Results 11 to 20 of about 235,061 (287)

A novel envelope simulation technique for high-frequency nonlinear circuits [PDF]

open access: yes, 2003
The paper proposes a new approach for the analysis and simulation of circuits subject to input signals with widely separated rates of variation. Such signals arise in communication circuits when an RF carrier is modulated by a low-frequency information ...
Condon, Marissa, Dautbegovic, Emira
core   +1 more source

Cubic nonlinear differential system, their periodic solutions and bifurcation analysis

open access: yesAIMS Mathematics, 2021
<abstract><p>In this article, periodic solutions from a fine focus $ U = 0 $, are accomplished for several classes. Some classes have polynomial coefficients, while the remaining classes $ C_{14, 7} $, $ C_{16, 8} $ and $ C_{5, 5}, $ $ C_{6, 6} $ have non-homogeneous and homogenous trigonometric coefficients accordingly.
Saima Akram, Allah Nawaz, Mariam Rehman
openaire   +3 more sources

Dynamics and optical solitons in polarization-preserving fibers for the cubic–quartic complex Ginzburg–Landau equation with quadratic–cubic law nonlinearity

open access: yesResults in Physics, 2023
In this paper, the cubic–quartic complex Ginzburg–Landau (CGL) equation is investigated by using the trial function method. The traveling wave hypothesis is applied to convert the CGL equation to an ordinary differential equation (ODE), which is ...
Chen Peng, Zhao Li
doaj   +1 more source

Blow-up solutions of cubic differential systems

open access: yesJournal of Mathematical Analysis and Applications, 2008
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Baris, J., Wawiórko, E.
openaire   +2 more sources

CENTER CONDITIONS FOR A CUBIC DIFFERENTIAL SYSTEM WITH ONE INVARIANT STRAIGHT LINE

open access: yesActa et Commentationes: Ştiinţe Exacte şi ale Naturii, 2020
We find conditions for a singular point
Dumitru COZMA, Angela MATEI
doaj   +1 more source

Mathematical analysis for classical Chua's circuit with two nonlinear resistors [PDF]

open access: yesSongklanakarin Journal of Science and Technology (SJST), 2020
We formulate a mathematical model for the classical Chua’s circuit with two nonlinear resistors in terms of a system of nonlinear ordinary differential equations.
Natchaphon Limphodaen   +1 more
doaj   +1 more source

Control bifurcations [PDF]

open access: yes, 2004
A parametrized nonlinear differential equation can have multiple equilibria as the parameter is varied. A local bifurcation of a parametrized differential equation occurs at an equilibrium where there is a change in the topological character of the ...
Chang, Dong Eui   +2 more
core   +2 more sources

High Accuracy Spline Explicit Group (SEG) Approximation for Two Dimensional Elliptic Boundary Value Problems. [PDF]

open access: yesPLoS ONE, 2015
Over the last few decades, cubic splines have been widely used to approximate differential equations due to their ability to produce highly accurate solutions.
Joan Goh, Norhashidah Hj M Ali
doaj   +1 more source

Analytic integrability of cubic–linear planar polynomial differential systems

open access: yesJournal of Differential Equations, 2016
The first author is partially supported by the MINECO/FEDER grant number MTM2014- 53703-P and the AGAUR (Generalitat de Catalunya) grant number 2014SGR 1204.
Giné, Jaume, Valls, Claudia
openaire   +3 more sources

Algebraic invariants of planar cubic differential systems

open access: yes, 2017
With the help of the Gurevich theorem we find a minimal system of generators of centro-affne covariants of homogeneous planar cubic differential systems with free terms.
HEZZAM, Anis   +2 more
openaire   +2 more sources

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