搜索结果: 1-15 共查到“知识库 工程图学 based”相关记录25条 . 查询时间(0.328 秒)
Space Deformation of Parametric Surface Based on Extension Function
parametric surface space or free-form deformation extension function
2009/8/19
In this paper, a new technique of space deformation for parametric surfaces with so-called extension function (EF) is presented. Firstly, a special extension function is introduced. Then an operator m...
Exchange of CAD Part Models Based on the Macro-Parametric Approach
CAD exchange of design intents parametric STEP
2009/8/19
It is not possible to exchange parametric information of CAD models based on the current version of STEP. The design intent can be lost during the STEP transfer of CAD models. The Parametrics Group of...
S-CODE: A Subdivision Based Coding System for CAD Models
Subdivision surfaces Surface fitting Approximation Data compression
2009/8/19
A large scale polygon models are often used to approximately represent 3D CAD models in Digital Engineering environment such as DMU (Digital Mockups) and network based collaborative design. However, t...
Generalized Cylinder based on Linear Interpolation by Direction Map
Generalized cylinder Linear interpolation by direction map Developable surface
2009/8/19
We propose two algorithms to generate (1) polygonal meshes and (2) developable surface patches for generalized cylinders defined by contours of discrete curves. To solve the contour blending problem o...
Design of a Feature-based Multi-viewpoint Design Automation System
Computer-aided design Feature-based design Viewpoint dependency
2009/8/19
Viewpoint-dependent feature-based modelling in computer-aided design is developed for the purposes of supporting engineering design representation and automation. The approach of this paper uses a com...
Virtual Presentation and Customization of Products Based on Internet
Product Presentation Product Customization Virtual Reality E-commerce Network
2009/8/19
Through reviewing and comparing the current virtual shopping malls web sites integrated VR into E-commerce, this paper analyzed both the advantages and disadvantages of two kinds of methods for produc...
Ontology-Based Multi-level Knowledge Framework for a Knowledge Management System for Discrete-Product Development
Ontology Knowledge framework Knowledge map Expert system
2009/8/19
This paper introduces an approach to an ontology-based multi-level knowledge framework for a knowledge management system for discrete-product development. Participants in a product life cycle want to ...
Sharing CAD models based on feature ontology of commands history
Feature-based modeling history-based parametric interoperability, ontology
2009/8/19
Different CAx systems are being utilized throughout the product lifecycle due to the practical reasons in the supply chain and design processes. One of the major problems facing enterprises of today i...
Energy based multiple refitting for skinning
Surface approximation Surface skinning Curve compatibility
2009/8/19
The traditional method of manipulation of knots and degrees gives poor quality of surface, if compatibility of input curves is not good enough. In this work, a new algorithm of multiple refitting of c...
Inscribed Approximation based Adaptive Tessellation of Catmull-Clark Subdivision Surfaces
subdivision Catmull-Clark surfaces tessellation surface evaluation
2009/8/19
Catmull-Clark subdivision scheme provides a powerful method for building smooth and complex surfaces. But the number of faces in the uniformly refined meshes increases exponentially with respect to su...
3D Model Retrieval Based on Orthogonal Projections
3D model retrieval orthogonal projections moment invariants
2009/8/19
Recently with the development of 3D modeling and digitizing tools, more and more models have been created, which leads to the necessity of the technique of 3D mode retrieval system. In this paper we i...
Voxel-Based Thickness Analysis of Intricate Objects
CAD/CAM Axis Transformation Thickness Radiography Voxels
2009/8/19
Thickness is a commonly used parameter in product design and manufacture. Its intuitive definition as the smallest dimension of a cross-section or the minimum distance between two opposite surfaces is...
Geometric Hermite Curves Based on Curvature Variation Minimization
curvature variation geometric smoothness Hermite
2009/8/19
Based on the smoothness criterion of minimum curvature variation of the curve, tangent angle constraints guaranteeing an optimized geometric Hermite (OGH) curve both mathematically and geometrically s...
Determination of Optimal Build Orientation Based on Satisfactory Degree Theory for RPT
Rapid Prototyping STL file satisfactory degree multi-objective optimization
2009/8/19
In rapid prototyping, the optimal part orientation during fabrication is critical as it can improve part accuracy, minimize the requirement for supports and reduce the production time. Through investi...
CBAbench: An AutoCAD-based Dynamic Geometric Constraint System
Geometric constraint solving Constraint relation decomposition
2009/8/19
In this paper, an integration framework of Geometric Constraint Solving Engine and AutoCAD is presented, and a dynamic geometric constraint system is introduced. According to inherent orientation feat...