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   21627篇
  免费   230篇
  国内免费   18篇
教育   14262篇
科学研究   3223篇
各国文化   430篇
体育   1684篇
综合类   9篇
文化理论   179篇
信息传播   2088篇
  2021年   222篇
  2020年   329篇
  2019年   517篇
  2018年   655篇
  2017年   637篇
  2016年   556篇
  2015年   375篇
  2014年   470篇
  2013年   3902篇
  2012年   471篇
  2011年   431篇
  2010年   380篇
  2009年   365篇
  2008年   413篇
  2007年   409篇
  2006年   343篇
  2005年   321篇
  2004年   326篇
  2003年   259篇
  2002年   256篇
  2001年   320篇
  2000年   352篇
  1999年   312篇
  1998年   168篇
  1997年   175篇
  1996年   188篇
  1995年   147篇
  1994年   167篇
  1993年   177篇
  1992年   256篇
  1991年   281篇
  1990年   283篇
  1989年   309篇
  1988年   231篇
  1987年   227篇
  1986年   263篇
  1985年   301篇
  1984年   242篇
  1983年   239篇
  1982年   205篇
  1981年   170篇
  1980年   187篇
  1979年   271篇
  1978年   204篇
  1977年   188篇
  1976年   170篇
  1975年   152篇
  1974年   193篇
  1973年   166篇
  1971年   175篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Editorial     
B. Sury 《Resonance》2018,23(7):723-725
  相似文献   
2.
3.
ABSTRACT

This article offers a textual analysis and semiotic reading of the Rich Kids of Tehran's (RKOT’s) Instagram page. Contributing to scholarship on Iranian youth media practices, this article interrogates how the RKOT navigate urban and rural space to engage in everyday processes of resistance against global and local systemic oppression. Grounding their visual representations on Instagram in historical and cultural context, the author questions how and when quotidian actions are transformed into political transgressions when posted on social media. This article emphasizes the RKOT's agency in shaping their brand by analyzing representations of gender performance, intertextuality, and national identity on Instagram.  相似文献   
4.
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   
5.
ABSTRACT

This paper aims to analyse the initiatives undertaken by some immigrant communities residing in Latin America to record their mobilisation around the First World War. After the armistice, European communities in Argentina, Bolivia, Brazil, Chile, Mexico, Paraguay, Peru, Uruguay and other countries gathered detailed information about their activities during the conflict, published as profusely illustrated books of remembrance, offered to their governments as proof of their loyalty. The article intends to establish the peculiar nature of these publications as records of the war effort, and analyse the agents and processes of their elaboration, and their role as commemorative but also as archival documents.  相似文献   
6.
In the IR field it is clear that the value of a system depends on the cost and benefit profiles of its users. It would seem obvious that different users would prefer different systems. In the TREC-9 filtering track, systems are evaluated by a utility measure specifying a given cost and benefit. However, in the study of decision systems it is known that, in some cases, one system may be unconditionally better than another. In this paper we employ a decision theoretic approach to find conditions under which an Information Filtering (IF) system is unconditionally superior to another for all users regardless of their cost and benefit profiles.It is well known that if two IF systems have equal precision the system with better recall will be preferred by all users. Similarly, with equal recall, better precision is universally preferred. We confirm these known results and discover an unexpected dominance relation in which a system with lower recall will be universally preferred provided its precision is sufficiently higher.  相似文献   
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