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   1580篇
  免费   70篇
各国政治   96篇
工人农民   63篇
世界政治   124篇
外交国际关系   105篇
法律   866篇
中国共产党   2篇
中国政治   18篇
政治理论   331篇
综合类   45篇
  2023年   12篇
  2022年   12篇
  2021年   17篇
  2020年   42篇
  2019年   47篇
  2018年   63篇
  2017年   72篇
  2016年   67篇
  2015年   44篇
  2014年   57篇
  2013年   262篇
  2012年   60篇
  2011年   67篇
  2010年   76篇
  2009年   62篇
  2008年   74篇
  2007年   58篇
  2006年   55篇
  2005年   65篇
  2004年   54篇
  2003年   39篇
  2002年   51篇
  2001年   37篇
  2000年   33篇
  1999年   19篇
  1998年   27篇
  1997年   11篇
  1996年   15篇
  1995年   14篇
  1994年   10篇
  1993年   13篇
  1992年   2篇
  1991年   10篇
  1990年   12篇
  1989年   13篇
  1988年   10篇
  1987年   6篇
  1986年   10篇
  1985年   4篇
  1984年   5篇
  1983年   8篇
  1982年   6篇
  1981年   4篇
  1980年   3篇
  1978年   2篇
  1976年   3篇
  1974年   5篇
  1972年   2篇
  1967年   3篇
  1963年   1篇
排序方式: 共有1650条查询结果,搜索用时 15 毫秒
41.
Abstract

Microfinance literature has proved the existence of gender discriminatory practices against women in some specific contexts. Discrimination is often explored from the access side (loans approved or denied). Following Agier and Szafarz (2013), we deviate from this practice and use the variable loan size, considering up to four loans for each client. Drawing on data from a microfinance programme in Uganda, we find no evidence of gender discrimination against women clients, even though our results show that the loan size is influenced by personal characteristics and that women, in contrast to men, are rewarded according to their credit history.  相似文献   
42.
43.
44.
Indicators are currently being widely used in international policy making to substantiate analyses and justify decisions on the basis of their alleged scientific objectivity. This article analyses the role of indicators and statistics in the labelling and managing of ‘fragile states’, examining the powerful consequences of these classifications but also discussing the untraceable nature of numbers and the difficulties in attributing ownership of numerical claims and assigning responsibility for their many unforeseen impacts. Focusing on the education sector in Timor-Leste and on the World Bank’s Country Policy and Institutional Assessment (cpia) programme, the article shows how accountability and ownership are negotiated within the context of the g7+ group of self-labelled ‘fragile states’, encouraging an examination of the power relations involved.  相似文献   
45.
This study examined the mediated and moderated effects of a universal family-focused preventive intervention, delivered during young adolescence, on internalizing symptoms assessed in young adulthood. Sixth grade students (N=446; 52% female; 98% White) and their families from 22 rural Midwestern school districts were randomly assigned to the experimental conditions in 1993. Self-report questionnaires were administered at seven time points (pre-test to young adulthood-age 21) to those receiving the Iowa Strengthening Families Program (ISFP) and to the control group. Results showed that growth factors of adolescent internalizing symptoms (grades 6-12) were predicted by ISFP condition and risk status (defined as early substance initiation). Moderation of the condition effect by risk status was found, with higher-risk adolescents benefitting more from the ISFP. Results also supported the hypothesis that the ISFP's effect on internalizing symptoms in young adulthood was mediated through growth factors of adolescents' internalizing symptoms; risk moderation, however, was only marginally significant in young adulthood. The relative reduction rate on clinical or subclinical levels of young adult internalizing symptoms was 28%, indicating that for every 100 young adults displaying clinical or subclinical levels of internalizing symptoms from school districts not offering an intervention, there could be as few as 72 displaying those levels of symptoms in school districts that offered middle school prevention programming. These findings highlight how the positive effects of family-focused universal interventions can extend to non-targeted outcomes and the related potential public-health impact of scaling up these interventions.  相似文献   
46.
47.
48.
49.
This study presents a number of pseudo-operational trials on plastic bags investigating the double- and co-fuming process of a one-step fluorescent cyanoacrylate (LumicyanoTM) in comparisons with the two-step process with basic yellow 40 (BY40) staining for the detection of latent fingermarks. The results demonstrate that both Lumicyano solution and dye contribute to the increased detection of latent fingermarks during the double-fuming process (trial 1). Co-fuming the Lumicyano solution and dye separately (at a concentration of 8%) but simultaneously was less effective than 8% Lumicyano (trial 2). Co-fuming Lumicyano 8% and an additional 8% Lumicyano dye by weight was more effective than Lumicyano 8% (trial 3), possibly due to increased fluorescent material deposition during co-fuming allowing for better visualization. The use of BY40 after Lumicyano resulted in a considerable increase in detected fingermarks.  相似文献   
50.
Many studies in the literature have highlighted the utility of virtual 3D databanks as a substitute for real skeletal collections and the important application of radiological records in personal identification. However, none have investigated the accuracy of virtual material compared to skeletal remains in nonmetric variant analysis using 3D models. The present study investigates the accuracy of 20 computed tomography (CT) 3D reconstruction models compared to the real crania, focusing on the quality of the reproduction of the real crania and the possibility to detect 29 dental/cranial morphological variations in 3D images. An interobserver analysis was performed to evaluate trait identification, number, position, and shape. Results demonstrate a false bone loss in 3D models in some cranial regions, specifically the maxillary and occipital bones in 85% and 20% of the samples. Additional analyses revealed several difficulties in the detection of cranial nonmetric traits in 3D models, resulting in incorrect identification in circa 70% of the traits. In particular, pitfalls included the detection of erroneous position, error in presence/absence rates, in number, and in shape. The lowest percentages of correct evaluations were found in traits localized in the lateral side of the cranium and for the infraorbital suture, mastoid foramen, and crenulation. The present study highlights important pitfalls in CT scan when compared with the real crania for nonmetric analysis. This may have crucial consequences in cases where 3D databanks are used as a source of reference population data for nonmetric traits and pathologies and during bone-CT comparisons for identification purposes.  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