Results 51 to 60 of about 3,753 (167)

Modeling Heavy Metal Sorption and Interaction in a Multispecies Biofilm

open access: yesMathematics, 2019
A mathematical model able to simulate the physical, chemical and biological interactions prevailing in multispecies biofilms in the presence of a toxic heavy metal is presented.
Berardino D’Acunto   +3 more
doaj   +1 more source

Superdiffusions and Parabolic Nonlinear Differential Equations

open access: yesThe Annals of Probability, 1992
The model under consideration is a \(d\)-dimensional superdiffusion \(X\) with parameters \((L,\alpha)\); that is, \(X\) is related to the parabolic differential equation \((\partial/\partial r)\nu+L\nu-|\nu|^ \alpha=-\rho\).
openaire   +3 more sources

A parabolic-hyperbolic free boundary problem modeling tumor growth with drug application

open access: yesElectronic Journal of Differential Equations, 2010
In this article, we study a free boundary problem modeling the growth of tumors with drug application. The model consists of two nonlinear second-order parabolic equations describing the diffusion of nutrient and drug concentration, and three ...
Ji-Hong Zhao
doaj  

Existence results for a class of nonlinear parabolic equations in Orlicz spaces

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2010
An existence result of a renormalized solution for a class of nonlinear parabolic equations in Orlicz spaces is proved. No growth assumption is made on the nonlinearities.
Hicham Redwane
doaj   +1 more source

Numerical solving of coupled systems of parabolic and ordinary differential equations

open access: yesNonlinear Analysis, 2010
Two coupled systems of parabolic and nonlinear ordinary differential equations arising in kinetics of heterogeneous reactions are studied numerically by using computer calculations. Some numerical results are discussed.
V. Skakauskas, P. Katauskis
doaj   +1 more source

A finite difference method for nonlinear parabolic-elliptic systems of second order partial differential equations [PDF]

open access: yesOpuscula Mathematica, 2007
This paper deals with a finite difference method for a wide class of weakly coupled nonlinear second-order partial differential systems with initial condition and weakly coupled nonlinear implicit boundary conditions.
Marian Malec, Lucjan Sapa
doaj  

Parabolic equations with discontinuous nonlinearities [PDF]

open access: yesBulletin of the Australian Mathematical Society, 2001
In this paper we deal with the homogeneous Cauchy-Dirichlet problem for a class of parabolic equations with either Carathéodory or discontinuous nonlinear terms. We then present an application and explicitly point out an existence result for a differential inclusion, which can be applied to the classical Stefan problem.
openaire   +1 more source

Existence and number of solutions to semilinear equations with applications to boundary-value problems

open access: yesElectronic Journal of Differential Equations, 2000
solutions to nonlinear equations and to (non)resonant semilinear equations involving nonlinear perturbations of Fredholm maps of index zero. We apply our results to semilinear elliptic, and to semilinear parabolic and hyperbolic periodic boundary-value ...
P. S. Milojevic
doaj  

Estimates for nonlinear parabolic equations.

open access: yes, 1999
Summary: We study smooth non-negative solutions of the equation \(u_t=\partial_j a_j(u,\nabla u)+a_0(u,\Delta u)\) in the strip \(S_T= \mathbb{R}^d\times (0,T)\), \(d\geq 1\). A regularizing effect, pointwise estimates and gradient estimates are obtained.
Fabricant, A., Marinov, M., Rangelov, T.
openaire   +2 more sources

Home - About - Disclaimer - Privacy