Results 61 to 70 of about 537,575 (240)

ISAR Imaging Based on the Wideband Hyperbolic Frequency-ModulationWaveform

open access: yesSensors, 2015
The hyperbolic frequency-modulated (HFM) waveform has an inherent Doppler-invariant property. It is more conducive than the conventional linear frequency-modulated (LFM) waveform to high speed moving target imaging.
Wei Zhou   +4 more
doaj   +1 more source

On a Control Problem by Lumped-Parameter at the Right-Hand Side of the Semi-Linear Hyperbolic System

open access: yesИзвестия Иркутского государственного университета: Серия "Математика", 2015
At the article an optimal control problem by a first order system of semi-linear hyperbolic equations in the class of smooth control function is studied.
A.V. Arguchintsev, V.P. Poplevko
doaj  

Dynamic event-triggered predefined-time consensus for first-order nonlinear multiagent systems

open access: yes工程科学学报
To ensure fast convergence speed and save communication resources, a dynamic event-triggered predefined-time consensus algorithm is proposed for nonlinear multiagent systems in this study.
Jinglong SHI   +3 more
doaj   +1 more source

Singular solutions for 2x2 systems in nonconservative form with incomplete set of eigenvectors

open access: yesElectronic Journal of Differential Equations, 2013
In this article, we study the initial-value problem for two first-order systems in non-conservative form. The first system arises in elastodynamics and belongs to the class of strictly hyperbolic, genuinely nonlinear systems.
Anupam Pal Choudhury
doaj  

Explicit Exact Solutions of the (2+1)-Dimensional Integro-Differential Jaulent–Miodek Evolution Equation Using the Reliable Methods

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2020
In this article, we utilize the G′/G2-expansion method and the Jacobi elliptic equation method to analytically solve the (2 + 1)-dimensional integro-differential Jaulent–Miodek equation for exact solutions.
Supaporn Kaewta   +2 more
doaj   +1 more source

Relative entropy methods for hyperbolic and diffusive limits [PDF]

open access: yes, 2012
We review the relative entropy method in the context of hyperbolic and diffusive relaxation limits of entropy solutions for various hyperbolic models.
Tzavaras, Athanasios E.   +1 more
core  

Spatial Decay Estimates for a Class of Thermoelastic Plates

open access: yesInternational Journal of Mathematics and Mathematical Sciences
This study investigates the spatial characteristics of solutions for a class of thermoelastic plates governed by biharmonic operators within a semi-infinite strip in two-dimensional Euclidean space R2. The research begins with the derivation of an energy
Jincheng Shi, Naiqiao Qing
doaj   +1 more source

ABOUT ANALYTICAL METHOD FOR SOLVING THE CAUCHY PROBLEM OF TWO QUASILINEAR HYPERBOLIC EQUATIONS SYSTEM

open access: yesНаучный вестник МГТУ ГА, 2018
The applicability of the V. Lychagin "manual" integration method is analyzed with respect to systems of two quasilinear hyperbolic differential equations of the first order with two independent variables t, x and two unknown functions u = u (t, x) and v =
A. A. Gorinov
doaj   +1 more source

Multivalued solutions of multidimensional linear equations of heat conduction and rivertons

open access: yesИзвестия высших учебных заведений. Поволжский регион: Физико-математические науки, 2021
Background. The article considers the problem of calculating multivalued solutions of multidimensional linear parabolic equations. Solutions for this type of equations of heat conductivity in dimension d > 2 were not previously known and represent an ...
V.M. Zhuravlev, V.M. Morozov
doaj   +1 more source

On the mixed problem for hyperbolic partial differential-functional equations of the first order [PDF]

open access: yes, 1999
summary:We consider the mixed problem for the hyperbolic partial differential-functional equation of the first order \[ D_xz(x,y) = f(x,y,z_{(x,y)}, D_yz(x,y)), \] where $z_{(x,y)} \: [-\tau ,0] \times [0,h] \rightarrow \mathbb{R}$ is a function defined ...
Człapiński, Tomasz
core   +1 more source

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