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   834篇
  免费   40篇
各国政治   42篇
工人农民   104篇
世界政治   74篇
外交国际关系   35篇
法律   400篇
中国政治   11篇
政治理论   202篇
综合类   6篇
  2023年   7篇
  2022年   3篇
  2021年   11篇
  2020年   17篇
  2019年   19篇
  2018年   36篇
  2017年   43篇
  2016年   40篇
  2015年   29篇
  2014年   32篇
  2013年   131篇
  2012年   27篇
  2011年   27篇
  2010年   37篇
  2009年   29篇
  2008年   31篇
  2007年   31篇
  2006年   33篇
  2005年   20篇
  2004年   29篇
  2003年   27篇
  2002年   29篇
  2001年   11篇
  2000年   18篇
  1999年   15篇
  1998年   12篇
  1997年   11篇
  1996年   7篇
  1995年   11篇
  1994年   6篇
  1993年   9篇
  1992年   13篇
  1991年   6篇
  1990年   6篇
  1989年   5篇
  1988年   3篇
  1987年   3篇
  1986年   3篇
  1985年   7篇
  1984年   4篇
  1983年   6篇
  1982年   3篇
  1981年   4篇
  1980年   2篇
  1978年   2篇
  1977年   3篇
  1973年   2篇
  1968年   2篇
  1943年   1篇
  1934年   1篇
排序方式: 共有874条查询结果,搜索用时 15 毫秒
871.
The aims of this study were twofold: first, to identify the characteristics that distinguish neglected children from other children reported to youth protection services; and second, to assess the relative importance of each of these characteristics in the differentiation of such children. Researchers analyzed data from the Quebec Incidence Study (QIS), which documented all reports retained for in-depth assessment out of 4,774 reports filed with youth protection services over a 3-month period. Univariate and multivariate regression analyses examined variables on different levels to establish which of the factors linked to the phenomenon of neglect were most significant. Results indicate that neglected children tend to be younger than other reported children, and have a greater frequency of prior referrals and a greater number of learning and development problems; their parents have a greater tendency to have personal, economic, and social problems and childhood histories of maltreatment.
Chantal LavergneEmail:
  相似文献   
872.
To conceal criminal activity of a bioterrorist or agroterrorist, the site of pathogen generation is often treated with sterilants to kill the organisms and remove evidence. As dead organisms cannot be analyzed by culture, this study examined whether DNA from sterilant‐treated Bacillus cereus spores was viable for amplification. The spores were exposed to five common sterilants: bleach, Sterilox®, oxidizer foam (L‐Gel), a peroxyacid (Actril®), and formaldehyde vapor. The spores were inoculated on typical surfaces found in offices and laboratories to test for environmental effects. It was found that the surface influenced the efficiency of recovery of the organisms. The DNA isolated from the recovered spores was successfully detected using RT‐qPCR for all treatments except for formaldehyde, by amplifying the phosphatidylinositol phospholipase C and sphingomyelinase genes. The results demonstrated that evidence from sites treated with sterilants can still provide information on the uncultured organism, using DNA amplification.  相似文献   
873.
874.
Conflicted parental separation is associated with risks to safety and wellbeing for all family members. The Family Law DOORS (FL-DOORS; Detection of Overall Risk Screen) is a standardized screening framework to assist identification, evaluation, and response to family safety risks. The FL-DOORS has previously been validated in two large Australian samples (N = 6089) and found fit-for-purpose as an indicator of family violence and wellbeing risks in separated families. Now, using pilot data from a community mediation context, we examine its utility as a repeated measure for detecting change in safety and wellbeing over time. A pilot cohort of 67 parents engaged in a mediation service for parenting and/or property disputes completed the FL-DOORS at intake (T1) and approximately 8 weeks later (T2). We assessed T1-T2 change scores and correlations in change between variables and used MANOVA to determine if clusters of related scales discriminated change across time. Findings support the psychometric capacity of the FL-DOORS for use as a repeated measure in risk monitoring. We also note possible effects of this early screening process for reducing risk prior to engagement in mediation input. We discuss implementation utility for family law services to monitor change in risk type and magnitude over time.  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