نتایج جستجو برای: multiple diffraction and inhomogeneous medium
تعداد نتایج: 16957240 فیلتر نتایج به سال:
muhammad ibn muhammad ibn numan, known as "shaykh mufid," one of the great imamiye theologians and jurists in the fourth and early fifth century , had comprehensive mastery of both rational and traditional topics and exerted his influence upon both his contemporary and future scholors. he is considered to be one of the top imamiye scholars who spent his lifetime teaching, learning and authorin...
In this paper, a new formulation of the Helmholtz equation for sound propagation in a moving inhomogeneous medium in cylindrical coordinates is derived. Based on this formulation, a novel three-dimensional parabolic equation is constructed. This parabolic equation can be used to model sound propagation in an inhomogeneous arbitrary moving medium. The method is used here to simulate three-dimens...
current studies in second language (l2) learning have revealed the positive role of corrective feedback (cf) in both oral and written forms in different language features. the present study was an attempt to investigate the effect of both direct and indirect written corrective feedback (wcf) on the use of grammatical collocations in l2 writing. the study also sought to examine whether the effec...
2014 Metal-dielectric inhomogeneous media exhibit contrasted physical properties according to the nature of the metallic inclusion : noble or transition. A comparison between Au-MgO and Pt-Al2O3 thin films (prepared by sputtering), based on their optical, electrical and structural properties, is presented. The optical properties are analysed using two effective medium theories : Maxwell Garnett...
The normal-mode expansion technique has been used to solve the uncoupled radiative heat transfer problem for an absorbing, emitting, isotropically scattering, nonisothermal, gray medium confined between specularly reflecting, gray parallel boundaries held at uniform but different temperatures. Solutions are given for the intensity of radiation, the incident radiation and the net radiation heat ...
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