Relevant bibliographies by topics / Computer-aided modeling (CAD)

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Computer-aided modeling (CAD)'

Author: Grafiati
Published: 5 June 2025
Last updated: 9 July 2025

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Journal articles on the topic "Computer-aided modeling (CAD)"

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Wypysiński, Rafał. "Hybrid modeling in CAD." Advanced Technologies in Mechanics 2, no. 1(2) (2015): 15. http://dx.doi.org/10.17814/atim.2015.1(2).14.

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Computer aided 3D modeling is rapidly growing field of techniques. Various mod-eling techniques are continuously developed and improved – but hybrid modeling as combination of the best features seems to be worthy of interest. This article de-scribe main principle of full hybrid modeling with examples of practical applications.
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Kolbasin, Alexander, and Oksana Husu. "Computer-aided design and Computer-aided engineering." MATEC Web of Conferences 170 (2018): 01115. http://dx.doi.org/10.1051/matecconf/201817001115.

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In modern industrial production some of the major factors of successful development include: cost reduction of the production, im-provement of its quality, as well as help to minimise the time in market en-try. Computer-aided design and Computer-aided engineering (CAD / CAE - systems) are the most effective for implementation of these requirements. Possible use of this engineering modeling simulation in conjunction with the power and speed of high performance computing could reduce costs and time of each cycle of designing, and also significantly reduce devel-opment time. The introduction of new technologies, the use of high quality products and engagement of qualified personnel would allow businesses and organizations to get on a path of innovative development of design and production systems.
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Le, Hien Tat, Hung Xuan Nguyen, and Cang Trong Vo. "SURFACE MODELING FOR CAD/CAM BASED ON NURBS." Science and Technology Development Journal 14, no. 4 (2011): 44–52. http://dx.doi.org/10.32508/stdj.v14i4.2006.

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In the digital design process, surface modeling is required to be as accurate as possible for the effective support of production as well as for numerical performance analysis. This article reviews the geometric modeling techniques, based on non-uniform rational B-spline (NURBS). The NURBS surface can be readily translated into many CAD/CAM packages (Computer Aided Design/Computer Aided Manufacturing), which is more convenient for visualization performance and finite element methods.
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Zavanelli, Adriana Cristina, José Vitor Quinelli Mazaro, Caroline Cantieri de Mello, Joel Ferreira Santiago, and Andressa Paschoal Amoroso. "An Esthetics Rehabilitation with Computer-aided Design/ Computer-aided Manufacturing Technology." Journal of Contemporary Dental Practice 15, no. 4 (2014): 506–12. http://dx.doi.org/10.5005/jp-journals-10024-1570.

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ABSTRACT Aim This paper describes a case of a rehabilitation involving Computer Aided Design/Computer Aided Manufacturing (CADCAM) system in implant supported and dental supported prostheses using zirconia as framework. Background The CAD-CAM technology has developed considerably over last few years, becoming a reality in dental practice. Among the widely used systems are the systems based on zirconia which demonstrate important physical and mechanical properties of high strength, adequate fracture toughness, biocompatibility and esthetics, and are indicated for unitary prosthetic restorations and posterior and anterior framework. Case description All the modeling was performed by using CAD-CAM system and prostheses were cemented using resin cement best suited for each situation. Conclusion The rehabilitation of the maxillary arch using zirconia framework demonstrated satisfactory esthetic and functional results after a 12-month control and revealed no biological and technical complications. Clinical significance This article shows the important of use technology CAD/CAM in the manufacture of dental prosthesis and implant-supported. How to cite this article Mazaro JVQ, Mello CC, Zavanelli AC, Santiago JF Jr, Amoroso AP, Pellizzer EP. An Esthetics Rehabilitation with Computer-aided Design/Computer-aided Manufacturing Technology. J Contemp Dent Pract 2014;15(4): 506-512.
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Khojimuradov Burkhan Ravshanovich. "CAD/CAM – MANUFACTURE OF ORTHOPEDIC STRUCTURES." Sciental Journal of Education Humanities and Social Sciences 3, no. 2 (2025): 18–24. https://doi.org/10.62536/sjehss.2025.v3.i2.pp18-24.

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Imagine that in one step you make an impression, simulate a restoration and install a crown for the patient. Fiction? No, this is the same CAD/CAM system — Computer Assisted Design/Computer Aided Manufacturing or a system for computer modeling and manufacturing dentures.
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Horváth, László, and Imre J. Rudas. "Emerging Intelligent Technologies in Computer-Aided Engineering." Journal of Advanced Computational Intelligence and Intelligent Informatics 4, no. 4 (2000): 268–78. http://dx.doi.org/10.20965/jaciii.2000.p0268.

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Competition generated the requirement of quick decisions at engineering activities. As a consequence, application of advanced computer modeling in engineering design needs application of intelligent computer methods to assist human decision making. A powerful CAD/CAM system with a comprehensive range of sophisticated modeling tools for describing engineering objects and programming tools for creating modeling procedures constitutes an appropriate environment to accept intelligent methods. The only way of survival for companies producing mechanical products on the competitive edge seems application of advanced modeling together with intelligent decision making. Much modeling, problem solving, database handling, visualization and other methods are involved in a typical computer-based engineering process. This process recently relies upon an integrated set of modeling tools and an integrated product database. Involving intelligent computer methods is a great challenge in this field. This paper surveys advanced modeling from the point of view of application of intelligent methods. It is organized as follows. A characterization of state of the art in advanced engineering modeling reveals important issues to be discussed in this paper. Following this, worldwide network-based group work of engineers is discussed. Human computer interaction (HCI) and network communication methods as important aspects of computer-aided engineering are outlined. Then recent development results in modeling of mechanical systems with special emphasis on integrated modeling of mechanical products, especially well-engineered shapes, are introduced. Finally, virtual manufacturing as an area of involving intelligent methods in CAD/CAM technology is discussed.
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Eltaief, Ameni, Sabrine Ben Amor, Borhen Louhichi, Nashmi H. Alrasheedi, and Abdennour Seibi. "Automated Assessment Tool for 3D Computer-Aided Design Models." Applied Sciences 14, no. 11 (2024): 4578. http://dx.doi.org/10.3390/app14114578.

