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   36401篇
  免费   1389篇
  国内免费   20篇
  2020年   357篇
  2019年   495篇
  2018年   674篇
  2017年   716篇
  2016年   711篇
  2015年   533篇
  2014年   605篇
  2013年   2945篇
  2012年   1056篇
  2011年   1163篇
  2010年   780篇
  2009年   766篇
  2008年   1079篇
  2007年   1038篇
  2006年   939篇
  2005年   786篇
  2004年   731篇
  2003年   807篇
  2002年   736篇
  2001年   1286篇
  2000年   1251篇
  1999年   924篇
  1998年   451篇
  1997年   380篇
  1996年   368篇
  1995年   346篇
  1994年   356篇
  1993年   346篇
  1992年   790篇
  1991年   749篇
  1990年   720篇
  1989年   658篇
  1988年   626篇
  1987年   619篇
  1986年   593篇
  1985年   652篇
  1984年   541篇
  1983年   415篇
  1982年   358篇
  1981年   346篇
  1979年   508篇
  1978年   377篇
  1977年   369篇
  1976年   345篇
  1975年   446篇
  1974年   453篇
  1973年   505篇
  1972年   401篇
  1968年   390篇
  1966年   394篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
12.
13.
Introduction     
Journal of International Migration and Integration -  相似文献   
14.
This paper summarizes three lines of research that are motivated by the practical problem of helping users find information from external data sources, most notably computers. The application areas include information retrieval, text categorization, and question answering. A common theme in these applications is that practical information access problems can be solved by analyzing the statistical properties of words in large volumes of real world texts. The same statistical properties constrain human performance, thus we believe that solutions to practical information access problems can shed light on human knowledge representation and reasoning.  相似文献   
15.
The authors tested effects of a 10-week group cognitive-behavioral stress management intervention among 100 women newly treated for Stage 0-II breast cancer. The intervention reduced prevalence of moderate depression (which remained relatively stable in the control condition) but did not affect other measures of emotional distress. The intervention also increased participants' reports that having breast cancer had made positive contributions to their lives, and it increased generalized optimism. Both remained significantly elevated at a 3-month follow-up of the intervention. Further analysis revealed that the intervention had its greatest impact on these 2 variables among women who were lowest in optimism at baseline. Discussion centers on the importance of examining positive responses to traumatic events--growth, appreciation of life, shift in priorities, and positive affect-as well as negative responses.  相似文献   
16.
This study examined individuals' tendencies to migrate from one organization to another (i.e., the propensity to switch employers). Previous researchers have suggested that switching organizations throughout the career span may be partially heritable and therefore related to individual differences in personality traits. If personality traits are indeed related to a tendency to turnover from organizations, this suggests that current procedures for calculating utility may be inaccurate. Using a database of 1081 individuals who have been in the workforce for several years, results indicated that personality traits measured by the Occupational Personality Questionnaire (non‐ipsative; OPQn) were modestly related to organization switching (i.e., repeated moves from organization to organization). We found that higher scores on extraversion, openness to experience, and conscientiousness‐related traits were modestly correlated with more frequent organization switching. However, we demonstrate that these modest relationships can produce large inaccuracies in utility estimates.  相似文献   
17.
18.
19.
Our aim was to explore the role of parents in the transmission of stereotypical body size attitudes and awareness of weight loss strategies to preschool children. Participants were 279 3‐year‐old children and their parents, who provided data at baseline and 1 year later. Parents completed self‐report body size attitude and dieting measures. Child weight bias and awareness of weight loss strategies were assessed through interview. Over time, negative associations with large bodies and awareness of weight loss strategies increased. Fathers’ attitudes prospectively predicted boys’ weight bias and awareness of weight loss strategies. Among girls, parental attitudes were less predictive. Findings confirm the importance of fathers in the development of boys’ body attitudes and inform prevention programmes.  相似文献   
20.
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