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   345篇
  免费   7篇
教育   259篇
科学研究   12篇
各国文化   3篇
体育   37篇
文化理论   12篇
信息传播   29篇
  2022年   2篇
  2021年   2篇
  2020年   8篇
  2019年   10篇
  2018年   11篇
  2017年   12篇
  2016年   10篇
  2015年   10篇
  2014年   12篇
  2013年   65篇
  2012年   12篇
  2011年   11篇
  2010年   11篇
  2009年   9篇
  2008年   11篇
  2007年   10篇
  2006年   21篇
  2005年   8篇
  2004年   10篇
  2003年   3篇
  2002年   5篇
  2001年   3篇
  2000年   2篇
  1999年   8篇
  1998年   7篇
  1997年   2篇
  1996年   3篇
  1995年   6篇
  1994年   3篇
  1992年   4篇
  1991年   2篇
  1990年   3篇
  1989年   2篇
  1988年   3篇
  1986年   3篇
  1985年   3篇
  1984年   2篇
  1983年   3篇
  1982年   2篇
  1981年   4篇
  1980年   4篇
  1979年   4篇
  1978年   4篇
  1976年   3篇
  1973年   2篇
  1972年   2篇
  1968年   3篇
  1958年   1篇
  1955年   2篇
  1937年   1篇
排序方式: 共有352条查询结果,搜索用时 15 毫秒
1.
2.
3.
Software engineering education can be viewed as a challenging task. Computer science students tend to focus on the programming aspects of a project, and take a “hacking approach” to completing a project, rather than viewing the process. Our course material includes teaching the Personal Software Process (PSP). Students are required to produce defect and effort metrics, as well as project summary reports. Tools to assist information recording and production of reports are difficult for students to access. The cost in terms of financial and learning time is usually too high at the educational level to justify using commercial tools that are available for the professional software engineer. We have developed a tool—Personal Assistant for Software Engineers—to aid students in the learning of the PSP. The tool has been successfully used in four subjects for a semester. Following feedback and evaluation, it has been redesigned, and is currently in stage two. The tool has been useful for students, and has automated the previous manual process of producing time and defect reports, along with project summaries, thus allowing them to focus on the meaning of the information.  相似文献   
4.

Framing this essay as a preface to a return to the field in order to collect more data for her study of the older, white southern women of her hometown, this researcher uses Laurel Richardson's (1994) concept of ''writing as a method of inquiry'' in order to revisit some of the places in which she has already done field work. By employing Deleuze and Guattari's (1980 1987) image of the nomad deterritorializing space, she revisits some of those spaces- mental space, the space of the text, and the space of theory- in order to work out of the failure of her received understanding of fieldwork and to think differently about the spaces and places in which her research takes place.  相似文献   
5.
Stereotypes, prejudice, and discrimination against the elderly (ageism) may manifest themselves in children at an early age. However, the factors influencing this phenomenon are not well known. Using both explicit and open-ended questions, this study analyzed the influence of personal and familial parameters on the views of 1,151 seven- to sixteen-year-old Belgian children and adolescents on the elderly. Four factors were found to affect these views: gender (girls had slightly more positive views than boys), age (ageism was lowest in 10- to 12-year-old, reminiscent of other forms of stereotypes and cognitive developmental theories), grandparents’ health, and most importantly, quality of contact with grandparents (very good and good contacts correlated with more favorable feelings toward the elderly, especially in children with frequent contacts).  相似文献   
6.
During the thirteenth century, competition among the Italian merchants in Alexandria increased and each community sought wider trading privileges. Access to Alexandria's markets was an important addition to Venetian economic power, complementing the contemporary Venetian presence in Aleppo, in Acre and other Frankish ports, and in Constantinople after the fourth crusade in 1204. Venice differed from Pisa and Genoa in the thirteenth century because it was the only Italian merchant city that had signed four trade agreements with the sultans of Egypt. The Venetian treaties with the sultans formed the base of developing the Venetian maritime trade with Alexandria. They obtained privileges that allowed them to exercise commercial supremacy in the eastern Mediterranean. Unlike the other Italian communities settled in the sultan's lands, the Venetian merchants' privileges remained fixed and continued through the fourteenth and fifteenth centuries. This article aims to study and analyse commercial and diplomatic relations between Venice and the sultans, the Venetian merchants' privileges and their political and juridical status in Egypt.  相似文献   
7.
‘A tribute to Dr J. Rogge’ aims to systematically review muscle activity and muscle fatigue during sustained submaximal quasi-isometric knee extension exercise (hiking) related to Olympic dinghy sailing as a tribute to Dr Rogge’s merits in the world of sports. Dr Jacques Rogge is not only the former President of the International Olympic Committee, he was also an orthopaedic surgeon and a keen sailor, competing at three Olympic Games. In 1972, in fulfilment of the requirements for the degree of Master in Sports Medicine, he was the first who studied a sailors’ muscle activity by means of invasive needle electromyography (EMG) during a specific sailing technique (hiking) on a self-constructed sailing ergometer. Hiking is a bilateral and multi-joint submaximal quasi-isometric movement which dinghy sailors use to optimize boat speed and to prevent the boat from capsizing. Large stresses are generated in the anterior muscles that cross the knee and hip joint, mainly employing the quadriceps at an intensity of 30–40% maximal voluntary contraction (MVC), sometimes exceeding 100% MVC. Better sailing level is partially determined by a lower rate of neuromuscular fatigue during hiking and for ≈60% predicted by a higher maximal isometric quadriceps strength. Although useful in exercise testing, prediction of hiking endurance capacity based on the changes in surface EMG in thigh and trunk muscles during a hiking maintenance task is not reliable. This could probably be explained by the varying exercise intensity and joint angles, and the great number of muscles and joints involved in hiking.

Highlights

  • Dr Jacques Rogge, former president of the International Olympic Committee and Olympic Finn sailor, was the first to study muscle activity during sailing using invasive needle EMG to obtain his Master degree in Sports Medicine at the Ghent University.

  • Hiking is a critical bilateral and multi-joint movement during dinghy racing, accounting for >60% of the total upwind leg time. Hiking generates large stresses in the anterior muscles that cross the knee and hip joint.

  • Hiking is considered as a quasi-isometric bilateral knee extension exercise. Muscle activity measurements during sailing, recorded by means of EMG, show a mean contraction intensity of 30-40% maximal voluntary contraction with peaks exceeding 100%.

  • Hiking performance is strongly related to the development of neuromuscular fatigue in the quadriceps muscle. Since maximal strength is an important determinant of neuromuscular fatigue during hiking, combined strength and endurance training should be incorporated in the training program of dinghy sailors.

  相似文献   
8.
9.
10.
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