全文获取类型
| 收费全文 | 6140篇 |
| 免费 | 78篇 |
| 国内免费 | 11篇 |
专业分类
| 教育 | 4502篇 |
| 科学研究 | 458篇 |
| 各国文化 | 121篇 |
| 体育 | 498篇 |
| 综合类 | 2篇 |
| 文化理论 | 58篇 |
| 信息传播 | 590篇 |
出版年
| 2021年 | 52篇 |
| 2020年 | 79篇 |
| 2019年 | 145篇 |
| 2018年 | 190篇 |
| 2017年 | 199篇 |
| 2016年 | 221篇 |
| 2015年 | 129篇 |
| 2014年 | 154篇 |
| 2013年 | 1533篇 |
| 2012年 | 128篇 |
| 2011年 | 153篇 |
| 2010年 | 128篇 |
| 2009年 | 140篇 |
| 2008年 | 159篇 |
| 2007年 | 123篇 |
| 2006年 | 109篇 |
| 2005年 | 122篇 |
| 2004年 | 118篇 |
| 2003年 | 98篇 |
| 2002年 | 120篇 |
| 2001年 | 89篇 |
| 2000年 | 95篇 |
| 1999年 | 89篇 |
| 1998年 | 57篇 |
| 1997年 | 76篇 |
| 1996年 | 59篇 |
| 1995年 | 56篇 |
| 1994年 | 52篇 |
| 1993年 | 57篇 |
| 1992年 | 72篇 |
| 1991年 | 89篇 |
| 1990年 | 71篇 |
| 1989年 | 69篇 |
| 1988年 | 46篇 |
| 1987年 | 74篇 |
| 1986年 | 46篇 |
| 1985年 | 62篇 |
| 1984年 | 56篇 |
| 1983年 | 56篇 |
| 1982年 | 46篇 |
| 1981年 | 45篇 |
| 1980年 | 33篇 |
| 1979年 | 50篇 |
| 1978年 | 55篇 |
| 1977年 | 53篇 |
| 1976年 | 36篇 |
| 1975年 | 42篇 |
| 1974年 | 31篇 |
| 1973年 | 28篇 |
| 1971年 | 34篇 |
排序方式： 共有6229条查询结果，搜索用时 390 毫秒
11.
12.
13.
14.
15.
相似文献
16.
17.
18.
The Cross-Language Evaluation Forum has encouraged research in text retrieval methods for numerous European languages and has developed durable test suites that allow language-specific techniques to be investigated and compared. The labor associated with crafting a retrieval system that takes advantage of sophisticated linguistic methods is daunting. We examine whether language-neutral methods can achieve accuracy comparable to language-specific methods with less concomitant software complexity. Using the CLEF 2002 test set we demonstrate empirically how overlapping character n-gram tokenization can provide retrieval accuracy that rivals the best current language-specific approaches for European languages. We show that n = 4 is a good choice for those languages, and document the increased storage and time requirements of the technique. We report on the benefits of and challenges posed by n-grams, and explain peculiarities attendant to bilingual retrieval. Our findings demonstrate clearly that accuracy using n-gram indexing rivals or exceeds accuracy using unnormalized words, for both monolingual and bilingual retrieval. 相似文献
19.
Validating the Willingness to Self-Censor Scale: Individual Differences in the Effect of the Climate of Opinion on Opinion Expression 总被引：1，自引：0，他引：1
Hayes Andrew F.; Glynn Carroll J.; Shanahan James 《Int. Journal of Public Opinion Research》2005,17(4):443-455
Hayes, Glynn, and Shanahan (2005) defined self-censorship asthe withholding of one’s opinion around an audience perceivedto disagree with that opinion. They argued that people differin their willingness to self-censor and introduced an 8-itemself-report instrument, the Willingness to Self-Censor scale,to measure this individual difference. The results of an experimentalstudy presented here provide further evidence of the constructvalidity of the scale. Each participant in the study was presentedwith a hypothetical scenario that contained information suggestinga group of people the participant was conversing with abouta controversial topic held opinions that were either uniformlysimilar to or different from the participant’s own opinion.Four weeks prior, each participant had responded to the Willingnessto Self-Censor scale and a measure of dispositional shyness.As expected, the manipulation of the climate of opinion affectedwillingness to express an opinion to the group, but more soamong those who scored relatively high on the Willingness toSelf-Censor scale. These results support the notion that somepeople rely on information about the climate of opinion moreso than do others when they decide whether or not to voice theiropinion publicly, and they suggest that the Willingness to Self-Censorscale measures this individual difference. 相似文献
20.
Chris Brown 《图书馆管理杂志》2018,58(4):375-381
This article proposes the incorporation of learning science into the programming and operation of public libraries. Learning science, a multidisciplinary field spanning cognitive science, psychology, neuroscience, economics, anthropology, and linguistics, has identified proven methods for enhancing learning at any age. The article highlights some of the tools and insights that are most relevant to libraries in their role as centers for informal learning. 相似文献