نتایج جستجو برای: aspect ratio

تعداد نتایج: 588058  

Journal: :Microsystem Technologies 2004

Journal: :Physical review letters 2013
Biagio Nigro Claudio Grimaldi Peter Ryser Avik P Chatterjee Paul van der Schoot

The connectedness percolation threshold (η(c)) and critical coordination number (Z(c)) of systems of penetrable spherocylinders characterized by a length polydispersity are studied by way of Monte Carlo simulations for several aspect ratio distributions. We find that (i) η(c) is a nearly universal function of the weight-averaged aspect ratio, with an approximate inverse dependence that extends ...

Journal: :international journal of nano dimension 0
a. taheri school of mechanical engineering, mazandaran university of science and technology, babol, iran. e. aboukazempour amiri department of mechanical engineering, iran university of science and technology, narmak, tehran, iran. a. ramiar school of mechanical engineering, babol university of technology, p. o. box 484, babol, iran. a. a. ranjbar school of mechanical engineering, babol university of technology, p. o. box 484, babol, iran. m. rahimi-esbo school of mechanical engineering, babol university of technology, p. o. box 484, babol, iran.

research in convective heat transfer using suspensions of nanometer-sized solid particles in base liquids started only over the past decade. recent investigations on nanofluid, as such suspensions are often called, indicate that the suspended nanoparticles remarkably change the transport properties and heat transfer characteristics of the suspension. bending walls can also improve heat transfer...

Journal: :international journal of nano dimension 0
a. pourasghar young researchers and elite club, islamic azad university, central tehran branch, tehran, iran. s. kamarian young researchers and elite club, islamic azad university, kermanshah branch, kermanshah, iran.

effective elastic properties for carbon nanotube reinforced composites are obtained through a variety of micromechanics techniques. an embedded carbon nanotube  in  a  polymer  matrix  and  its surrounding  interphase  is  replaced with an equivalent fiber for  predicting  the  mechanical  properties of  the  carbon  nanotube/polymer composite. the effects of an interphase layer between the nan...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده مهندسی 1393

روتور در توربین های بادی محور عمودی بصورت عمودی قرار می گیرد. مهم ترین برتری این نوع از توربین های بادی آن است که نیازی به تنظیم، جهت قرار گیری نسبت به جهت وزش باد ندارند. در این مطالعه به بررسی اثر نسبت منظری به عنوان پارامتری موثر بر روی عملکرد آیرودینامیکی توربین بادی محور عمودی داریوس با تیغه های مستقیم پرداخته می شود. نسبت منظری در این پروژه بصورت نسبت ارتفاع پره به قطر روتور توربین تعریف ...

Journal: :Physical review letters 2004
Denis Funfschilling Guenter Ahlers

We used the time correlation of shadowgraph images to determine the angle Theta of the horizontal component of the plume velocity above (below) the center of the bottom (top) plate of a cylindrical Rayleigh-Bénard cell of aspect ratio Gamma identical with D/L=1 (D is the diameter and L approximately 87 mm is the height) in the Rayleigh-number range 7 x 10(7)</=R</=3 x 10(9) for a Prandtl number...

Journal: :Vision Research 1998
David Whitaker Paul V McGraw

Combined manipulation of blur, line length and contrast reveal two distinct processes involved in curvature detection. When line length is small relative to blur, thresholds are almost directly proportional to blur and independent of line length. When line length is large relative to blur thresholds are directly proportional to line length and independent of blur. The aspect ratio (line length/...

Journal: :Physical review letters 2007
Félicien Schopfer François Mallet Dominique Mailly Christophe Texier Gilles Montambaux Christopher Bäuerle Laurent Saminadayar

We report on magnetoconductance measurements of metallic networks of various sizes ranging from 10 to 10(6) plaquettes, with an anisotropic aspect ratio. Both Altshuler-Aronov-Spivak h/2e periodic oscillations and Aharonov-Bohm h/e periodic oscillations are observed for all networks. For large samples, the amplitude of both oscillations results from the incoherent superposition of contributions...

2011
Daniel Gantenbein Joachim Schoelkopf Peter Matthews Patrick A.C. Gane

Article history: Received 26 July 2010 Received in revised form 21 December 2010 Accepted 6 January 2011 Available online xxxx

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