Results 21 to 30 of about 120,268,381 (251)

On C-To-R-Based Iteration Methods for a Class of Complex Symmetric Weakly Nonlinear Equations

open access: yesMathematics, 2020
To avoid solving the complex systems, we first rewrite the complex-valued nonlinear system to real-valued form (C-to-R) equivalently. Then, based on separable property of the linear and the nonlinear terms, we present a C-to-R-based Picard iteration ...
Min-Li Zeng, Guo-Feng Zhang
doaj   +1 more source

A frequency-domain approach to the analysis of stability and bifurcations in nonlinear systems described by differential-algebraic equations [PDF]

open access: yes, 2007
A general numerical technique is proposed for the assessment of the stability of periodic solutions and the determination of bifurcations for limit cycles in autonomous nonlinear systems represented by ordinary differential equations in the differential ...
Bonani, Fabrizio   +3 more
core   +1 more source

Structural stability for the Forchheimer equations interfacing with a Darcy fluid in a bounded region in R 3 $\mathbb{R}^{3}$

open access: yesBoundary Value Problems, 2021
The structural stability for the Forchheimer fluid interfacing with a Darcy fluid in a bounded region in R 3 $\mathbb{R}^{3}$ was studied. We assumed that the nonlinear fluid was governed by the Forchheimer equations in Ω 1 $\Omega _{1}$ , while in Ω 2 $\
Jincheng Shi, Yan Liu
doaj   +1 more source

On the oscillation of second order nonlinear neutral delay difference equations

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2008
In this paper sufficient conditions are obtained for oscillation of all solutions of a class of nonlinear neutral delay difference equations of the form $\Delta^2(y(n)+p(n)y(n-m))+q(n)G(y(n-k))=0$ under various ranges of $p(n)$. The nonlinear function $G,
A. K. Tripathy
doaj   +1 more source

An Implicit Difference Scheme for the Fourth-Order Nonlinear Evolution Equation with Multi-Term Riemann–Liouvile Fractional Integral Kernels

open access: yesFractal and Fractional, 2022
In this paper, an implicit difference scheme is proposed and analyzed for a class of nonlinear fourth-order equations with the multi-term Riemann–Liouvile (R–L) fractional integral kernels.
Xiaoxuan Jiang   +3 more
doaj   +1 more source

Structural and biochemical insights into the thermostable esterase Ta0887 from Thermoplasma acidophilum

open access: yesFEBS Open Bio, EarlyView.
In this study, a novel esterase from the thermoacidophilic archaeon Thermoplasma acidophilum was biochemically and structurally characterized. Our results demonstrate that Ta0887 is a highly thermostable esterase that preferentially hydrolyzes p‐nitrophenyl hexanoate and possesses an α‐helical cap domain that likely contributes to its substrate ...
Alejandro Delgado‐Rey   +4 more
wiley   +1 more source

Linearisation of a second-order nonlinear ordinary differential equation

open access: yesActa Polytechnica, 2023
We analyse nonlinear second-order differential equations in terms of algebraic properties by reducing a nonlinear partial differential equation to a nonlinear second-order ordinary differential equation via the point symmetry f(v)∂v.
Adhir Maharaj   +3 more
doaj   +1 more source

Optimal solution of nonlinear equations [PDF]

open access: yes, 1985
journal articleWe survey recent worst case complexity results for the solution of nonlinear equations. Notes on worst and average case analysis of iterative algorithms and a bibliography of the subject are also ...
Optimal solution; Nonlinear equations   +1 more
core  

Type I interferons modulate autophagy to shape gemcitabine response in pancreatic cancer cells

open access: yesFEBS Open Bio, EarlyView.
Type I interferons differentially modulate autophagy and the response of pancreatic cancer cells to gemcitabine. IFNα2b stimulates autophagic flux and protects cells from gemcitabine‐induced cell death, contributing to chemoresistance. In contrast, IFNβ1a inhibits autophagosome formation and enhances gemcitabine‐induced cell death, resulting in ...
Lucy E. Bonilla   +10 more
wiley   +1 more source

Noncommutative Reduction of Nonlinear Schrödinger Equation on Lie Groups

open access: yesUniverse, 2022
We propose a new approach that allows one to reduce nonlinear equations on Lie groups to equations with a fewer number of independent variables for finding particular solutions of the nonlinear equations.
Alexander Breev   +2 more
doaj   +1 more source

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