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   7406篇
  免费   435篇
  国内免费   67篇
管理学   594篇
劳动科学   3篇
民族学   30篇
人才学   1篇
人口学   102篇
丛书文集   579篇
理论方法论   355篇
综合类   4621篇
社会学   722篇
统计学   901篇
  2024年   4篇
  2023年   56篇
  2022年   63篇
  2021年   92篇
  2020年   167篇
  2019年   185篇
  2018年   140篇
  2017年   215篇
  2016年   240篇
  2015年   265篇
  2014年   484篇
  2013年   746篇
  2012年   522篇
  2011年   589篇
  2010年   460篇
  2009年   427篇
  2008年   469篇
  2007年   468篇
  2006年   486篇
  2005年   384篇
  2004年   355篇
  2003年   292篇
  2002年   225篇
  2001年   179篇
  2000年   140篇
  1999年   62篇
  1998年   47篇
  1997年   34篇
  1996年   19篇
  1995年   19篇
  1994年   13篇
  1993年   10篇
  1992年   10篇
  1991年   9篇
  1990年   8篇
  1989年   2篇
  1988年   7篇
  1987年   1篇
  1986年   3篇
  1985年   4篇
  1984年   1篇
  1983年   6篇
排序方式: 共有7908条查询结果,搜索用时 19 毫秒
1.
The uneven economic recovery from the pandemic-induced global recession of 2020 is expected to disrupt a multi-decade trend of per capita income convergence between advanced and emerging market and developing economies (EMDEs). This stands in contrast to the global recession following the global financial crisis. Should downside risks to the global recovery, in particular financial market stress, materialize, they are likely to set back growth in EMDEs more than in advanced economies in part because of the more limited policy space remaining in EMDEs, and would further widen per capita income divergence.  相似文献   
2.
Addressing the lack of physical activity (PA) in rural adults is vital because of the role it plays in the risk for many chronic diseases. The purpose of the study was to explore the feasibility of conducting a 12-week intervention utilizing a Fitbit to increase PA behavior in inactive rural adults recruited from a primary care clinic. Semi-structured interviews were conducted with study participants (n=10) and a focus group was held with nurses (n=7) from the primary care clinic. Data were analyzed using the process of immersion/crystallization. Participants and nurses both felt the program had a positive impact on PA and that the program was needed in the community. Study participants most often reported their favorite part of the study was being able to track their activity as well as the goal setting. However, study participants reported barriers to continued participation in PA related to a lack of time and ability to be active in cold weather. Further, nursing staff reported barriers in regard to a lack of resources (staffing and money) These barriers need to be examined further and addressed in order to implement a sustainable PA program that can be maintained through a primary care clinic.  相似文献   
3.
In realist evaluation, where researchers aim to make program theories explicit, they can encounter competing explanations as to how programs work. Managing explanatory tensions from different sources of evidence in multi-stakeholder projects can challenge external evaluators, especially when access to pertinent data, like client records, is mediated by program stakeholders. In this article, we consider two central questions: how can program stakeholder motives shape a realist evaluation project; and how might realist evaluators respond to stakeholders’ belief-motive explanations, including those about program effectiveness, based on factors such as supererogatory commitment or trying together in good faith? Drawing on our realist evaluation of a service reform initiative involving multiple agencies, we describe stakeholder motives at key phases, highlighting a need for tactics and skills that help to manage explanatory tensions. In conclusion, the relevance of stakeholders’ belief-motive explanations (‘we believe the program works’) in realist evaluation is clarified and discussed.  相似文献   
4.
Work on democratization typically considers the diffusion of democracy through interstate partnerships. However, such partnerships constitute complex networks that scholars have yet to fully explore as vectors for the spread of democracy. We develop a network theory of democratization which characterizes these networks as epistemic communities that influence elites’ attitudes towards favorable regime types. Our theory predicts, and our empirical strategy confirms, that direct and indirect ties in the alliance network are vectors for democratization. In contrast to conventional wisdom, we find that direct influence is only transmitted through the defensive alliance network and find evidence of higher-order effects.  相似文献   
5.
