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  astronomer
The ablation catheter was placed next to the electrodes showing the earliest pulmonary vein activation utilizing a novel navigation system (ASTRONOMER?, EPT).
      
The ASTRONOMER? navigation system allows precise steering of the ablation catheter to areas identified as left atrial to PV conduction pathways and reduces the radiation exposure.
      
Peter Kolb (1675-1726), a German astronomer and mathematician, was an unlikely candidate to write the book that became the most well-known source of the Cape of Good Hope and the Khoikhoi in the eighteenth century.
      
This pattern is patently taken over from the positional astronomer, after whose grand analytical tool (analytical mechanics) q.m.
      
The astronomer can do nothing but observe his objects, while the physicist can interfere with his in many ways, and does so elaborately.
      
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  astronomers
At present, space radio astronomers and engineers study the prospects of design of the second-generation ground-space interferometers for astrophysical research with the microsecond angular resolution of sources.
      
The recent discovery of extrasolar planets and planetary systems has raised many new research problems for astronomers.
      
Its main goal to create and develop the RVO, intended to provide Russian astronomers with direct and effective access to worldwide astronomical data resources.
      
As a multi-science platform, the telescope will provide treasures to astronomers, as well as bring prosperity to other research, e.g.
      
Events also stretch away into the near future as anticipated in our plans and foretold by weather forecasters, and into the distant future as predicted by climatologists, geologists, and astronomers.
      
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In the first half of this paper,the author describes an overview and main observing facilities of National Radio Astronomy Observatory (NRAO), a typical observational research centre for radio astronomy.In the second half, a distribution of observing programs using the main telescopes of NRAO which has been open to the astronomers over the world since the 1980s is summarized. And the trends of the present observational studies in radio astronomy is analysed.

本文前半部介绍了一个在国际上有影响的射电天文实测研究基地——美国国家射电天文台(NRA-O)的概况和主要实测装备,阐明了它在射电天文领域的地位及其代表性。后半部介绍了它向世界各国天文学家开放的主要射电望远镜八十年代以来的观测课题分布,并对当前射电天文实测研究的动向作了一个简单的剖析。

Many astronomers need some catalogs to choose source candidates,do identification and research.At present,some large data centers aboard provide such services as catalogue query,multiple source query (i.e.cross-identification of small sample) and visualization.However,with the increase of observational data and the arrival of the whole wavelength astronomical era,the present services can not meet some requirements from astronomers.We review the services of data centers abroad,put new problems and raise a set...

Many astronomers need some catalogs to choose source candidates,do identification and research.At present,some large data centers aboard provide such services as catalogue query,multiple source query (i.e.cross-identification of small sample) and visualization.However,with the increase of observational data and the arrival of the whole wavelength astronomical era,the present services can not meet some requirements from astronomers.We review the services of data centers abroad,put new problems and raise a set of solutions. The realization of the cross-identification of two random catalogues and huge catalogues,the classification of the result of cross-identification,and free choice of parameters so on are all emphasized.

许多天文学家需要星表来选源、证认和研究。目前国外有一些大的数据中心提供了星表查询、多源查询(即小样本交叉证认)、可视化等功能。但是随着大数据量及全波段天文时代的到来,这些服务已经越来越不能满足天文学家的需求。在详细分析了国外数据中心的服务后,提出了新的问题,并给出一套解决方案。着重讨论了任意两个星表的交叉证认和大数据量星表的交叉证认的实现,以及交叉证认结果的分类和参数的自由选择等方面的课题。

 
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