Results 21 to 30 of about 960,683 (280)

New Exact Solutions of the New Hamiltonian Amplitude-Equation and Fokas Lenells Equation

open access: yesEntropy, 2015
In this paper, exact solutions of the new Hamiltonian amplitude equation and Fokas-Lenells equation are successfully obtained. The extended trial equation method (ETEM) and generalized Kudryashov method (GKM) are applied to find several exact solutions ...
Seyma Tuluce Demiray, Hasan Bulut
doaj   +1 more source

A Study on the Amplitude Comparison Monopulse Algorithm

open access: yesApplied Sciences, 2020
This paper presents two amplitude comparison monopulse algorithms and their covariance prediction equation. The proposed algorithms are based on the iterated least-squares estimation method and include the conventional monopulse algorithm as a special ...
Minjeong Kim, Daseon Hong, Sungsu Park
doaj   +1 more source

Depth-Extrapolation-Based True-Amplitude Full-Wave-Equation Migration from Topography

open access: yesApplied Sciences, 2021
The lack of an initial condition is one of the major challenges in full-wave-equation depth extrapolation. This initial condition is the vertical partial derivative of the surface wavefield and cannot be provided by the conventional seismic acquisition ...
Hao Liu, Xuewei Liu
doaj   +1 more source

Three-Body Scattering Below Breakup Threshold: An Approach without using Partial Waves [PDF]

open access: yes, 1999
The Faddeev equation for three-body scattering below the three-body breakup threshold is directly solved without employing a partial wave decomposition. In the simplest form it is a three-dimensional integral equation in four variables. From its solution
Elster, Ch., Gloeckle, W., Schadow, W.
core   +4 more sources

Master Equations for Master Amplitudes

open access: yes, 1998
11 pages, Latex, 1 encapsulated Postscript figure with epsfig, some references added; Talk presented at the Zeuthen Workshop on Elementary Particle Physics - Loops and Legs in Gauge Theories - Rheinsberg, 19-24 April ...
Caffo, M.   +3 more
openaire   +4 more sources

Nonlocal delay gives rise to vegetation patterns in a vegetation-sand model

open access: yesMathematical Biosciences and Engineering
The vegetation pattern generated by aeolian sand movements is a typical type of vegetation patterns in arid and semi-arid areas. This paper presents a vegetation-sand model with nonlocal interaction characterized by an integral term with a kernel ...
Jichun Li , Gaihui Guo, Hailong Yuan
doaj   +1 more source

Two-dimensional stable lattice Boltzmann simulation of turbulent flow in wavy walled channel

open access: yesAIP Advances, 2023
In recent years, the lattice Boltzmann equation has developed into a promising technique for computational fluid dynamics (CFD). The lattice Boltzmann model (LBM) approach is derived from the Boltzmann equation and kinetic theory, as opposed to the ...
Riffat Habib   +4 more
doaj   +1 more source

A Linear Evolution for Non-Linear Dynamics and Correlations in Realistic Nuclei

open access: yes, 2003
A new approach to high energy evolution based on a linear equation for QCD generating functional is developed. This approach opens a possibility for systematic study of correlations inside targets, and, in particular, inside realistic nuclei.
Adcox   +84 more
core   +2 more sources

Nonmodal amplitude equations

open access: yesPhysical Review E
We consider fluid flows for which the linearized Navier-Stokes operator is strongly non-normal. The responses of such flows to external perturbations are spanned by a generically very large number of non-orthogonal eigenmodes. They are therefore qualified as ``nonmodal" responses, to insist on the inefficiency of the eigenbasis to describe them. In the
Yves-Marie Ducimetière   +1 more
openaire   +2 more sources

The spatiotemporal dynamics of a diffusive predator-prey model with double Allee effect

open access: yesAIMS Mathematics
We introduce a diffusive predator-prey system with the double Allee effect, focusing on the stability and sufficient conditions for the coexistence of prey and predator.
Lingling Li , Xuechen Li
doaj   +1 more source

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