Results 71 to 80 of about 138,114 (286)
Comparison of modelling approaches for liquid fluidized beds
The Canadian Journal of Chemical Engineering, EarlyView.Abstract This study presents a comparison of three promising numerical models for the detailed simulation of liquid–solid fluidized bed. These models differ in their treatment of the solid phase, ranging from treating each particle individually to treating the collection of particles as a continuum.
Andreu Bernad‐Serra +3 more
wiley +1 more source
Well-posed Dirichlet problems pertaining to the Duffing equation
Electronic Journal of Qualitative Theory of Differential Equations, 2014 In this paper we investigate existence and continuous dependence on functional parameter of Duffing's type equation with Dirichlet boundary value conditions.
Piotr Kowalski
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Nonlinear nonhomogeneous Dirichlet problems with singular and convection terms
Boundary Value Problems, 2020 We consider a nonlinear Dirichlet problem driven by a general nonhomogeneous differential operator and with a reaction exhibiting the combined effects of a parametric singular term plus a Carathéodory perturbation f ( z , x , y ) $f(z,x,y)$ which is only
Nikolaos S. Papageorgiou, Youpei Zhang
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Steklov Spectral Geometry for Extrinsic Shape Analysis
, 2018 We propose using the Dirichlet-to-Neumann operator as an extrinsic alternative to the Laplacian for spectral geometry processing and shape analysis.
Ben-Chen, Mirela +3 more
core +1 more source
Partial identification with categorical data and nonignorable missing outcomes
Canadian Journal of Statistics, EarlyView.Abstract Nonignorable missing outcomes are common in real‐world datasets and often require strong parametric assumptions to achieve identification. These assumptions can be implausible or untestable, and so we may wish to forgo them in favour of partially identified models that narrow the set of a priori possible values to an identification region.
Daniel Daly‐Grafstein, Paul Gustafson
wiley +1 more source
An inverse three spectra problem for Sturm–Liouville operators
Boundary Value Problems, 2018 In this paper, we consider the inverse three spectra problems of recovering the Sturm–Liouville equation by the spectra of the Neumann–Dirichlet boundary value problem on [0,1] $[0,1]$, the Neumann–Robin problem on [0,1/2] $[0,1/2]$, and the Robin ...
Yongxia Guo, Guangsheng Wei, Ruoxia Yao
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Spectral multigrid methods for elliptic equations 2 [PDF]
A detailed description of spectral multigrid methods is provided. This includes the interpolation and coarse-grid operators for both periodic and Dirichlet problems.
Hussaini, M. Y. +2 more
core +1 more source
Front Propagation Through a Perforated Wall
Communications on Pure and Applied Mathematics, EarlyView.ABSTRACT We consider a bistable reaction– diffusion equation ut=Δu+f(u)$u_t=\Delta u +f(u)$ on RN${\mathbb {R}}^N$ in the presence of an obstacle K$K$, which is a wall of infinite span with many holes. More precisely, K$K$ is a closed subset of RN${\mathbb {R}}^N$ with smooth boundary such that its projection onto the x1$x_1$‐axis is bounded and that ...
Henri Berestycki +2 more
wiley +1 more source
Perturbed subcritical Dirichlet problems with variable exponents
Electronic Journal of Differential Equations, 2016 We study a class of nonhomogeneous elliptic problems with Dirichlet boundary condition and involving the p(x)-Laplace operator and power-type nonlinear terms with variable exponent.
Ramzi Alsaedi
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Two open problems for absolutely convergent Dirichlet series [PDF]
Математичні Студії, 2012 For the absolutely convergent in a half-plane Dirichlet series we establish upper estimates without exceptional sets.
O. B. Skaskiv, O. Yu. Zadorozhna
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