全文获取类型
收费全文 | 6665篇 |
免费 | 67篇 |
国内免费 | 11篇 |
专业分类
教育 | 4906篇 |
科学研究 | 469篇 |
各国文化 | 72篇 |
体育 | 501篇 |
综合类 | 4篇 |
文化理论 | 84篇 |
信息传播 | 707篇 |
出版年
2022年 | 38篇 |
2021年 | 62篇 |
2020年 | 76篇 |
2019年 | 142篇 |
2018年 | 186篇 |
2017年 | 206篇 |
2016年 | 189篇 |
2015年 | 126篇 |
2014年 | 166篇 |
2013年 | 1470篇 |
2012年 | 175篇 |
2011年 | 167篇 |
2010年 | 184篇 |
2009年 | 171篇 |
2008年 | 192篇 |
2007年 | 194篇 |
2006年 | 147篇 |
2005年 | 122篇 |
2004年 | 126篇 |
2003年 | 113篇 |
2002年 | 145篇 |
2001年 | 86篇 |
2000年 | 130篇 |
1999年 | 111篇 |
1998年 | 96篇 |
1997年 | 88篇 |
1996年 | 98篇 |
1995年 | 75篇 |
1994年 | 80篇 |
1993年 | 82篇 |
1992年 | 80篇 |
1991年 | 86篇 |
1990年 | 75篇 |
1989年 | 67篇 |
1988年 | 52篇 |
1987年 | 65篇 |
1986年 | 66篇 |
1985年 | 69篇 |
1984年 | 58篇 |
1983年 | 53篇 |
1982年 | 52篇 |
1981年 | 53篇 |
1980年 | 54篇 |
1979年 | 48篇 |
1978年 | 59篇 |
1977年 | 51篇 |
1976年 | 47篇 |
1975年 | 38篇 |
1974年 | 41篇 |
1973年 | 33篇 |
排序方式: 共有6743条查询结果,搜索用时 15 毫秒
11.
Zuckerman: Scientist Extraordinary by Bernard Donovan BioScientifica, Bristol, 2005, 555pp. ISBN 1‐901978249 £24.95 Negotiating licences for digital resources by Fiona Durrant Facet Publishing, 2006, ISBN 1 85604 586 2 Metadata for Information Management and Retrieval By David Haynes Facet Publishing, 2004, ISBN 1 85604 4890 相似文献
12.
The Dynamics of Opinion Formation in Local Popular Referendums: Why the Dutch Always Say No 总被引:1,自引:0,他引:1
There is growing research on voting behavior in referendums.However, the dynamics of opinion formation in popular referendums,referendums initiated by the electorate to approve or rejectdecisions made by representative bodies, has not yet been studied.This is especially unfortunate as voting decisions in popularreferendums differ from those in other referendums in interestingways. Opinion formation can be a very dynamic process in popularreferendums, making the referendum campaign crucial. This paperstudies the dynamics of opinion formation in popular referendumsand relates them to particular characteristics of the campaignsand the issues at hand. Based on the literature, we consideredthe effects of the intensity of the yes and no campaigns, familiaritywith the issue, and partisan cues. Our study uses content analysisdata and data from public opinion surveys dealing with variouspopular referendums held in the Netherlands. The study revealedseveral factors that contributed to the volatility of opinionsin the referendum campaigns: the issue (new and did not fittraditional political schemes), lack of support from societaland community organizations for the position of the local authorities,and low profile campaigns on the part of local authorities.While some of these factors are general and may play a rolein referendums everywhere, some can be considered typicallyDutch, related to the characteristics of popular referendumsin the Netherlands and the countrys political system. 相似文献
13.
This article explores the evolution of the role of academic journal articles submitted to the UK's Research Assessment Exercise (RAE). By reviewing their role, it is possible to see how the changes from quantitative to qualitative assessment (and the resulting problems surrounding the definition of ‘quality’ journals) has impacted both on the journals selected by academics for publishing their research and the assessment of them. Although only one part of RAE submissions, the listing of published research outputs provides the primary evidence for research quality to most RAE panels, and is a significant driver of the final grade awarded, and thus the funding received by submitting institutions. The RAE, being a peer‐reviewed assessment exercise, mirrors in some ways the peer‐review process immured within scholarly publication. The developing role of journal publications as a vehicle for academic research output is examined via the chronology of the RAE, before assessing the current situation in which published journal output formed almost 70% of all output assessed by RAE panels in the latest exercise. The impact of this increased importance of academic journals in the assessment process is considered not only for academics but also for the wider community, i.e. publishers and libraries. 相似文献
14.
Peter Banks 《Learned Publishing》2004,17(2):135-142
The benefits claimed for open access publishing in the medical area are subjected to evaluation and question. It is represented that these benefits are, in many cases, illusory or doubtful. 相似文献
15.
The purpose of this study is to find a theoretically grounded, practically applicable and useful granularity level of an algorithmically constructed publication-level classification of research publications (ACPLC). The level addressed is the level of research topics. The methodology we propose uses synthesis papers and their reference articles to construct a baseline classification. A dataset of about 31 million publications, and their mutual citations relations, is used to obtain several ACPLCs of different granularity. Each ACPLC is compared to the baseline classification and the best performing ACPLC is identified. The results of two case studies show that the topics of the cases are closely associated with different classes of the identified ACPLC, and that these classes tend to treat only one topic. Further, the class size variation is moderate, and only a small proportion of the publications belong to very small classes. For these reasons, we conclude that the proposed methodology is suitable to determine the topic granularity level of an ACPLC and that the ACPLC identified by this methodology is useful for bibliometric analyses. 相似文献
16.
17.
18.
19.
香港大学图书馆领导研修班是为现任和未来图书馆领导而设的密集式培训班,预计参加者主要为现任或未来的馆长或助理馆长.研修班将采用英语作为主要讲授语言另辅以部分中文翻译,采取让学员透过一系列主题讲学、个案研究、小组活动及互动讨论的方式向其它馆员和资讯业专家学习. 相似文献
20.
The development of peak performances is a main research focus in sports science. It is unclear how many former top junior athletes achieve success in the elite class later. The aim of the present study was to examine the careers of athletes who participated in major junior or adult/elite cycling events using prospective and retrospective analysis of competition results. The official results of major junior (age < or = 18 years) and elite (age > 18 years) cycling races from 1980 to 2004 were analysed. Age-related aspects, career lengths, and success were compared between riders who presented results in both junior and elite races (JUNIOR ELITE) and riders who had no junior race results (ELITE ONLY). Altogether, 27,454 results of 8004 athletes from 108 countries were collected. We found that 29.4% of the elite athletes had participated in junior World Championships, and that 34% of the participants in junior World Championships later participated in major elite competitions. JUNIOR ELITE athletes are significantly more successful in several cycling disciplines and have their first and last elite result at a younger age than ELITE ONLY athletes. No difference was found in career lengths. The data presented here emphasize the importance of long-term training programmes in the development of peak performance in cycling. 相似文献