نتایج جستجو برای: طبقهبندی jel o01
تعداد نتایج: 27695 فیلتر نتایج به سال:
Context. Observations with the Hinode spectro-polarimeter have revealed strong horizontal internetwork magnetic fields in the quiet solar photosphere. Aims. We aim at interpreting the observations by means of results from numerical simulations. Methods. Radiative MHD simulations of dynamo action by near-surface convection are analyzed with respect to the relation between vertical and horizontal...
در این پژوهش تغییرات خط ساحلی جنوب دریای مازندران حد فاصل شهرستان بندرانزلی تا دهانه سد سفیدرود به کمک تصاویر ماهوارهای و با هدف مقایسه تکنیکهای سنجش از دور طبقهبندی سری etm+ و tm پیکسل پایه و شئگرا انجام پذیرفت. در این پژوهش از 6 تصویر سنجنده های ماهواره های لندست از سال 1988 تا سال 2012 استفاده شد. نتایج حاصل از ادغام تصاویر، نشان داد که روش موجک، برتری قابل توجهی نسبت به سایر روشها دارد....
When parallel applications are run in large-scale distributed environments, such as grids, peer-to-peer (P2P) systems, and clouds, the set of resources used can change dynamically as machines crash, reservations end, and new resources become available. It is vital for applications to respond to these changes. Therefore, it is necessary to keep track of the available resources—a problem which is...
This paper describes a study concerning the interaction of oxygen with clean Ge(O01)2 x 1 surfaces in ultrahigh vacuum at 300 K. Surface conductance measurements, differential ellipsometry in the photon energy range of 1.5-4 eV and Auger electron spectroscopy have been used to monitor this solid-gas reaction. We observed in the joint density of states. as derived from ellipsometry. a peak at ab...
Functional A and B alleles are distinguished at two critical sites in exon 7 of the human ABO blood group gene. The most frequent nonfunctional O alleles have one-base deletion in exon 6 producing a frameshift, and it has the A type signature in two critical sites in exon 7. Previous studies indicated that B and O alleles were derived from A allele in human lineage. In this study, we conducted ...
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