The structure of the modules of the search system by geometric shape based on the repeated use of design knowledge

2021 ◽  
pp. 8-11
Author(s):  
Keyword(s):  
3D Model ◽  
Geometric Shape ◽  
Design Knowledge ◽  
Class Diagram ◽  
Geometric Form ◽  
Search System ◽  
Knowledge Component ◽  
Hu Moments ◽  
Repeated Use

The development of a diagram of the components of a search system by geometric form and a class diagram of obtaining design knowledge using Hu-moments is considered. Keywords: 3D model, PLM, Hu-moments, design knowledge, component diagram. [email protected]

Experimental confirmation of the possibility of using a hydraulic diode in the discharge line of a spur rotary pump

2020 ◽  
pp. 85-88
Author(s):  
D.V. Kondusov ◽  
A.I. Sergeev ◽  
V.B. Kondusova
Keyword(s):  
3D Model ◽  
3D Models ◽  
Geometric Shape ◽  
Experimental Confirmation ◽  
Rotary Pump ◽  
Invariant Moments ◽  
Discharge Line ◽  
Hu Moments

The possibility of using the method of invariant moments of images as a way of comparing the geometric shape of 3D models to search from a database of previously created models is considered. The found models can be used as a prototype for the development of a new part. Keywords 3D-model, contour, contour comparisons, Hu-moments. [email protected]

A Reconfigurable 3D Engineering Shape Search System: Part II — Database Indexing, Retrieval, and Clustering

2003 ◽  
Author(s):  
Kuiyang Lou ◽  
Subramaniam Jayanti ◽  
Natraj Iyer ◽  
Yagnanarayanan Kalyanaraman ◽  
Sunil Prabhakar ◽  
...  
Keyword(s):  
Relevance Feedback ◽  
3D Model ◽  
Feature Vector ◽  
3D Models ◽  
Semantic Gap ◽  
Multidimensional Index ◽  
Search System ◽  
Feature Vectors ◽  
Database Indexing ◽  
Database Clustering

This paper introduces database and related techniques for a reconfigurable, intelligent 3D engineering shape search system, which retrieves similar 3D models based on their shape content. Feature vectors, which are numeric “fingerprints” of 3D models, and skeletal graphs, which are the “minimal representations of the shape content” of a 3D model, represent the shape content. The Euclidean distance of the feature vectors, as well as the distance between skeletal graphs, provides indirect measures of shape similarity between the 3D models. Critical database issues regarding 3D shape search systems are discussed: (a) database indexing, (b) semantic gap, (c) subjectivity of similarity, and (d) database clustering. An Rtree based multidimensional index is used to speed up the feature-vector based search operation, while a decision treebased approach is used for efficiently indexing/searching skeletal graphs. Interactions among users and the search system, such as relevance feedback and feature vector reconfiguration, are used to bridge the semantic gap and to customize the system for different users. Database clustering of the R-tree index is compared with that generated by a selforganizing map (SOM). Synthetic databases and real 3D model databases are employed to investigate the efficiency of the multidimensional index and the effectiveness of relevance feedback.

Development of CAD Model Annotation System Based on Design Intent

2017 ◽  
Vol 863 ◽  
pp. 368-372
Author(s):  
Qin Yi Ma ◽  
Li Hua Song ◽  
Da Peng Xie ◽  
Mao Jun Zhou
Keyword(s):  
Product Design ◽  
3D Model ◽  
Adaptive Design ◽  
Design Knowledge ◽  
Cad Model ◽  
Design Intent ◽  
Design Information ◽  
Annotation System ◽  
Modeling Analysis ◽  
Model Annotation

Most of the product design on the market is variant design or adaptive design, which need to reuse existing product design knowledge. A key aspect of reusing existing CAD model is correctly define and understand the design intents behind of existing CAD model, and this paper introduces a CAD model annotation system based on design intent. Design intents contained all design information of entire life cycle from modeling, analysis to manufacturing are marked onto the CAD model using PMI module in UG to improve the readability of the CAD model. Second, given the problems such as management difficulties, no filter and retrieval functions, this paper proposes an annotation manager system based on UG redevelopment by filtration, retrieval, grouping and other functions to reduce clutter on the 3D annotations and be convenient for users to view needed all kinds of annotations. Finally, design information is represented both internally within the 3D model and externally on a XML file.

