Results 41 to 50 of about 2,892,052 (129)

On some pseudo-differential equations and transmutation operators [PDF]

open access: yes, 2020
We describe some operators for solving model elliptic pseudo-differential equations in special canonical domains. It helps us to write a general solution of corresponding pseudo-differential equation in an explicit form.
Vasilyev, V.
core   +1 more source

Boundary-value problems in a layer for evolutionary pseudo-differential equations with integral conditions

open access: yesVisnik Harkivsʹkogo Nacionalʹnogo Universitetu im. V.N. Karazina. Cepiâ Matematika, Prikladna Matematika i Mehanika, 2018
Boundary-value problems for evolutionary pseudo-differential equations with an integral condition are studied. Necessary and sufficient conditions of well-posedness are obtained for these problems in the Schwartz spaces.
A. A. Makarov, D. A. Levkin
doaj  

Quasi-P-Wave Reverse Time Migration in TTI Media with a Generalized Fractional Convolution Stencil

open access: yesFractal and Fractional
In seismic modeling and reverse time migration (RTM), incorporating anisotropy is crucial for accurate wavefield modeling and high-quality images. Due to the trade-off between computational cost and simulation accuracy, the pure quasi-P-wave equation has
Shanyuan Qin   +4 more
doaj   +1 more source

Stochastic models associated to a Nonlocal Porous Medium Equation

open access: yesModern Stochastics: Theory and Applications, 2018
The nonlocal porous medium equation considered in this paper is a degenerate nonlinear evolution equation involving a space pseudo-differential operator of fractional order.
Alessandro De Gregorio
doaj   +1 more source

Periodic solutions to a class of distributed delay differential equations via variational methods

open access: yesAdvances in Nonlinear Analysis, 2023
In this article, we study the existence of periodic solutions to a class of distributed delay differential equations. We transform the search for periodic solutions with the special symmetry of a delay differential equation to the problem of finding ...
Xiao Huafeng, Guo Zhiming
doaj   +1 more source

Chebyshev pseudo-spectral method for optimal control problem of Burgers’ equation [PDF]

open access: yesIranian Journal of Numerical Analysis and Optimization, 2019
In this study, an indirect method is proposed based on the Chebyshev pseudo-spectral method for solving optimal control problems governed by Burgers’ equation.
F. Mohammadizadeh   +2 more
doaj   +1 more source

Pseudo almost automorphic behavior of solutions to a semi-linear fractional differential equation [PDF]

open access: yes, 2015
In this paper, we shall deal with $\mu$-pseudo almost automorphic solutions to a semi-linear fractional differential equation by new concept of $\mu$-pseudo almost automorphic functions presented recently.
Luo, Xiao-Xia, Chang, Yong-Kui
core   +1 more source

Pseudo-Equilibrium Equation of Calcium Phosphate Precipitation from Aqueous Solution [PDF]

open access: yes, 2019
An X-ray amorphous phase is frequently present at the early stage of calcium phosphate crystallization, and the relevant solution chemistry is essential for understanding the mechanism of reaction.
Gang, Wu   +4 more
core   +1 more source

Flows equivalences

open access: yesApplied General Topology, 2001
Given a differential equation on an open set O of an n-manifold we can associate to it a pseudo-flow, that is, a flow whose trajectories may not be defined in the entire real line.
Gabriel Soler López
doaj   +1 more source

Partial Differential Equations-Based Iterative Denoising Algorithm for Movie Images

open access: yesAdvances in Mathematical Physics, 2021
Film video noise can usually be defined as the error information visible on the video image, caused by the digital signal system. This distortion is inevitably present in the video obtained by various camera equipment.
Pingli Sun   +3 more
doaj   +1 more source

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