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نشئت "Nature" في عام 1869، ويعتبرها العلماء والباحثون دوريةً عالميةً أسبوعية رائدة في مجال العلوم. إنّ موقع "Nature" المُحَدَّث بانتظام سيسمحن للمستخدمين العرب في جميع أنحاء العالم بالولوج بلغتهم إلى أخبار وتعليقات "Nature ...
Unencapsulated two-dimensional perovskite devices retain over 60 per cent of their efficiency for over 2,250 hours under constant, standard (AM1.5G) illumination, and exhibit greater tolerance to ...
Nature Chemistry offers a unique mix of news and reviews alongside top-quality research papers. Published monthly, in print and online, the journal reflects the entire spectrum of chemistry, pure ...
A protocol using large-scale training of graph networks enables high-throughput discovery of novel stable structures and led to the identification of 2.2 million crystal structures, of which ...
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تعدين الحديد: الحديد هو أحد أكثر العناصر المكونة للصخور ويشكل حوالي خمسة بالمئة من القشرة الأرضية، يأتي الحديد في المرتبة الرابعة من حيث وفرته بعد الأكسجين ثم الألمنيوم ويتلوه السيليكون ...
Nat Chem Biol) ISSN 1552-4469 ISSN 1552-4450 (print) Nature Chemical Biology is an international journal publishing research and commentary at the interface of chemistry, biology and allied ...
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In this study, the incorporation of glass fibers in concrete bridge decks has been studied for improving its mechanical properties as well as energy absorption …
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nature for authors For Authors The sections below provide essential information for authors and we recommend that you take the time to read them before submitting a contribution to...
تقرير شامل عن الحديد. الاثنين 30 يوليو 2012 12:53:49 مساءً المشاهدة (100330) يمكن القول بأن الحديد هو أهم عنصر فلزي عرفته الإنسانية فهو الأكثر استخداما وهو أكبر الفلزات وأكثرها استخداما في صناعاته ...
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Scientific Reports has a 2-year impact factor of 4.6 (2022), and is the 5th most-cited journal in the world, with more than 738,000 citations in 2022*. *2023 Journal Citation Reports® Science ...
Nature Chemistry offers a unique mix of news and reviews alongside top-quality research papers. Published monthly, in print and online, the journal reflects the entire spectrum of …
A deep-learning architecture is a multilayer stack of simple modules, all (or most) of which are subject to learning, and many of which compute non-linear input–output mappings. Each module in ...
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Quantum supremacy is demonstrated using a programmable superconducting processor known as Sycamore, taking approximately 200 seconds to sample one instance of a quantum circuit a million times ...
صناعة تعدين الفحم: تشمل صناعة تعدين الفحم إنتاج كلّ من الفحم الحجري، والفحم الصلب، والفحم الأسمر، ويشمل هذا القسم من التعدين على محطات الصناعة والتحضير، ولكنّه لا يشمل إنتاج قوالب الفحم أو ...
Shanghai, 25 November 2015. Nature Publishing Group (NPG), part of Springer Nature, today releases Turning Point: Chinese Science in Transition, a White Paper which takes the pulse of China's scientific research at a critical time in its development.It is the first report of its kind to be undertaken in China by a global publisher, drawing on quantitative and …