共查询到13条相似文献,搜索用时 93 毫秒
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介绍了2003年度天文学科科学基金申请、资助的基本情况,并对一些结果进行了分析。 相似文献
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介绍了2005年度天文学科科学基金申请、资助的基本情况,并对其结果进行了分析。 相似文献
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介绍了2002年度天文学科科学基金申请、资助的基本情况,并对某些结果进行了分析。 相似文献
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大家公认,刘慈欣先生的科幻巨著《三体》I、II、III属于硬科幻作品,小说中的很多内容涉及到了自然科学的方方面面,而且都相当严谨。作为描写宇宙范围内不同文明之间相互角逐的小说,这三部曲中关于天文学领域的内容成为最广泛的话题。 相似文献
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A. Van Ardenne P. N. Wilkinson P. D. Patel J. G. Bij De Vaate 《Experimental Astronomy》2004,17(1-3):65-77
ASTRON has demonstrated the capabilities of a 4 m2, dense phased array antenna (Bij de Vaate et al., 2002) for radio astronomy, as part of the Thousand Element Array project (ThEA). Although it proved the principle, a definitive answer related to the viability of the dense phased array approach for the SKA could not be given, due to the limited collecting area of the array considered. A larger demonstrator has therefore been defined, known as “Electronic Multi-Beam Radio Astronomy Concept”, EMBRACE, which will have an area of 625 m2, operate in the band 0.4–1.550 GHz and have at least two independent and steerable beams. With this collecting area EMBRACE can function as a radio astronomy instrument whose sensitivity is comparable to that of a 25-m diameter dish. The collecting area also represents a significant percentage area (∼10%) of an individual SKA “station.” This paper presents the plans for the realisation of the EMBRACE demonstrator. 相似文献