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   91931篇
  免费   2961篇
  国内免费   3篇
管理学   12642篇
民族学   551篇
人才学   25篇
人口学   7199篇
丛书文集   518篇
教育普及   1篇
理论方法论   9503篇
综合类   2149篇
社会学   43366篇
统计学   18941篇
  2023年   509篇
  2021年   575篇
  2020年   1523篇
  2019年   2213篇
  2018年   2136篇
  2017年   3221篇
  2016年   2451篇
  2015年   2057篇
  2014年   2641篇
  2013年   18884篇
  2012年   2511篇
  2011年   2330篇
  2010年   2029篇
  2009年   2208篇
  2008年   2121篇
  2007年   1937篇
  2006年   2151篇
  2005年   2313篇
  2004年   2202篇
  2003年   1926篇
  2002年   2018篇
  2001年   2063篇
  2000年   1830篇
  1999年   1738篇
  1998年   1530篇
  1997年   1380篇
  1996年   1341篇
  1995年   1370篇
  1994年   1309篇
  1993年   1304篇
  1992年   1320篇
  1991年   1252篇
  1990年   1227篇
  1989年   1060篇
  1988年   1144篇
  1987年   1012篇
  1986年   920篇
  1985年   1103篇
  1984年   1159篇
  1983年   1028篇
  1982年   948篇
  1981年   865篇
  1980年   815篇
  1979年   890篇
  1978年   783篇
  1977年   714篇
  1976年   658篇
  1975年   632篇
  1974年   534篇
  1973年   443篇
排序方式: 共有10000条查询结果,搜索用时 947 毫秒
391.
392.
This study tested Super's model of career adaptability by examining the relationships between career development concerns, values, and role salience among 881 men employed full-time in a cement factory. They responded to the Adult Career Concerns Inventory, the Values Inventory, and the Salience Inventory. The inter-correlations of the resulting scores were appropriately small and coincided with theoretical predictions. A principal components analysis clarified the latent structure of the relations between and among the scales. The results supported both Super's model of career adaptation and his model for Career Development Assessment and Counseling.  相似文献   
393.
394.
Impacts of complex emergencies or relief interventions have often been evaluated by absolute mortality compared to international standardized mortality rates. A better evaluation would be to compare with local baseline mortality of the affected populations. A projection of population-based survival data into time of emergency or intervention based on information from before the emergency may create a local baseline reference. We find a log-transformed Gaussian time series model where standard errors of the estimated rates are included in the variance to have the best forecasting capacity. However, if time-at-risk during the forecasted period is known then forecasting might be done using a Poisson time series model with overdispersion. Whatever, the standard error of the estimated rates must be included in the variance of the model either in an additive form in a Gaussian model or in a multiplicative form by overdispersion in a Poisson model. Data on which the forecasting is based must be modelled carefully concerning not only calendar-time trends but also periods with excessive frequency of events (epidemics) and seasonal variations to eliminate residual autocorrelation and to make a proper reference for comparison, reflecting changes over time during the emergency. Hence, when modelled properly it is possible to predict a reference to an emergency-affected population based on local conditions. We predicted childhood mortality during the war in Guinea-Bissau 1998-1999. We found an increased mortality in the first half-year of the war and a mortality corresponding to the expected one in the last half-year of the war.  相似文献   
395.
396.
397.
398.
399.
This article examines trends in divorce attitudes of young adult women in the United States by educational attainment from 1974 to 2002. Women with 4‐year college degrees, who previously had the most permissive attitudes toward divorce, have become more restrictive in their attitudes toward divorce than high school graduates and women with some college education, whereas women with no high school diplomas have increasingly permissive attitudes toward divorce. We examine this educational crossover in divorce attitudes in the context of variables correlated with women's educational attainment, including family attitudes and religion, income and occupational prestige, and family structure. We conclude that the educational crossover in divorce attitudes is associated most strongly with work and family structure variables.  相似文献   
400.
In this paper we reanalyze Robert D. Mare's highly influential work on educational transitions among American men born in the first half of the 20th century. Contrary to previous belief, Mare found that the effects of socioeconomic background variables decline regularly across educational transitions in conditional logistic regression analyses. We have reconfirmed Mare's findings and tested them by introducing a modified logistic response model that constrains selected social background effects to vary proportionally across educational transitions. We refer to our preferred model as the logistic response model with partial proportionality constraints (LRPPC). The model can easily be estimated in Stata or using other standard statistical software. Partial proportionality constraints may also prove useful in interpopulation comparisons based on other linear models.  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