全文获取类型
收费全文 | 910篇 |
免费 | 18篇 |
专业分类
教育 | 612篇 |
科学研究 | 60篇 |
各国文化 | 15篇 |
体育 | 88篇 |
文化理论 | 10篇 |
信息传播 | 143篇 |
出版年
2023年 | 12篇 |
2022年 | 15篇 |
2021年 | 14篇 |
2020年 | 34篇 |
2019年 | 45篇 |
2018年 | 53篇 |
2017年 | 58篇 |
2016年 | 45篇 |
2015年 | 31篇 |
2014年 | 44篇 |
2013年 | 202篇 |
2012年 | 25篇 |
2011年 | 33篇 |
2010年 | 17篇 |
2009年 | 16篇 |
2008年 | 13篇 |
2007年 | 19篇 |
2006年 | 12篇 |
2005年 | 15篇 |
2004年 | 10篇 |
2003年 | 10篇 |
2002年 | 9篇 |
2001年 | 11篇 |
2000年 | 10篇 |
1999年 | 10篇 |
1998年 | 6篇 |
1996年 | 3篇 |
1995年 | 7篇 |
1994年 | 3篇 |
1993年 | 7篇 |
1992年 | 6篇 |
1991年 | 13篇 |
1990年 | 12篇 |
1989年 | 7篇 |
1988年 | 6篇 |
1987年 | 7篇 |
1986年 | 4篇 |
1985年 | 4篇 |
1983年 | 3篇 |
1982年 | 9篇 |
1981年 | 5篇 |
1979年 | 4篇 |
1976年 | 4篇 |
1975年 | 3篇 |
1974年 | 3篇 |
1969年 | 4篇 |
1966年 | 4篇 |
1919年 | 3篇 |
1860年 | 3篇 |
1859年 | 4篇 |
排序方式: 共有928条查询结果,搜索用时 31 毫秒
1.
2.
Measuring Search Engine Quality 总被引:12,自引:3,他引:9
The effectiveness of twenty public search engines is evaluated using TREC-inspired methods and a set of 54 queries taken from real Web search logs. The World Wide Web is taken as the test collection and a combination of crawler and text retrieval system is evaluated. The engines are compared on a range of measures derivable from binary relevance judgments of the first seven live results returned. Statistical testing reveals a significant difference between engines and high intercorrelations between measures. Surprisingly, given the dynamic nature of the Web and the time elapsed, there is also a high correlation between results of this study and a previous study by Gordon and Pathak. For nearly all engines, there is a gradual decline in precision at increasing cutoff after some initial fluctuation. Performance of the engines as a group is found to be inferior to the group of participants in the TREC-8 Large Web task, although the best engines approach the median of those systems. Shortcomings of current Web search evaluation methodology are identified and recommendations are made for future improvements. In particular, the present study and its predecessors deal with queries which are assumed to derive from a need to find a selection of documents relevant to a topic. By contrast, real Web search reflects a range of other information need types which require different judging and different measures. 相似文献
3.
4.
Research in Higher Education - Since the turn of the twenty-first century, going to college has become increasingly financially difficult in the United States. Tuition prices continued to rise,... 相似文献
5.
Benjamin D. Branch 《College & Undergraduate Libraries》2014,21(1):109-114
The role of the library is to assist citizens in skills development critical to national interest and empowerment as literacy ambassadors, in general. Specifically, the work by the Federal Geographic Data Committee (1994) indicates that spatial literacy is for every citizen and not just a set of workforce specialists. Hence, the use of maps in decision making and problem solving will become fundamental to all professions, including library professionals. Thus, a spatial literacy awareness and rationale for such as standard job ability is discussed as a future librarian workforce proficiency and knowledge transfer medium. 相似文献
6.
7.
Benjamin C. Ingman 《Educational Studies A Journal of the American Educational Studies Association》2019,55(3):346-367
Educational objectives focus practice and dictate what happens in US classrooms. Currently, instructional objectives are privileged in K–12 schools over other forms of objectives, thereby marginalizing the implementation of some educational perspectives. We argue that objectives should be expanded to attend to the student experience, promoting a variety of practices to utilize in classroom operations. In so doing, we suggest an addition to the network of objectives: experience-based objectives. We review the history of objectives before presenting experience-based objectives as embodying 5 major shifts in thinking, and as actualized through four criteria. 相似文献
8.
Martin Schnitzer Benjamin Bodner Sabrina Scheiber Erich Thöni Martin Kopp 《Sportwissenschaft》2016,46(1):26-33
The aim of this article is to gain insights into the economic impacts of the Winter Youth Olympic Games (YOG). Taking the example of Innsbruck 2012 (YOG 2012)—the first ever Winter YOG—the economic dimension of the event is comprised by calculating the primary economic impulse as well as the induced economic impulse (total economic effect). For the purpose of this study the region (Tirol) and the period of time (13th to 22th January 2012) were chosen. 相似文献
9.
Benjamin R. Bates 《Communication Studies》2016,67(3):321-338
Pentadic cartography is a useful way to examine the motivational vocabularies of discourses and to provide alternative vocabularies for negotiating rhetorical terrains. Pentadic cartographers have used Kenneth Burke’s principles to examine and critique the motivational vocabularies of texts as their vocabularies compete against one another. This article expands the application of pentadic cartography by exploring maps as “overlays” or when two pentadic vocabularies do not necessarily compete but can complement one another. This study examines two potential competing mappings present in former Secretary of Health and Human Services Kathleen Sibelius’s (2012) speech outlining a new global health strategy, as well as an overlay map that negotiates domestic and global health. Each mapping is assessed for its abilities to open and to close the universe of discourse. The possibility of overlays as a supplement to pentadic cartography is outlined. 相似文献
10.
Anne Focke Sina Spancken Christian Stockinger Benjamin Thürer Thorsten Stein 《European Journal of Sport Science》2016,16(7):787-793
Benefits of bilateral practice both for the non-dominant and for the dominant body side have been shown in several studies. Thereby, most of the studies included movement tasks of the upper extremity or investigated sports games in which the ability of acting bilaterally is an essential basis for success and, thus, a bilateral practice is reasonable anyway. Individual unilaterally performed sports including movement tasks of the lower extremity are rarely investigated. Therefore, the aim of our study was to test if contralateral transfer due to bilateral practice can be found in an unilaterally performed sport including the lower extremity. We trained and tested 61 adolescent athletes in long jump to compare the jumping performance of the dominant leg after a 12-week practice period between two groups: a bilateral practice group that practiced specific long jump exercises with both the dominant and non-dominant leg and an unilateral practice group that practiced specific long jump exercises only with the dominant leg. Results showed a superior effect of bilateral practice compared to unilateral practice regarding the jumping performance of the dominant leg. The performance increase at post-test and retention-test for the dominant limb was significantly higher for the bilateral practice group (pre-to-post: 5.2%, pre-to-retention: 7.4%) compared to the unilateral practice group (pre-to-post: 3.4%, pre-to-retention: 4.5%). Thus, bilateral practice should be established in the early practice programmes of track and field athletes to improve the performance of the dominant take-off leg. 相似文献