Results 71 to 80 of about 814 (179)

Isogeometric Fast Multipole Boundary Element Method Based on Burton-Miller Formulation for 3D Acoustic Problems

Archives of Acoustics, 2019
An isogeometric boundary element method is applied to simulate wave scattering problems governed by the Helmholtz equation. The NURBS (non-uniform rational B-splines) widely used in the CAD (computer aided design) field is applied to represent the ...
Leilei CHEN, Wenchang ZHAO, Cheng LIU, Haibo CHEN, Steffen MARBURG   +4 more
doaj   +1 more source

A Systems Pharmacology Model of Aging Identifies Optimal Combination Therapies With Secondary Benefits on Weight Loss and Metabolic Health

CPT: Pharmacometrics &Systems Pharmacology, Volume 15, Issue 8, August 2026.
ABSTRACT Aging is a systems‐level process linking metabolic dysfunction, inflammation, impaired repair, frailty, and multimorbidity, whereas existing pharmacological strategies usually optimize disease‐specific endpoints such as weight loss or HbA1c rather than aging‐related trajectories. We developed an SBML‐compliant quantitative systems pharmacology
Igor Goryanin, Bob Damms, Irina Goryanin
wiley   +1 more source

Automatic Generation of T-Splines with Extraordinary Points Based on Domain Decomposition of Quadrilateral Patches

Mathematics
Isogeometric analysis (IGA) is a numerical methodology for solving differential equations by employing basis functions that preserve the exact geometry of the domain. This approach is based on a class of mathematical functions known as NURBS (Non-Uniform
João Carlos L. Peixoto, Rafael L. Rangel, Luiz Fernando Martha   +2 more
doaj   +1 more source

Field‐level crop choice responses to weather‐induced yield shocks in the US Corn Belt

American Journal of Agricultural Economics, Volume 108, Issue 4, Page 1048-1075, August 2026.
Abstract As climate change increases the frequency and severity of extreme heat events, farmers are expected to face greater variability in crop yields. Using 10 million field‐level observations, this study examines how farmers in the US Corn Belt adjust corn–soybean rotation decisions in response to yield shocks largely driven by weather fluctuations.
Seunghyun Lee
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

Numerical Anisotropy and Band‐Gap Formation in Finite Element Wave Propagation: Analysis and Mitigation Using Spline‐Based Elements

International Journal for Numerical Methods in Engineering, Volume 127, Issue 14, 30 July 2026.
ABSTRACT Numerical anisotropy and dispersion are inherent consequences of spatial discretization in finite element modeling of wave propagation. In two‐dimensional problems, these effects manifest not only as direction‐dependent phase and group velocities but also as angularly dependent numerical band gaps that may entirely suppress wave propagation ...
Wiktor Waszkowiak, Arkadiusz Żak, Łukasz Doliński, Paweł Kowalski   +3 more
wiley   +1 more source

On the application of the partition of unity method for nonlocal response of low-dimensional structures

Journal of the Mechanical Behavior of Materials, 2014
The main objectives of the paper are to (1) present an overview of nonlocal integral elasticity and Aifantis gradient elasticity theory and (2) discuss the application of partition of unity methods to study the response of low-dimensional structures.
Natarajan Sundararajan
doaj   +1 more source

Numerical optimisation of a small-scale wind turbine through the use of surrogate modelling

Journal of Energy in Southern Africa, 2017
Wind conditions in South Africa are suitable for small-scale wind turbines, with wind speeds below 7 m.s−1. This investigation is about a methodology to optimise a full wind turbine using a surrogate model.
Gareth Erfort, Theodor Willem von Backström, Gerhard Venter   +2 more
doaj   +1 more source

NELE: Non-Uniform Rational B-Spline Elementwise Learnable

This work introduces an activation function (AF) based on Non-Uniform Rational B-Splines (NURBS), designed to provide smooth, flexible, and learnable non-linearities for neural networks. Unlike traditional fixed AF (ReLU, tanh, sigmoid), the NURBS-based activation can adapt its shape during training, offering higher expressivity while maintaining ...
openaire   +2 more sources

Sensitivity Analysis of Underwater Structural-Acoustic Problems Based on Coupled Finite Element Method/Fast Multipole Boundary Element Method with Non-Uniform Rational B-Splines

Journal of Marine Science and Engineering
For the direct differentiation technique-based modeling of acoustic fluid–structure interaction and structural-acoustic sensitivity analysis, a coupling algorithm based on the finite element method (FEM) and the fast multipole boundary element method ...
Yonghui Cao, Zhongbin Zhou, Yanming Xu, Yilin Qu   +3 more
doaj   +1 more source