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Computer-aided design (CAD) has become an integral part of engineering education, particularly for those studying mechanical engineering. By providing practical skills that are highly valued in the engineering industry, proficiency in CAD systems enhances students’ employability. Generally, CAD systems provide students with the tools and knowledge necessary to excel in their engineering education and future careers. In order to help teachers to give the best training to their students and to make the right evaluations, an automatized tool is needed to support the evaluation of CAD models during training sessions. After an extensive bibliographical search, this paper proposes a CAD Model Automatized Assessment (MAA) Tool for mechanical courses called the CAD MAA Tool. This tool is mainly based on a developed model that takes into account different aspects of modeling, such as geometric, feature-based, and parametric modeling. To correctly evaluate a given part compared to a reference one, the proposed model uses different coefficients fixed by the teacher according to their teaching strategies or course objectives.
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Li, Xueyang, Yunzhong Lou, Yu Song, and Xiangdong Zhou. "Mamba-CAD: State Space Model for 3D Computer-Aided Design Generative Modeling." Proceedings of the AAAI Conference on Artificial Intelligence 39, no. 5 (2025): 5013–21. https://doi.org/10.1609/aaai.v39i5.32531.

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Computer-Aided Design (CAD) generative modeling has a strong and long-term application in the industry. Recently, the parametric CAD sequence as the design logic of an object has been widely mined by sequence models. However, the industrial CAD models, especially in component objects, are fine-grained and complex, requiring a longer parametric CAD sequence to define. To address the problem, we introduce Mamba-CAD, a self-supervised generative modeling for complex CAD models in the industry, which can model on a longer parametric CAD sequence. Specifically, we first design an encoder-decoder framework based on a Mamba architecture and pair it with a CAD reconstruction task for pre-training to model the latent representation of CAD models; and then we utilize the learned representation to guide a generative adversarial network to produce the fake representation of CAD models, which would be finally recovered into parametric CAD sequences via the decoder of Mamba-CAD. To train Mamba-CAD, we further create a new dataset consisting of 77,078 CAD models with longer parametric CAD sequences. Comprehensive experiments are conducted to demonstrate the effectiveness of our model under various evaluation metrics, especially in the generation length of valid parametric CAD sequences.
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Xu, Jianfei, S. M. AbouRizk, and Cam Fraser. "Integrated three-dimensional computer-aided design and discrete-event simulation models." Canadian Journal of Civil Engineering 30, no. 2 (2003): 449–59. http://dx.doi.org/10.1139/l02-110.

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Three-dimensional computer-aided design (3D-CAD) systems that integrate critical path method (CPM) algorithms, commonly referred to as four-dimensional computer-aided design (4D-CAD), have received a high level of interest over the past few years due to the insight they offer into constructability and feasibility analysis. This paper outlines an approach that facilitates this modeling method through integration between a commercial 3D-CAD software package and a discrete-event simulation tool. This approach employs a product-based modeling method that integrates simulation models with CAD drawings to provide real-time analysis and improved model accuracy in modeling construction operations. By integrating with 3D-CAD drawings, the models require much less data entry and provide a much higher degree of accuracy. Additionally, during the course of a project, resource and time consumption data can be collected and used to continually update the model, minimizing the use of assumptions and generalized data. This paper provides a short background and literature review to contextualize the problem statement, describes the product atomic component (PAC) used to integrate 3D-CAD and the simulation model, outlines some of the implementation issues in a simulation context, and presents a prototype system with an example application for an earthmoving project.Key words: 4D-CAD, CPM, product atomic component, simulation modeling, integration, earthmoving.
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Chen, Lei, and Ming Ran Deng. "Study on Three-Dimension Computer Aided Process Planning System." Applied Mechanics and Materials 121-126 (October 2011): 1316–20. http://dx.doi.org/10.4028/www.scientific.net/amm.121-126.1316.

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Aiming at the problem of process data update and working procedure model, the three-dimension CAPP (Computer Aided Process Planning) based on three-dimension CAD (Computer Aided Design) is proposed. The core of the system is the process model that is used to transfer data between CAPP and CAD system. This system can solve the problem of two-dimension CAPP based on parameter feature modeling of three-dimension CAD and has been applied to some aviation enterprises in china.
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Dissertations / Theses on the topic "Computer-aided modeling (CAD)"

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Gandhi, Ashit R. "Feature-based geometric modeling using B-spline surfaces and a natural language approach." Diss., Virginia Polytechnic Institute and State University, 1989. http://hdl.handle.net/10919/54359.

