Results 11 to 20 of about 137,740 (294)

Electrical response of optimized DSSC’s by different dye-mordant-assistant combinations: A multi-time-hierarchical theoretical approach

open access: yesResults in Physics, 2021
The electrical response of dye-based photovoltaic cells upon a sudden illumination is explained in terms of a theoretical approach based on a time-hierarchical emergence of several physical processes.
R. Rodríguez   +3 more
doaj   +1 more source

Relaxation Oscillations in Models of Multi-Species Biocenose

open access: yesМоделирование и анализ информационных систем, 2013
Some families of mathematical models of biological populations are considered. Invariant ratios between the parameters which characterize this or that population are revealed.
S. A. Kaschenko
doaj   +3 more sources

Relaxation Oscillations in Singularly Perturbed Generalized Lienard Systems with Non-Generic Turning Points

open access: yesMathematical Modelling and Analysis, 2017
Based on the asymptotic analysis technique developed by Eckhaus [Lecture Notes in Math., vol. 985, pp 449-494. Springer, Berlin, 1983], this paper aims to study the existence and the asymptotic behaviors of relaxation oscillations of regular and canard ...
Huan Hu   +3 more
doaj   +1 more source

Noise in (double) relaxation oscillation SQUIDs [PDF]

open access: yes, 1994
We have modelled the effect of two intrinsic noise sources on the flux noise spectral density of (Double) Relaxation Oscillation SQUIDs ((D)ROSs) based on hysteretic Josephson tunnel junctions.
Adelerhof, Derk Jan   +2 more
core   +3 more sources

Asymptotics of Solutions to a Differential Equation with Delay and Nonlinearity Having Simple Behaviour at Infinity

open access: yesMathematics, 2022
In this paper, we study nonlocal dynamics of a nonlinear delay differential equation. This equation with different types of nonlinearities appears in medical, physical, biological, and ecological applications.
Alexandra Kashchenko
doaj   +1 more source

Frequency versus relaxation oscillations in a semiconductor laser with coherent filtered optical feedback [PDF]

open access: yes, 2005
We investigate the dynamics of a semiconductor laser subject to coherent delayed filtered optical feedback. A systematic bifurcation analysis reveals that this system supports two fundamentally different types of oscillations, namely relaxation ...
Erzgraber, H   +4 more
core   +3 more sources

Giant Relaxation Oscillations in a Very Strongly Hysteretic SQUID ring-Tank Circuit System [PDF]

open access: yes, 2001
In this paper we show that the radio frequency (rf) dynamical characteristics of a very strongly hysteretic SQUID ring, coupled to an rf tank circuit resonator, display relaxation oscillations.
A. R. Bulsara   +17 more
core   +2 more sources

Blue Sky Catastrophe in Systems with Non-classical Relaxation Oscillations

open access: yesМоделирование и анализ информационных систем, 2015
The feasibility of a known blue-sky bifurcation in a class of three-dimensional singularly perturbed systems of ordinary differential equations with one fast and two slow variables is studied.
S. D. Glyzin   +2 more
doaj   +1 more source

A nested bistable module within a negative feedback loop ensures different types of oscillations in signaling systems

open access: yesScientific Reports, 2023
In this article, we consider a double phosphorylation cycle, a ubiquitous signaling component, having the ability to display bistability, a behavior strongly related to the existence of positive feedback loops.
Juan Ignacio Marrone   +2 more
doaj   +1 more source

Predator–prey systems with small predator's death rate

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2018
The goal of our paper is to study canard relaxation oscillations of predator–prey systems with Holling type II of functional response when the death rate of predator is very small and the conversion rate is uniformly positive.
Renato Huzak
doaj   +1 more source

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