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   1656篇
  免费   62篇
  国内免费   16篇
管理学   169篇
民族学   13篇
人口学   14篇
丛书文集   101篇
理论方法论   69篇
综合类   819篇
社会学   103篇
统计学   446篇
  2024年   2篇
  2023年   11篇
  2022年   24篇
  2021年   29篇
  2020年   41篇
  2019年   52篇
  2018年   43篇
  2017年   57篇
  2016年   66篇
  2015年   61篇
  2014年   85篇
  2013年   213篇
  2012年   131篇
  2011年   105篇
  2010年   89篇
  2009年   76篇
  2008年   73篇
  2007年   87篇
  2006年   95篇
  2005年   66篇
  2004年   69篇
  2003年   55篇
  2002年   53篇
  2001年   35篇
  2000年   33篇
  1999年   19篇
  1998年   9篇
  1997年   11篇
  1996年   11篇
  1995年   7篇
  1994年   4篇
  1993年   3篇
  1992年   3篇
  1991年   3篇
  1990年   4篇
  1987年   2篇
  1986年   1篇
  1985年   2篇
  1984年   1篇
  1982年   1篇
  1981年   1篇
  1980年   1篇
排序方式: 共有1734条查询结果,搜索用时 866 毫秒
881.
South Africa has one of the highest inequality levels in the world. In 1993, nearly half of the population were considered poor. These poverty and inequality levels were and still are a legacy of South Africa’s colonial and apartheid past. Since the end of apartheid, there has been a strong governmental effort to combat poverty and in this light a ‘social indicators movement’ has emerged. The aim of this article is to contribute to the South African social indicators research in three ways: Firstly, this article introduces ethnicity as a unit of analysis in the context of poverty and well-being. It is argued that racial categorisations are not justifiable and in the case of South Africa hide valuable insights. The results of an exploratory analysis suggest that ethnicity allows a more insightful analysis of poverty and well-being than race. Secondly, this article introduces a multiple correspondence analysis (MCA) in the context of subjective well-being research. Many studies regarding subjective well-being in South Africa use ordered probit regression models. It is argued here that these models are based on false assumptions and that a MCA can be seen as a suitable alternative since it constitutes an assumption free model. Lastly, the insights gained from the exploratory analysis are discussed. The MCA seems to show that subjective well-being can be regarded as an outcome measure. Furthermore, it is argued that there are cultural differences (between the ethnic groups) regarding subjective well-being. It seems that the ethnic groups in South Africa have different conceptions of well-being and that different factors influence their subjective well-being assessments. This work is partly based on a Master thesis from 2004 at the Institute for Development Policy and Management at the University of Manchester. I am grateful for the intellectual guidance, the constant support and encouragement by Wendy Olsen and for the comments on earlier drafts from Peter Edward, David A. Clark and two anonymous reviewers.  相似文献   
882.
环境领域若干前沿问题的探讨   总被引:1,自引:0,他引:1  
人类走向以绿色为标志的可持续发展的道路,是人类生存与发展的希望所在。本文就环境领域若干前沿问题,如生态工业、ISO14000环境质量管理体系、绿色食品、生态安全、生态旅游及全球环境热点等问题进行了探讨,并对环境领域的前沿课题作了评述。  相似文献   
883.
论政治制度的要素结构   总被引:1,自引:0,他引:1  
政治制度是功能繁多、覆盖面大、构造复杂的社会制度。它由政治理念、政治主体、政治规则、政治机构、政治设备五种要素构成,每一要素又是由若干要素构成的子系统。  相似文献   
884.
温潘亚 《学术交流》2001,(6):128-130
文学史的写作不可能没有理论批评成分,即文学史观的介入,它具体包括两个层面文学观和历史观.作为一种具有历时性和开放性的观念系统,科学的文学史观是建立在对文学本质全面而正确的理解和把握之上的.那种把文学史的多系统纵向发展与多层面联结组合起来的努力,目的就是为了建构一种科学的全方位的文学史观,用以寻找文学这棵大树生长的年轮,流变的轨迹.  相似文献   
885.
We model the decisions of a multiproduct firm that faces a fixed “menu” cost: once it is paid, the firm can adjust the price of all its products. We characterize analytically the steady state firm's decisions in terms of the structural parameters: the variability of the flexible prices, the curvature of the profit function, the size of the menu cost, and the number of products sold. We provide expressions for the steady state frequency of adjustment, the hazard rate of price adjustments, and the size distribution of price changes, all in terms of the structural parameters. We study analytically the impulse response of aggregate prices and output to a monetary shock. The size of the output response and its duration both increase with the number of products; they more than double as the number of products goes from 1 to 10, quickly converging to the response of Taylor's staggered price model.  相似文献   
886.
