نتایج جستجو برای: 64 for ceres
تعداد نتایج: 10378087 فیلتر نتایج به سال:
The manuscript describes the methodology employed to derive the current angular distribution models (ADMs) for the CERES instruments, i.e. the radiance-to-flux conversion algorithms for CERES thermal and solar measurements. This paper is necessary to document the new CERES product Ed4SSF, which improves the retrieval of cloud parameters and TOA flux with respect to previous versions. The enhanc...
Surface net radiation plays an important role in land–atmosphere interactions. The net radiation can be retrieved from satellite radiative products, yet its accuracy needs comprehensive assessment. This study evaluates monthly surface net radiation generated from the Clouds and the Earth’s Radiant Energy System (CERES) and the Surface Radiation Budget project (SRB) products, respectively, with ...
اهمیت آب در کشاورزی در کنار رشد روزافزون جمعیت و ضرورت تأمین غذای مورد نیاز، استفادة بهینه از منابع آب را ضرورت میبخشد. مدلAquaCrop ، ارائهشده از سوی سازمان خواربار جهانی، از مدلهای شبیهساز رشد گیاهی است که سعی میکند با استفاده از کاهش تعداد دادة ورودی سهولت کاربری این نرمافزار را افزایش دهد. در این مطالعه، علاوه بر واسنجی و صحتسنجی مدل AquaCrop برای گیاه ذرت در منطقة کرج، با استفاده از...
MOTIVATION There is accumulating evidence that the chromatin environment of transcription factor (TF) binding sites in promoter regions has a critical influence on their regulatory potential. Recent studies have mapped TF binding sites and nucleosome positions throughout the yeast genome; however, there is a lack of computation tools to integrate these data types. RESULTS We have developed th...
The Clouds and the Earth’s Radiant Energy System (CERES) generates one of the few global satellite radiation products. The CERES ARM Validation Experiment (CAVE) has been providing long-term in situ observations for the validation of the CERES products. However, the number of these sites is low and their distribution is globally sparse, and particularly the surface net radiation product has not...
Observations and models of Ceres suggest that its evolution was shaped by interactions between liquid water and silicate rock. Hydrothermal processes in a heated core require both fractured rock and liquid. Using a new core cracking model coupled to a thermal evolution code, we find volumes of fractured rock always large enough for significant interaction to occur. Therefore, liquid persistence...
On 6 March 2015, Dawn arrived at Ceres to find a dark, desiccated surface punctuated by small, bright areas. Parts of Ceres' surface are heavily cratered, but the largest expected craters are absent. Ceres appears gravitationally relaxed at only the longest wavelengths, implying a mechanically strong lithosphere with a weaker deep interior. Ceres' dry exterior displays hydroxylated silicates, i...
Introduction: The dwarf planet Ceres has a diameter of ~950 km, and it is the largest object in the asteroid belt. Ceres has a density of ~2040-2250 kg m, and a dark non-icy surface with signs of hydrated minerals [1-5]. The low density implies that Ceres contains a significant fraction of voids and/or low-density compounds. These compounds could be presented by hydrated and OH-bearing minerals...
Cut-elimination is the most prominent form of proof transformation in logic. The elimination of cuts in formal proofs corresponds to the removal of intermediate statements (lemmas) in mathematical proofs. The cut-elimination method CERES (cut-elimination by resolution) works by constructing a set of clauses from a proof with cuts. Any resolution refutation of this set then serves as a skeleton ...
Aims. We study the physical characteristics (shape, dimensions, spin axis direction, albedo maps, mineralogy) of the dwarf-planet Ceres based on high-angular resolution near-infrared observations. Methods. We analyze adaptive optics J/H/K imaging observations of Ceres performed at Keck II Observatory in September 2002 with an equivalent spatial resolution of ∼50 km. The spectral behavior of the...
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