Results 31 to 40 of about 15,045 (53)
Kongjian kexue xuebao基于ENVISAT-1/GOMOS(Global Ozone Monitoring by Occultation of Stars)和TIMED/SABER (Sounding of the Atmosphere using Broadband Emission Radiometry)卫星的臭氧廓线数据结合模式HAMMONIA (Hamburg Model of the Neutral and Ionized Atmosphere)对热带低纬度地区(20°S－20°N)中间层(60～110 km高度 ...
柳 丹 +6 more
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Discovering Jewish Studies Collections in Academic Libraries: A Practical Guide
, 2014 The U.S. colleges and universities offering non-sectarian educational programs in Jewish Studies rely on the support of their academic libraries for research materials and library services.
Taler, Izabella
core
Kongjian kexue xuebao针对平流层飞艇刚柔一体大型复杂结构系统设计与分析, 开展了附有集中质量的飞艇囊体材料动力特性仿真分析研究, 将刚度大、质量相对集中的结构零部件简化为集中质量, 飞艇囊体简化为双向拉伸的十字形囊体材料试样, 分析预张力大小、集中质量的质量和尺寸对囊体材料试样的动力特性影响. 结果表明, 试样的固有频率随着预张力增大而增大, 随着集中质量的质量增大而减小, 随着集中质量与试样连接的边长增加而增大; 试样的基频与集中质量的高度无关, 但第2, 3阶频率随着集中质量的高度增加而减小 ...
程 靖淞, 王 生, 聂 营, 宋 林
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Journal of Astronomy and Space SciencesA method for resident space object detection in video stream processing using a set of matched filters has been proposed. Matched filters are constructed based on the connection between the Fourier spectrum shape of the difference frame and the ...
Vasilina Baranova +3 more
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Interpolation and Synthesis of Sparse Samples in Exoplanet Atmospheric Modeling
The Planetary Science JournalThis paper highlights methods from geostatistics that are relevant to the interpretation, intercomparison, and synthesis of atmospheric model data, with a specific application to exoplanet atmospheric modeling.
Jacob Haqq-Misra +3 more
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OGLE-IV Period–Luminosity Relation of the LMC: An Analysis Using Mean and Median Magnitudes
The Astronomical JournalThe Period–Luminosity (PL) relation for Cepheid variable stars in the LMC is crucial for distance measurements in astronomy. This study analyzes the impact of using the median rather than the mean of the PL relation’s slope and zero-point.
Jaime Muñoz +5 more
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The Planetary Science JournalTitan is unique among the icy satellites in that it has a thick atmosphere, stable surficial bodies of liquid, and a precipitation system that promotes interactions between the two.
Anna E. Engle +11 more
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Evidence for Surprising Heavy Nitrogen Isotopic Enrichment in Comet 46P/Wirtanen’s Hydrogen Cyanide
The Planetary Science Journal46P/Wirtanen is a Jupiter-family comet, probably originating from the solar system’s Kuiper Belt, that now resides on a 5.4 yr elliptical orbit. During its 2018 apparition, comet 46P passed unusually close to the Earth (within 0.08 au), presenting an ...
M. A. Cordiner +11 more
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Asteroid Period Solutions from Combined Dense and Sparse Photometry
The Astronomical JournalDeriving high-quality light curves for asteroids and other periodic sources from survey data is challenging owing to many factors, including the sparsely sampled observational record and diurnal aliasing, which is a signature imparted into the periodic ...
Michael Gowanlock +4 more
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Rapid Impact Crater Relaxation Caused by an Insulating Methane Clathrate Crust on Titan
The Planetary Science JournalTitan’s impact craters are hundreds of meters shallower than expected, compared to similar-sized craters on Ganymede. Only 90 crater candidates have been identified, the majority of which have low certainty of an impact origin.
Lauren R. Schurmeier +5 more
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