全文获取类型
收费全文 | 13869篇 |
免费 | 205篇 |
国内免费 | 8篇 |
专业分类
教育 | 9612篇 |
科学研究 | 1346篇 |
各国文化 | 387篇 |
体育 | 1189篇 |
综合类 | 7篇 |
文化理论 | 146篇 |
信息传播 | 1395篇 |
出版年
2022年 | 100篇 |
2021年 | 162篇 |
2020年 | 229篇 |
2019年 | 373篇 |
2018年 | 538篇 |
2017年 | 520篇 |
2016年 | 494篇 |
2015年 | 299篇 |
2014年 | 382篇 |
2013年 | 2558篇 |
2012年 | 336篇 |
2011年 | 310篇 |
2010年 | 314篇 |
2009年 | 286篇 |
2008年 | 342篇 |
2007年 | 308篇 |
2006年 | 265篇 |
2005年 | 243篇 |
2004年 | 261篇 |
2003年 | 193篇 |
2002年 | 172篇 |
2001年 | 204篇 |
2000年 | 246篇 |
1999年 | 201篇 |
1998年 | 129篇 |
1997年 | 127篇 |
1996年 | 117篇 |
1995年 | 115篇 |
1994年 | 105篇 |
1993年 | 124篇 |
1992年 | 164篇 |
1991年 | 166篇 |
1990年 | 185篇 |
1989年 | 178篇 |
1988年 | 145篇 |
1987年 | 142篇 |
1986年 | 133篇 |
1985年 | 183篇 |
1984年 | 159篇 |
1983年 | 135篇 |
1982年 | 120篇 |
1981年 | 103篇 |
1980年 | 110篇 |
1979年 | 160篇 |
1978年 | 107篇 |
1977年 | 102篇 |
1976年 | 88篇 |
1975年 | 85篇 |
1974年 | 106篇 |
1973年 | 101篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
61.
I. V. Zibareva L. Yu. Ilina B. L. Alperin 《Scientific and Technical Information Processing》2018,45(2):106-109
The current state of the Russian Science Citation Index is analyzed. Several areas for its further development identified by long-standing active users, such as data searching, refinement, and storage; current user alerts; data input with the Science Index license; patent information; and the application programming interface (API) are investigated. 相似文献
62.
The present research investigated whether co-viewer comments in social TV interactions are able to enhance or weaken media effects. With the example of talent shows, the valence of co-viewer comments (pro/contra/none) as well as the type of content (antisocial behavior vs. conventional performance) were varied in an experiment (N = 117). Results showed that participants’ own comments and their private attitudes about the judges varied in line with comment valence. Findings suggest that social TV viewers are prone to social influence of their co-viewers, which might amplify problems regarding the portrayal of antisocial behavior in reality TV. 相似文献
63.
Matthew B. Hoy 《Medical reference services quarterly》2018,37(1):81-88
Voice assistants are software agents that can interpret human speech and respond via synthesized voices. Apple’s Siri, Amazon’s Alexa, Microsoft’s Cortana, and Google’s Assistant are the most popular voice assistants and are embedded in smartphones or dedicated home speakers. Users can ask their assistants questions, control home automation devices and media playback via voice, and manage other basic tasks such as email, to-do lists, and calendars with verbal commands. This column will explore the basic workings and common features of today’s voice assistants. It will also discuss some of the privacy and security issues inherent to voice assistants and some potential future uses for these devices. As voice assistants become more widely used, librarians will want to be familiar with their operation and perhaps consider them as a means to deliver library services and materials. 相似文献
64.
Albert Martin Susanne Bartscher-Finzer Anne Richards 《Publishing Research Quarterly》2018,34(1):69-88
Our study compares the motivations of Australian and German book publishers. The results demonstrate remarkable similarities, but also a significant difference regarding the effects of the publishers’ self-concept. In the German case the publishers with a dominant economic orientation are more proactive than the publishers with a dominant cultural orientation. In the Australian case, this correlation does not exist. The same difference holds for the relationship between the economic orientation and extrinsic motivation. We discuss these results and examine empirical evidence and theoretical suggestions to explain the differing findings. The data stem from surveys conducted in the two countries with responses of 196 (Germany) and 54 publishers (Australia). 相似文献
65.
Lotta Haglund Annikki Roos Petra Wallgren‐Björk 《Health information and libraries journal》2018,35(3):251-255
Librarians in Sweden are facing huge challenges in meeting the demands of their organisations and users. This article looks at four key areas: coping with open science/open access initiatives; increasing demands from researchers for support doing systematic reviews; understanding user experiences in Swedish health science libraries; and the consequences of expanding roles for recruitment and continuing professional development. With regard to changing roles, there is an increasing shift from the generalist towards the expert role. The authors raise the issue as to how to prepare those new to the profession to the changing environment of health science libraries. 相似文献
66.
Around 1960, the politics of the emerging media society in Sweden tended to fixate the formative functions of mass communication. The monopoly of public service broadcast media, press subsidies and new tendencies in film policy were some of the issues around which uncertainty prevailed. New methods to provide reliable data were sought by politicians, since empirical facts were required as arguments for an updated media policy. This article examines the different ways that the field of media studies was introduced in Sweden between 1960 and 1980. We argue that Swedish academic media studies departed from, and emerged within, a rather diffuse borderland between industry, politics and academia. The formation of national media research in Sweden can partly be seen as an effect of politicians and the media industry wanting to be better informed on issues such as media influence, media ownership and the habits and composition of the media audience. 相似文献
67.
Elena Rudkowsky Martin Haselmayer Matthias Wastian Marcelo Jenny Štefan Emrich Michael Sedlmair 《Communication methods and measures》2018,12(2-3):140-157
ABSTRACTMoving beyond the dominant bag-of-words approach to sentiment analysis we introduce an alternative procedure based on distributed word embeddings. The strength of word embeddings is the ability to capture similarities in word meaning. We use word embeddings as part of a supervised machine learning procedure which estimates levels of negativity in parliamentary speeches. The procedure’s accuracy is evaluated with crowdcoded training sentences; its external validity through a study of patterns of negativity in Austrian parliamentary speeches. The results show the potential of the word embeddings approach for sentiment analysis in the social sciences. 相似文献
68.
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
69.
Critical communication pedagogy and service learning in a mixed-method communication research course
ABSTRACTCourse: Mixed-Method Communication Research MethodsObjective: The purpose of this semester-long activity is to provide students with opportunities to cultivate mixed-method communication research skills through a social justice-informed service-learning format. Completing this course, students will be able to: recognize the unique strengths of quantitative and qualitative research methods; locate, evaluate, and utilize scholarly literature for a literature review; conduct an original research project using quantitative and qualitative research methods to gather and analyze data; and raise self and community awareness about a social issue through collaboration with a community organization. 相似文献
70.