نتایج جستجو برای: diffusion

تعداد نتایج: 163312  

Journal: :bulletin of the iranian mathematical society 2014
jun liu

the stochastic reaction diffusion systems may suffer sudden shocks‎, ‎in order to explain this phenomena‎, ‎we use markovian jumps to model stochastic reaction diffusion systems‎. ‎in this paper‎, ‎we are interested in almost sure exponential stability of stochastic reaction diffusion systems with markovian jumps‎. ‎under some reasonable conditions‎, ‎we show that the trivial solution of stocha...

2007
Henrik Wanntorp HENRIK WANNTORP

This paper studies monotonicity and convexity properties of option prices in jump-diffusion models. In such models it is possible for a monotone contract function to give rise to an option price which is non-monotone in the underlying asset. This is connected to the fact that the no-crossing property, which holds for one-dimensional diffusions, may fail in the presence of jumps. We present a si...

2011
Yuanfang Guo Oscar C. Au Lu Fang Ketan Tang

In this paper, we propose a new halftone watermarking method named Data Hiding by Dual Conjugate Error Diffusion (DHDCED) based on Data Hiding by Conjugate Error Diffusion (DHCED). Unlike DHCED, The proposed method will embed a binary secret pattern into two or more error diffused halftone images by modifying each of them. When the two halftone images are overlaid, the secret pattern will be re...

An analytical solution of the equation describing diffusion of intrinsic point defects in semiconductor crystals has been obtained for a one-dimensional finite-length domain with the Robin-type boundary conditions. The distributions of point defects for different migration lengths of defects have been calculated. The exact analytical solution was used to verify the approximate numerical solutio...

The stochastic reaction diffusion systems may suffer sudden shocks‎, ‎in order to explain this phenomena‎, ‎we use Markovian jumps to model stochastic reaction diffusion systems‎. ‎In this paper‎, ‎we are interested in almost sure exponential stability of stochastic reaction diffusion systems with Markovian jumps‎. ‎Under some reasonable conditions‎, ‎we show that the trivial solution of stocha...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شاهد - دانشکده دندانپزشکی 1394

مقدمه و هدف: نقش باکتری ها در ایجاد آسیب های پیرامون ریشه به اثبات رسیده است، باکتری های موجود در کانال ریشه دندان های شیری عامل اصلی بروز عفونت های اندودونتیک در کانال ریشه این دندان ها می باشند. انتروکوکوس فکالیس از غالب ترین و گاهی تنها باکتری جدا شده از کانال های درمان شده اندودنتیک بوده و از جمله مهمترین عوامل شکست در درمان های اندودنتیک می باشد. به کار بردن سیلرهایی که کلونیزاسیون و چسبن...

Journal: :pollution 2015
alireza noorpoor h. r. rahman

today, the cement industry is one of the major air polluting industries in the world. hence, in this study, owing to the importance and role of contaminants from the plant, an appraisal of the emission contributions in addition to other factors have been discussed. there are several reasons behind the importance of modeling air pollutants. first, the assessment of standards for air pollution, a...

Journal: :journal of basic research in medical sciences 0
reza mohammadi radiology technology department, faculty of allied medical sciences, ghods square, tehran, iran fariborz faeghi radiology technology department, faculty of allied medical sciences, ghods square, tehran, iran ayoob rostamzadeh cellular and molecular research center, anatomical sciences department, faculty of medicine, kurdistan university of medical sciences, sanandaj, iran. jalal jalal shokouhi iranian society of radiology, tehran. iran doman arefan medical radiation department, shahid beheshti university of medical sciences, tehran, iran

introduction: to examine the hypothesis that diffusion weighted imaging (dwi) in lumbosacral region could reveal sciatic nerve course swelling that lead to lower extremity pain. the aim of present article was to find and evaluate the diffusion weighted coefficients (b-values) for scrutinizing sciatic nerve tract changes in lumbosacral region. materials and methods: lumbar area was imaged in 30 ...

Journal: :international journal of molecular and cellular medicine 0
fariba asgharpour paramedical faculty, babol university of medical scienes, babol, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی بابل (babol university of medical sciences) mehdi pouramir cellular and molecular biology research center (cmbrc), babol university of medical scienes, babol, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی بابل (babol university of medical sciences) asieh khalilpour paramedical faculty, babol university of medical scienes, babol, iran.سازمان اصلی تایید شده: دانشگاه علوم پزشکی بابل (babol university of medical sciences) sobgol asgharpour alamdari bureau of education, rasht-region 2, rasht, iran. mehrasa rezaie faculty of veterinary medicine university of urmia, urmia, iran.سازمان اصلی تایید شده: دانشگاه ارومیه (urmia university)

plants with hypoglycemic properties are important in the treatment of diabetes. one of the mechanisms in reducing blood glucose is preventing the digestive absorption of glucose. the aim of this study was to evaluate the antioxidant properties of some traditional medicinal plants collected from different regions of iran and their effects on glucose diffusion decrease. the amounts of phenolic co...

Journal: :international journal of environmental research 0

water quality aspect with regard to dissolved oxygen was studied for a 24 kilometer stretch of malaprabha river in karnataka state, india. main objective of the research was to simulate the predicted dissolved oxygen depletion due to the waste load allocation in the river with the ambient observed values of dissolved oxygen, and to ascertain the application of mathematical modeling for predicti...

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