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   1507篇
  免费   313篇
  2021年   16篇
  2020年   15篇
  2019年   111篇
  2018年   81篇
  2017年   82篇
  2016年   136篇
  2015年   87篇
  2014年   90篇
  2013年   321篇
  2012年   91篇
  2011年   107篇
  2010年   77篇
  2009年   56篇
  2008年   78篇
  2007年   69篇
  2006年   50篇
  2005年   21篇
  2004年   40篇
  2003年   37篇
  2002年   27篇
  2001年   23篇
  2000年   34篇
  1999年   6篇
  1998年   15篇
  1997年   21篇
  1996年   13篇
  1995年   17篇
  1994年   12篇
  1993年   5篇
  1992年   7篇
  1991年   2篇
  1990年   3篇
  1989年   5篇
  1988年   5篇
  1987年   5篇
  1986年   2篇
  1985年   6篇
  1984年   4篇
  1983年   4篇
  1982年   5篇
  1980年   5篇
  1979年   5篇
  1978年   3篇
  1977年   6篇
  1976年   3篇
  1975年   2篇
  1974年   3篇
  1969年   2篇
  1968年   1篇
  1951年   1篇
排序方式: 共有1820条查询结果,搜索用时 15 毫秒
71.
Quiet urban areas are places with low noise levels that can help people to support physical and mental wellness. This paper has two objectives: to identify quiet urban areas in Montreal and to check for the presence of environmental inequities in access to such areas for vulnerable groups (children, older people, low‐income individuals, and visible minorities). Using a GIS‐based methodology, 2,282 quiet urban areas were identified in Montreal. The results of a mixed effects logistic regression model analysis showed that there are no major inequities in access to quiet urban areas for the population groups studied. The analysis did, however, revealed substantial spatial disparities in terms of the distribution of quiet urban areas across the boroughs and municipalities examined.  相似文献   
72.
The paper analyses the emergence of the Artificial Intelligence (AI) cluster in Montreal and investigates two questions: (1) What are the different theoretical interpretations related to the emergence of industrial cluster? And (2) What are the factors underlying the emergence of the AI cluster in Montreal and to what extent have local and global factors been decisive in this respect? The AI cluster emerges through a process that brings into play the interaction between the local initial conditions and the birth of a new industry. Moreover, it also involves an interaction between the local and the global, which is supported by interactions with foreign actors located in different parts of the world.  相似文献   
73.
74.
75.
This paper investigates the role of women in anti‐racist campaigns against policing in post‐2011 England. It argues that imperial discourses about gender norms and respectability have helped to shape how race and crime are constituted in the contemporary period. Women's resistance to police racism has received scholarly attention from black feminists in North America; such attention has been less in Britain, particularly since the 1990s. While influential analyses of policing in Britain have deployed a post‐colonial lens, gender and women's resistance are rarely the primary focus. This paper significantly develops debates on gender, race and policing, by arguing that the colonial roots of race and gender norms are fundamental to conceptualising one of the key findings of the field research which informs this paper: that women lead almost every campaign against a black death in police custody in post‐2011 England. Drawing on semi‐structured interviews with activists, ethnographic observations at protests and scholar‐activist participation in campaigns against black deaths in custody, this paper demonstrates how 18th and 19th century imperial discourses on respectability and nation do not simply contextualise racialised policing in the contemporary period, but expose the racialised and gendered norms that legitimise racist policing in modern Britain.  相似文献   
76.
77.
78.
This paper analyzes the long‐term transformations of the occupational structure in 50 provinces of Spain with a view to ascertain the existence and assess the extent of employment polarization. The peculiar characteristics of this country, namely rigid labor markets and the relatively recent transition to democracy, make for an interesting addition to existing studies on this topic. In line with previous literature on other countries, we find a strong association between the decline of “routine” mid‐skill jobs and the expansion of low‐skill service employment as well as differential labor market outcomes by levels of formal education. Results are robust to various controls and instrumental variables that account for long‐term industry specialization. We also find a positive local multiplier effect of high‐skilled workers on the demand for nontradable service jobs.  相似文献   
79.
This review discusses recent challenges to the welfare state arising from the Great Recession (GR). The GR was a significant event for social policy analysts, as it tested the responsiveness of welfare systems in the midst of a recent trend toward austerity politics in advanced economies. Social policy changes were part of the toolkit advanced democracies used to respond to the GR, and the welfare state mitigated the consequences of the GR. However, a stark limitation of the social safety net in the United States was the failure to assist immigrant households. The nexus of immigration and social policy is likely to be a significant controversy as we consider the meaning of social citizenship.  相似文献   
80.
Travertine was one of ancient Egypt's most popular ornamental stones. Upon prolonged exposure to sunlight, the rock's translucent brownish calcite is bleached to nearly white. Ultraviolet and gamma irradiation experiments were undertaken to investigate the source of the brownish colour and the process by which it fades. It was found that the coloration results from the activation of colour centres by natural radioactivity within the rock, and that these colour centres are deactivated by the ultraviolet component of sunlight. The results also demonstrate that the original brownish colour of sun‐bleached, travertine objects can be restored by artificial gamma irradiation.  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