Results 91 to 100 of about 1,679 (224)

neonSoilFlux: An R package for continuous sensor‐based estimation of soil CO2 fluxes

Methods in Ecology and Evolution, EarlyView.
Abstract Accurate quantification of soil carbon fluxes is essential to reduce uncertainty in estimates of the terrestrial carbon sink. However, these fluxes vary over time and across ecosystem types and so, it can be difficult to estimate them accurately across large scales.
John Zobitz, Edward Ayres, Zoey Werbin, Ridwan Abdi, Natalie Ashburner‐Wright, Lillian Brown, Ryan Frink‐Sobierajski, Lajntxiag Lee, Dijonë Mehmeti, Christina Tran, Ly Xiong, Naupaka Zimmerman   +11 more
wiley   +1 more source

A Machine Learning Approach to Optimize Quadrature Rule for Isogeometric Analysis

Isogeometric analysis (IGA) is a numerical method to solve partial differential equations, which takes the computer-aided design (CAD) model for the analysis of various field variables.
Nath, Dipjyoti,, Gautam, Sachin Singh,, Agrawal, Vishal,   +2 more
core   +1 more source

Implications of the Choice of Quadrature Nodes for Picard Integral Deferred Corrections Methods for Ordinary Differential Equations

, 2005
This paper concerns a class of deferred correction methods recently developed for initial value ordinary differential equations; such methods are based on a Picard integral form of the correction equation. These methods divide a given timestep [tn ,tn+1]
Layton, Anita, Minion, Michael
core   +1 more source

From tetrachoric to kappa: How to assess reliability on binary scales

British Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract Reliability is crucial in psychometrics, reflecting the extent to which a measurement instrument can discriminate between individuals or items. While classical test theory and intraclass correlation coefficients are well‐established for quantitative scales, estimating reliability for binary outcomes presents unique challenges due to their ...
Sophie Vanbelle
wiley   +1 more source

Asymptotic standard errors for reliability coefficients in item response theory

British Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract In a recent review, Liu et al. (Psychological Methods, 2025b) classified reliability coefficients into two types: classical test theory (CTT) reliability and proportional reduction in mean squared error (PRMSE). This article focuses on quantifying the sampling variability of these coefficients under item response theory (IRT) models.
Youjin Sung, Yang Liu
wiley   +1 more source

Numerical methods for ordinary differential equations with applications to partial differential equations

, 1983
This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.The thesis develops a number of algorithms for the numerical solution of ordinary differential equations with applications to partial differential equations.
Khaliq, Abdul Qayyum Masud
core  

Composite marginal likelihood estimation of higher‐order diagnostic classification models under high dimensionality

British Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract Although full‐information maximum likelihood (FIML) estimation is widely used for diagnostic classification models (DCMs), its computational efficiency deteriorates sharply in high‐dimensional settings. This scalability challenge is increasingly critical as DCMs are applied to large‐scale assessments, psychological testing and longitudinal ...
Minho Lee, Yon Soo Suh
wiley   +1 more source

Inherent resonance of carbon and graphene-based nanocomposite coupled single-span arch beams

Composites Part C: Open Access
In recent decades, there has been a significant rise in the utilization of composite materials for various engineering applications. These advanced materials offer the potential to improve the mechanical properties and vibration characteristics of ...
Moein Alreza Ghandehari, Amir R. Masoodi
doaj   +1 more source

SHARP ERROR BOUNDS OF A QUADRATURE RULE WITH ONE MULTIPLE NODE FOR THE FINITE HILBERT TRANSFORM IN SOME CLASSES OF CONTINUOUS DIFFERENTIABLE FUNCTIONS

Taiwanese Journal of Mathematics, 2005
Using classical techniques, the author derives error bounds for a quadrature formula for Cauchy principal value integrals \(\int_a^b (\tau-t)^{-1} f(\tau) d \tau\) where ...
openaire   +2 more sources

SDFs from Unoriented Point Clouds using Neural Variational Heat Distances

Computer Graphics Forum, EarlyView.
We propose a novel variational approach for computing neural Signed Distance Fields (SDF) from unoriented point clouds. We first compute a small time step of heat flow (middle) and then use its gradient directions to solve for a neural SDF (right). Abstract We propose a novel variational approach for computing neural Signed Distance Fields (SDF) from ...
Samuel Weidemaier, Florine Hartwig, Josua Sassen, Sergio Conti, Mirela Ben‐Chen, Martin Rumpf   +5 more
wiley   +1 more source