Results 11 to 20 of about 8,893 (260)
Global phase portraits of a SIS model [PDF]
Applied Mathematics and Computation, 2013 In the qualitative theory of ordinary differential equations, we can find many papers whose objective is the classification of all the possible topological phase portraits of a given family of differential system. Most of the studies rely on systems with real parameters and the study consists of outlining their phase portraits by finding out some ...
Regilene D. S. Oliveira, Alex C. Rezende
openaire +3 more sources
Open Physics, 2021 We formulated the oscillators with position-dependent finite symmetric decreasing and increasing mass. The classical phase portraits of the systems were studied by analytical approach (He’s frequency formalism).
Rath Biswanath +5 more
doaj +1 more source
Archives of Public Health, 2021 Using publicly available data on the number of new hospitalisations we use a newly developed statistical model to produce a phase portrait to monitor the epidemic allowing for assessing whether or not intervention measures are needed to keep hospital ...
Christel Faes, Niel Hens, Marius Gilbert
doaj +1 more source
Review Article: "The Lagrangian description of aperiodic flows: a case study of the Kuroshio Current" [PDF]
Nonlinear Processes in Geophysics, 2012 This article reviews several recently developed Lagrangian tools and shows how their combined use succeeds in obtaining a detailed description of purely advective transport events in general aperiodic flows.
C. Mendoza, A. M. Mancho
doaj +1 more source
Phase portraits of the Higgins–Selkov system
Discrete and Continuous Dynamical Systems - B, 2022 In this paper we study the dynamics of the Higgins-Selkov system x˙=1-xyγ,y˙=αy(xyγ-1-1), where α is a real parameter and γ > 1 is an integer. We classify the phase portraits of this system for γ = 3,4,5,6, in the Poincaré disc for all the values of the parameter α.
Llibre, Jaume, Mousavi, Marzieh
openaire +4 more sources
Characterization of a Dual Nonlinear Helmholtz Resonator
Micromachines, 2022 Resonant elements can generate small amounts of energy that make them pertinent for feeding miniaturized accelerometers with the energy needed. Suitable oscillator candidates are Helmholtz resonators, which have been, for a long time, analyzed and ...
Maher O. Al-Turk +2 more
doaj +1 more source
On Targeted Control over Trajectories of Dynamical Systems Arising in Models of Complex Networks
Mathematics, 2023 The question of targeted control over trajectories of systems of differential equations encountered in the theory of genetic and neural networks is considered. Examples are given of transferring trajectories corresponding to network states from the basin
Diana Ogorelova +2 more
doaj +1 more source
Phase Portraits of the Leslie-Gower System
Acta Mathematica Scientia, 2022 In this paper we characterize the phase portraits of the Leslie-Gower model for competition among species. We give the complete description of their phase portraits in the Poincaré disc (i.e., in the compactification of R adding the circle S of the infinity) modulo topological equivalence. It is well-known that the equilibrium point of the Leslie-Gower
Llibre, Jaume, Valls, Claudia
openaire +2 more sources
Model of an automated biotechnical system for analyzing pulseograms as a kind of edge devices
Journal of Edge Computing, 2023 The rapid development of computer biometrics over the past 2-3 decades is largely due to the development and widespread introduction into clinical practice of new methods of studying human body health, including pulse methods.
Tetiana M. Nikitchuk +3 more
doaj +1 more source
Analysis of stochastic bifurcations with phase portraits [PDF]
PLOS ONE, 2018 We propose a method to obtain phase portraits for stochastic systems. Starting from the Fokker-Planck equation, we separate the dynamics into a convective and a diffusive part. We show that stable and unstable fixed points of the convective field correspond to maxima and minima of the stationary probability distribution if the probability current ...
Marc Mendler +2 more
openaire +5 more sources