CXR image is very large, image features are used to describe the CXR image in a lower dimension …
-
Distributed & conceptual CAD (DC-CAD) : a new software solution for product design
Many computer aided design (CAD) software packages focus on detailed design and not on early stage, conceptual design. The ability to conceptualize and sketch early versions of a product solution is currently limited to paper and pencil or to inadequate computer-aided industrial design programs …
-
Development of a user interface for processing geometric data from off-the-shelf CAD packages, and motion planning for YAMAHA Zeta-1 deburring robot
… generate tool path for robot manipulators from CAD database. In engineering practice, CAD (Computer-Aided Design) has been utilized in different ways. Some utilize it to produce drawings and document designs. Some may employ it as a visual tool by generating shaded image and animated displays. …
Page 1 of 3