全文获取类型
| 收费全文 | 274篇 |
| 免费 | 16篇 |
| 国内免费 | 19篇 |
专业分类
| 教育 | 59篇 |
| 科学研究 | 141篇 |
| 各国文化 | 1篇 |
| 体育 | 17篇 |
| 信息传播 | 91篇 |
出版年
| 2017年 | 1篇 |
| 2016年 | 2篇 |
| 2015年 | 8篇 |
| 2014年 | 9篇 |
| 2013年 | 13篇 |
| 2012年 | 24篇 |
| 2011年 | 34篇 |
| 2010年 | 26篇 |
| 2009年 | 27篇 |
| 2008年 | 19篇 |
| 2007年 | 12篇 |
| 2006年 | 20篇 |
| 2005年 | 10篇 |
| 2004年 | 6篇 |
| 2003年 | 11篇 |
| 2002年 | 16篇 |
| 2001年 | 11篇 |
| 2000年 | 5篇 |
| 1999年 | 6篇 |
| 1998年 | 1篇 |
| 1997年 | 2篇 |
| 1996年 | 2篇 |
| 1995年 | 5篇 |
| 1994年 | 3篇 |
| 1993年 | 1篇 |
| 1992年 | 1篇 |
| 1991年 | 1篇 |
| 1990年 | 3篇 |
| 1989年 | 9篇 |
| 1981年 | 1篇 |
| 1980年 | 1篇 |
| 1977年 | 1篇 |
| 1958年 | 3篇 |
| 1957年 | 1篇 |
| 1955年 | 2篇 |
| 1954年 | 4篇 |
| 1948年 | 1篇 |
| 1947年 | 1篇 |
| 1934年 | 1篇 |
| 1933年 | 1篇 |
| 1932年 | 1篇 |
| 1928年 | 1篇 |
| 1927年 | 1篇 |
| 1926年 | 1篇 |
排序方式： 共有309条查询结果，搜索用时 140 毫秒
71.
73.
74.
75.
This article provides a brief history of the development of the MEDLINE database and its huge impact within the UK, from its inception to the present time. The origins of MEDLINE can be traced back to a collection of books in the US Surgeon General's Office during the American Civil War and John Shaw Billings' decision, during 1867, to make this Library as complete as possible. From these beginnings, Index Medicus was developed in the early years of the 20th century, and electronic versions of the database began with the computerized on-demand search service MEDLARS in 1964 and then via CD-ROM and Internet Grateful Med to the web-based and free-to-all service, PubMed, in 1997. The response to PubMed was immediate and startling with usage increasing from 7 million searches per annum in 1996 to 400 million searches per annum in 2001 and the service continues to improve. MEDLINE providers are now offering mapping of natural language queries to the sophisticated indexing vocabulary (Medical Subject Headings, MeSH) and the provision of specific filters for different types of publication to improve searching efficiency, as well as links to full-text versions of the papers where available. The next steps are likely to involve an increased blurring of database and full-text boundaries, incorporating seamless access to the best available evidence within MEDLINE and a wide range of other information resources within a single search and to an increasing amount of full-text via various open-archive initiatives. As ever, the US National Library of Medicine is in the vanguard of research and further applications of its MEDLINE database for users within the UK will be awaited with great interest. 相似文献
76.
2005年,《图书情报工作》获得了国家期刊奖提名奖,是图书情报类刊物中唯一获此殊荣者,十分难能可贵.响鼓也要重锤敲,下面对《图书情报工作》提出由小到大的三点希望,仅供参考: 相似文献
77.
78.
79.
Carnegie MA Bauman A Marshall AL Mohsin M Westley-Wise V Booth ML 《Research quarterly for exercise and sport》2002,73(2):146-155
Data for this study were from a population survey of 1,200 adults ages 40-60 years, sampled from the Illawarra region of New South Wales. Questionnaire items on perceptions of the environment were factor analyzed into: Aesthetic Environment and Practical Environment. For both factors, those in the Contemplation stage had more negative views of the environment than those in Maintenance. Those who walked for 0-20 min/week held more negative perceptions of their environment than those who walked for 21-120 min/week and those who walked for > 120 min/week. The health promotion implications of these findings are that environments perceived as attractive and as providing convenient access to services and facilities may influence motivational readiness for physical activity and time spent walking. 相似文献
80.
多年来,我国存在着大量的事业单位,它们从总体上说效率不高,构成了国家财政的极重负担。目前,事业单位的改革刚刚开始,全国各级各类信息(情报〕所都面临着严峻的挑战。在国家逐年减拨事业费的过程中,信息(情报)机构迫于生存的需要,往往倾向于放松基础性研究。而信息业的基础性研究领域是个发展非常快的领域,即使不断给 相似文献