نتایج جستجو برای: z on a cross
تعداد نتایج: 16006686 فیلتر نتایج به سال:
In this paper, we first construct a model for free surface flows that takes into account the air entrainment by a system of four partial differential equations. We derive it by taking averaged values of gas and fluid velocities on the cross surface flow in the Euler equations (incompressible for the fluid and compressible for the gas). The obtained system is conditionally hyperbolic. Then, we p...
with the growth of more humanistic approaches towards teaching foreign languages, more emphasis has been put on learners’ feelings, emotions and individual differences. one of the issues in teaching and learning english as a foreign language is demotivation. the purpose of this study was to investigate the relationship between the components of language learning strategies, optimism, duration o...
Numerical methods are not always convergent especially in higher velocities when shock waves are involved. A comparison analysis is performed to study the supersonic flow over conical bodies of three different cross sections circular, elliptic and squircle (square with rounded corners) shaped using Perturbation techniques to find flow variables analytically. In order to find lift and drag forc...
در این پایان نامه، در حلقه های مشخصی که شامل عناصر خودتوان غیرمرکزی هستند، همومورفیسم ها، اشتقاق ها و ضربگرها را بوسیله ی اعمال آنها روی عناصری که در برخی از شرایط خاص صدق می کنند، مشخص می کنیم. برای مثال، شرطی را در نظر می گیریم که در آن هرگاه $ h $ یک نگاشت جمعی بین حلقه های $ mathcal{a} $ و $ mathcal{b} $ و $ x,y,z in mathcal{a} $ به گونه ای باشند که $ xy=yz=0 $، آنگاه...
فرض کنیم s رده ی تمام توابع نحلیلی و تک ارز به شکل f(z) = z + ς n=٢ nzn روی قرص یکه باز {1>[z], c ∋z:z} و a رده ی همه توابع تحلیلی نرمال شده {z}f در u باشد. در این پایان نامه رده ی تمام توابع تحلیلی به شکل بالا که در شرط صدق می کند را مورد بررسی قرار می دهیم. همچنین شرایطی را روی ?و μ تعیین خواهیم کرد که تضمین کند رده ی توابع بالا ستاره گون است.
the ability of composing a coherent and extended piece of writing in second language is considered as a fundamental factor to convey information and ideas of learners through the academic issues. although learners may achieve a perfect academic writing skill through assigning the l2 tasks in content based instruction, but demonstration of their abilities may be related to their ability in l1 es...
در این تحقیق روش حساس و نوینی جهت تشخیص بیماری آمیبیاز پیشنهاد شده است . اصول آزمایش بر این فرضیه استوار است که receptor های مخصوص آنتی ژن آمیب روی لنفوسیت های حساس شده میتوانند با این آنتی ژن ترکیب شوند. قبل از انجام آزمایش آنتی ژن آمیب را با آنزیم بتاگالاکتوزیداز conjugate میکنیم (a-z) . این آنزیم و همچنین ترکیب a-z در مجاورت substrate مخصوص خود (fdbg) fluorescein-d-b-galactopyronoside ایجاد ...
Background: Dual-energy X-ray Absorptiometry (DXA) is considered the gold standard for non-invasive measurement of bone mass. T-scores and Z-scores are used to present the results of bone mass. The present study was designed to evaluate the discordance between T-scores and Z-scores calculated at a same level and its relation with age, gender and body mass index (BMI) in a representative sampl...
The effects of friction stir processing (FSP) on the microstructure and mechanical properties of aluminum powder metallurgy (PM) parts was investigated. PM parts were then subjected to FSP at advancing speeds (v) of 40-200 mm/min and tool rotational speeds (ω) of 800-1600 rpm. Microhardness (HV) and tensile tests at room temperature were used to evaluate the mechanical properties of the frictio...
hedging is a multi-purpose rhetorical strategy which is usually used in scientific arguments to secure ratification of claims, reduce the risk of negation, avoid conflict, manage disagreement and leave room for the audience to assess presented information. hedges are frequently used in research articles to mitigate the findings of research endeavors. the present research aims to investigate the...
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