全文获取类型
收费全文 | 15720篇 |
免费 | 456篇 |
国内免费 | 624篇 |
专业分类
教育 | 10797篇 |
科学研究 | 2594篇 |
各国文化 | 191篇 |
体育 | 692篇 |
综合类 | 976篇 |
文化理论 | 27篇 |
信息传播 | 1523篇 |
出版年
2024年 | 7篇 |
2023年 | 110篇 |
2022年 | 161篇 |
2021年 | 354篇 |
2020年 | 483篇 |
2019年 | 426篇 |
2018年 | 367篇 |
2017年 | 327篇 |
2016年 | 406篇 |
2015年 | 479篇 |
2014年 | 555篇 |
2013年 | 1053篇 |
2012年 | 1159篇 |
2011年 | 1167篇 |
2010年 | 693篇 |
2009年 | 795篇 |
2008年 | 1109篇 |
2007年 | 1251篇 |
2006年 | 1315篇 |
2005年 | 1106篇 |
2004年 | 938篇 |
2003年 | 707篇 |
2002年 | 524篇 |
2001年 | 367篇 |
2000年 | 289篇 |
1999年 | 148篇 |
1998年 | 95篇 |
1997年 | 90篇 |
1996年 | 76篇 |
1995年 | 41篇 |
1994年 | 43篇 |
1993年 | 37篇 |
1992年 | 30篇 |
1991年 | 23篇 |
1990年 | 15篇 |
1989年 | 22篇 |
1988年 | 3篇 |
1987年 | 6篇 |
1986年 | 1篇 |
1985年 | 8篇 |
1984年 | 2篇 |
1983年 | 2篇 |
1981年 | 1篇 |
1980年 | 2篇 |
1979年 | 5篇 |
1976年 | 1篇 |
1957年 | 1篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
91.
Dian Olson Belanger 《Journal of Government Information》2004,30(4):482-489
When 1 July 1957 “dawned” in the dark of the south polar night, Americans at seven scientific stations scattered across Antarctica officially began systematic, synoptic observations of the air above and ice below. Joining scientists from 11 other countries on the polar continent, they were part of the International Geophysical Year, an 18-month worldwide effort to understand the earth and its environment. The Navy and other military services provided the transportation, construction, and maintenance to make life and work possible on the ice. The scientific success and value of the IGY inspired a mechanism—the Antarctic Treaty of 1959—for a peaceful future focused on the cooperative pursuit of scientific knowledge. While imperfect and fragile, the treaty is still in force and, with continuing military and civilian support, scientific research in Antarctica prospers. All this was achieved in a remarkably short time, by disparate, thinly acquainted, mutually wary cultures—military, scientific, and diplomatic. All the more astonishing is that it happened within the tense context of the Cold War, as statesmen and warriors were wise enough to allow “apolitical” scientists to lead where they could not. 相似文献
92.
93.
中国大学网站的网络计量学研究 总被引:9,自引:0,他引:9
利用网络计量学方法,分析了国内主要大学网站的链接数、网络影响因子与这些大学在国内比较公认的大学排名中的得分之间的相关关系。同时验证了利用不同的搜索引擎的数据得到的结果的一致性,以及就某一搜索引擎而言,不同时间段收集到的两轮数据得到的结果的一致性。 相似文献
94.
国家科学数字图书馆网络联合参考咨询服务质量控制及评价方案研究* 总被引:24,自引:0,他引:24
介绍了国内外数字参考咨询服务质量评价体系的研究与应用概况。结合国家科学数字图书馆网络联合数字参考咨询服务的质量控制需要,在项目一期建设基础上选取部分指标建立了实际操作的评价体系,并制定了制度化的系统评价方案。 相似文献
95.
论文提出在进行联合编目、共同建设数据库、寻求资源共享等工作中必须充分关注书目数据的质量问题,必须加强数据编制的标准化和规范化,逐步形成一个工作标准。 相似文献
96.
研究了食品工业文献分类的三个问题:食品工业文献的分类标准;食品工业文献的分类体系;食品工业文献的分类方法。 相似文献
97.
98.
Nanhee Lee 《文物保护研究》2018,63(3):163-170
Currently, about ten Goryeo dynasty (918–1392 CE) sutra boxes are preserved in museums in Korea, Japan, the United States, the Netherlands, and the United Kingdom. This article is the result of an examination of a sutra box in the collection of the Rijksmuseum, Amsterdam (hereafter ‘Rijksmuseum sutra box’), which was first introduced to a European audience in the Transactions and Proceedings of the Japanese Society, in 1913–1914. The Rijksmuseum sutra box differs from other Goryeo sutra boxes. With its altered structure and modified motifs, this box bears significant value, not only for the research of thirteenth-century Goryeo mother-of-pearl art, but also for the study of cross-cultural adaptations in East Asian lacquer art. This article investigates the date of manufacture of the sutra box by analysing the manufacturing techniques and its various original and modified parts. For this, an X-ray radiograph was carried out for the first time. As a result, discoveries have been made regarding the structure and decoration of the lower part, which has been modified and is different from Goryeo mother-of-pearl sutra boxes. Finally, this paper reconsiders conservation and repair of Goryeo sutra boxes, as illuminated by an understanding of the original and repaired parts of this box. 相似文献
99.
100.
This article explores how the library-student liaison program at Eastern Washington University (EWU) Libraries has evolved into an opportunity for students to develop leadership skills. Originally designed to foster better communication between the EWU Libraries and students enrolled at the university, we recognized that the process of achieving established goals for the program provided a vehicle for students' leadership-skill development. To facilitate the leadership process, librarians employed the Social Change Model. Designed specifically for college students, this model engages the student to develop individual capacities to strengthen group activities that foster positive changes in the community and society. 相似文献