全文获取类型
收费全文 | 2179篇 |
免费 | 41篇 |
国内免费 | 1篇 |
专业分类
教育 | 1410篇 |
科学研究 | 139篇 |
各国文化 | 53篇 |
体育 | 270篇 |
综合类 | 1篇 |
文化理论 | 14篇 |
信息传播 | 334篇 |
出版年
2024年 | 4篇 |
2023年 | 9篇 |
2022年 | 16篇 |
2021年 | 35篇 |
2020年 | 59篇 |
2019年 | 116篇 |
2018年 | 125篇 |
2017年 | 133篇 |
2016年 | 98篇 |
2015年 | 67篇 |
2014年 | 90篇 |
2013年 | 461篇 |
2012年 | 70篇 |
2011年 | 65篇 |
2010年 | 66篇 |
2009年 | 66篇 |
2008年 | 72篇 |
2007年 | 66篇 |
2006年 | 55篇 |
2005年 | 51篇 |
2004年 | 43篇 |
2003年 | 44篇 |
2002年 | 33篇 |
2001年 | 31篇 |
2000年 | 24篇 |
1999年 | 23篇 |
1998年 | 34篇 |
1997年 | 19篇 |
1996年 | 14篇 |
1995年 | 19篇 |
1994年 | 17篇 |
1993年 | 18篇 |
1992年 | 14篇 |
1991年 | 11篇 |
1990年 | 19篇 |
1989年 | 19篇 |
1988年 | 5篇 |
1987年 | 8篇 |
1986年 | 4篇 |
1985年 | 5篇 |
1984年 | 9篇 |
1983年 | 11篇 |
1982年 | 4篇 |
1981年 | 7篇 |
1980年 | 8篇 |
1977年 | 5篇 |
1974年 | 5篇 |
1948年 | 3篇 |
1852年 | 3篇 |
1850年 | 3篇 |
排序方式: 共有2221条查询结果,搜索用时 0 毫秒
151.
John Andrew Ouligian 《Public Library Quarterly》2018,37(2):127-138
ABSTRACTThe Harwood Institute arrived in Youngstown, Ohio, in 1999; and today, over 18 years later, its teachings have made a profound effect upon the city. The Youngstown Public Library, through the leadership of Carlton Sears and Heidi Daniel, has wholeheartedly embraced the methods and ideology of the Harwood Institute, helping to reinvigorate and power a city working its way back to prosperity. 相似文献
152.
Andrew Post J. Michio Clark D. G. E. Robertson T. Blaine Hoshizaki Michael D. Gilchrist 《Sports Engineering》2017,20(2):111-119
Brain injury research in sport employs a variety of physical models equipped with accelerometers. These acceleration signals are commonly processed using filters. The purpose of this research was to determine the effect of applying filters with different cutoff frequencies to the acceleration signals used as input for finite element modeling of the brain. Signals were generated from reconstructions of concussion events from American football and ice hockey in the laboratory using a Hybrid III headform. The resulting acceleration signals were used as input for the University College Dublin Brain Trauma Model after being processed with filters. The results indicated that using a filter with a cutoff of 300 Hz or higher had little effect on the resulting strain measures. In some cases there was some effect of the filters on the peak linear (8–30g) and rotational measures (1000–4000 rad/s2), but little effect on the finite element strain result (approximately 2–6 %). The short duration and high magnitude accelerations, such as the puck impact, were most affected by the cutoff frequency of different filters. 相似文献
153.
Andrew Martin 《British Journal of Special Education》2006,33(2):68-75
In this article, Andrew Martin, deputy headteacher at Greenside School in Stevenage, provides an outline of the development of the P scales as an assessment tool for pupils working below Level 1 of the National Curriculum. He recounts the difficulties his school found in using P scales to track pupil progress from year to year and describes and evaluates a computer package which he devised in order to fulfil this function. He goes on to discuss current issues in the use of P scales, many of which were highlighted through use of the computer package. These issues include inconsistency in the use of the P scales; variations in pupil profiles; difficulties over making 'best fit' judgements; the need for moderation; and relationships with other curriculum and assessment systems in the school years and in the Foundation Stage. Andrew Martin closes his article with a call for consistency in approaches to assessment, particularly in view of the fact that P scale assessments are to be collected as part of statutory end of key stage data collection arrangements in future. 相似文献
154.
155.
156.
157.
158.
Andrew S. Tanenbaum 《Information processing & management》1983,19(1):62
159.
160.