全文获取类型
收费全文 | 30247篇 |
免费 | 461篇 |
国内免费 | 37篇 |
专业分类
教育 | 21842篇 |
科学研究 | 2451篇 |
各国文化 | 362篇 |
体育 | 2327篇 |
综合类 | 37篇 |
文化理论 | 312篇 |
信息传播 | 3414篇 |
出版年
2022年 | 179篇 |
2021年 | 296篇 |
2020年 | 498篇 |
2019年 | 691篇 |
2018年 | 957篇 |
2017年 | 1056篇 |
2016年 | 982篇 |
2015年 | 630篇 |
2014年 | 789篇 |
2013年 | 5922篇 |
2012年 | 767篇 |
2011年 | 836篇 |
2010年 | 668篇 |
2009年 | 625篇 |
2008年 | 774篇 |
2007年 | 687篇 |
2006年 | 629篇 |
2005年 | 559篇 |
2004年 | 499篇 |
2003年 | 501篇 |
2002年 | 528篇 |
2001年 | 551篇 |
2000年 | 505篇 |
1999年 | 510篇 |
1998年 | 311篇 |
1997年 | 330篇 |
1996年 | 362篇 |
1995年 | 321篇 |
1994年 | 318篇 |
1993年 | 283篇 |
1992年 | 408篇 |
1991年 | 397篇 |
1990年 | 423篇 |
1989年 | 395篇 |
1988年 | 366篇 |
1987年 | 310篇 |
1986年 | 321篇 |
1985年 | 391篇 |
1984年 | 323篇 |
1983年 | 326篇 |
1982年 | 265篇 |
1981年 | 278篇 |
1980年 | 251篇 |
1979年 | 306篇 |
1978年 | 264篇 |
1977年 | 236篇 |
1976年 | 208篇 |
1975年 | 172篇 |
1974年 | 156篇 |
1973年 | 174篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
Elodie A. Roy 《Media History》2018,24(1):26-45
Drawing from visual, material and written archival sources, this article critically explores some of the functions, uses and perceived values of recorded sound during the First World War and in its aftermath. An instrument of communication as well as commemoration, the gramophone helped bridge geographical (and, in some cases, cultural) distances between the home front and the rear, providing civilians with the fleeting illusion of presence, proximity, or even sentimental communion with the front. The article analyses (a) the affective and connective, but also propagandist, values of commercial wartime recordings as they circulated between the home and the front, (b) the popular notion of gramophones as regulatory instruments of civilisation, (c) the commemorative exploitations of recorded sound in the interwar period. The article focuses on the British experience, contrasting it with examples drawn from French and German experiences. 相似文献
92.
Daniel Maier A. Waldherr P. Miltner G. Wiedemann A. Niekler A. Keinert 《Communication methods and measures》2018,12(2-3):93-118
ABSTRACTLatent Dirichlet allocation (LDA) topic models are increasingly being used in communication research. Yet, questions regarding reliability and validity of the approach have received little attention thus far. In applying LDA to textual data, researchers need to tackle at least four major challenges that affect these criteria: (a) appropriate pre-processing of the text collection; (b) adequate selection of model parameters, including the number of topics to be generated; (c) evaluation of the model’s reliability; and (d) the process of validly interpreting the resulting topics. We review the research literature dealing with these questions and propose a methodology that approaches these challenges. Our overall goal is to make LDA topic modeling more accessible to communication researchers and to ensure compliance with disciplinary standards. Consequently, we develop a brief hands-on user guide for applying LDA topic modeling. We demonstrate the value of our approach with empirical data from an ongoing research project. 相似文献
93.
94.
This article explores the existence of a “citizen-centered journalism” that sees citizens as crucial participants in the construction of news and as co-creators of their own worlds. Through qualitative case studies of three news organizations, the article examines the motivation for using a citizen-centered approach, the news routines that are required to do so, the categories of content produced, and the perceived impact of this approach. The results suggest these news organizations are working in partnership with communities and striving to give a voice to historically marginalized communities. The journalists, however, see citizen participation as complementary to professional journalistic routines that favor verifiable information, rather than assigning inherent value to it for its own sake. 相似文献
95.
Sue Lacey Bryant Helen Bingham Ruth Carlyle Alison Day Linda Ferguson David Stewart 《Health information and libraries journal》2018,35(1):70-77
This article is the fourth in a series on New Directions. The National Health Service is under pressure, challenged to meet the needs of an ageing population, whilst striving to improve standards and ensure decision making is underpinned by evidence. Health Education England is steering a new course for NHS library and knowledge services in England to ensure access to knowledge and evidence for all decision makers. Knowledge for Healthcare calls for service transformation, role redesign, greater coordination and collaboration. To meet user expectations, health libraries must achieve sustainable, affordable access to digital content. Traditional tasks will progressively become mechanised. Alongside supporting learners, NHS librarians and knowledge specialists will take a greater role as knowledge brokers, delivering business critical services. They will support the NHS workforce to signpost patients and the public to high‐quality information. There is a need for greater efficiency and effectiveness through greater co‐operation and service mergers. Evaluation of service quality will focus more on outcomes, less on counting. These changes require an agile workforce, fit for the future. There is a bright future in which librarians’ expertise is used to mobilise evidence, manage and share knowledge, support patients, carers and families, optimise technology and social media and provide a keystone for improved patient care and safety. 相似文献
96.
97.
98.
99.
100.