全文获取类型
收费全文 | 13704篇 |
免费 | 215篇 |
国内免费 | 12篇 |
专业分类
教育 | 9443篇 |
科学研究 | 1711篇 |
各国文化 | 124篇 |
体育 | 1033篇 |
综合类 | 17篇 |
文化理论 | 164篇 |
信息传播 | 1439篇 |
出版年
2022年 | 96篇 |
2021年 | 140篇 |
2020年 | 215篇 |
2019年 | 293篇 |
2018年 | 417篇 |
2017年 | 442篇 |
2016年 | 406篇 |
2015年 | 265篇 |
2014年 | 379篇 |
2013年 | 2248篇 |
2012年 | 336篇 |
2011年 | 314篇 |
2010年 | 309篇 |
2009年 | 269篇 |
2008年 | 289篇 |
2007年 | 289篇 |
2006年 | 276篇 |
2005年 | 232篇 |
2004年 | 262篇 |
2003年 | 226篇 |
2002年 | 240篇 |
2001年 | 318篇 |
2000年 | 336篇 |
1999年 | 253篇 |
1998年 | 142篇 |
1997年 | 183篇 |
1996年 | 181篇 |
1995年 | 123篇 |
1994年 | 130篇 |
1993年 | 116篇 |
1992年 | 196篇 |
1991年 | 186篇 |
1990年 | 214篇 |
1989年 | 210篇 |
1988年 | 182篇 |
1987年 | 193篇 |
1986年 | 177篇 |
1985年 | 209篇 |
1984年 | 152篇 |
1983年 | 131篇 |
1982年 | 132篇 |
1981年 | 110篇 |
1980年 | 114篇 |
1979年 | 177篇 |
1978年 | 133篇 |
1977年 | 113篇 |
1976年 | 91篇 |
1975年 | 93篇 |
1974年 | 94篇 |
1973年 | 92篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
82.
83.
84.
85.
86.
K. S. Yakovlev D. A. Makarov E. S. Baskin 《Scientific and Technical Information Processing》2015,42(5):347-358
In the article we solve path planning task for an agent being multirotor unmanned aerial vehicle (multicopter). We propose an approach of estimating path geometry constraints based on UAV flight dynamics model and control constraints. Than we introduce a new path finding method which takes into consideration those geometry constraints and study this method both theoretically and empirically. 相似文献
87.
88.
Leonardo S. Fortes Dalton De Lima-Junior Lenamar Fiorese José R. A. Nascimento-Júnior Arnaldo L. Mortatti Maria E. C. Ferreira 《Journal of sports sciences》2020,38(5):552-558
ABSTRACTThe objective of this study was to analyse the effect of the use of social networks in smartphones or playing video games on the passing decision-making performance in professional soccer athletes. Participants were 25 male professional soccer athletes (mean ± SD: age 23.4 ± 2.8 years). The participants performed three randomised conditions divided into three groups: control (CON), smartphone (SMA), and video game (VID). Before and after each experimental condition, the Stroop Task assessed the level of induced mental fatigue. Then, the athletes performed a simulated soccer match. A CANON® camera recorded the matches for further analysis on passing decision-making performance. A group effect was identified (p < .01) with impairment on passing decision-making performance for the SMA (p = .01, ES = 0.5) and VID (p = .01, ES = 0.5) conditions. We concluded that the use of social networks on smartphones and/or playing video games right before official soccer matches might impair the passing decision-making performance in professional soccer athletes. 相似文献
89.
A Comparative Analysis of Graduate Employment Prospects in European Labour Markets: A Study of Graduate Recruitment in Four Countries
下载免费PDF全文
![点击此处可从《Higher Education Quarterly》网站下载免费的PDF全文](/ch/ext_images/free.gif)
The aim of this paper is to provide a comparative analysis of higher education and the graduate labour markets in selected European countries (France, Germany, Spain and United Kingdom) in the context of the expectations of graduates and prospective employers, and respective recruitment and selection practices. Expectations of graduating students from a number of European collaborating universities are sought and analysed in order to find out about a match between the knowledge and skills of graduates and the needs of European employers. The study examines the process of graduate recruitment, employee and employer expectations, and the role of higher education institutions in meeting such expectations. Primary data was gathered from 252 employers and 485 final year (graduating) students through the use of questionnaires. The analysis of the data collected has revealed different approaches to but similar methods of graduate recruitment between the four countries. Despite the current differences in higher education systems and labour market trends, the expectations of employers and graduating students are more similar than different. It is concluded that EU graduates will have good employment prospects in an integrated labour market. 相似文献
90.