نتایج جستجو برای: quency domain
تعداد نتایج: 405943 فیلتر نتایج به سال:
In this paper, the boundary-based estimation of pressure distribution in the cardiovascular system is investigated using two dimensional flow images. The conventional methods of non-invasive estimation of pressure distribution in the cardiovascular flow domain use the differential form of governing equations. This study evaluates the advantages of using the integral form of the equations in the...
harmonics have become an important issue in modern power systems. the widespread penetration of non-linear loads to emerging power systems has turned power quality analysis into an important operation issue under both steady state and transient conditions. this paper employs an extended harmonic domain (ehd) based framework for dynamic analysis of long term analysis over voltages during the tra...
the stolt (f-k) migration algorithm is a direct (i.e. non-recursive) fourier-domain technique based on a change of variables (or equivalently, a mapping) that converts the input spectrum to the output spectrum. the algorithm is simple and efficient but limited to constant velocity. a v(z)(f-k) migration method, capable of very high accuracy for vertical variations of velocity, can be formulated...
Subject and Purpose. The sporadic radio emissions coming from the Sun in a broad frequency range contain lot of important information concerning solar corona, parameters sources therein, parameter variations resulting active processes on about Sun. These have been reasons for recent launches space missions intended stud- ying its such as Parker Solar Probe (PSP) Orbiter. present work is aimed a...
In this paper, we have used a control volume method to investigate the problem of a fully coupled fluid flow with heat transfer in a rectangular domain with slip wall boundary conditions. We have used this method to solve the governing equations and thereby to compute the convective and diffusive fluxes at the cell faces of the control volumes considered around the grid points of computational ...
objective: quality of life (qol) assessment has been employed increasingly to evaluate outcome among patients with chronic medical conditions. such assessment could be adversely affected by psychiatric disorders, co existing with such a medical condition. method: a cross sectional study of 251 out-patients with diabetes mellitus was done at a nigerian university teaching hospital using the comp...
In this study, a new and efficient approach is presented for numerical solution of Fredholm integro-differential equations (FIDEs) of the second kind on unbounded domain with degenerate kernel based on operational matrices with respect to generalized Laguerre polynomials(GLPs). Properties of these polynomials and operational matrices of integration, differentiation are introduced and are ultili...
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