Results 111 to 120 of about 575 (217)

Modified Trapezoidal Product Cubature Rules: Definiteness, Monotonicity, and a Posteriori Error Estimates

Mathematics
We study two modifications of the trapezoidal product cubature formulae, approximating double integrals over the square domain [a,b]2=[a,b]×[a,b]. Our modified cubature formulae use mixed type data: except evaluations of the integrand on the points ...
Geno Nikolov, Petar Nikolov
doaj   +1 more source

Convergence of Gaussian Quadrature Formulas

Journal of Approximation Theory, 2000
Classical Gaussian formulas are well known. They construct a polynomial interpolating in the zeros of a polynomial orthogonal with respect to a positive measure \(\alpha\) and the integral of this polynomial is a quadrature formula for \(\int f(x) d\alpha(x)\) with maximal polynomial degree of exactness.
openaire   +2 more sources

Material‐Driven Neuronal Oscillators and Filters via Active Reactance in CC‐NDR and VC‐NDR Electro‐Thermal Memristors

Advanced Physics Research, Volume 5, Issue 7, July 2026.
Active reactance in electro‐thermal memristors emerges intrinsically from rapid thermal switching of device resistance, linking current‐controlled and voltage‐controlled negative differential resistance to neuronal spiking dynamics. Opposing temperature coefficients of resistance give rise to active inductive or capacitive responses, enabling tunable ...
Fatme Jardali, Gwyneth Svatek, R. Stanley Williams, Timothy D. Brown, Patrick J. Shamberger   +4 more
wiley   +1 more source

Solving singularly perturbed fredholm integro-differential equation using exact finite difference method. [PDF]

BMC Res Notes, 2023
Badeye SR, Woldaregay MM, Dinka TG.
europepmc   +1 more source

Stress redistribution following landslides: Insights from 3D stress modelling of mountain topography

Earth Surface Processes and Landforms, Volume 51, Issue 7, July 2026.
We present a novel numerical workflow adapting the Finite Cell Method directly to digital elevation models to simulate near‐surface stress fields. The models demonstrate that topographic unloading via slope failure dramatically reduces localized peak shear stresses but actively redistributes elastic loads onto adjacent slopes, driving progressive ...
Viktor Haunsperger, Jörg Robl, Anne‐Laure Argentin, Stefan Hergarten, Martin Mergili, Andreas Schröder   +5 more
wiley   +1 more source

Benchmarking Hybrid CNN‐Transformer Versus Pure Transformer Architectures for Accelerated Hyperpolarized 129Xe MRI Reconstruction

Journal of Magnetic Resonance Imaging, Volume 64, Issue 1, Page 266-280, July 2026.
ABSTRACT Background Hyperpolarized 129Xe MRI faces technical challenges including low signal‐to‐noise ratio and breath‐hold constraints. Current literature focuses on proprietary deep learning methods or image‐domain enhancements. Purpose To present a comprehensive evaluation of transformer and hybrid CNN‐transformer architectures integrating dual ...
Ramtin Babaeipour, Matthew S. Fox, Grace Parraga, Alexei Ouriadov   +3 more
wiley   +1 more source

Stability of a Fully Discrete Local Discontinuous Galerkin Method for the Generalized Benjamin–Ono Equation

Numerical Methods for Partial Differential Equations, Volume 42, Issue 4, July 2026.
ABSTRACT The main purpose of this paper is to design a fully discrete local discontinuous Galerkin (LDG) scheme for the generalized Benjamin–Ono equation. First, we prove the L2$$ {L}^2 $$‐stability for the proposed semi‐discrete LDG scheme and obtained a suboptimal order of convergence for power nonlinear flux.
Mukul Dwivedi, Tanmay Sarkar
wiley   +1 more source

Variable Source Zones Controlling Flow, Water Age, and Nitrate Export Dynamics in a Tile‐Drained Lowland Watershed

Water Resources Research, Volume 62, Issue 7, July 2026.
Abstract Linking hydrograph dynamics with transport velocities and biogeochemical responses remains a central challenge in watershed hydrology, yet it is critical for understanding nitrogen reactive transport and its implications for water quality. In this study, we combined high‐frequency measurements of stable water isotopes and nitrate concentration
Sabine G. Miller, Zhongjie Yu, Minghui Sha, Minpeng Hu, Carlos E. Guacho, Corey A. Mitchell   +5 more
wiley   +1 more source

Evolution of Sulfur Concentration in the Deep Earth During the Proto‐Earth Growth: First‐Principles Study on the Sulfur Partitioning Between Metal and Silicate at High Pressure and Temperature

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 7, July 2026.
Abstract Sulfur (S) is one of the promising light elements that can explain the density deficit of the core. The degree of siderophile nature of S under high pressure and temperature (P,T) is the key to estimating the S content in the core. However, a significant discrepancy between the metal‐silicate partition coefficient of S extrapolated from ...
K. Itoh, T. Tsuchiya
wiley   +1 more source

Treeline Provides a Unified Strategy for Optimising Phylogenetic Trees Under Alternative Criteria

Molecular Ecology Resources, Volume 26, Issue 5, July 2026.
ABSTRACT The choice of optimality criterion is a key consideration in phylogenetic studies. Recent work challenges the notion that more computationally demanding optimisation objectives result in better phylogenetic trees. This finding underscores the importance of comparing trees across optimisation objectives in addition to different models of ...
Erik S. Wright
wiley   +1 more source