نتایج جستجو برای: pdf model
تعداد نتایج: 2123815 فیلتر نتایج به سال:
Although knowing the time of the occurrence of the earthquakes is vital and helpful, unfortunately it is still unpredictable. By the way there is an urgent need to find a method to foresee this catastrophic event. There are a lot of methods for forecasting the time of earthquake occurrence. Another method for predicting that is to know probability density function of time interval between earth...
سیستم های جدید مخابراتی از مدولاسیون های با بازده طیفی زیاد که papr زیادی دارند، استفاده می کنند. در چنین سیستم هایی عملکرد خطی تقویت کننده توان نقش مهمی در کارایی سیستم دارد. با توجه به اینکه تقویت کننده های توان به صورت ذاتی غیر خطی هستند، لازم است از روش های خطی سازی مانند پیش اعوجاج دیجیتال برای خطی سازی سیستم استفاده شود. در این رساله روشی برای محاسبه تابع یک پیش اعوجاج دهنده دی...
BACKGROUND Recurrent infections in peritoneal dialysis (PD) patients may alter the abdominal wall resulting in an impairment of its dialysis capacity. In this study we investigated both in vitro and in vivo the effects of mesothelial exposure to dialysis fluids on the migration of neutrophils and their capacity to clear a bacterial infection. METHODS First, we evaluated neutrophil migration i...
One of the most important issues to address in turbulent combustion calculations is the intense nonlinear interaction between fluid mixing and finite-rate chemistry. In combustion processes which are characterized by fast chemistry, use of the flamelet model (Peter, 1984) or conditional moment closure (CMC) (Bilger, 1993) based on a conserved scalar is known to be quite accurate in making quali...
We present a general framework to treat the evolution of one-point probability distribution function (PDF) for cosmic density δ and velocity-divergence fields θ. In particular, we derive an evolution equation for the one-point PDFs and consider the stochastic nature associated with these quantities. Under the local approximation that the evolution of cosmic fluid fields can be characterized by ...
although there exist advanced models which predict beach profile for natural beaches, the behavior of the beaches in front of seawalls still suffers from the lack of appropriate theoretical models and sufficient measured data. in this paper, following the results obtained from the measurements, a beach profile evolution model is developed, using the measured probability distribution of the near...
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