نتایج جستجو برای: wave analysis
تعداد نتایج: 2999360 فیلتر نتایج به سال:
a modified f-expansion method to find the exact traveling wave solutions of two-component nonlinear partial differential equations (nlpdes) is discussed. we use this method to construct many new solutions to the nonlinear whitham-broer-kaup system (1+1)-dimensional. the solutions obtained include jacobi elliptic periodic wave solutions which exactly degenerate to the soliton solutions, triangu...
purpose: blast-induced traumatic brain injury (btbi) is one of the causes of death or permanent invalidity which can occur unexpectedly in both military and civilian populations. this study set out to conduct a combined eulerian-lagrangian computational analysis of the interaction between a single planar blast wave and a human head in order to assess the extent of intracranial shock wav...
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...
Three waves of behavior therapy with different objectives and methods have been published that in the formation of each of them, several factors have had impact. This study look at these factors and attention the current challenges of the third wave of behavioral therapy, points to the emergence of a fourth wave of behavioral therapy. Including the challenges of the third wave behavioral therap...
the north atlantic oscillation (nao) is one of the most prominent modes of low-frequency variability over the atlantic basin in the northern hemisphere. in the past decades, the impact of nao has attracted increasing scientific interest because the nao exerts an important impact on the regional climate and weather in the north atlantic region and adjacent continents. of particular interest is t...
در این پایان نامه سعی کرده ایم برای یک سری از ساختارهای خطوط انتقالی که عموما با روش های عددی یا با استفاده از نرم افزارهای full wave حل می شوند، مدلی ساده و در عین حال دقیق ارایه دهیم که می تواند رفتار مدل فیزیکی را از دید پایانه ها به خوبی پیش بینی کند. این ساختار خطوط انتقال میکرواستریپی می شوندکه در بردهای pcb چند لایه به صورت عمود بر هم قرار می گیرند. خطوط مایکرواستریپ عمود برهم به دلیل ...
On the basis of the continuity equation and the Bernoulli equation in the steady form, a differential equation is developed to evaluate the successive water levels within compartments of an upright perforated wave absorber. Then the initial and boundary conditions are introduced and the differential equation is solved as an initial value problem. Finally the reflection coefficient from the wave...
گرافن ابررسانای طبیعی نیست اما افرادی بودند که لایه های ابررسانایی بوسیله لایه نشانی یک ابررسانا برروی یک لایه گرافن بر پایه گرافن تولید کرده اند ، به طوری که علاوه بر جفت شدگی معمول s-wave دیگر جفت شدگی های غیر معمول نیز با روش مجاورت یک ابرسانای غیر معمول نظیر ابررساناهای دما بالا قابل دسترسی خواهد بود. در نتیجه توجهات خاصی به تاثیر جفت شدگی های غیر معمول در انتقالات کوانتومی در اتصالات ابر ر...
The most of wave spectrum analyzes in Persian Gulf were based on the existing field measurements, but the precision and applicability of the determined spectrum parameters were dependent on number of field wave stations, duration of field data and the spatial distribution of field wave stations. In this research, it is attempted to re-analysis again the wave spectrum parameters presented by pre...
The present investigation deals with the propagation of waves in a micropolar transversely isotropic layer. Secular equations for symmetric and skew-symmetric modes of wave propagation in completely separate terms are derived. The amplitudes of displacements and microrotation were also obtained. Finally, the numerical solution was carried out for aluminium epoxy material and the dispersion curv...
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