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Traditionally, design geometries are represented using orthographic views which require a human being to interpret them and recognize geometric features to evaluate the design. Solid modeling systems have made the task somewhat easier, but they often require tedious and complex operations using simple geometric primitives. This has led to investigation of modeling systems which allow the creation of assemblies the way engineers conceive them - as features. To be able to efficiently describe models in terms of features, a rich set of feature descriptors are necessary. An exhaustive study of English words describing form, shape, feature, shape altering transformations and surface conditions was done to establish a wide vocabulary for feature based description. Classification based on topology and form was done and prototype constraint relations were implemented to differentiate between some features. A feature is created from a topological group by computing points and interpolating them with uniform rational B-spline patches. Control points needed to compute the patches are computed from the interpolation points by an inverse relation. A designer-oriented modeling language, based on simple English syntax, was devised to specify procedures to be executed by the modeler in order to create features using minimal user input.<br>Ph. D.
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Elmubarak, Mona. "Accuracy and reliability of traditional measurement techniques for tooth widths and arch perimeter compared to CAD/CAM." University of the Western Cape, 2018. http://hdl.handle.net/11394/6521.

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>Magister Scientiae - MSc<br>Background: Plaster models form an integral part of the traditional orthodontic records. They are necessary for diagnosis and treatment planning, case presentations as well as for the evaluation of treatment progress. The accuracy of the measurements taken for space assessment is crucial prior to treatment planning. The introduction of digital models overcomes some problems experienced with plaster models. Digital models have shown to be an acceptable alternative for plaster models. Aim: The aim of the study was to determine the accuracy of traditional measurement techniques when compared to the CAD/ CAM measurements in the assessment of tooth widths and arch perimeter from plaster models. Method: The mesio-distal tooth widths and arch perimeter of thirty archived plaster models were measured using a digital caliper to the nearest 0.01 mm and divider to the nearest 0.1 mm. Corresponding digital models were produced by scanning them with a CAD/CAM (InEos X5) and space analysis completed by measurements using InEos Blue software. Measurements were repeated after 1 week from the initial measurement. The methods were compared using descriptive analysis (mean difference and standard deviation). Results: The operator reliability was high for digital models as well as the plaster models when the measurement tool was the digital caliper (analyzed using the Pearson correlation coefficient in the paired t-test). The mean values of tooth widths measurements of CAD/CAM, digital caliper and divider were 6.82 (±0.04), 6.94 (± 0.04) and 7.11 (± 0.04). There was a significant difference between the measurements made by the CAD/CAM and the divider. Additionally significant differences between the measurements by digital caliper and divider measurements (p < 0.05) were observed. No significant difference was found when comparing CAD/CAM to digital caliper. Positive correlation was displayed between CAD/CAM, digital caliper and the divider, but the measurements completed with the digital caliper had the highest correlation with the CAD/CAM. The difference was not significant between the aforementioned measurement tools (p > 0.05). Arch perimeter measurements showed no statistical significant difference between CAD/CAM, digital caliper and divider (p < 0.05). Conclusion: Archived plaster models stored as records can be converted to digital models as it will have the same accuracy of measurements. The value of doing a space analysis with the CAD/CAM system can be performed with similar reliability on the digital models as a caliper on plaster models.
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Rajab, Khairan. "Knowledge Guided Non-Uniform Rational B-Spline (NURBS) for Supporting Design Intent in Computer Aided Design (CAD) Modeling." Scholar Commons, 2011. http://scholarcommons.usf.edu/etd/3302.

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For many years, incompatible computer-aided design (CAD) packages that are based on Non-uniform Rational B-Spline (NURBS) technology carried out the exchange of models and data through either neutral file formats (IGES or STEP) or proprietary formats that have been accepted as quasi industry standards. Although it is the only available solution at the current time, the exchange process most often produces unsatisfactory results. Models that are impeccable in the original modeling system usually end up with gaps or intersections between surfaces on another incompatible system. Issues such as loss of information, change of data accuracy, inconsistent tolerance, and misinterpretation of the original design intent are a few examples of problems associated with migrating models between different CAD systems. While these issues and drawbacks are well known and cost the industry billions of dollars every year, a solution to eradicate problems from their sources has not been developed. Meanwhile, researchers along with the industries concerned with these issues have been trying to resolve such problems by finding means to repair the migrated models either manually or by using specialized software. Designing in recent years is becoming more knowledge intensive and it is essential for NURBS to take its share of the ever increasing use of knowledge. NURBS are very powerful modeling tools and have become the de facto standard in modeling. If we stretch their strength and make them knowledge driven, benefits beyond current expectations can be achieved easily. This dissertation introduces knowledge guided NURBS with theoretical and practical foundations for supporting design intent capturing, retrieval, and exchange among dissimilar CAD systems. It shows that if NURBS entities are tagged with some knowledge, we can achieve seamless data exchange, increase robustness, and have more reliable computations, all of which are ultimate objectives many researchers in the field of CAD have been trying to accomplish for decades. Establishing relationships between a NURBS entity and its origin and destinations can aid with seamless CAD model migration. The type of the NURBS entity and the awareness of any irregularities can lead to more intelligent decisions on how to proceed with many computations to increase robustness and achieve a high level of reliability. As a result, instead of having models that are hardly modifiable because of migrating raw numerical data in isolation, the knowledge driven migration process will produce models that are editable and preserve design intent. We have addressed the issues not only theoretically but also by developing a prototype system that can serve as a test bed. The developed system shows that a click of a button can regenerate a migrated model instead of repairing it, avoiding delay and corrective processes that only limit the effective use of such models.
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Vij, Lokesh. "Computer aided modeling of proteins and prediction of their 3-D structure using neural networks." Ohio : Ohio University, 1993. http://www.ohiolink.edu/etd/view.cgi?ohiou1176312284.

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Cingi, Guney. "The Influence Of Digital Technologies On The Interaction Of Design And Manufacturing Processes." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12606944/index.pdf.

