Results 31 to 40 of about 766 (235)

On pointwise multipliers in some function spaces [PDF]

open access: yes, 2016
By a pointwise multiplier from a function space X into another function space Y, we mean a function which defines a bounded linear mapping of X into Y by pointwise multiplication.
Myrzagaliyeva, Aigul
core  

Stabilized Lagrange multiplier methods for elastic contact with friction,

open access: yes, 2006
In most finite element (FE) codes contact is checked only at the nodes, corresponding to the use of pointwise constraints. However, this approach might not be stable in case the bodies coming into contact have non-matching grids at the contact interface.
Hansbo, Peter F G   +5 more
core   +1 more source

Retinal Vessel Segmentation: A Comprehensive Review From Classical Methods to Deep Learning Advances (1982–2025)

open access: yesAdvanced Intelligent Systems, EarlyView.
Four decades of retinal vessel segmentation research (1982–2025) are synthesized, spanning classical image processing, machine learning, and deep learning paradigms. A meta‐analysis of 428 studies establishes a unified taxonomy and highlights performance trends, generalization capabilities, and clinical relevance.
Avinash Bansal   +6 more
wiley   +1 more source

Recent advances in the analysis of pointwise state-constrained elliptic optimal control problems [PDF]

open access: yes, 2009
Optimal control problems for semilinear elliptic equations with control constraints and pointwise state constraints are studied. Several theoretical results are derived, which are necessary to carry out a numerical analysis for this class of control ...
Eduardo Casas   +4 more
core   +1 more source

Pointwise multipliers for Besov spaces of dominating mixed smoothness - II [PDF]

open access: yesScience China Mathematics, 2017
29 pages.
Nguyen, Van Kien, Sickel, Winfried
openaire   +3 more sources

Disentangling Aleatoric and Epistemic Uncertainty in Physics‐Informed Neural Networks: Application to Insulation Material Degradation Prognostics

open access: yesAdvanced Intelligent Systems, EarlyView.
Physics‐Informed Neural Networks (PINNs) provide a framework for integrating physical laws with data. However, their application to Prognostics and Health Management (PHM) remains constrained by the limited uncertainty quantification (UQ) capabilities.
Ibai Ramirez   +4 more
wiley   +1 more source

On multipliers in weighted Sobolev spaces. Part II

open access: yesҚарағанды университетінің хабаршысы. Математика сериясы, 2016
Let X, Y be Banach spaces whose elements are functions y : Ω → R. We say that a function z : Ω → R is apointwise multiplier on the pair (X, Y ), if T x = zx ∈ Y and the operator T : X → Y is bounded. M (X → Y )denotes the multiplier space on the pair (X,
A. Myrzagaliyeva
doaj  

Multiplier Hopf Algebras of Discrete Type

open access: yes, 1999
In this paper, we study regular multiplier Hopf algebras with cointegrals. They are a certain class of multiplier Hopf algebras, still sharing many nice properties with the (much smaller class of) finite-dimensional Hopf algebras.
Van Daele, Alfons, Zhang, Yinhuo
core   +1 more source

Cut finite element method for divergence-free approximation of incompressible flow : A Lagrange multiplier approach [PDF]

open access: yes
In this note, we design a cut finite element method for a low order divergence-free element applied to a boundary value problem subject to Stokes' equations.
Burman, E.,, Hansbo, Peter,, Larson, M.,
core   +2 more sources

Seeds of change: The impact of Ethiopia's direct seed marketing approach on smallholders' seed purchases and productivity

open access: yesAmerican Journal of Agricultural Economics, EarlyView.
Abstract While multiple factors explain low adoption rates of improved varieties by small‐scale farmers in sub‐Saharan Africa, a key supply‐side constraint is the limited availability of seed embodying new traits in the volume, quality, price, and timeliness required by farmers. This constraint is partly attributable to classical failures in the market
Dawit Mekonnen   +5 more
wiley   +1 more source

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