نتایج جستجو برای: wave celerity

تعداد نتایج: 218203  

The acoustic wave velocity depends on elasticity and density at most materials, but because of anisotropy and especially piezoelectric coupling effect, the acoustic wave propagation at piezoelectric based crystalloacoustic materials, is an applied and challenging problem. In this paper, using modified Christoffel's equation based on group velocity concept, the effect of anisotropy and piezoelec...

A. BISWAS, H. TRIKI

In this paper, the coupled dispersive (2+1)-dimensional long wave equation is studied. The traveling wave hypothesis yields complexiton solutions. Subsequently, the wave equation is studied with power law nonlinearity where the ansatz method is applied to yield solitary wave solutions. The constraint conditions for the existence of solitons naturally fall out of the derivation of the soliton so...

ژورنال: مهندسی دریا 2008
تائبی, سهیلا, چگینی, فاطمه, چگینی, وحید,

In this article, the accuracy of empirical and numerical methods in prediction of wind wave characteristics in AmirAbad and Bushehr Ports have been studied, evaluated and compared. First, the wave characteristics have been calculated using Babolsar and Bushehr synoptic stations and employing empirical methods including SMB, SPM and CEM. Moreover the errors of empirical methods have been determi...

Journal: :computational methods for differential equations 0
ahmet bekir eskisehir osmangazi university, art-science faculty, department of mathematics-computer ozkan guner dumlupınar university

in this paper, exp-function and (g′/g)expansion methods are presented to derive traveling wave solutions for a class of nonlinear space-time fractional differential equations. as a results, some new exact traveling wave solutions are obtained.

ژورنال: مهندسی دریا 2006
شفیعی فر, مهدی, صدرالدینی, عباس,

Monopile platforms are rather slim structures which are sensitive to wave loadings and the natural period of them are within the range of sea waves’ periods. Therefore, suitable dynamic analysis and wave modeling for these platforms is necessary. There are two methods for analyzing such flexible structures under wave loading, i.e., deterministic and random methods. In deterministic method...

Journal: مهندسی دریا 2010
Amir Etemad-Shahidi, Mohammad Saeed Najafi,

Wave diffraction is a very important phenomenon in marine engineering and several models have been developed for its simulation. The new version of SWAN, a third generation spectral model, includes an approximation to wave diffraction. The approximation is based on the mild-slope equation for refraction and diffraction, omitting phase information. The objective this paper is to evaluate the per...

Journal: :the journal of tehran university heart center 0
mohammad assadian rad heshmat cardiovascular medical center, guilan university of medical sciences, rasht, iran. zahra emkanjoo heshmat cardiovascular medical center, guilan university of medical sciences, rasht, iran. hassan moladoust heshmat cardiovascular medical center, guilan university of medical sciences, rasht, iran.

t-wave oversensing occurs when the counter starts giving dual beeps for every cardiac cycle instead of one. this usually happens when the monitoring lead displays a tall t wave, which is also sharp. r wave sensing algorithms of the devices do not sense t wave because the slow rate of the t wave is much less than that of the r wave. but the slow rate of t waves may change with time and also beca...

Journal: :Journal of Crystal Growth 2023

This paper presents an experimental validation of in situ ultrasound technique for tracking the solid–liquid interface during directional solidification photovoltaic silicon. Ultrasound bursts are introduced from top into melt via tip a carbon glass waveguide directly plunged liquid. Several runs have been conducted using same thus demonstrating its reusability, mechanical resilience and approp...

Journal: :Gobierno y gestión pública 2021

The objective of this research is to verify if through the management public policy it will be possible comply in a timely manner with processes child support courts peace judicial districts country. For its development, doctrine was analyzed and field work conducted surveys directed judges Superior Court Justice North Lima, due good practices that district has been carrying out because obtain...

Fossil Fuels are always considered as environmental pollutants. On the other hand, the political and economic situations highly affect the price of these fuels. Offshore wind and wave, as renewable energy sources, represent the better alternatives for electricity generation. Therefore, it is necessary that wind speeds effectively be estimated due to the absence of field measurements of the wind...

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