翟文铖 《齐鲁学刊》2006,9(4):89-91
对于茅盾流亡日本时期创作的短篇小说,以往的阐释往往强调其阶级意识而遮蔽了其主题的多重性。事实上,这些作品内涵深邃:一方面,延续了“五四”启蒙传统,对封建文化、国民性、个性解放等命题做出了具有时代色彩的反思;一方面,以形而上的思索超越现实羁绊,对虚无主义的哲学问题予以探索。正确地评价这些作品,将有助于我们重新估定茅盾在文学史上的历史地位。  相似文献   
887.
通过对具有群决策属性的财务管理进行分析,提出一种具有二元语义多属性的新的群决策算子,即诱导二元语义广义概率有序加权平均(2TLIGPOWA)算子。该集合算子的建模,是通过分析二元语义广义有序加权平均(2TLIGOWA)算子的诱导方式以及二元语义广义概率加权平均(2TLGPWA)算子的特性集结,本质就是进行财务管理决策评价矩阵构建,这需要二元语义的加入。通常来讲,单调有界、置换不变、幂等性是本算子应该满足的。针对如何确定算子属性权重问题,结合公平性,同时兼顾属性值的差异性,建立非线性二次偏差最优权重确定模型。之后,确定模型通过对集结算子的结合以及权重分析,提出基于2TLIGPOWA算子的财务管理决策方法。最后通过实例进行验证分析,确定该方法的可行性。  相似文献   
888.
Three modeling systems were used to estimate human health risks from air pollution: two versions of MNRiskS (for Minnesota Risk Screening), and the USEPA National Air Toxics Assessment (NATA). MNRiskS is a unique cumulative risk modeling system used to assess risks from multiple air toxics, sources, and pathways on a local to a state‐wide scale. In addition, ambient outdoor air monitoring data were available for estimation of risks and comparison with the modeled estimates of air concentrations. Highest air concentrations and estimated risks were generally found in the Minneapolis‐St. Paul metropolitan area and lowest risks in undeveloped rural areas. Emissions from mobile and area (nonpoint) sources created greater estimated risks than emissions from point sources. Highest cancer risks were via ingestion pathway exposures to dioxins and related compounds. Diesel particles, acrolein, and formaldehyde created the highest estimated inhalation health impacts. Model‐estimated air concentrations were generally highest for NATA and lowest for the AERMOD version of MNRiskS. This validation study showed reasonable agreement between available measurements and model predictions, although results varied among pollutants, and predictions were often lower than measurements. The results increased confidence in identifying pollutants, pathways, geographic areas, sources, and receptors of potential concern, and thus provide a basis for informing pollution reduction strategies and focusing efforts on specific pollutants (diesel particles, acrolein, and formaldehyde), geographic areas (urban centers), and source categories (nonpoint sources). The results heighten concerns about risks from food chain exposures to dioxins and PAHs. Risk estimates were sensitive to variations in methodologies for treating emissions, dispersion, deposition, exposure, and toxicity.  相似文献   
889.
In this paper, we investigate some inference and design problems related to multiple constant-stress accelerated life test with progressive type-I interval censoring. A Weibull lifetime distribution at each stress-level combination is considered. The scale parameter of Weibull distribution is assumed to be a log-linear function of stresses. We obtain the estimates of the unknown parameters through the method of maximum likelihood, and also derive the Fisher's information matrix. The optimal number of test units, number of inspections, and length of the inspection interval are determined under D-optimality, T-optimality, and E-optimality criteria with cost constraint. An algorithm based on nonlinear mixed-integer programming is proposed to the optimal solution. The sensitivity of the optimal solution to changes in the values of the different parameters is studied.  相似文献   
890.
The paper develops a method from which algorithms can be constructed to numerically compute error-free (free from computer roundoff error) generalized inverses and solutions to linear least squares problems having rational entries. A multiple modulus system is used to avoid error accumulation that is inherent in the floating-point number system. Some properties of finite fields of characteristic p, GF(p), are used in conjunction with a bordering method for matrix inversion to find nonsingular minors of a matrix over the field of rational numbers.  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