نتایج جستجو برای: mass and volume

تعداد نتایج: 16922297  

Journal: :transport phenomena in nano and micro scales 2016
n. kishan c. kalyani m. chenna krishna reddy

the problem of steady magnetohydrodynamic boundary layer flow of an electrically conducting nanofluid due to an exponentially permeable stretching sheet with heat source/sink in presence of thermal radiation is numerically investigated. the effect of transverse brownian motion and thermophoresis on heat transfer and nano particle volume fraction considered. the governing partial differential eq...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه مراغه - دانشکده علوم پایه 1390

در این پایان نامه ابتدا در مورد توابع تک ارز و خواص هندسی آنها و همچنین رابطه ئ این خواص هندسی با شرایط معادل خواص تحلیلی را مطالعه می کنیم. سپس زیر کلاسهای k وs^* (?) که شامل توابع نزدیک به محدب در دیسک واحد u است را تعریف می کنیم وبه کمک خواص پیروی و مشتق توابع تحلیلی خواص شمولیت، برآورد ضریب وقضایای پوششی وچند خاصیت دیگر را در مورد زیر کلاس k_s (?,a,b) مورد بحث وبررسی قرار می دهیم. کارهای ا...

Journal: :transport phenomena in nano and micro scales 2014
a. fattahi m. alizadeh

double-diffusive mixed convection in a lid-driven square enclosure filled with al2o3-water is numerically investigated. two-dimensional nonlinear governing equations are discretized using the control volume method and hybrid scheme. the equations are solved using simpler algorithm. the results are displayed in the form of streamlines, isotherms, and iso-concentrations when the richardson number...

Journal: :iranian journal of medical sciences 0
marzieh farimani sanoee department of obstetrics and gynecology, fatemieh hospital, hamedan, iran nosrat neghab department of obstetrics and gynecology, fatemieh hospital, hamedan, iran soghra rabiee department of obstetrics and gynecology, fatemieh hospital, hamedan, iran iraj amiri the center for molecular medicine research, hamedan university of medical sciences, hamedan, iran

background: it is well known that there is a close relationship between elevated androgen plasma levels and the ultrasound findings of stromal hypertrophy in polycystic ovary syndrome (pcos). the objective of this study was to investigate the effects metformin on the hyperandrogenism and ovarian volume in pcos. methods: the study is an unrandomized clinical trial with before–after design. twent...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده علوم 1388

abstract sensitive and precise voltammetric methods for the determination of trace amounts of furaldehydes, mainly as furfural (f) and 5-hydroxymethyl-2-furaldehyde (hmf), in waste waters and other matrices is described. determination of total furaldehyde at < ?g g-1 levels in alkaline buffered aqueous media was individually investigated. by the use of ordinary swv and adsorptive square wave ...

Journal: :مرتع و آبخیزداری 0
مجید آجورلو استادیار گروه مرتع و آبخیزداری، دانشکدة منابع طبیعی، دانشگاه زابل محبوبه ابراهیمیان دانشجوی دکتری آبخیزداری، دانشکدة جنگل داری، دانشگاه پوترا، مالزی رمضانی عبدالله دانشیار دانشکدة مطالعات محیط زیست، دانشگاه پوترا، مالزی

root morphological and distribution responses of signal grass (brachiaria decumbens) to long-term cattle grazing were examined in a tropical pasture in malaysia. the treatments were no grazing by cattle and grazing at a moderate stocking density (2.7 animal unit/ha) under rotational grazing for 33 years. the method consists of taking soil core using a soil corer to a depth of 30 cm and extracti...

A. Fattahi M. Alizadeh

Double-diffusive mixed convection in a lid-driven square enclosure filled with Al2O3-water is numerically investigated. Two-dimensional nonlinear governing equations are discretized using the control volume method and hybrid scheme. The equations are solved using SIMPLER algorithm. The results are displayed in the form of streamlines, isotherms, and iso-concentrations when the Richardson number...

Journal: :Electronic Journal of Statistics 2018

پایان نامه :وزارت علوم، تحقیقات و فناوری - پژوهشگاه دانشهای بنیادی (مرکز تحقیقات فیزیک نظری و 1387

we show that when both sources ( lepton flavor violation sources and cp-violating phases) are present, the electric dipole moment of the electron, $d_e$, receives a contribution from the phase of the trilinear $a$-term of staus, $phi_{a_ au}$. for $phi_{a_ au}=pi/2$, the value of $d_e$, depending on the ratios of the lfv mass elements, can range between zero and three orders of magnitude a...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز 0

a semi-empirical mathematical model for predicting physical part of ignition delay period in the combustion of direct - injection diesel engines with swirl is developed . this model based on a single droplet evaporation model . the governing equations , namely , equations of droplet motion , heat and mass transfer were solved simultaneously using a rung-kutta step by step unmerical method . the...

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