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   147篇
  免费   0篇
各国政治   1篇
工人农民   24篇
世界政治   6篇
外交国际关系   7篇
法律   92篇
中国政治   4篇
政治理论   13篇
  2023年   1篇
  2022年   2篇
  2021年   1篇
  2020年   3篇
  2019年   5篇
  2018年   3篇
  2017年   3篇
  2016年   8篇
  2015年   5篇
  2014年   8篇
  2013年   22篇
  2012年   4篇
  2011年   8篇
  2010年   3篇
  2009年   3篇
  2008年   8篇
  2007年   5篇
  2006年   5篇
  2005年   6篇
  2004年   8篇
  2003年   1篇
  2002年   2篇
  2001年   5篇
  1999年   3篇
  1998年   2篇
  1997年   2篇
  1996年   2篇
  1995年   1篇
  1993年   1篇
  1992年   3篇
  1991年   3篇
  1989年   1篇
  1988年   1篇
  1984年   2篇
  1983年   1篇
  1981年   2篇
  1980年   1篇
  1979年   1篇
  1974年   1篇
  1973年   1篇
排序方式: 共有147条查询结果,搜索用时 15 毫秒
141.
142.
143.
144.
This study capitalizes on a natural experiment in Montgomery County, Maryland, where low-income applicant families are randomly assigned to public housing that is either (a) clustered within seven public housing developments or (b) scattered into market-rate subdivisions via the county's inclusionary zoning policy. Through a survey of 453 public housing residents, we find that adults who lived in scattered public housing reported a lower proportion of low-socioeconomic status (SES) social ties generally and a lower proportion of low-SES neighbors specifically in their social networks. They also counted more high-SES individuals in their social networks, and this effect was related to the amount of time they lived in the neighborhood. Living in scattered public housing had no adverse effect on feelings of neighborhood belonging or satisfaction. The socioeconomic composition of respondents' social networks was associated with two health outcomes for respondents (smoking and depression) and modestly associated with respondents' household income.  相似文献   
145.
146.
Crime, Law and Social Change - Justice as a concept has permeated sociolegal scholarship in the U.S. since the founding of Law and Society as a field in the mid 1960s. Much of this scholarship has...  相似文献   
147.
Image segmentation is a fundamental precursor to quantitative image analysis. At present, no standardised methodology exists for segmenting images of fluorescent proxies for trace evidence. Experiments evaluated (i) whether manual segmentation is reproducible within and between examiners (with three participants repeatedly tracing three images) (ii) whether manually defining a threshold level offers accurate and reproducible results (with 20 examiners segmenting 10 images), and (iii) whether a global thresholding algorithm might perform with similar accuracy, while offering improved reproducibility and efficiency (16 algorithms tested). Statistically significant differences were seen between examiners’ traced outputs. Manually thresholding produced good accuracy on average (within ±1% of the expected values), but poor reproducibility (with multiple outliers). Three algorithms (Yen, MaxEntropy, and RenyiEntropy) offered similar accuracy, with improved reproducibility and efficiency. Together, these findings suggest that appropriate algorithms could perform thresholding tasks as part of a robust workflow for reconstruction studies employing fluorescent proxies for trace evidence.  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