Results 151 to 160 of about 210,074 (289)

Laguerre polynomials and the inverse Laplace transform using discrete data

open access: bronze, 2007
Tran Ngoc Lien   +2 more
openalex   +1 more source

Multi‐stage stochastic frontier analysis for simple networks

open access: yesInternational Transactions in Operational Research, Volume 32, Issue 5, Page 2497-2522, September 2025.
Abstract We develop a method for modelling multi‐stage production using stochastic frontier analysis. This approach is suitable for the analysis of costs or output where intermediate outputs become inputs into a subsequent stage of the production process, either within an organisation or in the form of a supply chain.
Geraint Johnes   +2 more
wiley   +1 more source

A High‐Order Hybrid‐Spectral Incompressible Navier–Stokes Model for Non‐Linear Water Waves

open access: yesInternational Journal for Numerical Methods in Fluids, Volume 97, Issue 6, Page 1009-1021, June 2025.
We present a high‐order accurate CFD model for simulating nonlinear water waves using the incompressible Navier–Stokes equations. The model employs a combined Chebyshev–Fourier basis for efficient spatial discretization, and a low‐storage fourth‐order Runge–Kutta method for temporal integration. A Poisson pressure problem is solved using a geometric p$$
Anders Melander   +3 more
wiley   +1 more source

Uncertainty Quantification of Geophysical and Hydrologic Parameters Estimated From Borehole Nuclear Magnetic Resonance Data

open access: yesJournal of Geophysical Research: Machine Learning and Computation, Volume 2, Issue 2, June 2025.
Abstract Borehole nuclear magnetic resonance (bNMR) data are typically used to infer in situ hydrologic properties. Partial water content as a function of pore size is estimated by fitting the measured NMR response to a multi‐exponential T2 distribution, and the sum of estimated T2 amplitudes equals the total volumetric water content.
Burke J. Minsley   +2 more
wiley   +1 more source

Forward uncertainty quantification in random differential equation systems with delta‐impulsive terms: Theoretical study and applications

open access: yesMathematical Methods in the Applied Sciences, Volume 48, Issue 7, Page 7609-7629, 15 May 2025.
This contribution aims at studying a general class of random differential equations with Dirac‐delta impulse terms at a finite number of time instants. Our approach directly addresses calculating the so‐called first probability density function, from which all the relevant statistical information about the solution, a stochastic process, can be ...
Vicente J. Bevia   +2 more
wiley   +1 more source

Density, Surface Tension, and Viscosity of Liquid Low‐Sulfur Manganese–Boron Steel via Maximum Bubble Pressure and Oscillating Crucible Methods

open access: yessteel research international, Volume 96, Issue 5, May 2025.
Thermophysical properties of liquid low‐sulfur manganese–boron steel with varying boron and sulfur content at different temperatures are investigated. Using maximum bubble pressure and oscillating crucible viscometer methods, density, surface tension, and viscosity are measured.
Matheus Roberto Bellé   +7 more
wiley   +1 more source

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