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   11321篇
  免费   100篇
  国内免费   11篇
教育   7278篇
科学研究   2112篇
各国文化   80篇
体育   804篇
综合类   5篇
文化理论   72篇
信息传播   1081篇
  2021年   101篇
  2020年   143篇
  2019年   224篇
  2018年   280篇
  2017年   261篇
  2016年   207篇
  2015年   151篇
  2014年   201篇
  2013年   2026篇
  2012年   229篇
  2011年   210篇
  2010年   192篇
  2009年   174篇
  2008年   175篇
  2007年   181篇
  2006年   148篇
  2005年   151篇
  2004年   140篇
  2003年   136篇
  2002年   133篇
  2001年   170篇
  2000年   181篇
  1999年   168篇
  1998年   82篇
  1997年   91篇
  1996年   119篇
  1995年   81篇
  1994年   95篇
  1993年   94篇
  1992年   136篇
  1991年   145篇
  1990年   145篇
  1989年   166篇
  1988年   120篇
  1987年   116篇
  1986年   160篇
  1985年   153篇
  1984年   130篇
  1983年   128篇
  1982年   114篇
  1981年   94篇
  1980年   104篇
  1979年   138篇
  1978年   119篇
  1977年   104篇
  1976年   101篇
  1974年   110篇
  1973年   92篇
  1972年   84篇
  1971年   108篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
The value that willed body donors provide to medical education is priceless. Their precious gift helps to teach anatomy, spatial relationships between morphological structures, anatomical variation, and professionalism to medical students in a way that plastic models, podcasts, and lectures cannot. They are also an important resource for medical research and a wide variety of postgraduate training opportunities. While many body donation programs throughout the world are nonprofit organizations, there are body donation companies in the United States that sell donors for-profit. These “body brokers” have accumulated large profits from this business. It is incongruous that others would profit from such a priceless, freely donated gift. To prevent this incongruity, it is proposed that the international anatomical community develop a normative culture (a bioethos) for body donation programs. This would involve the conscious and systematic development of ethical principles for the day-to-day policies and practices of institutions that collect and use human bodies. With the development of this bioethos, a cultural shift in how donors are treated would occur and, over time, this would become the normal practice. These principles would become fundamental and foundational for the procurement and use of priceless human tissues.  相似文献   
2.
Although there has been a great deal of research into Collaborative Information Retrieval (CIR) and Collaborative Information Seeking (CIS), the majority has assumed that team members have the same level of unrestricted access to underlying information. However, observations from different domains (e.g. healthcare, business, etc.) have suggested that collaboration sometimes involves people with differing levels of access to underlying information. This type of scenario has been referred to as Multi-Level Collaborative Information Retrieval (MLCIR). To the best of our knowledge, no studies have been conducted to investigate the effect of awareness, an existing CIR/CIS concept, on MLCIR. To address this gap in current knowledge, we conducted two separate user studies using a total of 5 different collaborative search interfaces and 3 information access scenarios. A number of Information Retrieval (IR), CIS and CIR evaluation metrics, as well as questionnaires were used to compare the interfaces. Design interviews were also conducted after evaluations to obtain qualitative feedback from participants. Results suggested that query properties such as time spent on query, query popularity and query effectiveness could allow users to obtain information about team's search performance and implicitly suggest better queries without disclosing sensitive data. Besides, having access to a history of intersecting viewed, relevant and bookmarked documents could provide similar positive effect as query properties. Also, it was found that being able to easily identify different team members and their actions is important for users in MLCIR. Based on our findings, we provide important design recommendations to help develop new CIR and MLCIR interfaces.  相似文献   
3.
4.
5.
6.
7.
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