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This study aims to analyze and evaluate the influence of digital technologies on the inter-action of design and manufacturing processes by representing an outlook of digital tech-nologies through developments in modeling capabilities, manufacturing techniques, mate-rial science, and design strategies. The digital era reached by the technological developments in different fields of sci-ence influenced the field of architecture, just like the others. Thus, a new kind of spa-tial and tectonic quality in architecture is emerging with the lately introduced design tools and materials that are novel to the building industry, while redefining the role of architect in this contemporary medium. The evolutionary process of Frank O. Gehry and his office, being a pioneer in using digital design and manufacturing tools in architecture, is represented with realized examples that point out the formerly discussed developments in the realm of architecture and visualize the tectonics of the digitally designed and produced buildings<br>culminating with the case study of Guggenheim Museum, Bilbao.
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Du, Plooy Elsje. "3-D Computer-aided Design (CAD) and Computer Numerical Control (CNC) milling : An alternative to traditional ceramics master moulding technology." Thesis, Bloemfontein: Central University of Technology, Free State, 2014. http://hdl.handle.net/11462/236.

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Thesis (M. Tech. (Design and Studio Art)) -- Central University of Technology, Free State, 2014<br>This quantitative research project investigates the utilization of emerging technologies within the arts with a view on establishing an interdisciplinary approach between ceramics and engineering. The traditional manufacturing method of producing master moulds is a time-consuming process for the studio ceramicist. This study explores whether computer-aided design (CAD) and computer numerical control (CNC) milling can accelerate the design and manufacturing process when developing master moulds as an alternative to using traditional methods. It investigates whether SolidWorks® can be applied as a suitable CAD design tool for the creation of ceramic vessel forms in order to reduce the design development time frame. It furthermore investigates whether CNC milling can be used as a viable manufacturing technology for the making of vessel prototypes and master moulds from CAD data, the overall objective being to improve and accelerate the plaster of Paris master mould manufacturing process for the batch production of studio-based ceramic artefacts. Findings from this study indicate that emerging technologies have a lot to offer the artist when it comes to providing new possibilities for the creation of artefacts and that SolidWorks® and CNC milling can be utilized as a viable interdisciplinary manufacturing approach between ceramics and digital manufacturing technologies.
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Ozkan, Sevda. "The Way Architectural Model As A New Collaborative Design Environment Talks With Machines." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12609381/index.pdf.

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The scope of this study is to illustrate the relationship between computer-aided design (CAD) and computer-aided manufacturing (CAM) systems, and to show how architectural modeling should be positioned in the process of computer-aided design/computer-aided manufacturing (CAD/CAM) systems. The integration of computer aided technologies with architectural design is investigated in terms of design-production/fabrication interaction. The research has been based on a case study in which the CAD/CAM process from the initial design phase to the actual manufacturing of the design object has been explored. A design object is modeled using CAD and the model is manufactured using CAM in order to illustrate the process of CAD/CAM and its potentials related to architectural design and the construction/manufacturing/fabrication process of building. Thus, the study tries to demonstrate what digital tools can provide to the field of architecture, and lists the requirements for architectural modeling to acquire compatibility among the parts of the building process.
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Chen, Kenway. "MCAD - ECAD integration : constraint modeling and propagation /." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26484.

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Thesis (M. S.)--Mechanical Engineering, Georgia Institute of Technology, 2009.<br>Committee Chair: Schaefer, Dirk; Committee Member: Panchal, Jitesh; Committee Member: Paredis, Chris; Committee Member: Rosen, David; Committee Member: Yoder, Douglas. Part of the SMARTech Electronic Thesis and Dissertation Collection.
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Larson, Brady M. "Exploring the Common Design Space of Dissimilar Assembly Parameterizations for Interdisciplinary Design." Diss., CLICK HERE for online access, 2008. http://contentdm.lib.byu.edu/ETD/image/etd2368.pdf.

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Bhattacharyya, Arkaprava. "Non quasi-static effects investigation for compact bipolar transistor modeling." Thesis, Bordeaux 1, 2011. http://www.theses.fr/2011BOR14294/document.

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Les transistors rapides actuels présentent un retard lorsqu’ils fonctionnent à très hautes fréquences ou en régime transitoire rapide. Cet effet est appelé effet non quasi-statique (NQS). Dans cette thèse, l’effet NQS est analysé de manière concise de façon à être directement implanté dans les modèles de composant pour les bibliothèques de circuit en utilisant le langage standard VerilogA. Les mécanismes physiques à la base de l’effet NQS sont évalués dans le domaine de fonctionnement petit signal et les résultats sont comparés aux travaux déjà publiés. S’agissant du modèle standard bipolaire HICUM, les effets NQS latéraux et verticaux sont examinés séparément à partir du même modèle, en régime de fonctionnement transitoire et fréquentiel grâce à un sous-circuit dédié au calcul de la phase du signal. A partir de ce sous-circuit, la modélisation compacte avec HICUM est comparée aux données issues de mesures et issues de simulation amont. Enfin, un nouveau sous-circuit calculant l’excès de phase est proposé pour prendre mieux en compte les effets non quasi-statiques dans les transistors bipolaires<br>Modern high speed (RF) transistors encounter certain delay while operated at high frequency or under fast transient condition. This effect is named as Non Quasi Static (NQS) effect. In the current work, NQS effect is analyzed in a concise manner so that it can be readily implemented in a compact model using the VerilogA description language. The basic physics behind this effect is investigated in small signal domain and the results are compared with the published work. In popular bipolar model HICUM lateral and vertical NQS are examined separately and uses the same model for both transient and AC operation which requires an additional minimum phase type sub circuit. Compact modeling with HICUM model is performed in both measurement and device simulated data. At last, an improved excess phase circuit is proposed to model the NQS effect
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Books on the topic "Computer-aided modeling (CAD)"

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Engineers, Society of Automotive, and SAE World Congress (2007 : Detroit, Mich.), eds. CAD/CAM/CAE technology, digital modeling, virtual development and engineering. Society of Automotive Engineers, 2007.

