Results 21 to 30 of about 13,400 (188)
Barycentric interpolation and exact integration formulas for the finite volume element method [PDF]
, 2012 This contribution concerns with the construction of a simple and effective technology for the problem of exact integration of interpolation polynomials arising while discretizing partial differential equations by the finite volume element method on ...
core +1 more source
Learning of Continuous and Piecewise-Linear Functions With Hessian Total-Variation Regularization
IEEE Open Journal of Signal Processing, 2022 We develop a novel 2D functional learning framework that employs a sparsity-promoting regularization based on second-order derivatives. Motivated by the nature of the regularizer, we restrict the search space to the span of piecewise-linear box splines ...
Joaquim Campos +2 more
doaj +1 more source
Simulation of the process of plane-radial filtration of fluid in a porous medium considering the migration [PDF]
E3S Web of Conferences, 2023 Modeling plane-radial fluid filtration in a porous medium is considered in the article, taking into account the condition of fluid flow to a perfect well with a constant flow rate drilled in the center of the formation; the problem of identifying the ...
Ravshanov N. +3 more
doaj +1 more source
Application of Barycentric Coordinates in Space Vector PWM Computations
IEEE Access, 2019 This paper proposes the use of barycentric coordinates in the development and implementation of space-vector pulse-width modulation (SVPWM) methods, especially for inverters with deformed space-vector diagrams.
Pawel Szczepankowski, Janusz Nieznanski
doaj +1 more source
High-Precision Registration of Lunar Global Mapping Products Based on Spherical Triangular Mesh
Remote Sensing, 2022 Lunar global mapping products provide a solid data foundation for lunar scientific research and exploration. As the widespread geometric inconsistencies among multi-source mapping products seriously affect the synergistic use of the products, high ...
Zheng Bo +7 more
doaj +1 more source
A New Coordinate System for Constructing Spherical Grid Systems
Applied Sciences, 2020 In astronomy, physics, climate modeling, geoscience, planetary science, and many other disciplines, the mass of data often comes from spherical sampling.
Kin Lei, Dongxu Qi, Xiaolin Tian
doaj +1 more source
Beyond the Standard IAU Framework [PDF]
, 2009 We discuss three conceivable scenarios of extension and/or modification of the IAU relativistic resolutions on time scales and spatial coordinates beyond the Standard IAU Framework.
Kopeikin, Sergei M.
core +2 more sources
Random processes with convex coordinates on triangular graphs
International Journal of Mathematics and Mathematical Sciences, 1997 Probabilities for reaching specified destinations and expectation values for lengths for random walks on triangular arrays of points and edges are computed.
J. N. Boyd, P. N. Raychowdhury
doaj +1 more source
IEEE Access, 2015 Localization, finding the coordinates of an object with respect to other objects with known coordinates-hereinafter, referred to as anchors, is a nonlinear problem, as it involves solving circle equations when relating distances to Cartesian coordinates,
Usman A. Khan +2 more
doaj +1 more source
A Simple Affine-Invariant Spline Interpolation over Triangular Meshes
Mathematics, 2022 Given a triangular mesh, we obtain an orthogonality-free analogue of the classical local Zlámal–Ženišek spline procedure with simple explicit affine-invariant formulas in terms of the normalized barycentric coordinates of the mesh triangles.
László L. Stachó
doaj +1 more source