全文获取类型
收费全文 | 4424篇 |
免费 | 73篇 |
国内免费 | 3篇 |
专业分类
教育 | 3145篇 |
科学研究 | 363篇 |
各国文化 | 66篇 |
体育 | 394篇 |
综合类 | 1篇 |
文化理论 | 85篇 |
信息传播 | 446篇 |
出版年
2022年 | 30篇 |
2021年 | 34篇 |
2020年 | 64篇 |
2019年 | 131篇 |
2018年 | 139篇 |
2017年 | 170篇 |
2016年 | 144篇 |
2015年 | 96篇 |
2014年 | 131篇 |
2013年 | 1056篇 |
2012年 | 100篇 |
2011年 | 111篇 |
2010年 | 101篇 |
2009年 | 101篇 |
2008年 | 129篇 |
2007年 | 99篇 |
2006年 | 82篇 |
2005年 | 81篇 |
2004年 | 82篇 |
2003年 | 73篇 |
2002年 | 78篇 |
2001年 | 67篇 |
2000年 | 79篇 |
1999年 | 59篇 |
1998年 | 42篇 |
1997年 | 37篇 |
1996年 | 42篇 |
1995年 | 46篇 |
1994年 | 41篇 |
1993年 | 58篇 |
1992年 | 61篇 |
1991年 | 53篇 |
1990年 | 43篇 |
1989年 | 39篇 |
1988年 | 36篇 |
1987年 | 42篇 |
1986年 | 41篇 |
1985年 | 40篇 |
1984年 | 29篇 |
1983年 | 24篇 |
1982年 | 34篇 |
1981年 | 35篇 |
1980年 | 30篇 |
1979年 | 38篇 |
1978年 | 39篇 |
1977年 | 29篇 |
1976年 | 33篇 |
1975年 | 21篇 |
1974年 | 26篇 |
1973年 | 17篇 |
排序方式: 共有4500条查询结果,搜索用时 15 毫秒
1.
ABSTRACT Full three-dimensional movements and external moments in golfers’ knees and the possible involvement in injuries have not been evaluated using motion capture at high sample frequencies. This study measured joint angles and external moments around the three anatomical axes in both knees of 10 professional golfers performing golf drives whilst standing on two force plates in a motion capture laboratory. Significant differences were found in the knee joint moments between the lead and trail limbs for the peak values and throughout all stages during the swing phase. A significantly higher net abduction moment impulse was seen in the trail limb compared with the lead limb (?0.518 vs. ?0.135 Nms.kg?1), indicating greater loading over the whole swing, which could contribute to knee lateral compartment or anterior cruciate ligament injuries. A significant correlation (r = ?0.85) between clubhead speed at ball contact and maximum joint moment was found, with the largest correlations being found for joint moments at the top of the backswing event and at the end of the follow-through. Therefore, although knee moments can contribute to high clubhead speeds, the large moments and impulses suggest that they may also contribute to chronic knee injuries or exacerbate existing conditions. 相似文献
2.
Abstract This paper provides a methodology to study the characteristics of the research output from a university department. The faculty publications and their cited references over a 10-year period were used as the basis for this study to identify their publishing patterns and the types of material they are publishing; a core set of journals and other resources they are publishing in and citing over this period; the characteristics of the journals in which they publish and cite; the degree of openness of their publications and their citation advantage; and the age of resources that are referenced. 相似文献
3.
Edward A. Holdaway 《Higher Education Quarterly》1993,47(3):237-258
Many western countries are paying increasing attention to the organization and administration of graduate studies. Such attention has developed from primary concerns about completion times, completion percentages, programme quality, and student quality, as well as secondary concerns about supervisors, funding, coursework, inter-organizational co-operation, and policies and practices of both universities and research councils. Using information about British graduate programmes as a basis, the article presents policy issues related to research councils, funding councils, and control, followed by discussion of the themes of the nature of programmes, supervision and evaluation, completion time, quality, and innovation. The final sections address several concerns and offer some suggestions. 相似文献
4.
5.
6.
7.
Mike Cass Dennis Cates Michelle Smith Cynthia Jackson 《Learning disabilities research & practice》2003,18(2):112-120
Abstract. A multiple baseline design was employed to test the effect of manipulative instruction on the perimeter and area problem‐solving performance of middle and high school students who had been diagnosed with LD in the area of mathematics. Modeling, prompting/guided practice, and independent practice in conjunction with manipulative training were employed to teach both perimeter and area problem‐solving skills. Analysis of data revealed that the students rapidly acquired the problem‐solving‐skills, maintained these skills over a two‐month period, and transferred these skills to a paper and pencil problem‐solving format. This research extends previous findings by revealing that use of concrete manipulatives promotes the long‐term maintenance of skills. 相似文献
8.
9.
10.