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   20412篇
  免费   594篇
  国内免费   1篇
管理学   3111篇
民族学   83篇
人才学   1篇
人口学   2003篇
丛书文集   78篇
教育普及   2篇
理论方法论   1808篇
现状及发展   1篇
综合类   272篇
社会学   9890篇
统计学   3758篇
  2023年   102篇
  2021年   128篇
  2020年   302篇
  2019年   431篇
  2018年   530篇
  2017年   700篇
  2016年   562篇
  2015年   402篇
  2014年   523篇
  2013年   3211篇
  2012年   703篇
  2011年   652篇
  2010年   501篇
  2009年   431篇
  2008年   485篇
  2007年   507篇
  2006年   510篇
  2005年   470篇
  2004年   432篇
  2003年   394篇
  2002年   452篇
  2001年   555篇
  2000年   556篇
  1999年   471篇
  1998年   345篇
  1997年   314篇
  1996年   328篇
  1995年   303篇
  1994年   286篇
  1993年   292篇
  1992年   351篇
  1991年   325篇
  1990年   287篇
  1989年   292篇
  1988年   295篇
  1987年   252篇
  1986年   246篇
  1985年   280篇
  1984年   268篇
  1983年   252篇
  1982年   217篇
  1981年   181篇
  1980年   169篇
  1979年   197篇
  1978年   177篇
  1977年   161篇
  1976年   135篇
  1975年   159篇
  1974年   120篇
  1973年   115篇
排序方式: 共有10000条查询结果,搜索用时 609 毫秒
811.
812.
Environmental practices have not received as much research attention in emerging market contexts as traditional topics like quality. However, the importance of environmental practices for a firm’s production strategy has been increasing at an unprecedented level across the globe. Our research objective is, therefore, to investigate the interplay between environmental practices and quality in the pursuit of firm performance. Relying on 492 responses from Turkish manufacturers to test our hypotheses, we show that environmental practices directly improve the quality of products over and above the effect of quality management practices in emerging markets. Product quality, in turn, is important for increasing firm performance, acting as a mediator for the positive effects of environmental practices on performance. Thus, we reveal that product quality functions as an instrumental conduit between environmental practices and firm performance in emerging markets like Turkey where stakeholder pressures are weak, and regulations are often not properly enforced.  相似文献   
813.
Psychometric growth curve modeling techniques are used to describe a person’s latent ability and how that ability changes over time based on a specific measurement instrument. However, the same instrument cannot always be used over a period of time to measure that latent ability. This is often the case when measuring traits longitudinally in children. Reasons may be that over time some measurement tools that were difficult for young children become too easy as they age resulting in floor effects or ceiling effects or both. We propose a Bayesian hierarchical model for such a scenario. Within the Bayesian model we combine information from multiple instruments used at different age ranges and having different scoring schemes to examine growth in latent ability over time. The model includes between-subject variance and within-subject variance and does not require linking item specific difficulty between the measurement tools. The model’s utility is demonstrated on a study of language ability in children from ages one to ten who are hard of hearing where measurement tool specific growth and subject-specific growth are shown in addition to a group level latent growth curve comparing the hard of hearing children to children with normal hearing.KEYWORDS: Bayesian hierarchical models, psychometric modeling, language ability, growth curve modeling, longitudinal analysis  相似文献   
814.
The application of optimization techniques in digital simulation experiments is frequently complicated by the presence of large experimental error variances. Two of the more widely accepted design strategies for the resolution of this problem include the assignment of common pseudorandom number streams and the assignment of antithetic pseudorandom number streams to the experimental points. When considered separately, however, each of these variance-reduction procedures has rather restrictive limitations. This paper examines the simultaneous use of these two techniques as a variance-reduction strategy in response surface methodology (RSM) analysis of simulation models. A simulation of an inventory system is used to illustrate the application and benefits of this assignment procedure, as well as the basic components of an RSM analysis.  相似文献   
815.
