Results 51 to 60 of about 14,416 (204)

Imaging with NURBS Freeform Surfaces

open access: yesImaging and Applied Optics 2015, 2015
New developments in the application of NURBS freeform surfaces in imaging systems are described, including their implementation and initial results from next generation designs using the complex shapes that can be modeled. Article not available.
M. Chrisp, B. Primeau
openaire   +2 more sources

Methods for 3D evaluation and quantification of gingival recessions and gingival margin changes: Advancements from conventional techniques

open access: yesPeriodontology 2000, EarlyView.
Abstract In an era of increasing life expectancy and growing patient demands towards lifelong natural tooth retention, accurate assessment of gingival recessions is crucial for diagnosing periodontal diseases, planning preventive or restorative interventions, and evaluating their outcomes.
Nikolaos Gkantidis   +4 more
wiley   +1 more source

A Novel Mixed‐Hybrid, Higher‐Order Accurate Formulation for Kirchhoff–Love Shells

open access: yesProceedings in Applied Mathematics and Mechanics, Volume 26, Issue 2, June 2026.
ABSTRACT This paper presents a novel mixed‐hybrid finite element formulation for Kirchhoff–Love shells, designed to enable the use of standard C0$C^0$‐continuous higher‐order Lagrange elements. This is possible by introducing the components of the moment tensor as a primary unknown alongside the displacement vector, circumventing the need for C1$C^1 ...
Jonas Neumeyer, Thomas‐Peter Fries
wiley   +1 more source

From geometric design to numerical analysis: A direct approach using the Finite Cell Method on Constructive Solid Geometry

open access: yes, 2017
During the last ten years, increasing efforts were made to improve and simplify the process from Computer Aided Design (CAD) modeling to a numerical simulation. It has been shown that the transition from one model to another, i.e.
Bog, Tino   +3 more
core   +1 more source

Elliptic grid generation using NURBS surfaces [PDF]

open access: yesComputer Aided Geometric Design, 1996
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Khamayseh, A., Hamann, Bernd
openaire   +3 more sources

An Efficient Geometrically‐Exact Nonlinear Shell Formulation Based on Rodrigues Parameters

open access: yesProceedings in Applied Mathematics and Mechanics, Volume 26, Issue 2, June 2026.
ABSTRACT Thin‐walled structures are part of many engineering applications, as wind turbine blades, pressure vessels, and sheet metal products. A thin‐walled structure is characterized by one significantly smaller dimension compared to the others.
Cinthia A. G. Sousa   +3 more
wiley   +1 more source

A Novel Explainable AI–Driven Framework for Parametric Knot Vector Estimation in NURBS Surfaces

open access: yesApplied Sciences
Non-uniform rational B-spline (NURBS) surfaces are effective for accurately modeling curved geometries, and research in this area has recently increased.
Furkan Bilucan, Bahadir Ergun
doaj   +1 more source

Algebraic Point Projection for Immersed Boundary Analysis on Low Degree NURBS Curves and Surfaces

open access: yesAlgorithms, 2020
Point projection is an important geometric need when boundaries described by parametric curves and surfaces are immersed in domains. In problems where an immersed parametric boundary evolves with time as in solidification or fracture analysis, the ...
Huanyu Liao   +3 more
doaj   +1 more source

IGA-based Multi-Index Stochastic Collocation for random PDEs on arbitrary domains

open access: yes, 2019
This paper proposes an extension of the Multi-Index Stochastic Collocation (MISC) method for forward uncertainty quantification (UQ) problems in computational domains of shape other than a square or cube, by exploiting isogeometric analysis (IGA ...
Beck, Joakim   +2 more
core   +1 more source

Unstructured grids on NURBS surfaces [PDF]

open access: yes11th Applied Aerodynamics Conference, 1993
A simple and efficient computational method is presented for unstructured surface grid generation. This method is built upon an advancing front technique combined with grid projection. The projection technique is based on a Newton-Raphson method. This combined approach has been successfully implemented for structured and unstructured grids.
openaire   +1 more source

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