全文获取类型
收费全文 | 4712篇 |
免费 | 423篇 |
国内免费 | 4篇 |
专业分类
教育 | 4251篇 |
科学研究 | 134篇 |
各国文化 | 122篇 |
体育 | 202篇 |
综合类 | 5篇 |
文化理论 | 46篇 |
信息传播 | 379篇 |
出版年
2023年 | 20篇 |
2022年 | 31篇 |
2021年 | 88篇 |
2020年 | 120篇 |
2019年 | 224篇 |
2018年 | 237篇 |
2017年 | 282篇 |
2016年 | 208篇 |
2015年 | 230篇 |
2014年 | 259篇 |
2013年 | 1321篇 |
2012年 | 242篇 |
2011年 | 217篇 |
2010年 | 196篇 |
2009年 | 177篇 |
2008年 | 186篇 |
2007年 | 130篇 |
2006年 | 112篇 |
2005年 | 107篇 |
2004年 | 98篇 |
2003年 | 53篇 |
2002年 | 62篇 |
2001年 | 44篇 |
2000年 | 48篇 |
1999年 | 42篇 |
1998年 | 33篇 |
1997年 | 26篇 |
1996年 | 34篇 |
1995年 | 35篇 |
1994年 | 25篇 |
1993年 | 22篇 |
1992年 | 27篇 |
1991年 | 21篇 |
1990年 | 37篇 |
1989年 | 17篇 |
1988年 | 17篇 |
1987年 | 15篇 |
1986年 | 10篇 |
1985年 | 13篇 |
1984年 | 7篇 |
1983年 | 11篇 |
1982年 | 9篇 |
1981年 | 5篇 |
1980年 | 8篇 |
1979年 | 5篇 |
1978年 | 8篇 |
1977年 | 6篇 |
1974年 | 3篇 |
1969年 | 2篇 |
1963年 | 1篇 |
排序方式: 共有5139条查询结果,搜索用时 156 毫秒
1.
Edgardo Ferretti Leticia Cagnina Viviana Paiz Sebastián Delle Donne Rodrigo Zacagnini Marcelo Errecalde 《Information processing & management》2018,54(6):1169-1181
In this work, we present the first quality flaw prediction study for articles containing the two most frequent verifiability flaws in Spanish Wikipedia: articles which do not cite any references or sources at all (denominated Unreferenced) and articles that need additional citations for verification (so-called Refimprove). Based on the underlying characteristics of each flaw, different state-of-the-art approaches were evaluated. For articles not citing any references, a well-established rule-based approach was evaluated and interesting findings show that some of them suffer from Refimprove flaw instead. Likewise, for articles that need additional citations for verification, the well-known PU learning and one-class classification approaches were evaluated. Besides, new methods were compared and a new feature was also proposed to model this latter flaw. The results showed that new methods such as under-bagged decision trees with sum or majority voting rules, biased-SVM, and centroid-based balanced SVM, perform best in comparison with the ones previously published. 相似文献
2.
3.
4.
María Inés Tato 《档案与原稿》2020,48(2):200-215
ABSTRACT This paper aims to analyse the initiatives undertaken by some immigrant communities residing in Latin America to record their mobilisation around the First World War. After the armistice, European communities in Argentina, Bolivia, Brazil, Chile, Mexico, Paraguay, Peru, Uruguay and other countries gathered detailed information about their activities during the conflict, published as profusely illustrated books of remembrance, offered to their governments as proof of their loyalty. The article intends to establish the peculiar nature of these publications as records of the war effort, and analyse the agents and processes of their elaboration, and their role as commemorative but also as archival documents. 相似文献
5.
Hana Tur‐Kaspa 《Learning disabilities research & practice》2004,19(1):3-11
The study examined the social‐information‐processing skills of kindergarten children with developmental learning disabilities (LD) utilizing Crick and Dodge's (1994) model of children's social adjustment as a theoretical framework. Participants consisted of 20 kindergarten children with developmental LD who attended three integrated kindergartens and 20 children without developmental LD from the same kindergartens. Participants were assessed on social‐information‐processing skills, feelings of loneliness, sense of coherence, and teachers' ratings of behavioral problems and positive resources. The results indicated that girls with developmental LD performed significantly lower on two information‐processing steps—the response decision and the enactment steps—than did girls without LD. Such differences were not found for boys. The results also showed that the social‐information‐processing skills of children with developmental LD were correlated with teachers' ratings. 相似文献
6.
7.
8.
Athina Kolia‐Dermitzaki 《Al-Masaq: Islam & the Medieval Mediterranean》1994,7(1):267-278
Ducellier, A., Kaplan, M., Martin, Bernadette, avec la collaboration de Françoise Micheau. Le Moyen Âge en Orient. Byzance et l'Islam. Des Barbares aux Ottomans. Paris: Hachette Histoire Université, 1990. 相似文献
9.
采用日常生活活动功能指数、丧失率、L ogistic回归分析 ,对江西省上饶市老年人日常生活活动独立自理能力进行评价并对其影响因素进行研究。结果表明 ,江西省上饶市老年人日常生活活动功能的丧失率随年龄的增长而增大 ,男性高于女性 ,下肢高于上肢 ,丧失率随活动的复杂程度及难度的增大而上升。身体健康是影响老年人日常生活活动功能的最主要因素 ,其次是社会经济、心理、精神等因素。 相似文献
10.