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Snyder, John M. Generative modeling for computer graphics and CAD: Symbolic shape design using interval analysis. Academic Press, 1992.

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Sendler, Ulrich. CAD & office integration: OLE for design and modeling--a new technology for CA-software. Springer, 1996.

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Cárdenas, Carlos Andrés. Modeling strategies: Parametric design & fabrication in architectural practice. Department of Architecture, Graduate School of Design, 2007.

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Trond, Ytterdal, and Shur Michael, eds. Introduction to device modeling and circuit simulation. Wiley, 1998.

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Stewart, Michael D. Modeling for design using AutoCAD 12, AME, and AutoSurf. PWS Pub. Co., 1996.

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Kuneš, Josef. Similarity and Modeling in Science and Engineering. Cambridge International Science Publishing Ltd, 2012.

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1960-, Elber Gershon, Shapiro Vadim, and SIGGRAPH, eds. Proceedings: Eighth ACM Symposium on Solid Modeling and Applications : SM '03 : June 16-20, 2003, Seattle, Washington, USA. Association for Computing Machinery, 2003.

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Shen, Ruijing. Statistical Performance Analysis and Modeling Techniques for Nanometer VLSI Designs. Springer US, 2012.

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IFIP TC5/WG5.2 Working Conference on Geometric Modeling for Product Engineering (1990 Rensselaerville, N.Y.). Product modeling for computer-aided design and manufacturing: Selected and expanded papers from the IFIP TC5/WG5.2 Working Conference on Geometric Modeling for Product Engineering, Rensselaerville, U.S.A., 17-21 June 1990. North-Holland, 1991.

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Book chapters on the topic "Computer-aided modeling (CAD)"

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Hirz, Mario, Wilhelm Dietrich, Anton Gfrerrer, and Johann Lang. "Modeling Techniques in CAD." In Integrated Computer-Aided Design in Automotive Development. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-11940-8_4.

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Li, Xueyang, Haotian Chen, Yunzhong Lou, and Xiangdong Zhou. "CF-CAD: A Contrastive Fusion Network For 3D Computer-Aided Design Generative Modeling." In Lecture Notes in Computer Science. Springer Nature Singapore, 2025. https://doi.org/10.1007/978-981-97-5555-4_31.

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Iyer, Vishwanath, William A. Wartman, Aapo Nummenmaa, and Sergey N. Makarov. "Example of Steady-State Electric-Current Modeling of a Complicated Cellular Topology with Boundary Element Fast Multipole Method." In Brain and Human Body Modeling 2020. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-45623-8_23.

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AbstractIn this study, we demonstrate the ability of the boundary element fast multipole method (BEM-FMM) to perform electrical modeling of a rather complicated microbiological surface topology in a reasonable amount of time. As an example, we consider a Computer Aided Design (CAD)-based SARS-CoV-2 spike glycoprotein structure. This structure is crucial to the mechanism by which the coronavirus attaches to a target object. Only classic DC steady-state modeling has been performed, in an isotropic continuous medium.
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Huang, Yu-Chun, and Kuan-Lin Chen. "Brain-Computer Interfaces (BCI) Based 3D Computer-Aided Design (CAD): To Improve the Efficiency of 3D Modeling for New Users." In Augmented Cognition. Enhancing Cognition and Behavior in Complex Human Environments. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-58625-0_24.

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Noetscher, Gregory, Peter Serano, Ara Nazarian, and Sergey Makarov. "Computational Tool Comprising Visible Human Project® Based Anatomical Female CAD Model and Ansys HFSS/Mechanical® FEM Software for Temperature Rise Prediction Near an Orthopedic Femoral Nail Implant During a 1.5 T MRI Scan." In Brain and Human Body Modelling 2021. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-15451-5_9.

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AbstractThis medical device development tool (MDDT) is categorized as a non-clinical assessment model (NAM). This MDDT is a computational modeling and simulation tool. It can predict heating of metallic orthopedic implants with the radio frequency (RF) electromagnetic fields in the magnetic resonance imaging (MRI) coils while targeting a mid-aged and elderly female population primarily affected by osteoporosis and the associated bone fracture.This MDDT uses a high resolution anatomical female CAD (computer aided design) model coupled with the proven multiphysics finite element method (FEM) software (Ansys Workbench) to simulate the complete MRI environment. The environment is consisting of a tuned MRI coil with the given output power, detailed heterogeneous human model within the coil at the given landmark and a properly embedded metallic implant within the anatomical model to compute the extent of heating generated around the implant.Specifically, this MDDT is the in silico analog of an MRI scan for an elderly female subject with a metallic orthopedic implant at 1.5 T in a full-body birdcage RF coil.
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Portman, V. T., and R. D. Weill. "Modelling spatial dimensional chains for CAD/CAM applications." In Computer-aided Tolerancing. Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-1529-9_5.

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Bähr, Philipp, Lukas Leidinger, Silke Sommer, and Stefan Hartmann. "Validation of the *CONSTRAINED_SPR3 Joint Formulation for Isogeometric Shell Models." In ARENA2036. Springer Nature Switzerland, 2025. https://doi.org/10.1007/978-3-031-88831-1_2.

