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1 21世纪电源网 开放资源 专家推荐
  中国电源学会成立于1983年,是在国家民政部注册的国家一级社团法人,业务主管部门是中国科学技术协会。 世纪电源网是电源行业的信息技术交流平台,凭借庞大的电源数据库支持,将为广大电源工作者以及电源爱好者提供一个更大、更全、更专业的交流平台。 2008年6月中国电源学会世纪电源网全面上线,我们的宗旨是竭诚为企业和个人服务,打造电源行业门户网站和品牌,为业内人士及...
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2 A Brief History of Atomic Clocks at NIST 开放资源 馆员登记
  Part of the About.com site, this timeline describes the development of atomic clocks from 1945 when Isidor Rabi, a physics professor at Columbia University, suggested that such a c...
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3 A Brief History of Cosmology 开放资源 馆员登记
  This site describes the history of cosmology from the Babylonians and Ancient Greeks through to the early 1980s. Links are provided to biographies of some of the key astronomers in...
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4 A Global Overview of Renewable Energy Sources 开放资源 专家推荐
  European Commission information centre and knowledge gateway for renewable energy, helping to promote the European Union&primes strategy to achieve 12% of RES by 2010.;...
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5 Aalborg University - Electronic Library 开放资源 机器抓取
  This site is a university repository providing access to the research papers and publications of lecturers, and Ph.D theses, of Aalborg University. This site is poor in supporting ...
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6 Aaron Barth 开放资源 专家推荐
  Supermassive black holes are present in the centers of most or all giant galaxies, and it is believed that they have an important influence on the formation and evolution of galaxi...
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7 Abertay Research Collections 开放资源 机器抓取
  This site provides access to the output of the institution. Users may set up RSS feeds to be alerted to new content. The interface is in English. Some items are not available as fu...
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8 Aberystwyth University Repository (CADAIR) 开放资源 机器抓取
  This site is a university repository providing access to the publication output of the institution. The site interface is presented in English and Welsh. Registered users can set u...
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9 About.com -- Space / Astronomy 开放资源 馆员登记
  This page introduces the concepts of interstellar distances and astronomical units, and describes the size of the Universe in these terms. It also includes short biographies of Car...
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10 Academic Bibliography and Institutional Archive of Ghent University 开放资源 机器抓取
  This site is a university repository providing access to the publication output of the institution.Some items are not available as full-text. The site interface is in English. Regi...
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