Results 21 to 30 of about 129,430 (267)

Wave propagation analysis in transversely isotropic piezoelastic medium based on nonlocal strain gradient theory

Vietnam Journal of Mechanics, 2023
The purpose of this research is to study the propagation of surface waves in transversely isotropic piezoelastic medium based on nonlocal strain gradient theory. A characteristics equation for the existence of surface waves is discussed.
Trinh Thi Thanh Hue, Do Xuan Tung
doaj   +1 more source

Dispersive Properties for Discrete Schrödinger Equations [PDF]

Journal of Fourier Analysis and Applications, 2011
In this paper we prove dispersive estimates for the system formed by two coupled discrete Schrödinger equations. We obtain estimates for the resolvent of the discrete operator and prove that it satisfies the limiting absorption principle. The decay of the solutions is proved by using classical and some new results on oscillatory integrals.
Ignat, L.I., Stan, D.
openaire   +4 more sources

An Indirect Method for an Alternate Perspective to Dispersion Diagrams of Magnetoinductive Waveguides

IEEE Open Journal of Antennas and Propagation, 2022
The dispersion equation of magnetoinductive waveguides (MIWs) is traditionally solved directly for the propagation constant ( $\gamma $ ) to obtain diagrams for the attenuation ( $\alpha $ ) and phase ( $\beta $ ) constants vs.
Vigyanshu Mishra, Asimina Kiourti
doaj   +1 more source

Approximations of random dispersal operators/equations by nonlocal dispersal operators/equations

Journal of Differential Equations, 2015
28 ...
Shen, Wenxian, Xie, Xiaoxia
openaire   +2 more sources

Dispersion Estimates for Spherical Schrödinger Equations [PDF]

Annales Henri Poincaré, 2016
Derivamos una estimación de dispersión para operadores de Schr\"odinger radiales perturbados unidimensionales. También derivamos varias estimaciones nuevas para soluciones de la ecuación diferencial subyacente e investigamos el comportamiento de la función de Jost cerca del borde del espectro continuo.
Aleksey Kostenko, Gerald Teschl, Julio H. Toloza   +2 more
openaire   +4 more sources

The Effect of Viscosity and Heterogeneity on Propagation of G–Type Waves

International Journal of Applied Mathematics and Computer Science, 2017
Earthquakes yield motions of massive rock layers accompanied by vibrations which travel in waves. This paper analyses the possibility of G-type wave propagation along the plane surface at the interface of two different media which is assumed to be ...
Gupta Shishir, Smita
doaj   +1 more source

Propagation of SH waves in an regular non homogeneous monoclinic crustal layer lying over a non-homogeneous semi-infinite medium

International Journal of Applied Mechanics and Engineering, 2016
The present paper discusses the dispersion equation for SH waves in a non-homogeneous monoclinic layer over a semi infinite isotropic medium. The wave velocity equation has been obtained.
M. Sethi, A. Sharma
doaj   +1 more source

Using Hydraulic Parameters to Estimate Longitudinal Dispersion Coefficient in Open Channel

Tikrit Journal of Engineering Sciences, 2009
A comparative analysis of previous theoretical and empirical equations is applied to evaluate their behavior in predicting dispersion coefficient in open channel.
Karim R. Gubashi
doaj   +1 more source

Analytic dispersion solver of cold plasma waves with computer algebra SymPy [PDF]

AIP Advances
We present computer algebra of the polynomial dispersion equation for the cold plasma waves (neglecting the displacement current) using the Python library SymPy.
Y. Narita, U. Motschmann, T. Hada
doaj   +1 more source

Reflection of P1-wave incident obliquely at the free surface of a fluid-saturated half-space: a comprehensive study via the model of soil mechanics

Frontiers in Physics
IntroductionElastic wave propagation in fluid-saturated porous media is of great significance in various fields. Based on the soil mechanics model of a two-phase medium, the reflection problem of an obliquely incident plane P1-wave at the free surface is
Bo Zhang, Lijun Qiu, Lijun Qiu
doaj   +1 more source