Change＇4 Lunar Probe will softly land on the farside of the Moon for the first time of all mankind and carry out in-situ and rovering exploration. In this paper, the scientific significance and engineering difficulti...Change＇4 Lunar Probe will softly land on the farside of the Moon for the first time of all mankind and carry out in-situ and rovering exploration. In this paper, the scientific significance and engineering difficulties of Change＇4 are introduced and the probe＇s general design, including the aspects of landing site selection, relay communication, trajectory design of relay satellite is explained. Besides, four key technologies, namely safe landing strategy on complex terrain, orbit design and control of libration point 2, relay communication on L2, radioisotope thermoelectric generator （RTG） and electric-thermal utilization, as well as how to realize them are also discussed. Finally the prospect of the prominent technological breakthrough of Change＇4 is described.展开更多
本文以Web of Science数据库为基础,用"climate change"作为搜索词,检索《科学传播》(Science Communication)期刊中关于气候变化的文献,并从文献的类型、出版年份、国家/地区分布、作者背景、发表机构、研究主题等角度进行...本文以Web of Science数据库为基础,用"climate change"作为搜索词,检索《科学传播》(Science Communication)期刊中关于气候变化的文献,并从文献的类型、出版年份、国家/地区分布、作者背景、发表机构、研究主题等角度进行统计分析,用定量的数据反映科学传播领域对气候变化的研究情况。研究结果表明:《科学传播》发表的关于气候变化议题的文献数量相对较少,共计33篇;科学传播领域对气候变化议题的研究在全球分布是极不平衡的,欧美论文占据了论文总数的90.9%;科学传播领域对气候变化议题的研究视域极其广泛,除社会科学之外,还涵盖了环境科学和健康科学,表现出较强的跨学科特色。展开更多
文摘Change＇4 Lunar Probe will softly land on the farside of the Moon for the first time of all mankind and carry out in-situ and rovering exploration. In this paper, the scientific significance and engineering difficulties of Change＇4 are introduced and the probe＇s general design, including the aspects of landing site selection, relay communication, trajectory design of relay satellite is explained. Besides, four key technologies, namely safe landing strategy on complex terrain, orbit design and control of libration point 2, relay communication on L2, radioisotope thermoelectric generator （RTG） and electric-thermal utilization, as well as how to realize them are also discussed. Finally the prospect of the prominent technological breakthrough of Change＇4 is described.
文摘本文以Web of Science数据库为基础,用"climate change"作为搜索词,检索《科学传播》(Science Communication)期刊中关于气候变化的文献,并从文献的类型、出版年份、国家/地区分布、作者背景、发表机构、研究主题等角度进行统计分析,用定量的数据反映科学传播领域对气候变化的研究情况。研究结果表明:《科学传播》发表的关于气候变化议题的文献数量相对较少,共计33篇;科学传播领域对气候变化议题的研究在全球分布是极不平衡的,欧美论文占据了论文总数的90.9%;科学传播领域对气候变化议题的研究视域极其广泛,除社会科学之外,还涵盖了环境科学和健康科学,表现出较强的跨学科特色。
