نتایج جستجو برای: wave one

تعداد نتایج: 2182616  

میرباقری, یاسر, نحوی, حسن, پرویزیان, جمشید,

 Grid dispersion is one of the criteria of validating the finite element method (FEM) in simulating acoustic or elastic wave propagation. The difficulty usually arisen when using this method for simulation of wave propagation problems, roots in the discontinuous field which causes the magnitude and the direction of the wave speed vector, to vary from one element to the adjacent one. To sol...

Journal: مهندسی دریا 2005
Ali Nakhaee, Aliasghar Golshani, Majid Jandaghi Alaee, Soheila Taebi, Vahid Chegini,

The significant effect of waves on coastal and marine activities urges the precise identification of wave characteristics using field measurements, theoretical studies, physical modeling or numerical simulations. In order to study thoroughly the wave climate in the Caspian Sea, a wave modeling and hindcast project was performed by Iranian National Center for Oceanography. In this study, one of ...

A complete series of potential functions for solving the wave equations in an almost transversely isotropic media is presented. The potential functions are reduced to only one potential function particularly for axisymmetric wave propagation problems. The potential functions presented in this paper can be reduced to Lekhnitskii-Hu-Nowacki solution for elastostatics problems.

Journal: :مجله دانشگاه علوم پزشکی کرمانشاه 0
abdolrasool moloudi associate professor of indiovascular cardiology, kermanshah university of medical sciences. maryam kalhori bsc in nursing. zahra hoseini bsc in nursing. daem rawshani msc in biostatistics, kermanshah university of medical sciences

introduction : coronary artery disease is one of the most dangerous health problems in developed and undeveloped countries. annually one million patients admitted in coronary care units in u.s.a due to ami and about 59 million people suffered from atherosclerosis. in europe 54% of c.c.u admissions is due to non q wave mi and 46% due to q wave mi. unfortunately there is no distinct statistic al ...

In this paper, first the limitations of the ray-based method and the one-way wave-field extrapolation migration (WEM) in imaging steeply dipping structures are discussed by some examples. Then a new method of the reverse time migration (RTM), used in imaging such complex structures is presented. The proposed method uses a new wave-field extrapolator called the Leapfrog-Rapid Expansion Method (L...

Journal: :The Journal of the Acoustical Society of America 1992

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