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An analysis of geometric modeling in database systems

Alfons Kemper, Mechtild Wallrath
1987 ACM Computing Surveys  
Some of the more recent developments in the area of engineering databases with regard to supporting these representation schemes are then explored, and a classification scheme for technical database management  ...  First, several systems that are extensions to the relational model are surveyed, then the functional data model DAPLEX, the nonnormalized relational model NF', and the database system R2D2 that provides  ...  The central part of such an integrated robotics programming system forms a comprehensive database that stores the so-called world model by describing the physical and geometric properties of real objects  ... 
doi:10.1145/28865.28866 fatcat:r5dvvfarffeyrkknoz6ofxaokq


V. Vereshchaga, Melitopol School of Applied Geometry Zaporizhia National University, Y. Adoniev, Melitopol School of Applied Geometry Zaporizhia National University
2021 Modern problems of modeling  
During the geometrization of the database, two coordinate systems are applied simultaneously by the methods of compositional geometric modeling.  ...  The article proposes a composite geometric method for analysis of information in Big Data sets at the stage of their primary processing and "cleaning".  ...  Here is an example of one of the possible options for geometric analysis of the input database.  ... 
doi:10.33842/2313-125x/2021/20/68/75 fatcat:yh6lwuzt4va33fcevsuxy3q6iu

Template-based traditional building component modelling

Jae Woo Kim, Kyung-Kyu Kang, Ji Hyung Lee
2014 16th International Conference on Advanced Communication Technology  
registered back into the primitive database so that they can be used in creating other templates in the future.  ...  Our system provides easy-to-use editing tool that a user can create the shape of the building component and then the system automatically generate a set of parameters necessary to describe the shape.  ...  Semantic analysis of the system firstly ignores the statements that is irrelevant to the geometric descriptions of the object primitives.  ... 
doi:10.1109/icact.2014.6779043 fatcat:ausa7wjcsvck3olmjfmgit6uua

Research on Technology of Database for the Complex Assembly System

Yunpeng Cai
2014 TELKOMNIKA Indonesian Journal of Electrical Engineering  
A database model supporting complex assembly system was presented based on the requirement analysis of complex assembly system in data storage and extraction.  ...  The distributed database systems supporting static model data and dynamic assembly process data storage constitute the data framework of complex assembly system.  ...  CONCLUSIONS A database model supporting complex assembly system was presented based on the requirement analysis of complex assembly system in data storage and extraction.  ... 
doi:10.11591/telkomnika.v12i4.5003 fatcat:asw66roweng3vgg3bskqcg2lxa

CIF Applications. XI.A La Mode: a ligand and monomer object data environment. I. Automated construction of mmCIF monomer and ligand models

Les Clowney, John D. Westbrook, Helen M. Berman
1999 Journal of Applied Crystallography  
chemical components used as models in the crystallographic refinement of macromolecular structures.  ...  Examples of the application of this system are presented for an intercalating drug component and for a nucleotide unit constructed from independent base, sugar and phosphate components.  ...  We would like to thank Kyle Burkhardt and Glen Charydczak for their help in testing and debugging many of the functions of the A La Mode system.  ... 
doi:10.1107/s0021889898005160 fatcat:m4afnprjx5hwndduf7epszy3gy

WWW-Based Building Information System for "Domus Severiana" Palace at Palatine in Rome by Open Source Software [article]

Katja Heine, Christiane Brasse, Ulrike Wulf
2006 VAST: International Symposium on Virtual Reality  
Above all the 3D-model is the basis of joining the building information system to other sources of information, available in databases: the digital "Raumbuch", which contains all non-geometric information  ...  The aim of this research project is the digital documentation of the "Domus Severiana" Palace at Palatine in Rome through the integration of geometrical 3D- and non-geometrical information.  ...  The project receives many forms of support from the German Archaeological Institute (division Rome). Fritz Thyssen Foundation and Deutsche Forschungsgemeinschaft DFG support the project financially.  ... 
doi:10.2312/vast/vast06/075-082 fatcat:olspz5f4sfeazi2qnlvavt3fgi

A BIM-Based Preliminary Database Framework for Structural Hazard Prevention Analysis

Zhaoqiu Liu, Fei Zhang
2016 Open Civil Engineering Journal  
In this paper, the definitions and rules of geometrical and non-geometrical information of structural components are studied, which play an important part in preventing a building from damage under the  ...  Based on the analysis of information integration mode of BIM, a preliminary database framework of main components is proposed for structural hazard prevention analysis.  ...  Natural Science Foundation of China (project number: 41402270 and 51478408).  ... 
doi:10.2174/1874149501610010695 fatcat:bjq6dwj4srbpjdqse72pbdgyqy

Generation of learning samples for historical handwriting recognition using image degradation