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Abstract Isogeometric Analysis (IGA) uses higher-order and higher-continuity spline basis functions known from Computer Aided Design (CAD) to describe the geometry and the solution field of the simulation model (mainly Non-Uniform Rational B-splines). This leads to a more accurate geometry description, a smooth solution field and therefore superior simulation properties compared to traditional Finite Element Analysis (FEA). Using the same geometry description for CAD and IGA also speeds up the modeling process for the simulation. Real components consist of multiple sheet metal parts connected by point-like joints (spot-welds, rivets, screws). These joints significantly influence the component behaviour under crash load. Therefore, their properties must be accurately described within the component simulation. Due to minimum time step requirements a detailed modelling of every single joint is impossible. Thus, substitute models are used in component simulations, which describe the joints behaviour based on constrained conditions between the joining partners. However, these substitute models are developed for traditional FEA. To enable the application of IGA to vehicle simulations, this paper investigates whether existing constrained-based substitute models (e.g. *CONSTRAINED_SPR3 spotweld elements) can be combined with isogeometric shell models without further modifications. Therefore, specimen and component tests are simulated with IGA and FEA. The simulation results are compared to each other as well as experimental test results. It can be shown that IGA achieves a very good agreement with the experimental results, with a prediction quality comparable to the traditional FEA. This allows a straightforward replacement of existing FEA shell components with their IGA counterparts in vehicle simulations.
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Wang, Jiawan, Wenxia Liu, Muzimiao Zhang, et al. "Scenario-Based Flexible Modeling and Scalable Falsification for Reconfigurable CPSs." In Computer Aided Verification. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-65633-0_15.

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AbstractCyber-physical systems (CPSs) are used in many safety-critical areas, making it crucial to ensure their safety. However, with CPSs increasingly dynamically deployed and reconfigured during runtime, their safety analysis becomes challenging. For one thing, reconfigurable CPSs usually consist of multiple agents dynamically connected during runtime. Their highly dynamic system topologies are too intricate for traditional modeling languages, which, in turn, hinders formal analysis. For another, due to the growing size and uncertainty of reconfigurable CPSs, their system models can be huge and even unavailable at design time. This calls for runtime analysis approaches with better scalability and efficiency. To address these challenges, we propose a scenario-based hierarchical modeling language for reconfigurable CPS. It provides template models for agent inherent features, together with an instantiation mechanism to activate single agent’s runtime behavior, communication configurations for multiple agents’ connected behaviors, and scenario task configurations for their dynamic topologies. We also present a path-oriented falsification approach to falsify system requirements. It employs classification-model-based optimization to explore search space effectively and cut unnecessary system simulations and robustness calculations for efficiency. Our modeling and falsification are implemented in a tool called . Experiments have shown that it can largely reduce modeling time and improve modeling accuracy, and perform scalable CPS falsification with high success rates in seconds.
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Chiari, Michele, Luca Geatti, Nicola Gigante, and Matteo Pradella. "SMT-Based Symbolic Model-Checking for Operator Precedence Languages." In Computer Aided Verification. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-65627-9_19.

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AbstractOperator Precedence Languages (OPL) have been recently identified as a suitable formalism for model checking recursive procedural programs, thanks to their ability of modeling the program stack. OPL requirements can be expressed in the Precedence Oriented Temporal Logic (), which features modalities to reason on the natural matching between function calls and returns, exceptions, and other advanced programming constructs that previous approaches, such as Visibly Pushdown Languages, cannot model effectively. Existing approaches for model checking of have been designed following the explicit-state, automata-based approach, a feature that severely limits their scalability. In this paper, we give the first symbolic, SMT-based approach for model checking properties. While previous approaches construct the automaton for both the formula and the model of the program, we encode them into a (sequence of) SMT formulas. The search of a trace of the model witnessing a violation of the formula is then carried out by an SMT-solver, in a Bounded Model Checking fashion. We carried out an experimental evaluation, which shows the effectiveness of the proposed solution.
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Cauli, Claudia, Meng Li, Nir Piterman, and Oksana Tkachuk. "Pre-deployment Security Assessment for Cloud Services Through Semantic Reasoning." In Computer Aided Verification. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-81685-8_36.

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Abstract Over the past ten years, the adoption of cloud services has grown rapidly, leading to the introduction of automated deployment tools to address the scale and complexity of the infrastructure companies and users deploy. Without the aid of automation, ensuring the security of an ever-increasing number of deployments becomes more and more challenging. To the best of our knowledge, no formal automated technique currently exists to verify cloud deployments during the design phase. In this case study, we show that Description Logic modeling and inference capabilities can be used to improve the safety of cloud configurations. We focus on the Amazon Web Services (AWS) proprietary declarative language, CloudFormation, and develop a tool to encode template files into logic. We query the resulting models with properties related to security posture and report on our findings. By extending the models with dataflow-specific knowledge, we use more comprehensive semantic reasoning to further support security reviews. When applying the developed toolchain to publicly available deployment files, we find numerous violations of widely-recognized security best practices, which suggests that streamlining the methodologies developed for this case study would be beneficial.
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Conference papers on the topic "Computer-aided modeling (CAD)"

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Datta, Anubhav, William Staruk, and Inderjit Chopra. "Three-Dimensional CAD-Based Structural Modeling for Next Generation Rotor Dynamic Analysis." In Vertical Flight Society 70th Annual Forum & Technology Display. The Vertical Flight Society, 2014. http://dx.doi.org/10.4050/f-0070-2014-9503.

