نتایج جستجو برای: Wave propagation

تعداد نتایج: 306870  

2017
Annette Caenen Mathieu Pernot Ingvild Kinn Ekroll Darya Shcherbakova Luc Mertens Abigail Swillens Patrick Segers

Plane wave imaging in Shear Wave Elastography (SWE) captures shear wave propagation in real-time at ultrafast frame rates. To assess the capability of this technique in accurately visualizing the underlying shear wave mechanics, this work presents a multiphysics modeling approach providing access to the true biomechanical wave propagation behind the virtual image. This methodology was applied t...

Journal: :Ultrasonics sonochemistry 2016
Hakan Dogan Viktor Popov

We investigate the acoustic wave propagation in bubbly liquid inside a pilot sonochemical reactor which aims to produce antibacterial medical textile fabrics by coating the textile with ZnO or CuO nanoparticles. Computational models on acoustic propagation are developed in order to aid the design procedures. The acoustic pressure wave propagation in the sonoreactor is simulated by solving the H...

2004
LOUIS FISHMAN

The exact, well-posed, one-way reformulation of Helmholtz-type wave equations and the generalized Bremmer coupling series are applied to the two-way, scalar, multidimensional Helmholtz equation of mathematical physics. These two constructions provide complementary ways of incorporating one-way wave equation modeling into two-way wave propagation problems. The mathematical framework, for the exp...

2013
Xiangjun Xing Yongli Yu Shuwei Li Xiaohong Huang

Spin-wave devices hold great promise to be used in future information processing. Manipulation of spin-wave propagation inside the submicrometer waveguides is at the core of promoting the practical application of these devices. Just as in today's silicon-based chips, bending of the building blocks cannot be avoided in real spin-wave circuits. Here, we examine spin-wave transport in bended magno...

2011
D. Dhital J. R. Lee H. J. Shin

This study proposes a portable long distance laser ultrasonic propagation imaging (LUPI) system with associated damage visualization algorithms based on anomalous wave propagation imaging (AWPI) methods with adjacent wave subtraction, reference wave subtraction, reference image subtraction, and the variable time window amplitude mapping (VTWAM) for a robust SHM solution.

2015
Banu Şahin Yıldız Alparslan Şahin Nazire Başkurt Aladağ Gülgün Arslan Hakan Kaptanoğulları İbrahim Akın Mustafa Yıldız

OBJECTIVE The effects of acute hemodialysis session on pulse wave velocity are conflicting. The aim of the current study was to assess the acute effects of ultrafiltration on the aortic mechanical properties using carotid-femoral (aortic) pulse wave velocity and pulse propagation time. METHODS A total of 26 (12 women, 14 men) consecutive patients on maintenance hemodialysis (mean dialysis dur...

2012
J. Takada

Wireless technology continues to experience rapid growth and development. With the ever increasing demand for wireless services and applications, more advanced tools are necessary to ensure the performance of these wireless systems. One of the most important tools for system development and radio planning are the radio propagation channel models. These models allow system designers and radio pl...

Journal: :Journal of mathematical biology 2002
Arnaud Tonnelier

We have considered infinite systems of nonlinear ODEs on the one-dimensional integer lattice which describes the activity in an excitatorily coupled network of excitable cells. For an ideal nonlinearity, we calculated the speed of propagation of an activity and derived the condition for its existence. We also studied the existence and stability of the traveling wave solution and gave, in the si...

2010
Steve Elgar Britt Raubenheimer

The primary objective was to develop field-verified models for the evolution of surfacegravity waves propagating over a muddy seafloor, allowing more skillful predictions of wave fields on continental shelves, and enabling the estimation of characteristics of the seafloor from wave observations. The approach was to investigate empirical and theoretical expressions for mud-induced damping by com...

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