Results 71 to 80 of about 155 (123)

The frequency-dependent Wright-Fisher model: diffusive and non-diffusive approximations [PDF]

, 2013
. We study a class of processes that are akin to the Wright-Fisher model, with transition prob-abilities weighted in terms of the frequency-dependent fitness of the population types. By considering an approximate weak formulation of the discrete problem,
Fabio A. C. C. Chalub, Max O. Souza, Chalub, Fábio Augusto da Costa Carvalho, Souza, Max O.   +3 more
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Asymptotic behavior of solutions of a free boundary model with seasonal succession and impulsive harvesting

Advances in Nonlinear Analysis
In this article, we consider the influence of seasonal succession and impulsive harvesting on the dynamical behavior of solutions to a free boundary model. First, the generalized principal eigenvalue is defined and its properties are studied.
Li Yanglei, Han Xuemei, Sun Ningkui
doaj   +1 more source

Reaction-diffusion systems with 1-homogeneous non-linearity

Electronic Journal of Differential Equations, 2002
We describe the dynamics of a system of two reaction-diffusion equations with 1-homogeneous non-linearity. We show that either an order-preserving property holds and can be used in order to determine the limiting behaviour in some (invariant) sets or the
Matthias Bueger
doaj  

Complex dynamics of a nonlinear discrete predator-prey system with Allee effect

Open Mathematics
The transition between strong and weak Allee effects in prey provides a simple regime shift in ecology. In this article, we study a discrete predator-prey system with Holling type II functional response and Allee effect. First, the number of fixed points
Wang Jing, Lei Ceyu
doaj   +1 more source

T.: A quasi-linear system of chemotaxis

, 2006
We consider the blow up mechanism for a perturbed system of chemotaxis. First, using Moser's iteration scheme the blow up point of the solution is characterized in terms of the local Zygmund norm.
Masaki Kurokiba, Takashi Suzuki
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CNN Modelling of Nano-Inclusions [PDF]

, 2015
[Slavova Angela; Славова Анжела]; [Markova Maya; Маркова Мая]Piezoelectrical material with heterogeneities of nano-inclusions is considered in the case when it is subjected to time harmonic electro-mechanical load.
Slavova, Angela, Markova, Maya
core  

Stability of pyramidal traveling fronts in time-periodic reaction–diffusion equations with degenerate monostable and ignition nonlinearities

Advances in Nonlinear Analysis
This article is concerned with the stability of time-periodic traveling fronts for reaction–diffusion equations with time-periodic degenerate monostable and ignition nonlinearities.
Liu Yuan-Hao, Bu Zhen-Hui, Zhang Suobing
doaj   +1 more source

Dynamics of particulate emissions in the presence of autonomous vehicles

Open Mathematics
Around one third of CO2{{\rm{CO}}}_{2} emissions in the atmosphere are linked to vehicular traffic. Pollutant agents have an impact on the environment, in particular, the increased presence of particulate matter (PM) creates negative effects on human ...
Briani Maya, Denaro Christopher Anthony, Piccoli Benedetto, Rarità Luigi   +3 more
doaj   +1 more source

Invariant Regions and Global Existence of Uniqueness Weak Solutions for Tridiagonal Reaction-Diffusion Systems

In this paper we study the existence of uniqueness global weak solutions for m × m reaction-diffusion systems for which two main properties hold: the positivity of the weak solutions and the total mass of the components are preserved with time. Moreover,
BARROUK, Nabila, ABDELMALEK, Karima, REDJOUH, Mounir   +2 more
core   +1 more source

A characterization of relatively compact sets in $L^p(\Omega,B)$: Dedicated to Professor Gheorghe Coman on the occasion of his 80th anniversary

, 2016
We give a characterization of relatively compact sets $F$ in $L^p(\Omega,B)$ for $p\in [1,\infty)$, $B$ a Banach-space, and $\Omega \subset \R^n$. This is a generalization of the results obtained in \cite{Simon} for the space $L^p((0,T),B)$ with $T>0$,
NEUSS-RADU, Maria, GAHN, Markus
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