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  ground
    Solution and Error Analysis for Time Synchronization among Meteorological Satellite Ground Stations at Different Regions
    异气象卫星面站的时间同步方案及误差分析
短句来源
    the orbit models, the calculation methods of sub satellite and the coverage judgement which take into account the J 2 perturbations are given first, and then an iterating methods of designing satellite orbit with repeat ground trace is proposed.
    首先给出考虑J2摄动项时近轨道卫星的轨道模型、星下点计算方法和覆盖判断准则,在此基础上给出一种近回归轨道的迭代设计方法。
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    The miniature star simulator introduced in the paper is a testing equipment simulating the sky on the ground, in this way the functional testing for star map recognition algorithm of a star sensor can be carried out and the simulated star map can be given at real-time.
    本文介绍的小型星模拟器是在面上模拟天空,以便对星敏感器的星图识别算法进行功能测试的检测设备,可实时动态给出模拟星图。
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    The correlation analyses are made between the yearly-mean values of the solar constant and the critical frequency of the F_2 layers,the Stratosphere temperature, the ground temperature, and the variation of the length of a day for the period of 1979~1987. The results show that the correlation coefficieots are more than +0.8, except the correlation coefficient between the solar constant and the ground temperature is -o.
    对1979~1987年间太阳常数与近空间环境参数(电离层临频,平流层温度和面温度)和球自转的日长变化△LOD的年平均作了相关分析。 除了面温度与太阳常数的相关系数为-0.7外,其余参数与它的相关系数均在+0.8以上。
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    We first review the methods of VLBI maser observation and the research progress. The future VLBI observation of masers using space VLBI is then discussed in somedetail. The ground VLBI observations of masers currently under way are also mentionein support of the space VLBI observations.
    在本文中较全面述了天体脉泽源的VLBI观测方法,简单提及VLBI观测研究的新进展,着重述评空间VLBI用于脉泽的观测,并提及了面VLBI的一些预备观测情况。
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  earth
    ORBIT STUDIES FOR THE SPECIAL NEAR—EARTH ASTEROID 1989 FC
    特殊近小行星1989 FC的轨道研究
短句来源
    ASTEROIDS AND COMETS—THE RELATIONSHIP BETWEEN NEAR—EARTH ASTEROIDS AND MAIN—BELT ASTEROIDS AND CONETS
    小行星与彗星——近小行星、主带小行星和彗星之间相互关系探讨
短句来源
    We have also calculated the atmospheric density distributions of the Earth, Venus and Mars.
    本文利用RBF公式,计算了球、金星、火星等类行星际的大气密度分布及火星水汽的寿命。
    The unusual asteroid 1989 FC made a record of close approach to the earth by a distance of only 0.0046AU on 1989 3 23.0 ET, to which people paid close attention with great interest.
    阿波罗型小行星1989 FC于1989年3月23日(ET)几乎掠而过,与球近达0.0046AU,创小行星近纪录,引起人们极大的关注与兴趣。
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    Based on the equation of state of Nandan iron meteorite and the PREM model of the eaath, it is calculated that the material density at the boundary between inner core and outer core of the earth is 12.83-13.41 g/cm3 and the temperature is 5440-5680 K;
    从南丹铁陨石的物态方程和球的PREM模型出发,求得内外核交界面处的物质密度为12.83—13.419/cm~3,温度为5440—5680K;
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  “地”译为未确定词的双语例句
    CORONAL HOLES,146 MHz EMISSIONS AND GEOMAGNETIC STORMS
    冕洞、146MHz太阳辐射与磁暴
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    2840 MHz Solar Radio Observations During 1988Solar-Terrestrial Spacial Joint-Observation at Beijing Astronomical Observatory (BAO)
    北天文台1988年日联测中2840兆周太阳射电观测(英文)
短句来源
    THE COSMIC RAY FORBUSH DECREASES DURING THE COMBINED OBSERVATIONS IN 1988
    1988年日大事件四次联测期间宇宙线强度变化(英文)
短句来源
    TEC BEHAVIOR IN BEIJING DURING THE 1988 JOINT OBSERVATION
    1988年日联测期间北京区TEC行为(英文)
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    On the Prospect for the Research of Plasma Physics in Solar-Terrestrial Space
    关于日空间等离子体物理研究的前景
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  land
Our study indicates that the model can be applied to study the interaction between land surface processes and atmospheric boundary layers over various underlying surfaces and their regional climate effects.
      
Regularities of wind-erosion of different land-use types in Yongding River sandy land, Beijing
      
The threshold wind velocity of a number of variables was studied in four different land-use types: farm land, forestland, wild grassland and a flood plain in the Yongding River sandy land in Beijing.
      
The following conclusions were drawn: 1) The order of decreasing threshold of wind speed for sand displacement and surface roughness were forestland, wild grassland, farm land, sparse wild grassland and flood plain.
      
At a height of 0-20 cm, the height increased while the sediment discharge percent of sand flux decreased; there were significant differences in the sand flow formation under different land-use types.
      
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  ground
We develop methods that give rise to natural monomial bases for such rings over their ground fields and explicitly determine precisely which monomials are zero in the ring of coinvariants.
      
Direct current magnetic susceptibility measurement in the 2-300 K temperature range supports a high-spin ground state.
      
Meanwhile, the measurement of water vapor in daytime has been taken, and the profiles of water vapor mixing ratio at ground level have been detected.
      
Low velocity target detection based on time-frequency image for high frequency ground wave radar
      
The Doppler spectral broadening resulted from non-stationary movement of target and radio-frequency interference will decrease the veracity of target detection by high frequency ground wave (HFGW) radar.
      
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  earth
Exploitation of rare earth catalysts in polymer syntheses
      
The studies over forty years on rare earth catalysts in polymer syntheses of diene, alkyne, alkylene oxide, thiirane, carbon dioxide copolymerization, lactide, caprolactone, cyclic carbonate and so forth in China have been reviewed.
      
Synthesis and characterization of rare earth complexes with Phthalaldehyde-lysine Schiff base
      
The spectra indicate that the energy transfer takes place from the triplet excited state of MLCT (metal-to-ligand charge transfer) state for Sr2CeO4 (sensitizer) to the rare earth ions (activator).
      
Biological effect of rare-earth lanthanum nitrate on the growth of Escherichia coli B was studied using the calorimetric method.
      
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