全文获取类型
收费全文 | 10330篇 |
免费 | 83篇 |
国内免费 | 9篇 |
专业分类
教育 | 6932篇 |
科学研究 | 1362篇 |
各国文化 | 122篇 |
体育 | 704篇 |
综合类 | 5篇 |
文化理论 | 94篇 |
信息传播 | 1203篇 |
出版年
2020年 | 103篇 |
2019年 | 155篇 |
2018年 | 171篇 |
2017年 | 211篇 |
2016年 | 180篇 |
2015年 | 123篇 |
2014年 | 194篇 |
2013年 | 2040篇 |
2012年 | 173篇 |
2011年 | 167篇 |
2010年 | 140篇 |
2009年 | 156篇 |
2008年 | 188篇 |
2007年 | 178篇 |
2006年 | 171篇 |
2005年 | 145篇 |
2004年 | 130篇 |
2003年 | 124篇 |
2002年 | 116篇 |
2001年 | 127篇 |
2000年 | 148篇 |
1999年 | 128篇 |
1998年 | 86篇 |
1997年 | 82篇 |
1996年 | 94篇 |
1994年 | 101篇 |
1993年 | 111篇 |
1992年 | 144篇 |
1991年 | 150篇 |
1990年 | 148篇 |
1989年 | 154篇 |
1988年 | 126篇 |
1987年 | 139篇 |
1986年 | 147篇 |
1985年 | 160篇 |
1984年 | 155篇 |
1983年 | 154篇 |
1982年 | 120篇 |
1981年 | 131篇 |
1980年 | 109篇 |
1979年 | 150篇 |
1978年 | 153篇 |
1977年 | 108篇 |
1976年 | 108篇 |
1975年 | 101篇 |
1974年 | 84篇 |
1973年 | 101篇 |
1972年 | 86篇 |
1971年 | 80篇 |
1970年 | 83篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
41.
42.
Donsbach Wolfgang; Noelle-Neumann Elisabeth; Traugott Michael W.; Worcester Robert 《Int. Journal of Public Opinion Research》2006,18(3):273-274
This issue of the Journal contains three interesting articlesabout central aspects of public opinion research, as well asan equal number of research notes that reflect the range oftopics that interest all public opinion researchers. Toshio Takeshita takes a turn at reconceptualizing agenda-settingstudies, using a taxonomy 相似文献
43.
Question classification systems play an important role in question answering systems and can be used in a wide range of other domains. The goal of question classification is to accurately assign labels to questions based on expected answer type. Most approaches in the past have relied on matching questions against hand-crafted rules. However, rules require laborious effort to create and often suffer from being too specific. Statistical question classification methods overcome these issues by employing machine learning techniques. We empirically show that a statistical approach is robust and achieves good performance on three diverse data sets with little or no hand tuning. Furthermore, we examine the role different syntactic and semantic features have on performance. We find that semantic features tend to increase performance more than purely syntactic features. Finally, we analyze common causes of misclassification error and provide insight into ways they may be overcome. 相似文献
44.
Lucretia W McClure 《Journal of the Medical Library Association》2005,93(2):197-198
45.
The notion of social media affordances has not been fully integrated into the uses and gratifications literature. Building on the MAIN (modality, agency, interactivity, and navigability) model, this study develops and tests a social media uses and gratifications scale with a sample of 393 college students. Results of the study support the MAIN model, as conceptualizing social media uses and gratifications as a second-order factor structure with 4 different types of affordances displays similar goodness-of-fit to a single-order factor structure. A confirmatory factor analysis with a second sample of 313 adults further confirms the applicability of the scale among the general population. 相似文献
46.
47.
48.
49.
50.
Thinking outside of the box: the role of environmental adaptation in the acquisition of skilled and expert performance 总被引:1,自引:1,他引:0
Eccles DW 《Journal of sports sciences》2006,24(10):1103-1114