The increasing elderly population puts significant health, economic, and social burdens on society. Physical activity is one of the most cost-effective ways to maintain the health of the elderly. This study adopts a treatment effects model to investigate the causal relationship between environment attributes and physical activity among the elderly, while taking endogeneity into account. The data were collected from 274 participants by face-to-face interviews in Taichung, Taiwan. Performing physical activity regularly in parks is the most important measure of the amount of physical activity by the elderly. Providing sufficient and accessible parks in metropolitan residential neighborhoods could be one of the most cost-effective ways to promote physical activity for the elderly living in midsize Asian cities.  相似文献   
6.
7.
Research shows that top‐down‐designed parenting programmes do not always meet the needs of postmigration parents. Bottom‐up programmes by migrant organizations hold a promise to fill this gap; however, research about these programmes and appropriate evaluation methodologies is scarce. Drawing upon Wenger's ( 2010 ) “communities of practice,” this paper explores an alternative perspective on parenting programme evaluation. Findings are presented from a study looking into social learning processes of postmigration parents who participated in a bottom‐up programme about raising teenagers in urban areas. Using an ethnographically inspired method combined with a preprogramme and postprogramme design, 115 Moroccan‐Dutch mothers and fathers from 15 programme groups participated. Results show that the programme provided a social learning space in which parents used themselves as resources to learn collectively about parenting. Moreover, parents consciously engaged in learning interactions across learning spaces stretched into their social networks. These analyses showed how parents' development of “learning citizenship” (Wenger, 2009 ) provides us with insight in collective learning dimensions present in a bottom‐up parenting programme, which is often not included in evaluation studies. Implications for practitioners as facilitators of parents' collective learning are presented.  相似文献   
8.
为了对多个多属性(指标)待评价对象(方案)在多个时间点的发展状态和该时间段内的总体发展水平进行比较分析,根据理想解法和灰关联度法优缺点,提出基于理想解和灰关联度的动态评价方法。该方法基于三维数据,将欧氏距离和灰色关联度相结合,提出一种新贴近度,同时反映了位置关系和数据曲线的相似性差异,兼顾评价指标值差异程度和增长程度。最后将该方法应用于"十二五"期间省域循环经济生态效益评价,通过实例验证该方法实际应用上的有效性。  相似文献   
9.
作为被广泛使用的社交媒体,微信已经成为热点事件和网络舆情的重要策源地,科学准确评估微信公众号的影响力对于明晰微信信息传播特点,深入挖掘微信传播潜力,进一步规范和指导微信平台的传播行为具有较大的理论和实践意义。在对既有关于微信公众号影响力研究进行梳理和评价的基础上,基于传播效果测量的设计,坚持以受众为中心、由浅入深多层次考察准则,运用德尔菲法和层次分析法建构一套微信公众号影响力指标体系。该指标体系由4个一级指标和9个二级指标构成,并运用线性合成法合成微信公众号影响力指数。  相似文献   
10.
In analyzing data from unreplicated factorial designs, the half-normal probability plot is commonly used to screen for the ‘vital few’ effects. Recently, many formal methods have been proposed to overcome the subjectivity of this plot. Lawson (1998) (hereafter denoted as LGB) suggested a hybrid method based on the half-normal probability plot, which is a blend of Lenth (1989) and Loh (1992) method. The method consists of fitting a simple least squares line to the inliers, which are determined by the Lenth method. The effects exceeding the prediction limits based on the fitted line are candidates for the vital few effects. To improve the accuracy of partitioning the effects into inliers and outliers, we propose a modified LGB method (hereafter denoted as the Mod_LGB method), in which more outliers can be classified by using both the Carling’s modification of the box plot (Carling, 2000) and Lenth method. If no outlier exists or there is a wide range in the inliers as determined by the Lenth method, more outliers can be found by the Carling method. A simulation study is conducted in unreplicated 24 designs with the number of active effects ranging from 1 to 6 to compare the efficiency of the Lenth method, original LGB methods, and the proposed modified version of the LGB method.  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