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   4094篇
  免费   135篇
  国内免费   40篇
管理学   519篇
民族学   15篇
人口学   256篇
丛书文集   215篇
理论方法论   192篇
综合类   2276篇
社会学   346篇
统计学   450篇
  2024年   10篇
  2023年   25篇
  2022年   32篇
  2021年   51篇
  2020年   64篇
  2019年   85篇
  2018年   104篇
  2017年   158篇
  2016年   141篇
  2015年   131篇
  2014年   219篇
  2013年   510篇
  2012年   234篇
  2011年   258篇
  2010年   224篇
  2009年   212篇
  2008年   223篇
  2007年   258篇
  2006年   235篇
  2005年   220篇
  2004年   167篇
  2003年   149篇
  2002年   136篇
  2001年   141篇
  2000年   91篇
  1999年   39篇
  1998年   24篇
  1997年   23篇
  1996年   16篇
  1995年   15篇
  1994年   7篇
  1993年   14篇
  1992年   8篇
  1991年   6篇
  1990年   7篇
  1989年   7篇
  1988年   7篇
  1987年   5篇
  1986年   1篇
  1985年   4篇
  1984年   5篇
  1983年   1篇
  1980年   1篇
  1975年   1篇
排序方式: 共有4269条查询结果,搜索用时 31 毫秒
81.
文化旅游的兴起是当今旅游业发展的一大趋势。城市更新是城市发展的一种重要途径。随着文化消费时代的来临、文化经济的快速发展,文化旅游在城市更新发展中扮演着日益重要的角色。本文主要以广州为例,探讨了城市更新背景下文化旅游发展的意义、面临的问题和挑战以及进一步的思考。  相似文献   
82.
Nuria Torrado 《Statistics》2017,51(6):1359-1376
Stochastic ordering relations between extreme order statistics from exponential, Weibull and gamma distributions have been studied extensively by many researchers in recent years. In this work, we obtain various ordering results for the comparisons of two extreme order statistics from scale models when one set of scale parameters majorizes the other. The new results obtained here are applied when the baseline distributions are exponentiated Weibull or generalized gamma distributions. In this way, we generalize and extend some results established recently in the literature.  相似文献   
83.
This paper considers quantile regression for a wide class of time series models including autoregressive and moving average (ARMA) models with asymmetric generalized autoregressive conditional heteroscedasticity errors. The classical mean‐variance models are reinterpreted as conditional location‐scale models so that the quantile regression method can be naturally geared into the considered models. The consistency and asymptotic normality of the quantile regression estimator is established in location‐scale time series models under mild conditions. In the application of this result to ARMA‐generalized autoregressive conditional heteroscedasticity models, more primitive conditions are deduced to obtain the asymptotic properties. For illustration, a simulation study and a real data analysis are provided.  相似文献   
84.
The impact of an intervention on the self-determination and career planning engagement of young adults with mental health challenges was studied. Sixty-seven young adults, 20 to 30 years of age, with mental health diagnoses (e.g., depression, bipolar disorder) were randomly assigned to intervention and control groups. Statistically significant greater increases were made by the intervention group versus the control group for self-determination and career planning engagement, and self-determination at least partially mediated increases in career planning engagement. With career planning self-determination interventions, young adults with mental health challenges might be able to achieve better career and life outcomes than is typical for this population.  相似文献   
85.
弃“席”而“坐”居住方式的重大变革是中国古典家具“分”与“融”的主要根源。以楚式家具、宋式家具、明清家具为代表,在矮型家具向高型家具的演变进程中,家具突显出在功能、阶级风格上的“分离”和以消除与居住方式的分歧为目的的式样上的“融合”。其中的“分”与“融”,对现代设计中如何把握产品功能、设计元素、品牌文化的“取”“舍”尺度问题具有重要启示。  相似文献   
86.
This paper describes how government policy thinking about the well‐being of children and young people developed between the Children Act 1989 and the Children Act 2004. These two Acts are milestone statements about how services to children in England and Wales should be delivered. It is an account informed by the author's own experience as a government adviser on children's social care over much of this period and supporting documentation. It traces the strands of government policy thinking about how to deliver services for children from children in need to the articulation of the five Every Child Matters outcomes. It argues that attempts to achieve coordinated service planning for children and young people played a significant role in the formulation of shared objectives and the articulation of child outcomes. However, it argues that looking at real outcomes exposes how children in the UK do relatively badly compared with other rich nations. It questions whether we can realistically expect our services to deliver significantly improved outcomes given the impact of enduring inequality in our society. This paper is dedicated to the memory of David Lambert CBE, former Assistant Chief Inspector of the Social Services Inspectorate in London, who died suddenly on 7 October 2010. He lent me articles to assist me in writing this paper.  相似文献   
87.
城乡统筹的实质是资源的统筹.在重庆市“千万农民变市民”的社会大试验中,教育与培训将发挥重要作用.目前,重庆市农民工的教育与培训存在较多问题,直接影响了农民工市民化的进程,根源在于资源统筹乏力.应当根据科学发展观的要求,加强重庆市农民工的教育培训资源统筹.文章对重庆市实施制度、机构、经费、师资、信息资源这“五大统筹”和统筹模式变革提出了对策建议.  相似文献   
88.
The literature on sequential estimation problems for negative exponential populations has been reviewed here, We attempt to bring in all the published and unpublished materials known to us in a fairly coherent fashion. Both the concepts and theoretical findings are discussed.  相似文献   
89.
This paper concludes our comprehensive study on point estimation of model parameters of a gamma distribution from a second-order decision theoretic point of view. It should be noted that efficient estimation of gamma model parameters for samples ‘not large’ is a challenging task since the exact sampling distributions of the maximum likelihood estimators and its variants are not known. Estimation of a gamma scale parameter has received less attention from the earlier researchers compared to shape parameter estimation. What we have observed here is that improved estimation of the shape parameter does not necessarily lead to improved scale estimation if a natural moment condition (which is also the maximum likelihood restriction) is satisfied. Therefore, this work deals with the gamma scale parameter estimation as a separate new problem, not as a by-product of the shape parameter estimation, and studies several estimators in terms of second-order risk.  相似文献   
90.
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