scholarly journals RESEARCH ON HISTORIC BIM OF BUILT HERITAGE IN TAIWAN – A CASE STUDY OF HUANGXI ACADEMY

2018 ◽  
Vol XLII-2 ◽  
pp. 615-622 ◽  
Author(s):  
Y. C. Lu ◽  
T. Y. Shih ◽  
Y. N. Yen
Keyword(s):  
Cultural Heritage ◽  
Human Error ◽  
3D Model ◽  
Class Diagram ◽  
Integration Platform ◽  
Built Heritage ◽  
Heritage Buildings ◽  
Study Case ◽  
International Conventions

Digital archiving technology for conserving cultural heritage is an important subject nowadays. The Taiwanese Ministry of Culture continues to try to converge the concept and technology of conservation towards international conventions. However, the products from these different technologies are not yet integrated due to the lack of research and development in this field. There is currently no effective schema in HBIM for Taiwanese cultural heritage. The aim of this research is to establish an HBIM schema for Chinese built heritage in Taiwan. The proposed method starts from the perspective of the components of built heritage buildings, up to the investigation of the important properties of the components through important international charters and Taiwanese laws of cultural heritage conservation. Afterwards, object-oriented class diagram and ontology from the scale of components were defined to clarify the concept and increase the interoperability. A historical database was then established for the historical information of components and to bring it into the concept of BIM in order to build a 3D model of heritage objects which can be used for visualization. An integration platform was developed for the users to browse and manipulate the database and 3D model simultaneously. In addition, this research also evaluated the feasibility of this method using the study case at the Huangxi academy located in Taiwan. The conclusion showed that class diagram could help the establishment of database and even its application for different Chinese built heritage objects. The establishment of ontology helped to convey knowledge and increase interoperability. In comparison to traditional documentation methods, the querying result of the platform was more accurate and less prone to human error.

Method of extracting design knowledge from 3D models

2021 ◽  
pp. 55-56
Author(s):  
Keyword(s):  
Mathematical Description ◽  
Mechanical Engineering ◽  
3D Model ◽  
3D Models ◽  
Design Knowledge ◽  
Model Design ◽  
Deformation Method ◽  
Hu Moment

The mathematical description of extracting design knowledge from 3D-models and methods for comparing the obtained knowledge, used in the search for geometrically similar mechanical engineering products, are considered. Keywords: 3D-model, design knowledge, deformation method, Hu-moment, convolutional neural [email protected]

scholarly journals DETERMINATION OF THE GEOMETRIC FORM OF SCATTERING PARTICLES INSIDE THE POLYMERIC MATRIX

2020 ◽  
pp. 85-95
Author(s):  
Павел Михайлович Пахомов ◽  
Светлана Дмитриевна Хижняк ◽  
Алена Игорьевна Маркова ◽  
Вера Евгеньевна Ситникова
Keyword(s):  
Light Intensity ◽  
Polymer Matrix ◽  
Scattered Light ◽  
Spectroscopic Method ◽  
Polymeric Materials ◽  
Geometric Shape ◽  
Scattered Light Intensity ◽  
Geometric Form ◽  
Filler Particles

В работе предложен новый спектроскопический метод оценки анизометрии и ориентации рассевающих частиц (пор или частиц наполнителя) внутри полимерной матрицы путем построения угловых зависимостей интенсивности рассеянного света. На примере полимерных материалов с различной геометрической формой рассеивающих частиц (частицы наполнителя и поры сферической и вытянутой форм) построены угловые зависимости интенсивности рассеянного света, отражающие геометрическую форму усредненной рассеивающей частицы. A new spectroscopic method is proposed for assessing the anisometry and orientation of scattering particles (pores or filler particles) inside a polymer matrix by constructing angular dependences of the scattered light intensity. On the example of polymeric materials with different geometric shapes of scattering particles (filler particles and pores of spherical and elongated shapes), angular dependences of the scattered light intensity are constructed, which reflect the geometric shape of the averaged scattering particle.

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