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   601篇
  免费   21篇
  622篇
  2023年   5篇
  2021年   3篇
  2020年   18篇
  2019年   27篇
  2018年   23篇
  2017年   28篇
  2016年   22篇
  2015年   17篇
  2014年   20篇
  2013年   152篇
  2012年   18篇
  2011年   17篇
  2010年   20篇
  2009年   18篇
  2008年   16篇
  2007年   25篇
  2006年   12篇
  2005年   10篇
  2004年   12篇
  2003年   15篇
  2002年   12篇
  2001年   8篇
  2000年   8篇
  1999年   6篇
  1998年   7篇
  1997年   11篇
  1996年   9篇
  1995年   5篇
  1994年   5篇
  1993年   3篇
  1992年   6篇
  1991年   4篇
  1990年   7篇
  1989年   3篇
  1987年   3篇
  1986年   4篇
  1985年   3篇
  1984年   2篇
  1983年   7篇
  1982年   3篇
  1980年   3篇
  1979年   6篇
  1978年   4篇
  1977年   1篇
  1976年   4篇
  1975年   2篇
  1974年   3篇
  1971年   1篇
  1969年   1篇
  1957年   1篇
排序方式: 共有622条查询结果,搜索用时 0 毫秒
41.
Smallpox inoculation was one of the great discoveries of the 18th century and has been written into the grand narrative of medical progress, describing the taming of epidemic disease. Setting the perspective of progress aside, the article explores how this medical innovation was situated in 18th-century society and culture. The aim is to investigate how medical practice was intertwined with social structure and cultural patterns. The article takes its case from a book published in Copenhagen in 1766 by Professor C. F. Rottb?ll, former Head Physician of the Royal Inoculation House in Copenhagen. Being the first medical treatise on inoculation in Denmark-Norway, the book also has a historical section followed by a collection of reports and letters written by a number of other authors from various parts of the kingdom. Through close reading, the article explores how the introduction of the new technique was described in the texts. The reports were written to present practice and discuss cases. In doing so, they also presented a variety of other concerns so that a diversity of aims and intentions are added to the medical ones. The social and rhetorical strategies employed illuminate social ambition and systems of patronage, as well as understandings of history and of truth.  相似文献   
42.
Abstract

The collapse of empires is exceedingly difficult to understand. The author examined the distribution of imperial lifetimes using a data set that spans more than three millennia and found that it conforms to a memoryless exponential distribution in which the rate of collapse of an empire is independent of its age. Comparing this distribution to similar lifetime distributions of other complex systems—specifically, biological species and corporate firms—the author explores the reasons behind their lifetime distributions and how this approach can yield insights into empires.  相似文献   
43.
44.
45.
46.
47.
As technologies grow in complexity, firms often target their internal R&D resources on core competencies and utilize outside sources for supporting knowledge and technology. Where do firms turn to find such resources? This paper reports the perceptions of technology transfer managers in United States manufacturing firms toward federal and university labs and identifies the types of farms that are better positioned to utilize externally available technological resources. Based on replies from research-intensive companies within the United States, the authors find that larger firms with high research and development (R&D) budgets tend to ascribe greater significance to external sources than do smaller ones. Also, companies spending over $500 million in R&D rank universities the most significant external source of knowledge, followed by V S.-based firms, and then foreign firms.  相似文献   
48.
The Maisin women of northeastern Papua New Guinea are among the last coastal Papuans to tattoo their faces. This article first describes the techniques and social process of Maisin tattooing. We then examine the resilience of the custom in light of changes in puberty rites and notions of gender. We argue that these contexts have lost their cultural salience as a result of the Maisins' incorporation into the larger Papua New Guinea society. Tattooing has acquired new significance as a marker of cultural identity in a multicultural setting and as a sign of the Maisin people's commercial success as makers of indigenous art.  相似文献   
49.
The aim of the article is to examine how the population size of voluntary associations affects the process through which the public's issue priorities are translated into policy priorities. We conduct a time series analysis of political attention in executive and legislative agendas at the U.S. federal level in the period 1971–2001, covering all issues addressed by the U.S. government. We show that the number of voluntary associations in a policy area has a positive conditioning effect on the link between public priorities and attention for the president's State of the Union Address. However, our results do not find a positive effect for voluntary associations at later stages of the policy cycle, which experience a higher degree of institutional friction. The findings underline the importance of distinguishing between different stages of policymaking when considering the impact of voluntary associations on dynamic agenda responsiveness.  相似文献   
50.
Joe Shaw  Mark Graham 《对极》2017,49(4):907-927
Henri Lefebvre talked of the “right to the city” alongside a right to information. As the urban environment becomes increasingly layered by abstract digital representation, Lefebvre's broader theory warrants application to the digital age. Through considering what is entailed by the urbanization of information, this paper examines the problems and implications of any “informational right to the city”. In directing Tony Benn's five questions of power towards Google, arguably the world's most powerful mediator of information, this paper exposes processes that occur when geographic information is mediated by powerful digital monopolies. We argue that Google currently occupies a dominant share of any informational right to the city. In the spirit of Benn's final question—“How do we get rid of you?”—the paper seeks to apply post‐political theory in exploring a path to the possibility of more just information geographies.  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