نتایج جستجو برای: dimensional model

تعداد نتایج: 2408583  

Maryam Ghorbani, Mohammad Reza Khorsand Mohsen Masihi,

The performance of water flooding can be investigated by using either detail numerical modeling or simulation, or simply through the analytical Buckley-Leverett (BL) model. The Buckley-Leverett analytical technique can be applied to one-dimensional homogeneous systems. In this paper, the impact of heterogeneity on water flooding performance and fractional flow curve is investigated. First, a ba...

By the past two decades IPMCs have been intensively studied because of their special capabilities for actuation and sensing.This paper presents a theoretical physics based model for analyzing the behavior of IPMC sensors in fluid environments. The mechanical vibration of the IPMC strip is described by the classical Euler–Bernoulli beam theory. The model also takes in to account the physical pro...

Journal: :آب و توسعه پایدار 0
هاجر طاهری خدیجه براتی محمد شایان نژاد

human activities in the fields of agriculture, municipal and industry introduce significant amounts of nutrients and organic materials into the rivers and streams resulting in their contamination. computer models such as qual2kw are used extensively for water quality management of rivers and streams. the qual2kw model is a one dimensional, non-uniform, steady water quality model, which has been...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد گرمسار - پژوهشکده علوم انسانی و اجتماعی 1391

abstract the present study was conducted to investigate the effect of using model essays on the development of writing proficiency of iranian pre-intermediate efl learners. to fulfill the purpose of the study, 55 pre- intermediate learners of parsa language institute were chosen by means of administering proficiency test. based on the results of the pretest, two matched groups, one as the expe...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی امیرکبیر(پلی تکنیک تهران) - دانشکده عمران و محیط زیست 1386

ازنظربیولوژیکی، مردابهای ساحلی در زمره غنی ترین نواحی روی کره زمین می باشند. در این نواحی آب و خشکی و آب شور و شیرین با هم در تماس هستند. موجودات زیستی زیادی در مردابها جمع می شوند و اختلاط زندگی جانوری و گیاهی در آنجا وجود دارد. همچنین مردابها به عنوان منابعی برای آب باران و رواناب نقش مهمی در کاهش اثر سیل ر کنترل فرسایش و کیفیت آب دارند. از دیگر فواید مردابها فواید محیط زیستی و تفریحی می باشن...

A two-dimensional model of Al, Si ordering in alkali feldspar is formulated and used to calcul~tea ccurately the configurational entropy for the model. For this purpose, a new method called Independent Basic Unit or IBU is introduced. To compare the results with the exact values, this method is applied to the onedimensional model of albite. The results given by IBU are found to be accurate ...

رشیدپور, مصطفی, سلیمانی, کریم, شاهدی, کاکا, کریمی, ولی الله,

Flooding due to the failure of drainage systems is a serious problem for many urban watershed of Iran. This paper shows how flooding in urban drainage systems can be simulated by one- dimensional hydrodynamic modeling incorporating the interaction between (I) the buried pipe systems (II) the streets with open channel flow. The values of the NS, RMSE, and %BIAS statistics were also calculated to a...

M. Sefid and A. A. Rostami,

Micro-Channel Heat Sink is a heat exchanger which is used to control the temperature of electronic devices with high heat flux. A comprehensive thermal model for the micro-channels should include three dimensional conduction analysis in the solid body together with three dimensional developing fluid flow as well as heat transfer analyses in the fluid section. This paper reports on a research ...

Journal: :Journal of Object Technology 2009
Gonzalo Génova María Cruz Valiente Mónica Marrero

In this paper we try to clarify the confusions that lie around the widely used terms “analysis model” and “design model” in software engineering. In our experience, these confusions are the root of some difficulties that practitioners encounter in system modeling, and sometimes lead to bad engineering practices. Our approach consists of placing the duality of analysis and design within a three-...

M. Sefid and A. A. Rostami,

Micro-Channel Heat Sink is a heat exchanger which is used to control the temperature of electronic devices with high heat flux. A comprehensive thermal model for the micro-channels should include three dimensional conduction analysis in the solid body together with three dimensional developing fluid flow as well as heat transfer analyses in the fluid section. This paper reports on a research ...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید