Results 11 to 20 of about 210,860 (290)

Pullback attractors for a semilinear heat equation in a non-cylindrical domain [PDF]

open access: yesJournal of Differential Equations, 2008
The existence and uniqueness of a variational solution satisfying energy equality is proved for a semilinear heat equation in a non-cylindrical domain with homogeneous Dirichlet boundary condition, under the assumption that the spatial domains are bounded and increase with time.
Kloeden, Peter E.   +2 more
openaire   +5 more sources

An existence result for evolution equations in non-cylindrical domains [PDF]

open access: yesNonlinear Differential Equations and Applications NoDEA, 2013
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
PARONETTO, FABIO
openaire   +4 more sources

Exact controllability for a wave equation with mixed boundary conditions in a non-cylindrical domain [PDF]

open access: yesElectronic Journal of Differential Equations, 2014
In this article we study the exact controllability of a one-dimensional wave equation with mixed boundary conditions in a non-cylindrical domain. The fixed endpoint has a Dirichlet-type boundary condition, while the moving end has a Neumann-type ...
Lizhi Cui, Hang Gao
doaj   +1 more source

The acoustics of curved and lined cylindrical ducts with mean flow [PDF]

open access: yes, 2010
This thesis considers linear perturbations to the steady flow of a compressible inviscid perfect gas along a cylindrical or annular duct. Particular consideration is given to the model of the duct boundary, and to the effect of curvature of the duct ...

core   +2 more sources

A 1D Reduced-Order Model (ROM) for a Novel Latent Thermal Energy Storage System

open access: yesEnergies, 2022
Phase change material (PCM)-based thermal energy storage (TES) systems are widely used for repeated intermittent heating and cooling applications. However, such systems typically face some challenges due to the low thermal conductivity and expensive ...
Gargi Kailkhura   +3 more
doaj   +1 more source

Cylindrical resonator filled with four alternating sectors of DPS and DNG materials [PDF]

open access: yes, 2013
A circular cylindrical metallic resonator with four alternating sectors of DPS and DNG materials is analyzed, in the frequency domain. The two materials are linear, lossless, homogeneous, and anti-isorefractive to each other.
Graglia, Roberto   +7 more
core   +1 more source

Variational Equations of Schroedinger-Type in Non-cylindrical Domains

open access: yesJournal of Differential Equations, 2001
The boundary value problem \[ u(x, t)_t- i\sum (a_{ij}(x, t) u(x,t)_{x_i})_{x_j}- c(x,t) u(x,t)= f(x,t)\;\text{in }Q, \] \[ u(x,t)= 0\;\text{on }\Sigma,\quad u(x,0)= u_0(x)\;\text{on }Q_0, \] is investigated, where \(Q\subset \mathbb{R}^n\times (0,T)\) is an open subset (with the lateral boundary denoted by \(\Sigma\)) whose sections \(Q_t\) (\(t ...
BERNARDI, MARCO LUIGI   +2 more
openaire   +1 more source

Practical method for the determination of time step in non-orthogonal FDTD [PDF]

open access: yes, 2001
The Non-Orthogonal FDTD algorithm is well-suited to the modelling of curved structures, however users of the technique frequently have difficulty determining an appropriate time step for the algorithm.
Nilavalan, R, Railton, CJ, Craddock, IJ
core   +1 more source

Microwave Tomography With LSTM-Based Processing of the Scattered Field

open access: yesIEEE Open Journal of Antennas and Propagation, 2021
The quantitative inspection of unknown targets or bodies by means of microwave tomography requires a proper modeling of the field scattered by the structures under test, which in turn depends on several factors related to the adopted antennas and ...
Alessandro Fedeli
doaj   +1 more source

Stability analysis of second- and fourth-order finite-difference modelling of wave propagation in orthotropic media [PDF]

open access: yes, 2010
The stability of the finite-difference approximation of elastic wave propagation in orthotropic homogeneous media in the three-dimensional case is discussed.
Veres, Istvan
core   +1 more source

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