نتایج جستجو برای: material

تعداد نتایج: 364236  

Journal: :energy equipment and systems 2015
mohammad riazat majid baniasadi mohsen mazrouie mehdi tafazoli mahdi moghimi zand

in the present study, the effect of porosity on the cathode microstructure (50:50 wt. % lsm: ysz) of a solid oxide fuel cell (sofc) has been examined. a 3-d finite element method for mixed ionic and electronic conducting cathodes (miec) is presented to study the effects of porosity on cell performance. each microstructure was realized using the monte carlo approach with the isotropic type of gr...

2007

This document gives the implementation details of the numerical model of the central pattern generator presented in the main article (Section 1). Section 2 presents the design characteristics of the salamander robot. Section 3 explains the methods for measuring the kinematics of salamander and robot locomotion. Finally, Section 4 analyzes recent data that show that the limb oscillators intrinsi...

2016
Marcel Penz Sreyan Ghosh

When learning a new skill, video tutorials are often the first choice to get help. For creative domains like carving, this is often not sufficient as the desired expression require reacting on changes in the form constantly. A crucial part of the making process is a close observation of the material. Looking at various domains we have chosen wood carving, to propose new forms of interactions th...

پایان نامه :وزارت بهداشت، درمان و آموزش پزشکی - دانشگاه علوم پزشکی و خدمات بهداشتی درمانی استان کرمانشاه 1371

طی یک بررسی آینده نگر که ازتاریخ 71/5/1 لغایت 71/10/15 انجام شد، 150 بیم بصورت کاملا تصادفی انتخاب شده و بررسی های لازم در مورد آنها صورت گرفت .از 50 بیمار 84 نفرمرد) 56(و 66 مورد) 44(زن بودند و حداکثر موارد ابتلا دربین گروه های سنی 40-60 ساله بود.از تعداد کل بیماران 53 نفر) 35(سابقه مصرف سیگار راذکر می کردند و 42 نفر ازبیماران 28 سابقه خانوادگی پرفشاری شریانی رادرخانواده خودبیان می کردند . روش...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده ادبیات و زبانهای خارجی 1393

the purpose of this study was to find the relationship between critical thinking and self-regulation with reading comprehension of iranian female elementary language learners. the present study is a correlational one having a descriptive design. two questionnaires, critical thinking questionnaire and self-regulation questionnaire which were valid and reliable questionnaires and four reading com...

پایان نامه :دانشگاه تربیت معلم - تبریز - دانشکده علوم 1389

فیلتری باساختارپریودیک سه گانه یک بعدی مطرح شده وروابط پراکندگی در ان بررسی میشود.با انالیز ریاضی می توان باندهای ممنوعه و مجاز طول موجها را با تغییرات زاویه فرودی پیش بینی کرد.با استفاده از روابط پراکندگی و با انتخاب مقادیر مناسب پارامترهای کنترلی میتوان طرح یک فیلتر اپتیکی را داد که می تواند در همه رنجهای طیف الکترومغناطیسی بکار گرفته شود.این مطالعه میتواند برای بهبود کارایی و دقت pbg(photoni...

Journal: :dental research journal 0
vincenzo sollazzo annalisa palmieri luca scapoli marcella martinelli ambra girardi furio pezzetti

background: perioglasâ (pg) is an alloplastic material used for grafting periodontal osseous defects since 1995. in animal models, it has been proven that pg achieves histologically good repair of surgically created defects. in clinical trials, pg was effective as an adjunct to conventional surgery in the treatment of intrabony defects. because the molecular events due to pg that are able to al...

Journal: :journal of applied and computational mechanics 0
theddeus t. akano department of systems engineering, university of lagos, nigeria omotayo. a fakinlede department of systems engineering, university of lagos, nigeria patrick shola olayiwola bells university of technology

composites provide design flexibility because many of them can be moulded into complex shapes.  carbon fibre-reinforced epoxy composites exhibit excellent fatigue tolerance with high specific strength and stiffness. these properties led to their numerous advanced applications ranging from military and civil aircraft structures to consumer products. the modelling of beams undergoing arbitrarily ...

Journal: :journal of english language teaching and learning 2014
rozana shamsabadi saeed ketabi

the development of materials for language teaching has been retraced from different perspectives. for example, some have identified influences of a social view on designing course books and compiling materials for language classes. the purpose of this article is to focus on the specific case of elt material, its design and priorities in the context of iran. this article also offers a detailed a...

Journal: :iranian journal of oil & gas science and technology 2013
hamed rashidi touba hamoule mohammad reza khosravi nikou ahmad shariati

msu-s mesoporous catalyst with [sio2]/[al2o3] ratio of 55 was synthesized using tetrapropylammonium hydroxide (tpaoh) as a structure directing agent and hexadecyltrimethylammonium bromide (ctab) as a surfactant. the catalytic activity of the calcined sample was evaluated for the dehydration of methanol to dimethyl ether (dme) in a vertical fixed bed microreactor at a weight hurly space velocity...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید