Results 51 to 60 of about 468 (145)

A GEOMETRIC PROCESSING WORKFLOW FOR TRANSFORMING REALITY-BASED 3D MODELS IN VOLUMETRIC MESHES SUITABLE FOR FEA [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2017
Conservation of Cultural Heritage is a key issue and structural changes and damages can influence the mechanical behaviour of artefacts and buildings. The use of Finite Elements Methods (FEM) for mechanical analysis is largely used in modelling stress ...
S. Gonizzi Barsanti, G. Guidi
doaj   +1 more source

The crucial role of meshing in computational fluid dynamics simulations for organic geometries in paleobiology: Describing fluid dynamics performance through best practices

Methods in Ecology and Evolution, Volume 16, Issue 10, Page 2170-2194, October 2025.
Abstract Computational fluid dynamics (CFD) has become an essential tool for studying fluid interactions in biological systems. While widely used in engineering, its application in the natural sciences, particularly in paleobiology, remains limited due to the challenges of meshing complex organic geometries.
Matheo López‐Pachón, Jordi Marcé‐Nogué   +1 more
wiley   +1 more source

Comparative Study on the Interest in Non-Uniform Rational B-Splines Representation versus Polynomial Surface Description in a Freeform Three-Mirror Anastigmat

Photonics
Novel freeform optical design methods can be classified in two categories, depending on whether they focus on the generation of a starting point or the development of new optimization tools.
Clément Freslier, Guillaume Druart, Alice Fontbonne, Thierry Lépine, Christophe Buisset, Tibor Agocs, Arnaud Heliere, Fanny Keller, Jean-Baptiste Volatier, Stéphane Beaussier, Paul Jougla   +10 more
doaj   +1 more source

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

Parameterized Modeling of Blended Wing Body Aircraft Based on Multi-Scale CST Method [PDF]

Hangkong bingqi
In the parameterized modeling of blended wing body aircraft, the commonly used CST method has weak local deformation control capability, while the Non-Uniform Rational B-Splines(NURBS)method has the problem of too many global parameters.
Wang Kangjun, Wang Wenkai, Zheng Xiaolin
doaj   +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

Testing the Effectiveness of Voxels for Structural Analysis

Algorithms
To assess the condition of cultural heritage assets for conservation, reality-based 3D models can be analyzed using FEA (finite element analysis) software, yielding valuable insights into their structural integrity.
Sara Gonizzi Barsanti, Ernesto Nappi
doaj   +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

Feed Rate-Adaptive Predictive PH Interpolation for Real-Time NURBS Toolpath Execution in High-Speed CNC Machining

Measurement Science Review
This study presents a novel feed rate-adaptive predictive interpolation algorithm that combines Pythagorean-hodograph (PH) curves with non-uniform rational b-splines (NURBS) to improve real-time toolpath generation in high-speed CNC machining.
Tian Guosheng
doaj   +1 more source