Results 31 to 40 of about 639,340 (301)
Wiener criteria for existence of large solutions of nonlinear parabolic equations with absorption in a non-cylindrical domain [PDF]
, 2014 We obtain a necessary condition and a sufficient condition, both expressed in terms of Wiener type tests involving the parabolic W q ′ 2 , 1 -capacity, where q ′ = q q − 1 and q > 1 , for the existence of large solutions to equation ∂ t u − Δ u + u q = 0
Quoc-Hung Nguyen, L. Véron
semanticscholar +1 more source
Approximation of the acoustic radiation impedance of a cylindrical pipe [PDF]
, 2008 Useful approximation formulae for radiation impedance are given for the reflection coefficients of both infinitely flanged and unflanged rigid-walled cylindrical ducts.
A.N. Norris +14 more
core +3 more sources
Variational Equations of Schroedinger-Type in Non-cylindrical Domains
Journal 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
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Microwave Tomography With LSTM-Based Processing of the Scattered Field
IEEE 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
Attractors for the nonlinear elliptic boundary value problems and their parabolic singular limit [PDF]
, 2011 We apply the dynamical approach to the study of the second order semi-linear elliptic boundary value problem in a cylindrical domain with a small parameter at the second derivative with respect to the "time" variable corresponding to the axis of the ...
Vishik, Mark I., Zelik, Sergey V.
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Complex WGM frequencies of gyroelectric cylindrical resonators
IET Microwaves, Antennas & Propagation, 2021 Asymptotic closed‐form expressions for calculating complex transverse electric (TE)/transverse magnetic (TM) whispering gallery mode (WGM) frequencies in homogeneous gyroelectric circular cylindrical resonators of infinite length are derived. In addition,
Konstantinos Katsinos +4 more
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Tribology Online, 2022 The purpose of this work is to investigate the effect of cylindrical, kite and triangular shaped dimples on static, dynamic and stability performance of partial textured hydrodynamic journal bearing working under turbulent regime.
Jagjit Singh Maan, Rajeev Kumar Awasthi
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Strong Approximations of BSDEs in a domain [PDF]
, 2008 We study the strong approximation of a Backward SDE with finite stopping time horizon, namely the first exit time of a forward SDE from a cylindrical domain. We use the Euler scheme approach of Bouchard and Touzi, Zhang 04}.
Bouchard, Bruno, Menozzi, Stephane
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Logarithmic wave equations in non-cylindrical domains
, 2021 This paper is devoted to studying a type of logarithmic wave equation in non-cylindrical domains. Firstly, by the penalty method, we prove the existence of weak solutions to such kind of equations. Secondly, different from the dissipative wave equation, the energy defined in this problem is not always positive.
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3D THz-TDS SAR Imaging by an Inverse Synthetic Cylindrical Aperture
IEEE Access, 2023 Terahertz time-domain spectroscopy (THz-TDS) is a promising tool for high-resolution 3D imaging of objects due to the high center frequency and bandwidth compared to microwave systems.
Dilyan Damyanov +5 more
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