In this study, I examine disparities in schooling progress among children born to immigrant and U.S.-born blacks. I find that in one- and two-parent families, children born to black immigrants are less likely to fall behind in school than those born to U.S.-born blacks. In two-parent immigrant families, children born to two immigrant parents have a significant schooling advantage over children born to one immigrant parent. While children born to two immigrant parents in the wealthiest black immigrant families do better in the second generation than in the first, the reverse is observed among children in less wealthy families. These findings contribute in two ways to our understanding of the assimilation processes of children born to black immigrant parents. First, they show that there is a positive association between the number of immigrant parents in a family and children’s schooling performance. Second, they suggest that disparities in the assimilation patterns of the children of black immigrants are a likely product of the interaction between their parental characteristics and the socioeconomic circumstances of their families.  相似文献   
816.
In this paper three prominent discourses of Entrepreneurship Research — 1) the Entrepreneur as an actor in society, 2) the embeddedness of the research object of Entrepreneurship Research and 3) the determinants of entrepreneurship processes — are analyzed for possible interfaces between a sociological and economical perspective. This analyses results in a systemized portfolio of research topics, which seem to be especially attractive for such an integrative research approach. The results of a survey of 105 entrepreneurship researchers in the German speaking world underpin the relevance of the identified interfaces and allow for their priorization. That way we contribute to an integration of this field as the presented set of identified interfaces, in a first step, provides a feasible agenda for interdisciplinary (empirical) follow-up research whose results — in a second step — can build elements of an integrative concept of Entrepreneurship Research.  相似文献   
817.
Based on a cohort of young Austrians of Turkish descent, this paper links the debate on the integration of the second generation (or the lack thereof) with the controversial discourse about the potential usefulness and risks of new media and technologies, specifically the Internet. Various studies have concluded either that the new media and technologies are positive integrative aspects of the society or have devastating impacts on different groups. On the one hand, the Internet allows young people to discover new experiences and gain additional often unorthodox knowledge; on the other hand, observers have warned about the segregating effects of new technologies. A ?digital divide“ has been opened between privileged users and the underprivileged masses, according to these more cautious voices. This divide has caused social deprivation and disintegration amongst the most vulnerable groups, in particular, older people, economically insecure groups and immigrants. Thus, various media life-styles establish a continuum between a media and information elite on the one end and the entertainment under-class on the other. Semi structured interviews with young Turks in Vienna show the positive and negative effects of playing Online Role Playing Games on the Internet in opposition to so-called Social Network Sites such as Netlog.  相似文献   
818.
The aim of the present article is to study how women's alcohol consumption has been defined and contested in the Swedish press from 1955 to 2010 in relation to the development of Swedish society from a social democratic welfare state to a neoliberal competition state. Our material consists of articles published in the largest Swedish national and regional newspapers in 1955, 1965, 1977, 1982, 1995, 2004, and 2010. In the study, we apply Fraser's concepts of recognition and redistribution to analyse how the press contributed to the formation of cultural injustices and counter-claims through its recognition of women's drinking, and how these cultural injustices and counter-claims have conditioned the redistribution of societal resources. Our analysis shows that, during the study period, women were recognized in the Swedish press in limited and stigmatizing subject positions. These dominating representations of drinking women changed over time in an unpredictable way. As collectively shared, widely accepted cultural images, they tended to downplay the possibility of women achieving equal and just participation in cultural interaction, social activities, and healthcare services. In counter-discourses, the possibilities for women to formulate public claims in order to make surrounding structures more “enabling” of their independency, weakened during the study period.  相似文献   
819.
This paper is an assessment of the impact of child support enforcement and welfare policies on nonmarital teenage childbearing and motherhood. We derive four hypotheses about the effects of policies on nonmarital teenage childbearing and motherhood. We propose that teenage motherhood and school enrollment are joint decisions for teenage girls. Based on individual trajectories during ages 12–19, our analysis uses an event history model for nonmarital teenage childbearing and a dynamic model of motherhood that is jointly determined with school enrollment. We find some evidence that child support policies indirectly reduce teen motherhood by increasing the probability of school enrollment, which, in turn, reduces the probability of teen motherhood. This finding suggests that welfare offices may wish to place greater weight on outreach programs that inform more teenagers of the existence of strong child support enforcement measures. Such programs might reduce nonmarital teen motherhood further and thus reduce the need for welfare support and child support enforcement in the long run.
Lingxin HaoEmail:
  相似文献   
820.
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