全文获取类型
收费全文 | 1524篇 |
免费 | 28篇 |
国内免费 | 3篇 |
专业分类
教育 | 1260篇 |
科学研究 | 36篇 |
各国文化 | 23篇 |
体育 | 52篇 |
综合类 | 1篇 |
文化理论 | 11篇 |
信息传播 | 172篇 |
出版年
2023年 | 6篇 |
2022年 | 6篇 |
2021年 | 17篇 |
2020年 | 24篇 |
2019年 | 43篇 |
2018年 | 63篇 |
2017年 | 57篇 |
2016年 | 53篇 |
2015年 | 41篇 |
2014年 | 49篇 |
2013年 | 339篇 |
2012年 | 36篇 |
2011年 | 48篇 |
2010年 | 38篇 |
2009年 | 41篇 |
2008年 | 47篇 |
2007年 | 60篇 |
2006年 | 40篇 |
2005年 | 37篇 |
2004年 | 15篇 |
2003年 | 24篇 |
2002年 | 38篇 |
2001年 | 26篇 |
2000年 | 21篇 |
1999年 | 25篇 |
1998年 | 21篇 |
1997年 | 25篇 |
1996年 | 23篇 |
1995年 | 19篇 |
1994年 | 25篇 |
1993年 | 34篇 |
1992年 | 19篇 |
1991年 | 17篇 |
1990年 | 21篇 |
1989年 | 14篇 |
1988年 | 8篇 |
1987年 | 8篇 |
1986年 | 15篇 |
1985年 | 15篇 |
1984年 | 8篇 |
1983年 | 8篇 |
1982年 | 6篇 |
1980年 | 4篇 |
1979年 | 5篇 |
1978年 | 8篇 |
1977年 | 10篇 |
1976年 | 4篇 |
1975年 | 9篇 |
1974年 | 9篇 |
1968年 | 3篇 |
排序方式: 共有1555条查询结果,搜索用时 15 毫秒
1.
2.
Jane Harrison 《Health information and libraries journal》1997,14(1):33-42
Thepractice of evidence-based health care requires that information on methodology be identifiedfrom databases such as MEDLINE. Up until this year there have been no designated medicalsubject headings (MeSH) for evidence-based health care. ‘EVIDENCE-BASEDMEDICINE’ appears as a MeSH term from 1997. The absence of designated MeSH forthis concept prior to 1997 provides a challenge to the searcher. This paper describes the creationof a MEDLINE search strategy to retrieve articles on the methods of evidence-based health carepublished prior to the introduction of the new term, where an optimal combination of free-textand MeSH terms is required to identify relevant material. The study examines both free-text andsubject heading searching and attempts an optimal balance of sensitivity and specificity. It beginsby examining separate free-text and subject heading searches. Sensitivity of the subject headingsearch was 33% and specificity 80%, while the free-text search produced asensitivity of 50% and a specificity of 67%. The final strategy, combining bothapproaches, was more successful with sensitivity reaching between 82 and 90% andspecificity 83%. It is therefore possible to devise a search strategy to retrieve articles on themethods of evidence-based health care with relatively successful rates of sensitivity andspecificity. The limitations of MEDLINE, however, necessitate the use of additional approachesin identifying articles on the methods of evidence-based health care. 相似文献
3.
4.
5.
6.
Gill Needham Jane Holdsworth Denise Miles 《Health information and libraries journal》1991,8(3):170-171
相似文献
7.
Jane Dorner 《Instructional Science》1992,21(1-3):5-14
Last year 1279 professional authors completed a lengthy questionnaire on their use of, and attitudes towards, technological tools for writing and publishing. The data were analysed quantitatively, by examining the most frequent responses to items on the questionnaire, and qualitatively, by looking closely at details illuminating the relationship between authors and publishers. The results, for present purposes, are divided into three broad bands of interest: first, what types of writing software authors are currently using; second, what the implications of using authors' disks in the publication chain are; and third, how technology alters perceptions of the copy as a unit of sale. Findings suggest that though authors are operating at basic levels, they have embraced technology with more enthusiasm than their publishers. The challenge facing those involved in books is to make provision for presenting and displaying work in electronic form: to improve contracts and licensing agreements, and to disseminate information on technology to authors.Funded by the British National Bibliography Reseach Fund.© Jane Dorner, 1991 相似文献
8.
Jane Henderson 《文物保护研究》2018,63(5):108-112
ABSTRACTThis paper examines how conservators engage with uncertainty when creating preventive conservation strategies. It argues that by recognising contexts in which uncertainty will be encountered conservators can develop effective management strategies. A typology of uncertainty explores a range of categories of uncertainty, their experience in preventive conservation and identifies distinct approaches to manage them. Managing uncertainty may include acts of defining its parameters, exposing and resolving through communication or protecting from with contingency. Whatever approach is adopted it must be accepted that uncertainty cannot be avoided. It is important therefore to aim to live well with uncertainty and the paper advocates for preventive conservation applications of strategies recommended in health care for patients with life-threatening illnesses. These strategies include working on things that can be controlled, goal setting, acceptance and factoring in emotions. The ability to identify contexts in which uncertainty is inbuilt should trigger those concerned with preventive conservation to activate strategies developed for managing and living well with uncertainty. 相似文献
9.
10.
Kirsty Jayne Elliott-Sale Ashley Graham Stephanie Jane Hanley Sherry Blumenthal Craig Sale 《European Journal of Sport Science》2019,19(1):62-70
AbstractMaternal dietary habits influence maternal and foetal health, representing a pathway for intervention to maximise pregnancy outcomes. Advice on energy intake is provided on a trimester basis, with no additional calories required in the first trimester and an additional 340?kcal?d?1 and 452?kcal?d?1 needed for the second and third trimesters. Energy intake depends on pre-gravid body mass index (BMI); underweight women are recommended an increase of 150, 200 and 300?kcal?d?1 during the first, second and third trimester, normal weight women an increase of 0, 350 and 500?kcal?d?1 and obese women an increase of 0, 450 and 350?kcal?day?1. The recommendations for carbohydrate and protein intake are 175?g?d?1 and 0.88–1.1?g?kgBM?d?1, with no change to fat intake. The number of pre-gravid obese women is rising; therefore, we need to regulate weight in women of childbearing age and limit gestational weight gain to within the recommended ranges [overweight women 6.8–11.3?kg and obese women 5.0–9.1?kg]. This can be achieved using nutritional interventions, as dietary changes have been shown to help with gestational weight management. As pregnancy has been identified as a risk factor for the development of obesity, normal weight women should gain 11.5–16.0?kg during pregnancy. While some research has shown that dietary interventions help to regulate gestational weight gain and promote postpartum weight loss to some extent, future research is needed to provide safe and effective guidelines to maximise these effects, while benefitting maternal and foetal health. 相似文献