نتایج جستجو برای: migration of elements

تعداد نتایج: 21192170  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز - دانشکده مهندسی مکانیک 1394

راحتی سفر (ride comfort) در خودرو ها بستگی به احساس سرنشیان داخل وسیله نقلیه نسبت به ارتعاشات وارد شده بر خودرو دارد. ارتعاشات بدنه خودرو ناشی از عوامل گوناگونی مثل ناهمواری های سطح جاده، نیروهای آیرودینامیکی، ارتعاشات موتور و نابالانسی چرخ ها می تواند باشد[1].عموما ناهمواری های سطح جاده منبع اصلی ارتعاشات ایجاد شده بر روی وسیله نقلیه بوده و ضربه های اتفاقی ناشی از ناهمواری های جاده، خودرو را د...

Rural-urban migration has been identified as one of the most important components of livelihood strategy and poverty reduction in many rural communities. The aim of this study was to conduct a factor analysis of indicators determining rural-urban migration among ranchers in Ardabil province's watersheds. The research method was descriptive-analytical and the data collection tools were questionn...

Journal: :دراسات الادب المعاصر 0
ناهدة فوزی مریم پیکانبور سعد جابریانی

the fivefold elements of elegy which has come from classical arabic criticism has special place in hoboubi,s poem.hoboubi, like his other contemporaries, insisted on using these elements and applied their rules and regulations on the basis of the former critics,s ideas in his poem well and nicely. he believed that the elements of the ancient poem are valuable heritage in literature which is rem...

Journal: :iranian journal of medical sciences 0
majid reza farrokhi gh tavallaee

ventriculoperitoneal (vp) shunt is one of the most common pediatric neurosurgical procedures. it has various complications that may have serious consequences such as shunt dysfunction, and unusual migration. although, migration of shunt catheter to bladder, heart, umbilicus, rectum, pulmonary artery, and stomach has been reported, migration to vagina is a rare one. in this report we present a 1...

Journal: :فیزیک زمین و فضا 0
مریم خاکی فیروز کارشناس ارشد پردازش داده های لرزه ای، شرکت کدکم حمیدرضا سیاهکوهی دانشیار، گروه فیزیک زمین، مؤسسة ژئوفیزیک دانشگاه تهران

the stolt (f-k) migration algorithm is a direct (i.e. non-recursive) fourier-domain technique based on a change of variables (or equivalently, a mapping) that converts the input spectrum to the output spectrum. the algorithm is simple and efficient but limited to constant velocity. a v(z)(f-k) migration method, capable of very high accuracy for vertical variations of velocity, can be formulated...

Extended abstract Introduction: Rural-urban migration is one of the common features of rural areas in developing countries including Iran. Metropolises as places of concentration of population, facilities, and services, have always been the main centers of absorbing rural-urban migrants. Migration is one of the main solutions of the poor and low-income rural households to increase income and a...

Journal: :پژوهش های روستایی 0
عیسی ابراهیم زاده حمیدرضا وارثی محمود اکبری

in this paper we tried to analyze the relationship between migration, informal settlement, and unemployment in ahvaz as the regional metropolis of khuzestan state. unemployment and migration interaction effect with each other. because on the one hand unequal distribution facilities and services leads to unemployment and job for people, the other hand, mass unemployment in section of the workfor...

1999
K. J. Slough

A study of the e€ects of grid discretization on the migration of DNAPL within a discrete-fracture network embedded in a porous rock matrix is presented. It is shown that an insuciently ®ne discretization of the fracture elements can lead to an overprediction of the volume of DNAPL that continues to migrate vertically at the intersection of a vertical and horizontal fracture. Uniform discretiza...

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