Results 51 to 60 of about 5,264 (176)

A non-uniform rational B-splines (NURBS) based optimization method for fiber path design

Computer Methods in Applied Mechanics and Engineering
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Xuyu Zhang, Yi Min Xie, Cong Wang, He Li, Shiwei Zhou   +4 more
openaire   +2 more sources

Multi‐Physically Programmable Tubular Origami Metamaterials: Exploitable Nexus of Geometry, Folding Mechanics and Stimuli‐Responsive Physics

Advanced Science, Volume 12, Issue 36, September 25, 2025.
This article presents an insightful review on the exploitable nexus of geometry, folding mechanics and stimuli‐responsive physics for achieving active programmability in tubular origami metamaterials and metastructures, highlighting the broad‐spectrum potential in innovative applications across the length scales, along with critically analysing the ...
A. Sharma, S. Naskar, T. Mukhopadhyay
wiley   +1 more source

Simulating and correcting the pileup effect in deep‐silicon photon‐counting CT

Medical Physics, Volume 52, Issue 8, August 2025.
Abstract Background Photon‐counting computed tomography (CT) bears promise to substantially improve spectral and spatial resolution. One reason for the relatively slow evolution of photon‐counting detectors in CT—the technology has been used in nuclear medicine and planar radiology for decades—is pulse pileup, that is, the random staggering of pulses ...
Erik Fredenberg, Daniel Collin, Louis Carbonne, Mingye Wu, Bruno De Man, Fredrik Grönberg   +5 more
wiley   +1 more source

Parametric modeling for automated intelligent design of concrete beam bridges: A global and local optimization approach

Structural Concrete, Volume 26, Issue 4, Page 4083-4102, August 2025.
Abstract The structural design of prestressed concrete girders in beam bridges is performed by coupling 3D parametric modeling, optimization, and statistical techniques, structural analysis, and design. The objective is to explore the potential and advantages of advanced design methodologies based on intelligent design.
Vinicius Nascimento de Moraes, Thomaz Eduardo Teixeira Buttignol   +1 more
wiley   +1 more source

Exact 3D boundary representation in finite element analysis based on Cartesian grids independent of the geometry [PDF]

, 2015
This paper proposes a novel Immersed Boundary Method where the embedded domain is exactly described by using its Computer-Aided Design (CAD) boundary representation with Non-Uniform Rational B-Splines (NURBS) or T-splines.
Boor, Bordas, Borden, Cirak, Cottrell, Dolbow, Escobar, Gil, Goldman, Gordon, Hassan, Hughes, Inoue, Johnson, Jörg, Kim, Legrain, Legrain, Liu, Liu, Liu, Liu, Lorensen, Martin, Melenk, Mittal, Nadal, Parvizian, Peskin, Piegl, Rogers, Ródenas, Rüberg, Sederberg, Sederberg, Sevilla, Sevilla, Sevilla, Sevilla, Sevilla, Strouboulis, Szabó, Tur, Tur, Wandzura, Wang, Wang, Zhang, Zhang, Zhang, Zienkiewicz   +50 more
core   +1 more source

Local distortion as a pitfall of iterative MLEM reconstruction in myocardial perfusion imaging – A phantom study

Journal of Applied Clinical Medical Physics, Volume 26, Issue 7, July 2025.
Abstract Purpose To provide insight into appearance of local distortion as a pitfall and to assess performance of MLEM reconstruction in presence of a high‐contrast object or hot spot and to quantify extent of involvement, specifically in myocardial perfusion imaging. Methods A checkerboard image is reconstructed with MLEM with and without the presence
Mohsen Qutbi
wiley   +1 more source

Optimization-Driven Reconstruction of 3D Space Curves from Two Views Using NURBS

Mathematics
In the realm of 3D curve reconstruction, Non-Uniform Rational B-Splines (NURBSs) offer a versatile mathematical tool due to their ability to precisely represent complex geometries.
Musrrat Ali, Deepika Saini, Sanoj Kumar, Abdul Rahaman Wahab Sait   +3 more
doaj   +1 more source

Extended isogeometric boundary element method (XIBEM) for two-dimensional Helmholtz problems. [PDF]

Isogeometric analysis is a topic of considerable interest in the field of numerical analysis. The boundary element method (BEM) requires only the bounding surface of geometries to be described; this makes non-uniform rational B-splines (NURBS), which ...
Peake, M.J., Trevelyan, J., Coates, G.   +2 more
core   +1 more source

Shape Sensitivity Analysis of History‐Dependent Materials for Dynamic Structures

Proceedings in Applied Mathematics and Mechanics, Volume 25, Issue 1, March 2025.
ABSTRACT This work presents a sensitivity analysis of inelastic material behavior within dynamic structures. The primary focus is on using the direct differentiation method to derive sensitivity matrices for displacement, velocity, acceleration, and history variables. These methods are validated through a detailed academic example.
Seyed Ali Ghasemi, Franz‐Joseph Barthold   +1 more
wiley   +1 more source

The Future of NURBS in CAD: Trends and Innovations [PDF]

MATEC Web of Conferences
Non-Uniform Rational B-Splines (NURBS) remain central to CAD. Their key strength lies in precision, especially for modeling intricate curves and surfaces. Engineers continue to rely on them. Yet technology advances.
Outaybi Hajar, El Khalfi Ahmed, El Makaoui Jawad   +2 more
doaj   +1 more source