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Evaluating the Impacts of Universal Two-Child Policy on Beijing's Population 期刊论文
JOURNAL OF SYSTEMS SCIENCE & COMPLEXITY, 2020, 页码: 18
作者:  Liu, Qing;  Liu, Xiuli
收藏  |  浏览/下载:162/0  |  提交时间:2020/06/30
Age structure  Beijing  cohort-component  population projection  universal two-child policy  
The distribution of stars around the Milky Way's central black hole III. Comparison with simulations 期刊论文
ASTRONOMY & ASTROPHYSICS, 2018, 卷号: 609, 页码: 6
作者:  Baumgardt, H.;  Amaro-Seoane, P.;  Schodel, R.
收藏  |  浏览/下载:201/0  |  提交时间:2018/07/30
methods: numerical  Hertzsprung-Russell and C-M diagrams  stars: kinematics and dynamics  Galaxy: centre  Galaxy: nucleus  
Data sphering: Some properties and applications 期刊论文
ANNALS OF THE INSTITUTE OF STATISTICAL MATHEMATICS, 1998, 卷号: 50, 期号: 2, 页码: 223-240
作者:  Zhang, J
收藏  |  浏览/下载:109/0  |  提交时间:2018/07/30
sphering  dispersion matrix  invariance  asymptotic  projection pursuit