Results 71 to 80 of about 25,515 (266)

A Fold Bifurcation Theorem of Degenerate Solutions in a Perturbed Nonlinear Equation

open access: yesAbstract and Applied Analysis, 2011
We consider a nonlinear equation F(ε,λ,u)=0, where the parameter ε is a perturbation parameter, F is a differentiable mapping from R×R×X to Y, and X, Y are Banach spaces.
Ping Liu, Yuwen Wang
doaj   +1 more source

On the deduction and quantification of irruptive dynamics in mountain pine beetle population and proxy data

open access: yesJournal of Applied Entomology, Volume 149, Issue 3, Page 309-323, April 2025.
Abstract In attempting to develop a coherent description of the irruptive dynamics of mountain pine beetle (MPB) in North America, we examined a range of cases where authors described the dependency of intrinsic population growth rates on population attack levels.
B. J. Cooke   +2 more
wiley   +1 more source

Numerical and analytical study of bifurcations in a model of electrochemical reactions in fuel cells [PDF]

open access: yes, 2013
The bifurcations in a three-variable ODE model describing the oxygen reduction reaction on platinum surface is studied. The investigation is motivated by the fact that this reaction plays an important role in fuel cells.
Csörgő, Gábor, Simon L., Péter
core   +1 more source

Bifurcation analysis of a wild and sterile mosquito model

open access: yesMathematical Biosciences and Engineering, 2019
The bifurcation of an ordinary differential equation model describing interaction of the wild and the released sterile mosquitoes is analyzed.
Xiaoli Wang, Junping Shi, Guohong Zhang
doaj   +1 more source

Two new species of stone loaches of the genus Barbatula (Cypriniformes: Nemacheilidae) from Europe with a neotype designation of B. barbatula (Teleostei: Nemacheilidae)

open access: yesJournal of Fish Biology, EarlyView.
Abstract Ten species of Barbatula are recognised in Europe, west of the Urals: B. barbatula, B. caucasica, B. hispanica, B. leoparda, B. pironae, B. quignardi, B. sturanyi, B. taurica, B. vardarensis and B. zetensis, with B. caucasica and B. taurica formerly considered subspecies of B. barbatula.
Bárbara B. Calegari   +6 more
wiley   +1 more source

Scaling in activated escape of underdamped systems

open access: yes, 2005
Noise-induced escape from a metastable state of a dynamical system is studied close to a saddle-node bifurcation point, but in the region where the system remains underdamped.
A. P. Dmitriev   +10 more
core   +1 more source

A Series of Saddle - Node Bifurcation and Chaotic Behavior of a Family of a Semi - Triangular Maps [PDF]

open access: yesAl-Rafidain Journal of Computer Sciences and Mathematics, 2013
This paper studies the bifurcations in dynamics of a family of semi-triangular maps . We will prove that this family has a series of Saddle-node bifurcations and a period doubling bifurcation.
Salma Faris, Ammar Jameel
doaj   +1 more source

Dynamic analysis of a Leslie-Gower predator-prey model with the fear effect and nonlinear harvesting

open access: yesMathematical Biosciences and Engineering, 2023
In this paper, we investigate the stability and bifurcation of a Leslie-Gower predator-prey model with a fear effect and nonlinear harvesting. We discuss the existence and stability of equilibria, and show that the unique equilibrium is a cusp of ...
Hongqiuxue Wu, Zhong Li, Mengxin He
doaj   +1 more source

Hopf-zero bifurcation of Oregonator oscillator with delay

open access: yesAdvances in Difference Equations, 2018
In this paper, we study the Hopf-zero bifurcation of Oregonator oscillator with delay. The interaction coefficient and time delay are taken as two bifurcation parameters. Firstly, we get the normal form by performing a center manifold reduction and using
Yuting Cai, Liqin Liu, Chunrui Zhang
doaj   +1 more source

Nonautonomous saddle-node bifurcations: Random and deterministic forcing

open access: yesJournal of Differential Equations, 2012
17 pages, 5 ...
Tobias Jäger, Vasso Anagnostopoulou
openaire   +3 more sources

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