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   474篇
  免费   9篇
管理学   64篇
民族学   2篇
人才学   1篇
人口学   37篇
理论方法论   43篇
综合类   2篇
社会学   217篇
统计学   117篇
  2024年   2篇
  2023年   8篇
  2022年   3篇
  2021年   9篇
  2020年   17篇
  2019年   29篇
  2018年   37篇
  2017年   31篇
  2016年   25篇
  2015年   10篇
  2014年   23篇
  2013年   82篇
  2012年   33篇
  2011年   18篇
  2010年   12篇
  2009年   14篇
  2008年   19篇
  2007年   9篇
  2006年   13篇
  2005年   7篇
  2004年   11篇
  2003年   14篇
  2002年   5篇
  2001年   8篇
  2000年   6篇
  1999年   2篇
  1998年   5篇
  1997年   2篇
  1996年   4篇
  1995年   1篇
  1994年   1篇
  1993年   2篇
  1991年   3篇
  1989年   4篇
  1988年   1篇
  1986年   2篇
  1982年   1篇
  1981年   3篇
  1980年   2篇
  1976年   2篇
  1974年   1篇
  1973年   1篇
  1972年   1篇
排序方式: 共有483条查询结果,搜索用时 0 毫秒
31.

Background

The rates of breastfeeding worldwide are slowly improving since 1996. Europe is still trailing behind the global breastfeeding incidence and prevalence rates. Thus, breastfeeding promotion, protection, prolongation and support have become an important challenge as breastfeeding sharply decreases in the first six months of life.

Objectives

The aim of this project is to determine, assess and identify the real impact of breastfeeding support networks in Murcia (Spain).

Methods

After searching unsuccessfully for a validated questionnaire, a specific one was developed and validated for measuring the impact of formal and informal support networks through five dimensions: satisfaction, consultation, experience, problems and support. The questionnaire was provided to 500 mothers with experience in breastfeeding, who brought their children to baby paediatricians between 2 June and 27 November 2014. Upon completion of the survey and fieldwork, a detailed statistical analysis was conducted.

Results

The degree of satisfaction perceived by the users of the services of support breastfeeding networks is remarkable. In addition, mothers who clarified their doubts and discussed their problems with health professionals and/or breastfeeding support networks were more likely to breastfeed for a longer duration compared to those who did not (p = 0.005). Furthermore, mothers who sought support in breastfeeding are more likely to breastfeed for more than 6 months (p < 0.0005).

Conclusion

Based on this information, we conclude that breastfeeding support networks have a positive influence in the duration of a women’s decision to breastfeed.  相似文献   
32.
Same parliaments, to form a committee of size $q$ , use a voting process like the following: every parliamentary member votes for one out of a fixed set of candidates, and those $q$ candidates receiving more votes are elected for the committee. Assuming total discipline of vote, this is a game form in which players are the parliamentary groups. We investigate, according to some natural hypotheses about preferences, the likely distribution of the members of this committee. The main results are: (a) when fractional votes are allowed, there is a complete agreement between the distribution among the groups of the elected candidates that are outcomes of a Nash equilibrium and the distribution that, according to the size of the groups, would compute the Jefferson-d’Hondt allocation rule, and (b) when fractional votes are not allowed, there is a near agreement for a majority of situations.  相似文献   
33.
The division problem consists of allocating a given amount of a homogeneous and perfectly divisible good among a group of agents with single-peaked preferences on the set of their potential shares. A rule proposes a vector of shares for each division problem. The literature has implicitly assumed that agents will find acceptable any share they are assigned to. In this article we consider the division problem when agents’ participation is voluntary. Each agent has an idiosyncratic interval of acceptable shares where his preferences are single-peaked. A rule has to propose to each agent either to not participate or an acceptable share because otherwise he would opt out and this would require to reassign some of the remaining agents’ shares. We study a subclass of efficient and consistent rules and characterize extensions of the uniform rule that deal explicitly with agents’ voluntary participation.  相似文献   
34.
Lately, with the goal of improving road safety, car makers developed and commercialised some Advanced Driver Assistance Systems (ADAS) which, through the detection of blind spot areas on the vehicle's sides, could help the drivers during the overtaking and the change lane task. Despite the possible benefits to reduce lateral crashes, the overall impact on road safety of such systems have not been deeply studied yet; notably, despite some researches have been carried out, there is a lack of studies regarding the long-term usage and drivers' acceptance of those systems. In order to fill the research gap, a methodology, based on the combination of focus groups interviews, questionnaires and a small-scale field operational test (FOT), has been designed in this study; such a methodology aims at evaluating drivers' acceptance of Blind Spot Information System? and at proposing some ideas to improve the usability and user-friendliness of this (or similar) device in their future development.  相似文献   
35.
In the new development strategy currently shaping Latin America, alternative social policy models have emerged. This article argues that far from being rival alternatives, each of these models considers the wide differences among countries. The region is emerging from a century of transformation – from a traditional agrarian economy to an urban industrial one – in which countries have taken diverse historical paths. Some have almost completed this transformation, others are taking early steps, and the vast majority are living through it. State‐led transition has followed two successive development strategies. From the 1920s up to the 1980s, state developmentalism has mostly successfully assumed the twin challenges of economic and social progress. In the last two decades of the century, Latin American states adopted the policies of the Washington Consensus, which emphasized the importance of business in the framework of globalization and benefited the affluent few. However, an unambiguous shift in direction has been taking place in Latin America since the 1997 economic crisis. This article suggests that a new developmental welfare state model seems to be in the making. How will it evolve over the wider space of an increasingly integrated Latin America?  相似文献   
36.
37.
Health care executives need to take every step possible to overcome barriers to adoption of new technology by physicians. Through just a few relatively simple and inexpensive strategies, they can enable their physicians to use the clinical information system and bring value to their patients, health system and medical staff.  相似文献   
38.
Many approaches to estimation of panel models are based on an average or integrated likelihood that assigns weights to different values of the individual effects. Fixed effects, random effects, and Bayesian approaches all fall into this category. We provide a characterization of the class of weights (or priors) that produce estimators that are first‐order unbiased. We show that such bias‐reducing weights will depend on the data in general unless an orthogonal reparameterization or an essentially equivalent condition is available. Two intuitively appealing weighting schemes are discussed. We argue that asymptotically valid confidence intervals can be read from the posterior distribution of the common parameters when N and T grow at the same rate. Next, we show that random effects estimators are not bias reducing in general and we discuss important exceptions. Moreover, the bias depends on the Kullback–Leibler distance between the population distribution of the effects and its best approximation in the random effects family. Finally, we show that, in general, standard random effects estimation of marginal effects is inconsistent for large T, whereas the posterior mean of the marginal effect is large‐T consistent, and we provide conditions for bias reduction. Some examples and Monte Carlo experiments illustrate the results.  相似文献   
39.
Introduction     
Public Organization Review -  相似文献   
40.
Public Organization Review - This exploratory research aims to propose a conceptual definition of governance and to speculate on the state of governance in Latin America. Political instability,...  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