Results 101 to 110 of about 6,568 (311)

Singular integrals with bilinear phases

open access: yes, 2006
We prove the boundedness from L-p(T-2) to itself, 1 < p < infinity, of highly oscillatory singular integrals Sf(x, y) presenting singularities of the kind of the double Hilbert transform on a non-rectangular domain of integration, roughly speaking ...
Prestini, E, PRESTINI, ELENA
core   +1 more source

Thermodynamic Pathways of Nonequilibrium Solidification in Wire‐Arc Additive Manufacturing Fe‐Based Multicomponent Alloy Structures

open access: yesAdvanced Engineering Materials, EarlyView.
Geometry‐driven thermal behavior in wire‐arc additive manufacturing (WAAM) influences microstructural evolution during nonequilibrium solidification of a chemically complex Fe–Cr–Nb–W–Mo–C nanocomposite system. By comparing different deposits configurations, distinct entropy–cooling rate correlations, segregation, and carbide evolution are revealed ...
Blanca Palacios   +5 more
wiley   +1 more source

Análogos a Teoremas Tauberianos

open access: yesRevista de Matemática: Teoría y Aplicaciones, 2011
We obtain some results similar to W. Rudin’s Tauberian Theorem, on singular integrals defined on bounded intervals.
María de los Angeles Mora M
doaj   +1 more source

Multi-parameter Singular Integrals I: Examples

open access: yes, 2017
This chapter discusses a few special cases where a theory of multi-parameter singular integral operators has already been developed. These include the product theory of singular integrals, convolution with flag kernels on graded groups, convolution with ...
Brian Street
core   +1 more source

Productivity‐Driven Optimization of Laser Powder Bed Fusion Parameters for IN718 Superalloy: Process Control, Microstructure, and Mechanical Properties

open access: yesAdvanced Engineering Materials, EarlyView.
This study demonstrates how optimizing laser power, scanning speed, and hatching distance in laser powder bed fusion can boost the productivity of Inconel 718 manufacturing by up to 29% while maintaining mechanical integrity. The work delivers a validated process window and cost–time analysis, offering industry‐ready guidelines for efficient additive ...
Amir Behjat   +7 more
wiley   +1 more source

COMMUTATORS OF SINGULAR INTEGRAL OPERATORS

open access: yesProceedings of the National Academy of Sciences, 1965
where x, y are points in n-dimensional Euclidean space R" and k(x) is a homogeneous function of degree -n with mean value zero on xl = 1, and let B(f) = b(x)f(x). It is well known (see ref. 1) that if k anid b are sufficiently smooth and b is bounded, then (AB BA)(0/0ax) and (0/ax) (AB BA) are bounded operators in Lp ...
openaire   +3 more sources

Rafting of Ni‐Based Superalloys Under Multiaxial Load as Understood by Phase‐Field Simulations and Critical Experiments

open access: yesAdvanced Engineering Materials, EarlyView.
Phase‐field simulations coupled with dislocation‐density‐based crystal plasticity modeling reproduce γ′ rafting behavior in single‐crystal Ni‐based superalloys under varied loading conditions. The model captures both macroscopic creep and microscopic morphology evolution, with results matching high‐temperature creep experiments.
Micheal Younan   +5 more
wiley   +1 more source

On Sharpness of $L$ log $L$ Criterion for Weak Type $(1,1)$ boundedness of rough operators

open access: yesComptes Rendus. Mathématique
In this note, we show that the $\Omega \in L\log L$ hypothesis is the strongest size condition on a function $\Omega $ on the unit sphere with mean value zero, which ensures that the corresponding singular integral $T_\Omega $ defined by \[ T_{\Omega }f ...
Bhojak, Ankit
doaj   +1 more source

Estimates for singular integrals along surfaces of revolution

open access: yes, 2009
We prove certain Lp estimates ...
20162430   +4 more
core   +1 more source

Additive Manufacturing of Continuous Fibre Reinforced Composites: Process, Characterisation, Modelling, and Sustainability

open access: yesAdvanced Engineering Materials, EarlyView.
Additive manufacturing provides precise control over the placement of continuous fibres within polymer matrices, enabling customised mechanical performance in composite components. This article explores processing strategies, mechanical testing, and modelling approaches for additive manufactured continuous fibre‐reinforced composites.
Cherian Thomas, Amir Hosein Sakhaei
wiley   +1 more source

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