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This paper describes the generation of three-dimensional structural models for systems of multiple flexible bodies. These models are to be analyzed using a next generation, high-fidelity, multibody solver that treats flexible parts with full 3-D finite element analysis. A workflow for creating these models has been developed and is described in detail, starting from geometry created using computer aided design (CAD) tools, proceeding to structural analysis representations, finite element discretization of the flexible components, and definitions of joints and devices to form a final structural analysis model. Three rotor configuration models have been created: a bearingless rotor, an articulated rotor, and a teetering rotor. Initial static and dynamic analyses of these rotors have been performed, verifying the proper integration of the new structural models with the solver. Though this paper focuses on the creation of helicopter rotor models, the method is general and may be applied to many different structural assemblies.
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Midura, Theodore, and Matthew Darois. "Metallic Density Mapping – Buried Piping Network Digital Twin Modeling CP Current Requirements." In CONFERENCE 2025. AMPP, 2025. https://doi.org/10.5006/c2025-00061.

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Abstract This paper describes a methodology to develop a digital twin of the buried assets of a complex plant environment by mapping the metallic surface area buried throughout the facility. This digital twin can be utilized to calculate the current required for cathodic protection of buried piping. On a broader scale, this system can be used to identify areas of a plant where buried metallic interferences may prevent new piping installation, complicate excavations, or generate heightened risk for grounding and electrical safety. This methodology has been applied at various nuclear power plants where complex buried assets present challenges to modeling corrosion and piping integrity. This application employed the use of geographic information systems (GIS), computer aided design (CAD), and building information systems (BIM) to develop digital twins to support characterization and decommissioning of complex nuclear sites.
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Nagali, Vanisha S., and Rohan Deb. "Modeling Historical Devices Using Computer Aided Design (CAD)." In 2022 IEEE Integrated STEM Education Conference (ISEC). IEEE, 2022. http://dx.doi.org/10.1109/isec54952.2022.10025157.

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Wang, Yigang, Wanbin Pan, Linqiang Chen, and Jun Zhang. "3D CAD Modeling Using Automatically Reconstructable Assemblies." In 2007 10th IEEE International Conference on Computer-Aided Design and Computer Graphics. IEEE, 2007. http://dx.doi.org/10.1109/cadcg.2007.4407892.

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Zhang, Kai-Ke, Kai-Mo Hu, Li-Cheng Yin, Dong-Ming Yan, and Bin Wang. "CAD Parts-Based Assembly Modeling by Probabilistic Reasoning." In 2015 14th International Conference on Computer-Aided Design and Computer Graphics (CAD/Graphics). IEEE, 2015. http://dx.doi.org/10.1109/cadgraphics.2015.29.

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Nanjundaswamy, V. G., Amit Kulkarni, Zhuo Chen, et al. "Intuitive 3D Computer-Aided Design (CAD) System With Multimodal Interfaces." In ASME 2013 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/detc2013-12277.

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The existing interfaces for 3D CAD modeling softwares use 2D subspace inputs such as x and y axes of mouse to create 3D models. These existing interfaces are inherently modal because one needs to switch between subspaces, and disconnects the input space from modeling space. This makes existing interfaces tedious, complex, non-intuitive and difficult to learn. In this paper, a multi-sensory, interactive, and intuitive 3D CAD modeling interface is presented to address these shortcomings. Three different modalities (gestures, brain-computer interface, and speech) have been used for creating interactive and intuitive 3D CAD modeling interface. DepthSense® camera from SoftKinetic is used to recognize gestures, EEG Neuro-headset from Emotiv® is used for acquiring, and processing neuro-signals and CMU Sphinx is used for recognizing and processing speech. Multiple CAD models created by several users using the proposed multi-modal interface are presented. In conclusion, the proposed system is easier to learn and use as compared to the already existing systems.
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Yuehong Tang, Youtai Lu, and Bo Song. "CAD modeling for tubes in industrial design." In 2009 IEEE 10th International Conference on Computer-Aided Industrial Design & Conceptual Design. IEEE, 2009. http://dx.doi.org/10.1109/caidcd.2009.5375440.

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Nonaka, Norihiko, and Ichirou Nishigaki. "An Automatic Technique for CAE Analysis With a 3D-CAD Model." In ASME 2002 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/detc2002/cie-34486.

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A CAE (computer-aided engineering) analysis system, consisting of a 3D-CAD (three-dimensional computer-aided design) modeler, a pre-processor, an analysis solver, and a post-processor, was developed. This system uses automated procedures for solid modeling, definition of analysis models (i.e., defining boundary conditions and material properties, traditionally done manually), mesh generation, numerical simulation, and visualization of results. The CAE analysis system has two key features: it can greatly reduce the analysis time, and it uses a 3D-CAD model as the geometric model for numerical analysis. It was found that the developed automatic system reduces the analysis time by 50% compared with that for manual operation.
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Johannesson, Hans L. "Parametric Computer Aided Hydraulic Cylinder Design: Cylinder Product Modeling." In ASME 1990 Design Technical Conferences. American Society of Mechanical Engineers, 1990. http://dx.doi.org/10.1115/detc1990-0036.

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Abstract In a hydraulic cylinder each cylinder component contributes to the total function, and the components interact and are dependent on each other. The geometry of some components can be completely determined by other surrounding interacting components. In this work it is shown how computer aid can be applied in hydraulic cylinder design when considering component interaction. A special hydraulic cylinder product model is developed. It is stored in an external CAD system independent data base. The parameters stored in the data base are used when retrieving component data from component family data bases, standard component data bases, and when running parametric component and system design programs. The software system used in this work consists of an ordinary 2D wire frame modeling turn-key CAD system, FORTRAN application programs, a data base management system, CAD system independent data bases and CAD system dependent interface programs.
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Johannesson, H. L. "Parametric Computer Aided Hydraulic Cylinder Design: Piston Component Modeling." In ASME 1989 Design Technical Conferences. American Society of Mechanical Engineers, 1989. http://dx.doi.org/10.1115/detc1989-0046.

