首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   706篇
  免费   6篇
教育   552篇
科学研究   24篇
各国文化   14篇
体育   37篇
文化理论   10篇
信息传播   75篇
  2022年   7篇
  2021年   4篇
  2020年   14篇
  2019年   28篇
  2018年   34篇
  2017年   20篇
  2016年   21篇
  2015年   11篇
  2014年   18篇
  2013年   159篇
  2012年   13篇
  2011年   12篇
  2010年   19篇
  2009年   4篇
  2008年   14篇
  2007年   16篇
  2006年   16篇
  2005年   14篇
  2004年   14篇
  2003年   14篇
  2002年   12篇
  2001年   18篇
  2000年   13篇
  1999年   22篇
  1998年   10篇
  1997年   15篇
  1996年   12篇
  1995年   15篇
  1994年   9篇
  1993年   9篇
  1992年   10篇
  1991年   9篇
  1990年   10篇
  1989年   12篇
  1988年   6篇
  1987年   13篇
  1986年   2篇
  1985年   10篇
  1984年   4篇
  1983年   11篇
  1982年   7篇
  1981年   6篇
  1980年   3篇
  1979年   5篇
  1978年   2篇
  1977年   2篇
  1973年   2篇
  1972年   2篇
  1931年   1篇
  1860年   2篇
排序方式: 共有712条查询结果,搜索用时 9 毫秒
161.
162.
163.
Abstract

In Great Britain and the United States common developmental issues have resulted in the evolution of two very different models of school library provision. In the United States, school libraries are integrated media centers, separate from public library influence, staffed by specialists with dual training in teaching and librarianship, and dedicated to an educational mission. British school libraries are contested terrain with two patterns of staffing, support by Public Library Services, and incomplete formulation of mission and rationale. This article discusses five factors which have facilitated or retarded school library development in the two countries (standards, staffing and certification, government support, rationale, professionalization) and generalizes about development factors and the successful promotion of school libraries.  相似文献   
164.
165.
Skin and core tissue cooling modulates skeletal muscle oxygenation at rest. Whether tissue cooling also influences the skeletal muscle deoxygenation response during exercise is unclear. We evaluated the effects of skin and core tissue cooling on skeletal muscle blood volume and deoxygenation during sustained walking and running. Eleven male participants walked or ran six times on a treadmill for 60 min in ambient temperatures of 22°C (Neutral), 0°C for skin cooling (Cold 1), and at 0°C following a core and skin cooling protocol (Cold 2). Difference between oxy/deoxygenated haemoglobin ([diffHb]: deoxygenation index) and total haemoglobin content ([tHb]: total blood volume) in the vastus lateralis (VL) muscle was measured continuously. During walking, lower [tHb] was observed at 1 min in Cold 1 and Cold 2 vs. Neutral (P?0.05). Lower [diffHb] was seen at 1 and 10 min in Cold 2 vs. Neutral by 13.5 ± 1.2 µM and 15.3 ± 1.4 µM and Cold 1 by 10.4 ± 3.1 µM and 11.1 ± 4.1 µM, respectively (P?0.05). During running, [tHb] was lower in Cold 2 vs. Neutral at 10 min only (P = 0.004). [diffHb] was lower at 1 min in Cold 2 by 11.3 ± 3.1 µM compared to Neutral and by 13.5 ± 2.8 µM compared to Cold 1 (P?0.001). Core tissue cooling, prior to exercise, induced greater deoxygenation of the VL muscle during the early stages of exercise, irrespective of changes in blood volume. Skin cooling alone, however, did not influence deoxygenation of the VL during exercise.  相似文献   
166.
Previous motor learning studies examining the effects of practicing to catch one-handed under varying informational constraints on subsequent skill acquisition are equivocal, perhaps due to the use of relatively inexperienced adult participants. Ecological theory predicts that directing the learner's search for information in the perceptual-motor workspace can enhance skill acquisition. This study manipulated visual informational constraints on novice children (ages 9-10 years) learning to catch one-handed. A crossover transfer design was implemented in which one group acted as controls while two other groups practiced either without visual restrictions before transferring to full vision, or vice versa. The data indicated that learners forced to seek additional information sources under restricted viewing conditions demonstrated a greater positive, accumulative residual effect on acquiring a catching skill. The findings contradict current work on the specificity of practice hypothesis and suggest that varying visual informational constraints to encourage exploratory practice may represent a significant pedagogical approach to motor learning in sport.  相似文献   
167.
168.
We address the question of the quality of movies produced between 1950 and 1970. A first outcome of our analysis is that the quality assessments made during the Cannes Festival, and to a lesser degree, by the U.S. Academy are short-lasting. In contrast to this, consumers seem consistent over time. There is, however, one issue on which experts agree as well as consumers: American movies dominate both in terms of commercial success and in terms of quality. There is less agreement, and sometimes there is even dissent concerning other dimensions. This does not come as a surprise and merely indicates that there is hardly a common yardstick along which the quality of a movie can be measured. Therefore, decomposing a work of art into quantifiable characteristics – even in a subjective but possibly unanimous way – would make it possible to explain the divergences between audiences and changes of appreciation over time.  相似文献   
169.
Attendant to the changing profile of the labor pool are shifts in norms and expectations that complicate worker recruitment, hiring, and retention. As labor pool, economic, and organizational characteristics change, two issues emerge: first, the growing need to efficiently coordinate available workers with the work that needs to be done, and second, strategies for organizations to use need to be developed. Leontiefs Input/Output Theory has been used to illustrate issues related to coordination of labor, and two pre-employment tests have been studied to determine the effectiveness of pre-employment testing strategies. Pre-employment test scores obtained in an expanding contract electronics manufacturing firm have been analyzed to determine the relationships that may exist between test scores and employee success. Success has been defined as performance and retention. Multiple regression and discriminant analyses revealed several statistically significant results, including a relationship between Working Safety-test scores and performance, and Job Candidate Profile scores and retention. While interesting in and of themselves, the results further suggest that variables exist, other than those studied, that arc important to the selection of successful employees.  相似文献   
170.
德国国家图书馆、美国国会图书馆和OCLC联机计算机图书馆中心联合开发了一个个人名称的虚拟国际规范文档(VIAF),它连接世界各国国家书目机构的规范记录,并免费提供网上检索,以证明自动连接不同国家规范文档的规范记录的可行性和优点.美国国会图书馆和德国国家图书馆的规范文档和书目文档被用来创建初始的VIAF,其中包括600多万个名称和50多万个连接.该项目的一个关键点是利用规范记录和其对应书目记录的信息开发自动名称匹配算法.该项目显示了用算法建立不同国家规范文档的个人名称之间连接的实用性.VIAF项目的长远目标是将许多国家图书馆和其他重要来源的规范名称结合起来,形成一个共享的全球规范服务.参考文献3.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号