全文获取类型
收费全文 | 14841篇 |
免费 | 213篇 |
国内免费 | 22篇 |
专业分类
教育 | 10386篇 |
科学研究 | 1601篇 |
各国文化 | 140篇 |
体育 | 1282篇 |
综合类 | 6篇 |
文化理论 | 122篇 |
信息传播 | 1539篇 |
出版年
2021年 | 149篇 |
2020年 | 215篇 |
2019年 | 302篇 |
2018年 | 406篇 |
2017年 | 387篇 |
2016年 | 406篇 |
2015年 | 263篇 |
2014年 | 342篇 |
2013年 | 2657篇 |
2012年 | 335篇 |
2011年 | 351篇 |
2010年 | 306篇 |
2009年 | 243篇 |
2008年 | 301篇 |
2007年 | 277篇 |
2006年 | 264篇 |
2005年 | 244篇 |
2004年 | 260篇 |
2003年 | 233篇 |
2002年 | 207篇 |
2001年 | 463篇 |
2000年 | 315篇 |
1999年 | 275篇 |
1998年 | 130篇 |
1997年 | 175篇 |
1996年 | 147篇 |
1995年 | 139篇 |
1994年 | 160篇 |
1993年 | 131篇 |
1992年 | 195篇 |
1991年 | 224篇 |
1990年 | 201篇 |
1989年 | 209篇 |
1988年 | 185篇 |
1987年 | 174篇 |
1986年 | 180篇 |
1985年 | 217篇 |
1984年 | 169篇 |
1983年 | 160篇 |
1982年 | 140篇 |
1981年 | 138篇 |
1980年 | 127篇 |
1979年 | 180篇 |
1978年 | 147篇 |
1977年 | 129篇 |
1976年 | 108篇 |
1975年 | 122篇 |
1974年 | 109篇 |
1973年 | 112篇 |
1971年 | 104篇 |
排序方式: 共有10000条查询结果,搜索用时 27 毫秒
81.
82.
83.
84.
Randall C. Jimerson 《Archival Science》2006,6(3-4):299-312
J. Franklin Jameson and Waldo G. Leland remain forever linked in American archival history as the founders, respectively, of the National Archives and the American archival profession. From the immediate post-Revolutionary period until the eve of the First World War, American historians recognized that their nation's early history remained locked in European archives. However, not until the pioneering efforts of Leland, working under supervision of Jameson during the early 20th century, did any of these historical researchers bring to the United States, along with the voluminous copies of archival documents, the emerging tenets of European archival theory. This is the story of the collaboration between Jameson and Leland, and of Leland's efforts to professionalize American archival practice on the basis of European archival theory. 相似文献
85.
86.
87.
This research analyzed a dataset of academic libraries' posts on Facebook. It applied a text and data analytics approach to a dataset collected from the Facebook posts of academic libraries at the top 100 English-speaking universities, as listed by the 2014 Shanghai World University Rankings. The dataset is from a two-year posting history of 18,333 unique posts, 113,621 likes, and 3401 comments. Less than a quarter of the libraries had more than 2000 post-related likes, and only seven received more than 100 comments on their postings. Content analysis identified the most prevalent single word (unigrams), bigrams (two-word sequences), and trigrams (three-word sequences) in high and low engagement content. Semantic analysis identified the semantic categories for posts with high and low engagement. The findings can assist academic libraries in their social media strategies for engagement, marketing, and visibility. 相似文献
88.
Cyberbullying is an increasingly common experience that produces psychosocial consequences for targets. Interventions encouraging bystanders to support targets of cyberbullying are limited by a lack of focus on what to communicate. This study considers supportive messages that emphasize emotional comfort, attributions of responsibility, and beliefs that people can change as relevant to this context, and it examines how perceptions of messages differ based on whether support providers have or lack experience with cyberbullying. We extend research on the indirect effects model of supportive communication by randomly assigning participants (N?=?304), who self-identify as targets of cyberbullying, to message and source conditions and assessing their perceptions of messages, providers, and outcomes. Impressions of messages mediate their influence on outcomes, and the experiential similarity of support providers moderates these effects. Certain messages, notably those contending that bullies can change, are less effective when delivered by sources who lack experience with bullying. 相似文献
89.
Communication is constitutive—in theory. In research, however, communication is often treated as an outcome, influenced by personal attributes. The present research examines social communication competence as a constitutive influence predicting self-compassion and hope. Path analysis results support this hypothesis. Results show that social communication expressivity (β = .14), sensitivity (β = –.32), and control (β = .20) predict self-compassion. Social communication sensitivity (β = .26) and control (β = .27) affect hope agency, and social communication control (β = .29) predicts hope pathways thinking. These results provide evidence of the constitutive nature of communication. 相似文献
90.
Binge-watching—the intensive, consecutive viewing of televised series—has become a prevalent usage pattern of entertainment media, which may influence users’ psychological well-being both positively and negatively: On the one hand, binge-watching could increase viewers’ enjoyment, recovery experiences, and vitality through an increase in perceived autonomy. On the other hand, binge-watching can trigger goal conflicts and feelings of guilt, which may reduce well-being. Drawing on an online survey (N = 499), the present study examines the tension between these two mechanisms and their effects on users’ well-being. The data largely support the hypotheses: Binge-watching is perceived as recreational as long as goal conflicts and feelings of guilt can be avoided. Well-being, on the other hand, is positively affected by binge-watching-induced increases in perceived autonomy. These results corroborate the central role of self-determination as a link between media reception, media enjoyment, and psychological well-being. 相似文献