Results 11 to 20 of about 423 (186)

A PIE Representation of Coupled Linear 2D PDEs and Stability Analysis using LPIs

open access: yes, 2022
We introduce a Partial Integral Equation (PIE) representation of Partial Differential Equations (PDEs) in two spatial variables. PIEs are an algebraic state-space representation of infinite-dimensional systems and have been used to model 1D PDEs and time-
Peet, Matthew M., Jagt, Declan S.
core   +1 more source

$L_2$-Gain Analysis of Coupled Linear 2D PDEs using Linear PI Inequalities

open access: yes, 2022
In this paper, we present a new method for estimating the $L_2$-gain of systems governed by 2nd order linear Partial Differential Equations (PDEs) in two spatial variables, using semidefinite programming.
Peet, Matthew M., Jagt, Declan S.
core   +1 more source

Functional Law of Large Numbers and PDEs for Epidemic Models with Infection-Age Dependent Infectivity

open access: yes, 2023
International audienceWe study epidemic models where the infectivity of each individual is a random function of the infection age (the elapsed time of infection).
Pardoux, Étienne, Pang, Guodong
core   +1 more source

Initial and boundary value problems in two and three dimensions

open access: yes, 2010
This thesis: (a) presents the solution of several boundary value problems (BVPs) for the Laplace and the modified Helmholtz equations in the interior of an equilateral triangle; (b) presents the solution of the heat equation in the interior of an ...
Fokas, Athanassios   +1 more
core   +2 more sources

Rational spectral methods for PDEs involving fractional Laplacian in unbounded domains

open access: yes, 2020
Many PDEs involving fractional Laplacian are naturally set in unbounded domains with underlying solutions decaying slowly and subject to certain power law. Their numerical solutions are underexplored.
Zhou, Tao   +3 more
core   +1 more source

Probabilistic approach to non-local equations [PDF]

open access: yes, 2021
The work focuses on probabilistic representation of solutions of non-local equations, where the considered non-local operators are either Caputo-type derivatives or trasformations of the Laplace operator via Bernstein functions.
Ascione, Giacomo
core  

Portopulmonary hypertension practice patterns after liver transplantation

open access: yesLiver Transplantation, EarlyView., 2022
Abstract Portopulmonary hypertension (POPH) is a type of pulmonary arterial hypertension occurring exclusively in those with portal hypertensive liver disease. Liver transplantation (LT) can significantly improve outcomes. Current guidelines counsel against immediate adjustments to targeted therapy after LT and suggest routine echocardiography as ...
Arun Jose   +3 more
wiley   +1 more source

Historical Foundation and Practical Guideline for Ferroelectric Switching Kinetic Studies

open access: yesAdvanced Functional Materials, EarlyView.
The P and U pulses in the conventional PUND measurements are not identical because of the interplay between switching current and the measurement circuit components. This circuit effect can lead to a shift in polarization transients and misinterpreted physics in the switching kinetics.
Yi Liang, Pat Kezer, John T. Heron
wiley   +1 more source

Topology and Material Optimization in Ultra‐Soft Magneto‐Active Structures: Making Advantage of Residual Anisotropies

open access: yesAdvanced Materials, EarlyView.
Residual magnetization induces pronounced mechanical anisotropy in ultra‐soft magnetorheological elastomers, shaping deformation and actuation even without external magnetic fields. This study introduces a computational‐experimental framework integrating magneto‐mechanical coupling into topology optimization for designing soft magnetic actuators with ...
Carlos Perez‐Garcia   +3 more
wiley   +1 more source

Multi-scale physical representations for approximating pde solutions with graph neural operators

open access: yes, 2022
International audienceRepresenting physical signals at different scales is among the most challenging problems in engineering. Several multi-scale modeling tools have been developed to describe physical systems governed by Partial Differential Equations (
Migus, Leon   +3 more
core  

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