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   19244篇
  免费   344篇
  国内免费   1篇
管理学   2773篇
民族学   69篇
人才学   1篇
人口学   1866篇
丛书文集   77篇
教育普及   2篇
理论方法论   1717篇
现状及发展   1篇
综合类   257篇
社会学   9294篇
统计学   3532篇
  2021年   112篇
  2020年   274篇
  2019年   374篇
  2018年   437篇
  2017年   599篇
  2016年   471篇
  2015年   347篇
  2014年   456篇
  2013年   2992篇
  2012年   631篇
  2011年   608篇
  2010年   443篇
  2009年   369篇
  2008年   442篇
  2007年   459篇
  2006年   453篇
  2005年   440篇
  2004年   401篇
  2003年   375篇
  2002年   416篇
  2001年   519篇
  2000年   529篇
  1999年   460篇
  1998年   339篇
  1997年   310篇
  1996年   321篇
  1995年   301篇
  1994年   283篇
  1993年   288篇
  1992年   342篇
  1991年   316篇
  1990年   285篇
  1989年   290篇
  1988年   289篇
  1987年   250篇
  1986年   243篇
  1985年   279篇
  1984年   267篇
  1983年   250篇
  1982年   215篇
  1981年   181篇
  1980年   164篇
  1979年   194篇
  1978年   176篇
  1977年   159篇
  1976年   134篇
  1975年   157篇
  1974年   118篇
  1973年   115篇
  1972年   93篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
991.
992.
Stochastic scenario trees are a new and popular method by which surveillance systems can be analyzed to demonstrate freedom from pests and disease. For multiple component systems—such as a combination of a serological survey and systematically collected observations—it can be difficult to represent the complete system in a tree because many branches are required to represent complex conditional relationships. Here we show that many of the branches of some scenario trees have identical outcomes and are therefore redundant. We demonstrate how to prune branches and derive compact representations of scenario trees using matrix algebra and Bayesian belief networks. The Bayesian network representation is particularly useful for calculation and exposition. It therefore provides a firm basis for arguing disease freedom in international forums.  相似文献   
993.
景观设计是一个基于科学的解决规划和设计问题的艺术性行业。本文根据Jon Bryan Burley博士2007年秋在南京林业大学为规划与设计专业师生所作的第七次演讲的内容,阐述了科学与艺术之间的平衡。Burley博士通过展示和列举他在中国工作时个人手绘作品及在密歇根所做的计算机辅助视觉质量评估工作的案例,描述了艺术和科学之间的区别、标准化的理论和科学理论之间的区别。Burley博士认为,作为设计师,艺术和科学两种方法缺一不可。随着科技的发展变化,新方法和新技术终将完美结合并被专业所接受。  相似文献   
994.
Qualitative research in the UK has revealed a diversity of financial arrangements underlying separate systems of household financial management. One factor, identified in previous work, is perceived ownership of money, with financial practices differing according to whether couples have distinct, blurred or shared ownership perceptions. The present work aims to build on and extend this research, using data from an online survey study with 190 cohabitants in the UK. The findings reveal that ownership perceptions transcend separate money management categories, and can be a significant predictor of the type of contribution cohabitants make towards joint household expenses.  相似文献   
995.
We examine differences in the value of statistical life (VSL) across potential wage levels in panel data using quantile regressions with intercept heterogeneity. Latent heterogeneity is econometrically important and affects the estimated VSL. Our findings indicate that a reasonable average cost per expected life saved cut-off for health and safety regulations is 7 million to7 million to 8 million per life saved, but the VSL varies considerably across the labor force. Our results reconcile the previous discrepancies between hedonic VSL estimates and the values implied by theories linked to the coefficient of relative risk aversion. Because the VSL varies elastically with income, regulatory agencies should regularly update the VSL used in benefit assessments, increasing the VSL proportionally with changes in income over time.  相似文献   
996.
997.
The goal of this study is to provide a detailed analysis of the job search decisions of nurses in Canada. The results of this study show that the most important variables influencing the probability of searching for a new job are annual earnings and satisfaction with pay. Socio-economic variables and individual attitudes have an effect for some groups, but these variables are less important. There are differences between women who are and are not currently employed as nurses and this could potentially be a beneficial group to study in terms of policies to recruit and retain nurses in the profession.  相似文献   
998.
How is ‘authentic’ linguistic femininity in Japan manifested in popular texts? We analyze the dialogue of female characters in Wakaba, a 2005 Japanese drama set in two very different parts of ‘regional’ Japan – Miyazaki and Kobe. Through this analysis, we examine two contradictory discourses circulated through popular media. The first is that linguistic femininity is based in Standard Japanese – a surprisingly persistent ideology despite a current trend to examine cases in which language ideology and practice do not match. Other studies reflect another dominant discourse, that of the ‘authentic’ dialect speaker, who expresses local alignment by using dialect forms outside the bounds of ideologically modern linguistic forms. The tension between acting linguistically feminine and ‘authentically’ local raises some interesting questions for Japanese language and gender studies, including studies of gendered representations: are women who are speakers of regional dialects authentically ‘feminine’? Can they be? Do some dialects express femininity better than others?  相似文献   
999.
This research examined the effects of a casino’s auditory character on estimates of elapsed time while gambling. More specifically, this study varied whether the sound heard while gambling was ambient casino sound alone or ambient casino sound accompanied by music. The tempo and volume of both the music and ambient sound were varied to manipulate temporal engagement and introspection. One hundred and sixty (males = 91) individuals played slot machines in groups of 5–8, after which they provided estimates of elapsed time. The findings showed that the typical ambient casino auditive environment, which characterizes the majority of gaming venues, promotes understated estimates of elapsed duration of play. In contrast, when music is introduced into the ambient casino environment, it appears to provide a cue of interval from which players can more accurately reconstruct elapsed duration of play. This is particularly the case when the tempo of the music is slow and the volume is high. Moreover, the confidence with which time estimates are held (as reflected by latency of response) is higher in an auditive environment with music than in an environment that is comprised of ambient casino sounds alone. Implications for casino management are discussed.  相似文献   
1000.
The purpose of this article is to explore the wide spectrum of external influences that affect career decision making across the life span and, in particular, how these factors may directly or indirectly alter one's career trajectory and the extent of one's work volition. Career development practitioners are encouraged to respect externally oriented frameworks, explore the social influence of career choice alternatives faced by clients, encourage clients to voice their emotional responses to external constraints, and use career decision‐making strategies that seek an optimal balance of internal and external influences.  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