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Abstract In this work a procedure for parametric computer aided design of hydraulic cylinder pistons has been developed. Such a piston is a kind of component that has a geometry that is dependent and determined of surrounding and interacting parts. The piston seal has a very strong influence on the piston geometry, and the kind of piston design rules that can be found in piston seal catalogues have been used in the developed computer programs. The design procedure is divided in two parts. In the piston family design part, a piston family product model, which is common for a group of pistons with different dimensions but uses the same seal cross section, is created and stored in a piston family product model data base. In the member design part the piston family data is retrieved, dimension determining parameters are given, and one particular piston of a certain size is created and presented. The software system needed in order to be able to apply the suggested procedure consists of - a CAD-system, containing a graphic application program language - a specific CAD-system dependent interface program written in the graphic application program language - two CAD-system independent interface programs written in a common high level language lite FORTRAN - CAD-system independent product model data bases All these programs except the CAD-system have been developed in this work, and the use of the programs is demonstrated with an example.
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Reports on the topic "Computer-aided modeling (CAD)"

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Spangler, Stephen. A/E/C Computer-Aided Design (CAD) Standard : Release 6.2. Engineer Research and Development Center (U.S.), 2024. http://dx.doi.org/10.21079/11681/48775.

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The A/E/C Computer-Aided Design (CAD) Standard has been developed by the CAD/Building Information Modeling (BIM) Technology Center for Facilities, Infrastructure, and Environment to eliminate redundant CAD standardization efforts within DoD and the Federal Government. This manual is part of an initiative to develop a nonproprietary CAD standard that incorporates existing industry, national, and international standards and to develop data standards that address the entire life cycle of facilities within DoD. The material addressed in the A/E/C CAD Standard includes level/layer assignments, digital file naming, and standard symbology. The CAD/BIM Center’s primary goal is to develop a CAD standard that is generic enough to operate under various CAD software packages (such as Bentley’s MicroStation and Autodesk’s AutoCAD) while incorporating existing industry standards when possible. While this Standard encompasses many CAD concepts and practices, it is not intended to limit the capabilities of other advanced modeling software. Ultimately, a BIM / Civil Information Modeling standard will be developed to standardize the additional capabilities of other software.
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Spangler, Stephen, Roger Fujan, Gerald Piotrowski, and Brian Baker. A/E/C Graphics Standard : Release 2.2. Engineer Research and Development Center (U.S.), 2023. http://dx.doi.org/10.21079/11681/47452.

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The A/E/C Graphics Standard Release 2.2 has been developed by the Computer-Aided Design/Building Information Modeling Technology Center to document how proper hand-drafting practices can be achieved in advanced modeling. It is through the collection and documentation of these practices that consistent models and drawings shall be achieved throughout the US Army Corps of Engineers (USACE), as well as other federal agencies. In the collection of these practices, various historical USACE District drafting manuals were consulted and compared against practices contained in industry and national standards, with consideration toward whether software can achieve those practices. The documentation of these practices will help to achieve both clear and aesthetically pleasing construction documents.
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Kirk. L51714 Development of Fitness-for-Purpose Assessment Procedures for Branch Welds. Pipeline Research Council International, Inc. (PRCI), 1994. http://dx.doi.org/10.55274/r0010334.

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One major difficulty in developing fitness-for-purpose based flaw acceptance criteria for pipeline branch connections is the calculation of the stress distributions in the vicinity of the welds. Even with the latest computer aided modeling technologies, direct finite element modeling of branch connections using 3-D solid elements can be time consuming and cost prohibitive. Therefore, it is necessary to investigate the possibility of using more computationally-efficient finite element approaches to determine the stress distributions local to branch connections. This report describes work to develop flaw acceptance criteria based on fitness-for-purpose principles for branch connections in pipelines. The effort concentrated on investigating finite element modeling methodologies to predict accurately the stress distributions local to branch connections. These stress distributions can be used to develop fitness-for-purpose based flaw acceptance criteria that are consistent with those already developed for girth welds.
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Lutz, Carsten. Reasoning about Entity Relationship Diagrams with Complex Attribute Dependencies. Aachen University of Technology, 2002. http://dx.doi.org/10.25368/2022.119.

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Entity Relationship (ER) diagrams are among the most popular formalisms for the support of database design [7, 12, 17, 6]. Their classical use in the (usually computer aided) database design process can roughly be described as follows: after evaluating the requirements of the application, the database designer constructs an ER schema, which represents the conceptual model of the new database. CASE tools can be used to automatically transform the ER schema into a relational database schema, which is then manually fine-tuned. During the last years, the initially rather simple ER formalisms has been extended by various means of expressivity to account for new, more complex application areas such as schema integration for data warehouses [12, 3, 13]. Designing a conceptual model with such enriched ER diagrams is a nontrivial task: there exist complex interactions between the various means of expressivity, which quite often result in unnoticed inconsistencies in the ER schemas and in implicit ramifications of the modeling that have not been intended by the designer. To address this problem, Description Logics (DLs) have been proposed and succesfully used as a tool for reasoning about ER diagrams and thereby detecting the aforementioned anomalies [5, 6, 8].
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