Andreas Fischer, Muriel Visani, Van Cuong Kieu, Ching Y. Suen
2013 Proceedings of the 2nd International Workshop on Historical Document Imaging and Processing - HIP '13  
In this paper, we investigate the use of image degradation to generate synthetic learning samples for historical handwriting recognition.  ...  With respect to three image degradation models, we report significant improvements in accuracy for recognition with hidden Markov models on the medieval Saint Gall and Parzival data sets.  ...  While this problem has been mainly ad-dressed in the context of layout analysis [14] , it has also an e↵ect on learning-based recognition systems.  ... 
doi:10.1145/2501115.2501123 dblp:conf/icdar/FischerVKS13 fatcat:ve64wcdwfzgctm46bi7dvgdjqe

Interactive graphics for geometry generation - A program with a contemporary design

1985 Journal of Aircraft  
Therefore, along with the capability to generate geometric models for the various analysis codes, an effective computational design system must be capable of accommodating multiple input geometry sources  ...  I3G’s database, which contains comipleted geometric modeis, is structured to afford the user ready access to and retrieval of existing models for use in subsequent aerodynamic analysis exercises.  ... 
doi:10.2514/3.45249 fatcat:wif6w34iynherlkdcn7brcncja

Internet-based Distributed Collaborative Engineering Analysis

Qiuli Sun, Kurt Gramoll
2002 Concurrent Engineering - Research and Applications  
This framework includes a 3D virtual world, an online database, multiple multimedia modules, and a distributed collaborative geometric modeling module.  ...  Employing the geometric modeling module, users in the same group can work on the same geometric object at different locations.  ...  Acknowledgement We acknowledge the financial support in part from the National Science Foundation, Grant No. EEC-9872505.  ... 
doi:10.1177/106329302129140232 fatcat:pn6oixhen5e33j2tcih247life

The Automatic Generation of Finite Element Models for Different Analysis Levels

Hideomi Ohtsubo, Katsuyuki Suzuki, Tokimasa Hiraki, Yasumi Kawamura
1994 Journal of the Society of Naval Architects of Japan  
Currently, the finite element models for different analysis level is generated from different geometric model, mainly because the unit geometry of mesh generation is different in each level of the analysis  ...  As an example for demonstration of the present prototype system, input data formulations for different analysis scales are carried out on a 1/2 hold model of a tanker.  ...  Currently, the finite element models for different analysis level is generated from different geometric model, mainly because the unit geometry of mesh generation is different in each level of the analysis  ... 
doi:10.2534/jjasnaoe1968.1994.176_359 fatcat:uej6i6n4pnantckggrl47ox4ua

Contribution to predefinition of the geometric features and their processing sequences in order to create a CAPP model

Iaroslav Francisc Pişec, Florin Sandu Blaga, L. Slătineanu, V. Merticaru, A.M. Mihalache, O. Dodun, M.I. Ripanu, G. Nagit, M. Coteata, M. Boca, R. Ibanescu, C.E. Panait
2018 MATEC Web of Conferences  
The next step in the implementation of the CAPP model, is to create a database for processing sequences associated with geometric features.  ...  In order to create a Computer Aided Process Planning (CAPP) model for a family of parts, it is necessary to establish a database containing the geometric features specific to that family.  ...  Predefinition of the geometric features The procedure for organizing the database for the construction of a real three-dimensional object starts with the analysis of the part model.  ... 
doi:10.1051/matecconf/201817805019 fatcat:7j7sqgpugbga3ocp6krt5ihbyu

SenTion: A framework for Sensing Facial Expressions [article]

Rahul Islam, Karan Ahuja, Sandip Karmakar, Ferdous Barbhuiya
2016 arXiv   pre-print
SenTion employs a novel framework of combining geometric (IVA's) and appearance based features (Histogram of Gradients) to create a hybrid model, that achieves state of the art recognition accuracy.  ...  Facial expressions are an integral part of human cognition and communication, and can be applied in various real life applications.  ...  The use of θ as IVA geometric feature imbibes the scale invariant property of angles in our system.  ... 
arXiv:1608.04489v1 fatcat:zfooccfbafcr5gc6smqcqnvhdu

Construction of a 3D object recognition and manipulation database from grasp demonstrations

David Kent, Morteza Behrooz, Sonia Chernova
2015 Autonomous Robots  
We present an easy-to-use system for constructing object models for 3D object recognition and manipulation made possible by advances in web robotics.  ...  The database consists of point clouds generated using a novel iterative point cloud registration algorithm, and demonstrated grasp poses learned through an online training algorithm.  ...  are not accounted for by the geometric analysis planners.  ... 
doi:10.1007/s10514-015-9451-2 fatcat:j2yx54rer5c2hck467rlv5pyra

3D geo-database research: Retrospective and future directions

Martin Breunig, Sisi Zlatanova
2011 Computers & Geosciences  
In these fields, interdisciplinary research in GIScience and related fields is needed to support the modelling, analysis, management, and integration of large geo-referenced data sets, which describe human  ...  This article first presents a 25-year retrospective of geo-database research. Data modelling, standards, and indexing of geo-data are discussed in detail.  ...  Acknowledgements This article has significantly profited from the comments of the anonymous reviewers. Their help and time invested into the review process are gratefully acknowledged.  ... 
doi:10.1016/j.cageo.2010.04.016 fatcat:jqnllcvu5rfahaxqorotpepavu
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