Results 31 to 40 of about 1,441,473 (315)

Image Quality Enhancement Model and its Application Based on PDE

open access: yesChemical Engineering Transactions, 2015
Partial differential equations application in digital image processing is developing rapidly in recent years. The method aim to establish a mathematical model with the partial differential equation, and the model will change the image based on partial ...
F. Yuan, Z.P. Wang
doaj   +1 more source

Permeability Models for Magma Flow through the Earth's Mantle: A Lie Group Analysis

open access: yesJournal of Applied Mathematics, 2013
The migration of melt through the mantle of the Earth is governed by a third-order nonlinear partial differential equation for the voidage or volume fraction of melt.
N. Mindu, D. P. Mason
doaj   +1 more source

Q-measure-valued solution of a hyperbolic partial differential equation

open access: yesPartial Differential Equations in Applied Mathematics, 2022
In this article, we introduced a new measure termed as Q-measure to represent a weak* limit of the barycenter of a sequence of Borel measurable function. The Q-measure is defined by replacing the sequence of measurable functions via the barycenter of the
Jisha C.R.
doaj   +1 more source

On the discrete and continuous Miura Chain associated with the Sixth Painlevé Equation [PDF]

open access: yes, 1999
A Miura chain is a (closed) sequence of differential (or difference) equations that are related by Miura or B\"acklund transformations. We describe such a chain for the sixth Painlev\'e equation (\pvi), containing, apart from \pvi itself, a Schwarzian ...
Ablowitz   +25 more
core   +3 more sources

Lie Point Symmetries, Traveling Wave Solutions and Conservation Laws of a Non-linear Viscoelastic Wave Equation

open access: yesMathematics, 2021
This paper studies a non-linear viscoelastic wave equation, with non-linear damping and source terms, from the point of view of the Lie groups theory.
Almudena P. Márquez, María S. Bruzón
doaj   +1 more source

On a complex differential Riccati equation [PDF]

open access: yes, 2007
We consider a nonlinear partial differential equation for complex-valued functions which is related to the two-dimensional stationary Schrodinger equation and enjoys many properties similar to those of the ordinary differential Riccati equation as, e.g.,
Bernstein S   +28 more
core   +2 more sources

Approximate controllability of fractional partial differential equation

open access: yesAdvances in Differential Equations, 2015
In the present paper, by using the theory of semigroup operators and the Schauder fixed point theorem, we define the mild solution of a fractional partial differential equation and obtain the existence and uniqueness of the mild solution.
Fang Wang, Ping Wang, Z. Yao
semanticscholar   +1 more source

Data-driven discovery of partial differential equations [PDF]

open access: yesScience Advances, 2016
Researchers propose sparse regression for identifying governing partial differential equations for spatiotemporal systems. We propose a sparse regression method capable of discovering the governing partial differential equation(s) of a given system by ...
S. Rudy, S. Brunton, J. Proctor, J. Kutz
semanticscholar   +1 more source

SINGULAR SOLUTIONS OF CLAIRAUT-TYPE EQUATIONS IN PARTIAL DERIVATIVES WITH REVERSE TRIGONOMETRIC FUNCTIONS

open access: yesИзвестия высших учебных заведений. Поволжский регион: Физико-математические науки, 2020
Background. The problem of evaluation of the special (singular) solutions of Clairaut-type partial differential equations attracts a lot of interest studying various transformations of nonlinear equations of mathematical physics, for example, Legendre
L. L. Ryskina   +2 more
doaj   +1 more source

Solution of fractional modified Kawahara equation: a semi-analytic approach

open access: yesMathematics in Applied Sciences and Engineering, 2023
The present study examines a semi-analytical method known as the Fractional Residual Power Series Method for obtaining solutions to the non-linear, time-fractional Kawahara and modified Kawahara equations.
Sagar Khirsariya   +2 more
doaj   +1 more source

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