Results 51 to 60 of about 368,146 (227)

Heat Transfer Analysis for Stationary Boundary Layer Slip Flow of a Power-Law Fluid in a Darcy Porous Medium with Plate Suction/Injection. [PDF]

open access: yesPLoS ONE, 2015
In this paper, we investigate the slip effects on the boundary layer flow and heat transfer characteristics of a power-law fluid past a porous flat plate embedded in the Darcy type porous medium.
Asim Aziz   +3 more
doaj   +1 more source

Adaptive Finite Element Solution of Multiscale PDE-ODE Systems

open access: yes, 2014
We consider adaptive finite element methods for solving a multiscale system consisting of a macroscale model comprising a system of reaction-diffusion partial differential equations coupled to a microscale model comprising a system of nonlinear ordinary ...
Carey, V.   +6 more
core   +1 more source

Reduction of Algebraic Parametric Systems by Rectification of their Affine Expanded Lie Symmetries [PDF]

open access: yes, 2006
Lie group theory states that knowledge of a $m$-parameters solvable group of symmetries of a system of ordinary differential equations allows to reduce by $m$ the number of equations. We apply this principle by finding some \emph{affine derivations} that
G. Bluman   +5 more
core   +8 more sources

Control and Trajectory Planning of an Autonomous Bicycle Robot

open access: yesComputation, 2022
This paper addresses the modeling and the control of an autonomous bicycle robot where the reference point is the center of gravity. The controls are based on the wheel heading’s angular velocity and the steering’s angular velocity.
Masiala Mavungu
doaj   +1 more source

The Differential Counting Polynomial [PDF]

open access: yes, 2015
The aim of this paper is a quantitative analysis of the solution set of a system of polynomial nonlinear differential equations, both in the ordinary and partial case.
Lange-Hegermann, Markus
core  

On the algorithmic linearizability of nonlinear ordinary differential equations

open access: yesJournal of symbolic computation, 2020
Solving nonlinear ordinary differential equations is one of the fundamental and practically important research challenges in mathematics. However, the problem of their algorithmic linearizability so far remained unsolved. In this contribution, we propose
D. Lyakhov, V. Gerdt, D. Michels
semanticscholar   +1 more source

Oscillator representations and systems of ordinary differential equations [PDF]

open access: yesProceedings of the National Academy of Sciences, 2000
Using representation-theoretic methods, we determine the spectrum of the 2 × 2 system \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \setlength{\oddsidemargin}{-69pt} \begin{document} \begin{equation*}
Parmeggiani A., Wakayama M.
openaire   +4 more sources

Moment and SDP relaxation techniques for smooth approximations of problems involving nonlinear differential equations

open access: yes, 2010
Combining recent moment and sparse semidefinite programming (SDP) relaxation techniques, we propose an approach to find smooth approximations for solutions of problems involving nonlinear differential equations.
Henrion, Didier   +2 more
core   +2 more sources

Discrete Processes and Chaos in Systems of Ordinary Differential Equations

open access: yesJournal of Optimization, Differential Equations and Their Applications, 2022
A method for constructing a one-dimensional discrete mapping describing a certain periodic process in a general system of ordinary autonomous differential equations is proposed.
Vasiliy Ye. Belozyorov   +1 more
doaj   +1 more source

A spectral-based numerical method for Kolmogorov equations in Hilbert spaces

open access: yes, 2016
We propose a numerical solution for the solution of the Fokker-Planck-Kolmogorov (FPK) equations associated with stochastic partial differential equations in Hilbert spaces.
Delgado-Vences, Francisco J.   +1 more
core   +1 more source

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