نتایج جستجو برای: a w
تعداد نتایج: 13496623 فیلتر نتایج به سال:
This paper seeks to delineate some of the significant modes of philosophical resistance to, and subversion of, British Idealism already operational in Russell’s earliest work. One key tactic employed in An Essay On the Foundations of Geometry (1897) is to reorient the findings of the ‘modern logic’ of Bradley and Bosanquet by employing some ‘transcendental’ or neo-Kantian strategies. Russell th...
Let V and W be two real vector spaces and let &sim be a relation on both V and W. A linear function T : V → W is said to be a linear preserver (respectively strong linear preserver) of &sim if Tx &sim Ty whenever x &sim y (respectively Tx &sim Ty if and only if x &sim y). In this paper we characterize all linear functions T : M_{n,m} → M_{n,k} which preserve or strongly preserve multivariate an...
Co3W2Si intermetallic compound was synthesized by mechanical alloying (MA) of W, Co and Si elemental powder mixtures. The phase composition of the milled products was evaluated by X-ray diffraction (XRD) analysis. Morphological evolutions were characterized by transmission electron microscopy (TEM). The results showed that high energy ball milling performed in the present work led to the format...
We recently examined a case of refractoriness to HIAmatched, ABO-incompatible platelet transfusions. The transfused platelets that were rapidly cleared from the circulation of the recipient expressed an amount of B antigen more than 20 times that expressed by the blood group B platelets that were successfully transfused to the recipient. These observations led us to conduct enzyme-linked immuno...
در این پایاننامه wرا یک کلاس از r-مدولهای چپ خود متعامد در نظر می گیریم و مدولهای جدیدی را با عنوان مدولهای w-گرنشتاین معرفی ومورد مطالعه قرار میدهیم که توسیع مشترکی از مدولهای تصویری(انژکتیو) گرنشتاین و مدولهای v-گرنشتاین می باشند. به طور اخص به مدولهای wp-گرنشتاین و wi -گرنشتاین توجه می کنیم: wp =}c ?r p | -مدول تصویری است r یک p{ wi = {homs (c, e) | - مدول انژکتیو استs یک e} که در آنs ...
Let $mathcal{A}$ be a unital Banach algebra, $mathcal{M}$ be a left $mathcal{A}$-module, and $W$ in $mathcal{Z}(mathcal{A})$ be a left separating point of $mathcal{M}$. We show that if $mathcal{M}$ is a unital left $mathcal{A}$-module and $delta$ is a linear mapping from $mathcal{A}$ into $mathcal{M}$, then the following four conditions are equivalent: (i) $delta$ is a Jordan left de...
the weighted semigroup algebra mb (s, w) is studied via its identification with mb (s) together with a weighted algebra product *w so that (mb (s, w), *) is isometrically isomorphic to (mb (s), *w). this identification enables us to study the relation between regularity and amenability of mb (s, w) and mb (s), and improve some old results from discrete to general case.
reliable estimates of runoff are required as a part of the information sets that help watershed managers make informed decisions on water resources planning and management. this study was carried out in shafaroud watershed located in the north of iran. in order to achieve the best runoff simulation in the study area, first rainfall data of four stations during 1998 to 2011 were collected and co...
Introduction One of the best methods in the diagnosis and control of breast cancer is mammography. The importance of mammography is directly related to its value in the detection of breast cancer in the early stages, which leads to a more effective treatment. The purpose of this article was to calculate the X-ray spectrum in a mammography system with Monte Carlo codes, including MCNPX and MCNP5...
cotio3-clay nano-composites were synthesized via a conventional sol-gel method; the gel was calcinated at 500 - 800°c for 2 hours. the presence of rhombohedra phase of cotio3 in clay matrix was confirmed by xrd, ftir, sem. cobalt titanate-clay nano-composites were prepared with 5-20%(w/w) by sol-gel method. the spectra results were investigated at 20% (w/w) concentration .the optimum condition ...
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