نتایج جستجو برای: 54o e and 31
تعداد نتایج: 17351779 فیلتر نتایج به سال:
از فرآیند گرمای القائی در تکنولوژی و صنعت در موارد زیادی مانند جوش فلزات، بازپخت، متالورژی ]1[ رشد بلور ]4-2[، و ... استفاده می شود. در این روش ماده فلزی مورد نظر (قطعه کار مانند بوته)، داخل یک پیچه ی القائی قرار می گیرد. سپس با ایجاد یک جریان الکتریکی متناوب فرکانس بالا درپیچه (جریان رانشی)، میدان های الکتریکی و مغناطیسی متناوبی در اطراف پیچه ایجاد می شوند. با نفوذ این میدان ها در ماده فلزی مو...
We briefly discuss the first direct experimental evidence from LEP2 on nonvanishing trilinear couplings among the weak vector bosons. Subsequently we review the improved Born approximation to include radiative corrections. Provided the appropriate high-energy scale is used for the SU(2) gauge-coupling, the improved Born approximation is sufficiently accurate for all practical purposes at LEP2. ...
let g=(v,e) be a graph with vertex set v and edge set e.for two vertices u,v of g ,the closed interval i[u,v] ,consists of u,v and all vertices lying in some u-v geodesic in g.if s is a set of vertices of g then i[s]is the union of all sets i[u,v]for u,v ? s. if i[s]=v(g) , then s is a geodetic set for g.the geodetic number g(g) is the minimum cardinality of geodetic set.the maximum cardinalit...
Top-down tree transducers with "-rules ("tdtt) are a restricted version of extended top-down tree transducers. They are implemented in the framework Tiburon and ful ll some criteria desirable in a machine translation model. However, they compute a class of transformations that is not closed under composition (not even for linear and nondeleting "tdtt). A composition construction that composes "...
در این مطالعه تنوع منطقه ای صفات ریخت شناسی، ویژگی های سن، رشد و تولید مثل ماهی کاراس(carassius gibelio) در حوضه جنوبی دریای خزر از اسفند تا اردیبهشت ماه سال 89-90 مورد بررسی قرار گرفت. بزرگترین نمونه براساس طول و وزن کل در استان گلستان 8/25 سانتیمتر و 02/242 گرم، در استان مازندران 80/24 سانتیمتر و 94/326 گرم، در استان گیلان ، 90/29 سانتیمتر و 12/470 گرم داشت. در سه منطقه، سن برای جنس نر و ماده...
abstract ion selective electrodes (ises) are electrochemical sensors that respond selectivity to the activity of ionic species. an ion-selective electrode is an electrochemical device that uses a thin selective membrane or film as the recognition element, and is an electrochemical half-cell equivalent to other half-cells of the zeroth (inert metal in a redox electrolyte). in common methods o...
In all Jlab hypernuclear electroproduction experiments already performed (E89-009, E94107, E01-011) or approved (E05-015) the K mesons are detected at very small (few degrees) laboratory scattering angels (measured with respect to virtual photon momentum). This region of kaon scattering angles is not covered, unfortunately, by recent photoand electroproduction data on the elementary production ...
postcolonial feminism, also dubbed as third world feminism, is an innovative approach, demonstrating the way women of colonized countries suffer from both native patriarchies and imperial ideology. also due to this double-colonization, postcolonial feminists contend that third world women are subjected to both colonial domination of empire and male domination of patriarchy. while western femini...
for several years, researchers in familiarity of efl teachers with post-method and its role in second and foreign language learners’ productions have pointed out that the opportunity to plan for a task generally develops language learners’ development (ellis, 2005). it is important to mention that the critical varies in language teaching was shown is the disappearances of the concept of method ...
background: traditional cigarette advertising has existed in the us for over 200 years. studies suggest that advertising has an impact on the initiation and maintenance of smoking behaviors. in recent years, electronic cigarettes (e-cigarettes) emerged on the market as an alternative to the traditional tobacco cigarette. the purpose of this study was to describe advertisements in popular us mag...
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