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   10028篇
  免费   385篇
  国内免费   100篇
管理学   177篇
劳动科学   5篇
民族学   114篇
人才学   1篇
人口学   259篇
丛书文集   1083篇
理论方法论   664篇
综合类   5665篇
社会学   1227篇
统计学   1318篇
  2024年   12篇
  2023年   75篇
  2022年   105篇
  2021年   122篇
  2020年   224篇
  2019年   246篇
  2018年   222篇
  2017年   295篇
  2016年   252篇
  2015年   354篇
  2014年   991篇
  2013年   1549篇
  2012年   1295篇
  2011年   836篇
  2010年   789篇
  2009年   605篇
  2008年   560篇
  2007年   275篇
  2006年   271篇
  2005年   304篇
  2004年   244篇
  2003年   273篇
  2002年   207篇
  2001年   147篇
  2000年   97篇
  1999年   31篇
  1998年   16篇
  1997年   11篇
  1996年   6篇
  1995年   16篇
  1994年   7篇
  1993年   7篇
  1992年   3篇
  1991年   2篇
  1990年   4篇
  1989年   6篇
  1988年   6篇
  1986年   4篇
  1985年   5篇
  1984年   8篇
  1983年   4篇
  1982年   5篇
  1981年   10篇
  1980年   4篇
  1979年   4篇
  1978年   2篇
  1977年   1篇
  1976年   1篇
排序方式: 共有10000条查询结果,搜索用时 125 毫秒
191.
本文回顾了70年代句子习得顺序的相关研究,主要涉及否定句、疑问句的习得顺序的相关研究,也提及70年代提出的关于关系从句的习得顺序的三大研究假设,最后指出70年代习得顺序研究的意义和不足之处以及之后该领域的主要研究动态。  相似文献   
192.
朝日关系是一个特殊的双边关系。二战结束至今已近70年,冷战结束亦有20多年,但朝日两国至今仍处于敌对状态。朝鲜是日本在联合国193个成员国中唯一没有与之建交的国家。而纵观二战后朝日关系发展的历程,两国出于各自利益的需要,开始了旷日持久的邦交正常化谈判,特别是首脑会谈的实现,使得朝日关系有了长足的发展。但由于“绑架问题”、“导弹问题”、“朝鲜核问题”、“历史清算”和“战争赔款”等问题尚未解决,使得两国关系正常化道路难关重重。  相似文献   
193.
在西方思想史上,尼采与德国法西斯主义的关系一直是一个无法回避的问题。尼采战争伦理思想的产生和发展,与西方崇尚强权的政治哲学传统、德意志尚武的民族精神和思想家们对人性伦理的极大关注有着十分紧密的联系。只有深入追踪尼采哲学及其战争伦理思想,了解其背景、主旨和矛盾困境,才能理解尼采的"战争"的真正含义,理清他与德国法西斯主义的种种纠葛。  相似文献   
194.
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   
195.
我国企业品牌定位的五层次研究   总被引:2,自引:0,他引:2  
近年来中国企业的品牌建设取得了可喜的成绩,出现了许多优秀品牌,这些品牌凭借独特、合适的定位取得了成功。但企业在品牌定位方面存在许多误区,如把品牌定位看作产品定位、品牌定位模糊,缺乏差异性和明确的核心价值、品牌盲目延伸导致定位混淆等问题。因此,产品品牌定位必须树立正确的定位理念,应用正确的品牌定位方法。正确的品牌定位方法可分为产品特征定位、物质利益定位、情感利益定位、个性定位以及价值观定位共五个层次。  相似文献   
196.
在我国能源安全面临的一系列重大问题中,能源领域的政策规划薄弱,法律保障制度建设与管理体制改革滞后,能源供应与能源安全保障体系缺乏相关政策、法律和制度的保障。只有真正做到政策、法律和管理体制“三位一体”,才能确保国家能源安全。本文从能源安全体系建构的理论和实践出发,借鉴西方能源安全战略实践,从政策、法律和管理体制等角度,对我国能源安全体系的内在机制建构进行分析,旨在为我国与中东能源合作提供借鉴与参考。  相似文献   
197.
Ignored in the flurry of new research on fathers is that fatherhood may have consequences for men. This article explores possible effects on the lives and well‐being of men for a range of fatherhood experiences. Data are drawn from the National Survey of Families and Households. The first part of this article examines whether men's varied associations with children (no children, coresident, non‐coresident, and stepfatherhood) are associated with men's psychological health and behavior, social connections, intergenerational family relations, and work behavior. We found strong evidence that fathers differ from nonfathers in their social connections, family relationships, and work behavior. There is significant variation in effects among the father types as well. The second section of this article focuses attention only on men who are fathers and examines whether fathering behavior (e.g., the amount of time and nature of the activities that fathers are reported to be spending with their children) is associated with men's well‐being. The effects of father involvement on men was found to be most significant for those who were living with their own children.  相似文献   
198.
In 1935, R.A. Fisher published his well-known “exact” test for 2x2 contingency tables. This test is based on the conditional distribution of a cell entry when the rows and columns marginal totals are held fixed. Tocher (1950) and Lehmann (1959) showed that Fisher s test, when supplemented by randomization, is uniformly most powerful among all the unbiased tests UMPU). However, since all the practical tests for 2x2 tables are nonrandomized - and therefore biased the UMPU test is not necessarily more powerful than other tests of the same or lower size. Inthis work, the two-sided Fisher exact test and the UMPU test are compared with six nonrandomized unconditional exact tests with respect to their power. In both the two-binomial and double dichotomy models, the UMPU test is often less powerful than some of the unconditional tests of the same (or even lower) size. Thus, the assertion that the Tocher-Lehmann modification of Fisher's conditional test is the optimal test for 2x2 tables is unjustified.  相似文献   
199.

Age‐specific models of population renewal (with and without feedback) which imply convergence to a stable state for some levels of fertility or feedback may imply the presence of long‐term cycling around a constant or exponentially changing equilibrium for other levels of fertility or feedback. The switch from one regime to the other is a “bifurcation.”; The conditions for bifurcation involve the roots of an analogue of Lotka's Equation.

Typically bifurcation is induced by raising the strength of feedback or the level of fertility. It has been known since the early 1980s, however, that this is sometimes impossible. It is sometimes impossible even with the linear renewal equation itself and with the most basic of non‐linear models, Lee's cohort feedback model.

Here it is proved that this typical route to bifurcation does not fail for these basic models in the presence of a condition which always holds for realistic applications with higher organisms: the existence of a span of ages before the onset of fertility.

Specifically, a strictly positive lower bound on ages of procreation is proved to be sufficient to guarantee the existence of a rescaling of Lotka's Equation for which the real part of some complex root vanishes. This result holds for absolutely Lebesgue‐integrable (signed) net maternity functions on the positive real line and for absolutely summable (signed) net maternities on the positive integers.

It follows that Coale's rescaling device for the analysis of approach to stability in stable population theory can be implemented for all realistic human net maternity schedules. It also follows that the many special cases of the cohort feedback model throughout population biology will all generate persistent cycling instead of stability if feedback is sufficiently strong.  相似文献   
200.
在西方现代化进程中,科学极大地解放了人的智力和体力,为人的自由发展提供了条件。然而,当科学的权威急剧膨胀变异成科学霸权主义,科学成为奴役人的工具时,却造成了人的困境。我国正处于现代化建设的进程中,需要吸收和借鉴西方科学发展进程中的经验和教训,发展一种厚道的、有机的科学具有重要的现实意义。  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