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   141篇
  免费   7篇
管理学   3篇
人口学   3篇
丛书文集   12篇
理论方法论   32篇
综合类   53篇
社会学   39篇
统计学   6篇
  2023年   3篇
  2021年   4篇
  2020年   5篇
  2019年   10篇
  2018年   10篇
  2017年   7篇
  2016年   8篇
  2015年   5篇
  2014年   3篇
  2013年   12篇
  2012年   6篇
  2011年   3篇
  2010年   7篇
  2009年   5篇
  2007年   4篇
  2006年   6篇
  2005年   4篇
  2004年   5篇
  2003年   9篇
  2002年   6篇
  2001年   6篇
  2000年   4篇
  1998年   3篇
  1997年   3篇
  1996年   2篇
  1995年   3篇
  1994年   2篇
  1992年   1篇
  1990年   2篇
排序方式: 共有148条查询结果,搜索用时 15 毫秒
51.
A number of studies have established that politics has a role in shaping and implementing Social Safety Net Programmes (SSNPs) and, conversely, SSNPs also influence national or local politics. This study qualitatively analyzes the micro level political discourses of the Food‐For‐Work programme, one of the top 10 SSNPs in Bangladesh, using the concepts of access, institutions and agency under livelihood framework. The analysis of the findings reveals that the programme is not effective in terms of the stated objectives of reducing poverty, but rather serves the interest of political elites. Beneficiary access to the projects depends on categorical membership, ability to participate and gender, which lead the programme to be reduced to subsidized infrastructure projects.  相似文献   
52.
This contribution provides empirical answers to the question of how teaching-specific competencies develop during participation in an international student exchange programme. The quantitative analyses of this quasi-experimental study suggest that, generally speaking, no specific developments occur during an exchange experience. These findings contradict the majority of existing literature. Possible reasons for this divergence are discussed. The interpretation of the results suggests future research should focus on the key question of pre-conditions for productive exchange experiences.  相似文献   
53.
In particular research domains, the randomized control trial (RCT) is considered to be the only means for obtaining reliable estimates of the true impact of an intervention. However, an RCT design would often not be considered ethical, politically feasible, or appropriate for evaluating the impact of many policy, programme, or structural changes common in public health research. As such, researchers must use alternative yet robust research methods for determining the impact of such interventions. The evaluation of natural experiments (i.e. an intervention not controlled or manipulated by researchers), using various experimental and non-experimental design options can provide an alternative to the RCT. The following review highlights (a) the importance of evaluating natural experiments; (b) design considerations associated with evaluating natural experiments; (c) methods for reducing bias in natural experimental studies; and (d) the potential benefits of targeted systems to enable natural experiments in emerging priority domains moving forward.  相似文献   
54.
Using data from the Food and Agricultural Organization and some other sources, it was estimated that rapid population growth in countries with an initial average calorie availability of below 2800 per head inhibited improvements in food production and availability per head during the 1980s and early 1990s. There were statistically significant negative effects of population growth on the growth in the production of noncereal food crops, milk, and meat, and in total food production. Because net food imports and aid shipments of cereals responded similarly, rather than acting as compensatory factors, the development in total calorie availability per head was least satisfactory in countries with the most rapid growth. A rapid increase in the number of adults of working age appeared to be no less disadvantageous than an increase in the number of children or elderly. Weaker effects were found when the entire 1970-95 period was considered. There were few indications that poverty, illiteracy, or land or water scarcity made it particularly difficult to cope with a growing population.  相似文献   
55.
56.
With the increase in substance use by young people in recent years' there has been a growth in evidence‐based programs aimed at preventing this problem. This study aims to assess possible changes in family and parental dynamics among families taking part in a short (6‐session) universal program. These changes might act as protective factors for families in preventing substance use. A quasi‐experimental design was used' with pretest and posttest evaluations. The participating schools meeting the inclusion criteria were randomly assigned to the experimental or control group. The sample was made up of 16 experimental groups and 17 control groups' with the participation of 353 parents and 289 youths. The results confirm the strengthening of the families by improving the following key components of parenting: resilience' involvement' family conflicts' and positive parenting. Reinforcing parenting skills through a short program is a good strategy to take' ensuring high levels of adherence (86.40% retention of the initial sample). Hence future universal prevention programs must not just set their sights on high levels of effectiveness' but also on efficiency.  相似文献   
57.
本文利用BASIC语言编制了一套应用程序,可利用光切显微镜实测的数据,得到国家标准规定的六个参数。  相似文献   
58.
现代网络远程教育技术及其实现   总被引:6,自引:0,他引:6  
随着计算机及网络技术、视讯技术、多媒体技术的不断进步 ,使得利用卫星、ISDN、会议电视、互联网等设施进行现代远程教育成为可能 ,综合多项前沿技术手段的远程教育 ,具有良好的发展前景和重大的社会意义。在中国 ,大规模的现代远程教育正处于起步阶段 ,而各种适于网络教育的技术手段也在不断的探索过程中 ,力求从技术角度 ,较全面地探讨一下在现代远程教育中所运用的技术手段及其具体实现  相似文献   
59.
文章通过对农村传统扶贫价值观的检讨 ,认为权利扶贫是解决“三农”问题的基本途径 ,并以此为取向 ,对权利扶贫实然化的基本条件和相关制度以及权利扶贫对农村社会现代权利型构的价值等进行了系统的探讨  相似文献   
60.
本文介绍了开环系统数控车床CAD软件系统的开发工作。其中包括零件图输入及零件图数据库建立与使用,计算机辅助编程软件环境、模块的建立,各模块的连接以及模块功能扩展方法。  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