搜索结果: 1-15 共查到“知识库 理学 COSMIC”相关记录208条 . 查询时间(0.044 秒)
Occurrences, abundances, and compositional variations of cosmic symplectites in the Acfer 094 ungrouped carbonaceous chondrite
cosmic symplectite magnetite Fe,Ni-sulfides Acfer 094 carbonaceous chondrite
2017/4/10
We describe the petrographic occurrences, abundances, and compositional variations of symplectically intergrown
Fe,Ni-sulfides and 17,18O-rich magnetite (D17O ~ 90‰), named cosmic symplectites (COS; ...
EUSO: using high energy cosmic rays and neutrinos as messengers from the unknown universe
fluorescence cosmic rays neutrinos extensive air showers
2015/9/16
Exploiting the earth atmosphere as a giant detector for the incoming extraterrestrial fl ux of high energy cosmic rays
and cosmic neutrinos, the mission «EUSO-Extreme Universe Space Observatory&...
Wei-xiong Huang Explain Cosmic Mysteries-Black Holes Do Not Exist
stellar mass black holes
2015/5/28
1. Celestial body center temperature is proportional to cube root of stellar mass. 2. When stellar temperature exceeds boiling point of all elements, stellar density is inversely proportional to cube ...
Testing cosmic censorship with black hole collisions
Quality of the hole the cosmological constant total quality extreme limit
2014/12/23
There exists an upper limit on the mass of black holes when the cosmological constant Λ is positive. We study the collision of two black holes whose total mass exceeds this limit. Our investigation is...
It is shown that topologically stable cosmic strings can, in fact, appear to end or to break, even in theories without monopoles. This can occur whenever the spatial topology of the universe is nontri...
Ly alpha EMISSION FROM COSMIC STRUCTURE. I. FLUORESCENCE
temporal light curves quasar radiation
2014/12/22
We present predictions for the fluorescent Lyα emission signature arising from photoionized, optically thick structures in smoothed particle hydrodynamic cosmological simulations of a ΛCDM universe us...
The Assembly of Galaxies Over Cosmic Time
cosmology: observations galaxies: evolution galaxies: formation galaxies: high-redshift galaxies: stellar content galaxies: structure
2014/12/9
To Understand how galaxies were assembled across the cosmic time remains one of the most outstanding questions in astronomy. The core of this question is how today's Hubble Sequence, namely the differ...
基于GPS和COSMIC数据分析汶川地震TEC和NmF2扰动
汶川地震 TEC NmF2 同震响应
2014/9/26
使用相关方法和welch法计算功率谱密度研究汶川地震前后GPS TEC在时域和频域上的变化，并进一步分析NmF2空间分布变化.得出主要结论， 震前5月9日开始TEC平常具有良好的相关性被打破，24 h全日波、12 h半日波成分功率谱密度幅度值变化明显.5月12日至6月11日NmF2变化幅度明显增大.研究结果显示，TEC和NmF2时空分布变化存在电离层震前扰动和同震响应， 并且TEC震后的异常变化相...
基于COSMIC卫星观测数据的平流层重力波的全球分布特征研究
重力波 平流层 COSMIC
2014/12/19
本文利用2007年1月至2012年12月的COSMIC卫星温度剖线,从中提取了垂直波长在3~10 km的重力波扰动信息,进而分析了全球平流层大气重力波的分布特征.赤道地区低平流层重力波表现出明显的准两年变化,这种变化与风场的准两年变化具有明显的相关性,向下发展速度约为1 km/月;赤道地区高平流层(35 km以上区域)的重力波活动则存在明显的半年变化.中高纬度重力波活动主要表现为冬季强夏季弱.在南...
中国区域电离层垂测仪探测参量与COSMIC掩星反演结果比较研究
COSMIC 垂测仪 临界频率 峰值高度
2014/12/19
利用漠河站、左岭站、富克站垂测仪数据和COSMIC反演的电离层资料,分析比较了太阳活动高年两种探测手段获取的电离层特征参量(NmF2、hmF2)的相关性.结果表明,两种方式获取的电离层对应特征参量相关性较高,且NmF2的相关性好于hmF2,同时相关性与纬度和季节有关.在地磁中纬度地区对应参量相关性较好,而在地磁低纬度受北驼峰控制区域相关性降低;在电离层赤道异常区域,春秋季、夏季对应特征参量相关性好...
本文利用2009年1月—2011年12月共3年的COSMIC大气掩星观测数据与SABER/TIMED探测数据开展15~60 km大气温度数据的比较分析研究,计算COSMIC与SABER/TIMED探测温度的绝对偏差(TSABER-TCOSMIC),并统计其平均温度偏差和标准偏差,分析温度偏差随高度、纬度和季节的分布特征,为COSMIC大气掩星与SABER/TIMED探测数据的应用提供更多的参考依据...
利用COSMIC掩星弯曲角数据分析中国区域对流层顶结构变化
对流层顶 COSMIC GPS无线电掩星 弯曲角
2013/11/4
对流层顶是地球大气的一个最基本的结构特征,对流层与平流层通过对流层顶交换气团、水汽、微量气体、能量等.对流层顶结构变化与气候变化密切相连.本文采用掩星弯曲角自然对数协方差变换法确定对流层顶,利用气象、电离层与气候星座观测系统(Constellation Observing System for Meteorology, Ionosphere and Climate,COSMIC)2007年1月至2...
Cosmology today is confronted with several seemingly insoluble puzzles and strange, inexplicable coincidences. But a careful re-examination of the Cosmological principle and the Weyl postulate, founda...
Assessing the Feasibility of Cosmic-Ray Acceleration by Magnetic Turbulence at the Galactic Center
Feasibility Cosmic-Ray Acceleration Magnetic Turbulence the Galactic Center
2012/2/23
The presence of relativistic particles at the center of our galaxy is evidenced by the diffuse TeV emission detected from the inner $\sim$$2^\circ$ of the Galaxy. Although it is not yet entirely clear...
Fermi-LAT Observations of the Diffuse Gamma-Ray Emission: Implications for Cosmic Rays and the Interstellar Medium
Fermi-LAT Observations Diffuse Gamma-Ray Emission Implications Cosmic Rays the Interstellar Medium
2012/2/23
The gamma-ray sky >100 MeV is dominated by the diffuse emissions from interactions of cosmic rays with the interstellar gas and radiation fields of the Milky Way. Observations of these diffuse emissio...