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   2138篇
  免费   61篇
管理学   357篇
民族学   11篇
人才学   2篇
人口学   174篇
丛书文集   13篇
理论方法论   218篇
综合类   22篇
社会学   1187篇
统计学   215篇
  2023年   12篇
  2020年   38篇
  2019年   37篇
  2018年   36篇
  2017年   72篇
  2016年   55篇
  2015年   39篇
  2014年   64篇
  2013年   347篇
  2012年   65篇
  2011年   78篇
  2010年   61篇
  2009年   53篇
  2008年   74篇
  2007年   54篇
  2006年   49篇
  2005年   59篇
  2004年   69篇
  2003年   49篇
  2002年   76篇
  2001年   32篇
  2000年   33篇
  1999年   51篇
  1998年   33篇
  1997年   27篇
  1996年   28篇
  1995年   27篇
  1994年   29篇
  1993年   29篇
  1992年   34篇
  1991年   29篇
  1990年   37篇
  1989年   27篇
  1988年   31篇
  1987年   23篇
  1986年   28篇
  1985年   20篇
  1984年   20篇
  1983年   30篇
  1982年   18篇
  1981年   29篇
  1980年   24篇
  1979年   22篇
  1978年   16篇
  1977年   18篇
  1976年   21篇
  1975年   17篇
  1974年   11篇
  1971年   8篇
  1970年   8篇
排序方式: 共有2199条查询结果,搜索用时 921 毫秒
871.
In this article, we develop statistical models to predict the number and geographic distribution of fires caused by earthquake ground motion and tsunami inundation in Japan. Using new, uniquely large, and consistent data sets from the 2011 Tōhoku earthquake and tsunami, we fitted three types of models—generalized linear models (GLMs), generalized additive models (GAMs), and boosted regression trees (BRTs). This is the first time the latter two have been used in this application. A simple conceptual framework guided identification of candidate covariates. Models were then compared based on their out‐of‐sample predictive power, goodness of fit to the data, ease of implementation, and relative importance of the framework concepts. For the ground motion data set, we recommend a Poisson GAM; for the tsunami data set, a negative binomial (NB) GLM or NB GAM. The best models generate out‐of‐sample predictions of the total number of ignitions in the region within one or two. Prefecture‐level prediction errors average approximately three. All models demonstrate predictive power far superior to four from the literature that were also tested. A nonlinear relationship is apparent between ignitions and ground motion, so for GLMs, which assume a linear response‐covariate relationship, instrumental intensity was the preferred ground motion covariate because it captures part of that nonlinearity. Measures of commercial exposure were preferred over measures of residential exposure for both ground motion and tsunami ignition models. This may vary in other regions, but nevertheless highlights the value of testing alternative measures for each concept. Models with the best predictive power included two or three covariates.  相似文献   
872.
873.
The present study compared the social behaviors of eight‐year‐old previously institutionalized Romanian children from the Bucharest Early Intervention Project (BEIP) in two groups: (1) children randomized to foster care homes (FCG), and (2) children randomized to care as usual (remaining in institutions) (CAUG). Children were observed interacting with an age‐ and gender‐matched unfamiliar, non‐institutionalized peer from the community during six interactive tasks, and their behavior was coded for speech reticence, social engagement, task orientation, social withdrawal, and conversational competence. Group comparisons revealed that FCG children were rated as significantly less reticent during a speech task than CAUG children. For CAUG children, longer time spent in institutional care was related to greater speech reticence and lower social engagement. Using an actor–partner interdependence model, CAUG children's behaviors, but not FCG, were found to influence the behavior of unfamiliar peers. These findings are the first to characterize institutionalized children's observed social behaviors toward new peers during middle childhood and highlight the positive effects of foster care intervention in the social domain.  相似文献   
874.
Incentives Policies to Site Hazardous Waste Facilities   总被引:1,自引:0,他引:1  
This paper addresses the use of mitigation and compensation as incentives policies to stimulate agreement between parties interested in siting a hazardous waste facility and potential host communities. We develop a model of facility siting that distinguishes five key factors which influence the acceptability of a proposed facility when considered in relation to status quo conditions. This model then is used to examine the effectiveness of different incentives policies with regard to (a) mitigating the perceived risks and (b) compensating the adverse impacts of a hazardous waste facility.  相似文献   
875.
876.
877.
878.
Reply     
  相似文献   
879.
Using a sample of 387 male federal employees who responded to a questionnaire, this study tests two theoretical perspectives concerning the effect of women's labor force participation on men's work experiences. One theory, with roots in the external-conflict/intenial-cohesion and minority-group size/discrimination literature, predicts that the greater the representation of women in work groups, the greater the social solidarity among male workers and the less the social support for males from female coworkers. A second theory, derived primarily from Blau's exploration into the quantitative properties of social structure, suggests that the higher the proportional representation of females, the lower of social solidarity among male workers and the greater the social support for males from female coworkers. The findings support the latter, not the former, theoretical perspective.  相似文献   
880.
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