全文获取类型
收费全文 | 1512篇 |
免费 | 13篇 |
国内免费 | 30篇 |
专业分类
教育 | 815篇 |
科学研究 | 210篇 |
各国文化 | 10篇 |
体育 | 370篇 |
综合类 | 10篇 |
文化理论 | 4篇 |
信息传播 | 136篇 |
出版年
2024年 | 6篇 |
2023年 | 3篇 |
2021年 | 6篇 |
2016年 | 3篇 |
2015年 | 5篇 |
2014年 | 23篇 |
2013年 | 16篇 |
2012年 | 90篇 |
2011年 | 161篇 |
2010年 | 52篇 |
2009年 | 16篇 |
2008年 | 89篇 |
2007年 | 98篇 |
2006年 | 85篇 |
2005年 | 88篇 |
2004年 | 102篇 |
2003年 | 82篇 |
2002年 | 85篇 |
2001年 | 47篇 |
2000年 | 63篇 |
1999年 | 44篇 |
1998年 | 13篇 |
1997年 | 12篇 |
1996年 | 17篇 |
1995年 | 14篇 |
1994年 | 15篇 |
1993年 | 20篇 |
1992年 | 11篇 |
1991年 | 32篇 |
1990年 | 24篇 |
1989年 | 24篇 |
1988年 | 12篇 |
1987年 | 15篇 |
1986年 | 13篇 |
1985年 | 19篇 |
1984年 | 15篇 |
1983年 | 17篇 |
1982年 | 18篇 |
1981年 | 18篇 |
1980年 | 10篇 |
1979年 | 21篇 |
1978年 | 3篇 |
1977年 | 8篇 |
1976年 | 5篇 |
1975年 | 2篇 |
1974年 | 2篇 |
1958年 | 7篇 |
1955年 | 3篇 |
1948年 | 2篇 |
1938年 | 2篇 |
排序方式: 共有1555条查询结果,搜索用时 15 毫秒
71.
The AIDS Library evolved out of consumer health activism in response to the need for the latest HIV information, materials, and technology. In 1998, staff implemented a microcomputer-based integrated automated library system with Web publishing capability to link catalogs, databases of Philadelphia regional services, online publications, and fact sheets. The Web site, , became "live" December 1, 1998. History leading to its development and future plans are presented. 相似文献
72.
Reis R 《Science communication》1999,21(2):137-155
This article examines how two important Brazilian newspapers (Floha de S. Paulo and O Globo) covered the UN Conference on Environment and Development (UNCED) or Earth Summit. The analysis will also determine the characteristics of the environmental media and its significance when it comes to coverage of environmental issues. This article provides historical background information on the environmental media in the US and in Brazil, contextual information on the Earth Summit, a content analysis of stories about UNCED published by the two Brazilian newspapers. Overall, 649 news items were used to determine the type of sources used, as well as the kind of issues covered. The analysis showed that government officials were the most frequently cited sources, while environmentalists and scientists were all but ignored as news sources. The analysis also indicated that economic issues were surprisingly prominent in the coverage. These results are compatible with the previous studies done in several countries and indicate that environmental media are still extremely reliant on "official" voices. The finding also highlight the fact that the range of issues covered by the environmental media largely reflects the perceived public agenda. 相似文献
73.
六、人类学的田野调查在中国的这么多年间 ,葛维汉对四川西藏交界地区、四川云南交界地区和四川省内及周边地区进行了十五次夏季考察。这些关于他的人类学田野调查的情况是从《1 92 3年— 1 93 6年大卫·克罗克特·葛维汉论文指南》 (罗森威格 ,1 984年 )和各种葛维汉写的有关其搜集之旅的文章和书籍中搜集的。在可能的情况下 ,我已经试着写了一些与此相关的文章 ,描述这些考察。在一些情况下 ,没有关于这些考察的笔录 ,而找到的参考资料又没有注明日期。在本章末尾 ,是一份我尽可能搜集到的有关这些调查的暂时编年目录。1 92 1年 ,葛维汉第… 相似文献
74.
75.
Zemke R 《Training (New York, N.Y.)》1983,20(5):38-9, 42-3, 45
76.
77.
We compared the efficacy of three physical conditioning programmes provided over a 12 week period (24 h in total) on selected anthropometric and physical fitness parameters in female soccer players. Two of the groups received physical conditioning training in accordance with speed, agility and quickness (SAQ); one group used specialized resistance and speed development SAQ equipment (equipment group; n = 12), while the other group used traditional soccer coaching equipment (non-equipment group; n = 12). A third group received their regular fitness sessions (active control group; n = 12). All three interventions decreased (P < 0.001) the participants' body mass index (-3.7%) and fat percentage (-1.7%), and increased their flexibility (+14.7%) and maximal aerobic capacity (VO2max) (+18.4%). The participants in the equipment and non-equipment conditioning groups showed significantly (P < 0.005) greater benefits from their training programme than those in the active control group by performing significantly better on the sprint to fatigue (-11.6% for both the equipment and non-equipment groups versus -6.2% for the active control group), 25 m sprint (-4.4% vs -0.7%), left (-4.5% vs -1.0%) and right (-4.0% vs -1.4%) side agility, and vertical (+18.5% vs +4.8%) and horizontal (+7.7% vs +1.6%) power tests. Some of these differences in improvements in physical fitness between the equipment and non-equipment conditioning groups on the one hand and the active control group on the other hand were probably due to the specificity of the training programmes. It was concluded that SAQ training principles appear to be effective in the physical conditioning of female soccer players. Moreover, these principles can be implemented during whole team training sessions without the need for specialized SAQ equipment. Finally, more research is required to establish the relationship between physical fitness and soccer performance as well as the principles underlying the improvements seen through the implementation of SAQ training programmes. 相似文献
78.
79.
Cullen R 《Health information and libraries journal》2004,21(1):3-13
This is the second part of a two-part paper which explores methods that can be used to evaluate digital libraries in the health sector. Part 1 focuses on approaches to evaluation that have been proposed for mainstream digital information services. This paper investigates evaluative models developed for some innovative digital library projects, and some major national and international electronic health information projects. The value of ethnographic methods to provide qualitative data to explore outcomes, adding to quantitative approaches based on inputs and outputs is discussed. The paper concludes that new 'post-positivist' models of evaluation are needed to cover all the dimensions of the digital library in the health sector, and some ways of doing this are outlined. 相似文献
80.
Developing multi-disciplinary library and information services is high on the agenda for many NHS trusts and this brings with it a climate of change for both those who manage and work in services today. The development of such new services needs to be carefully managed and developed, and this presents a challenge for librarians and service managers. In the UK during 1999 and 2000, Aintree Hospital Trust, in conjunction with Edge Hill College of Higher Education, established a truly multi-disciplinary service based at its hospital site and managed by Edge Hill. This paper outlines the key stages in the development of the Library and Information Service with the focus on the management of change, collaboration and the development of a unique partnership between Higher Education and an NHS trust. The case study example will provide an outline of strategic and project planning, with insights into staff management and development, delivering user expectations and developing stakeholder relationships in the health library setting. 相似文献