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   16023篇
  免费   214篇
  国内免费   1篇
管理学   2167篇
民族学   83篇
人口学   1405篇
丛书文集   51篇
教育普及   1篇
理论方法论   1415篇
综合类   152篇
社会学   7936篇
统计学   3028篇
  2023年   105篇
  2022年   67篇
  2021年   124篇
  2020年   317篇
  2019年   436篇
  2018年   497篇
  2017年   630篇
  2016年   477篇
  2015年   326篇
  2014年   466篇
  2013年   2785篇
  2012年   598篇
  2011年   551篇
  2010年   394篇
  2009年   319篇
  2008年   438篇
  2007年   396篇
  2006年   424篇
  2005年   339篇
  2004年   332篇
  2003年   281篇
  2002年   300篇
  2001年   364篇
  2000年   329篇
  1999年   306篇
  1998年   258篇
  1997年   208篇
  1996年   218篇
  1995年   234篇
  1994年   192篇
  1993年   210篇
  1992年   244篇
  1991年   233篇
  1990年   224篇
  1989年   206篇
  1988年   183篇
  1987年   161篇
  1986年   191篇
  1985年   201篇
  1984年   173篇
  1983年   157篇
  1982年   128篇
  1981年   107篇
  1980年   119篇
  1979年   144篇
  1978年   104篇
  1977年   89篇
  1976年   72篇
  1975年   76篇
  1974年   70篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
961.
962.
Venturing Jointly: Vienna's Innovation Economy   总被引:1,自引:0,他引:1  
Vienna's role as Austria's largest innovative city-region depends upon many factors, of which a vibrant regional innovation system driven by joint research ventures is a key component. Between 1994 and 2002, various research groups located in the Vienna region participated in 7,334 research projects funded by the EU during the 4th and 5th Framework Programs. Organizations from this region were more likely than elsewhere in Austria to assume scientific leadership positions as project coordinators. The region specialized heavily in research concerning environment, information and communication technology, bio-technology, traffic, and general research topics. The region's most active organizations were concentrated in the city itself: universities, research organizations, small firms, and large firms were represented in a ratio of approximately 4:2:1:1. Among firms that participated, the largest ones dominated during the course of this period, although research participation by firms continually shifted more to small- and medium-sized enterprises. In terms of Austria, most research is concentrated in the about 30 most active postal-code zones, which in turn are dominated by the Vienna region. Over the full period, there is no evidence that Austrian research projects concentrated further and some types of research decentralized slightly. At the same time, the research participation of small- and medium-sized enterprises became more centralized within the Vienna region. The singular importance of stimulating further and more effective research in the Vienna region and its innovation system is obvious and these findings may be helpful in establishing policies that support key organizations, improve research infrastructure, and further stimulate the city's knowledge-generating system to ensure long-term innovation possibilities.  相似文献   
963.
Abstract.  An optimal Bayesian decision procedure for testing hypothesis in normal linear models based on intrinsic model posterior probabilities is considered. It is proven that these posterior probabilities are simple functions of the classical F -statistic, thus the evaluation of the procedure can be carried out analytically through the frequentist analysis of the posterior probability of the null. An asymptotic analysis proves that, under mild conditions on the design matrix, the procedure is consistent. For any testing hypothesis it is also seen that there is a one-to-one mapping – which we call calibration curve – between the posterior probability of the null hypothesis and the classical bi p -value. This curve adds substantial knowledge about the possible discrepancies between the Bayesian and the p -value measures of evidence for testing hypothesis. It permits a better understanding of the serious difficulties that are encountered in linear models for interpreting the p -values. A specific illustration of the variable selection problem is given.  相似文献   
964.
In many developing regions, women and young girls spend several hours daily in the collection of natural resources. Still the link between these household resource strategies and stakeholder perceptions of development priorities remains unexplored. This project examines this association with survey data representative of the adult population from Ghana’s Coastal Region. Although natural resource scarcity and the sustainability of resource use represent key development challenges, there are others (e.g., energy, sanitation, employment, and educational opportunities). As such, even in the face of natural resource scarcity, individuals may place greater importance on other dimensions of development, especially if household resource strategies are perceived as relatively efficient. The analytical focus here is on water and the results suggest that gender roles shape household water collection strategies, while also shaping these strategies’ perceived opportunity costs. Specifically, Ghanian adults more often see drinking water provision as their primary development need when water sources are distant and/or when male household members collect water (particularly male heads). In the end, I argue that social science inquiry benefits by contextualizing social dynamics within environmental context, particularly within cultural settings in which human subsistence is intimately tied to the state of the natural environment.  相似文献   
965.
966.
While migration in South Africa has been studied on a broad canvas, there have been few accounts of children's migration and the effects on living conditions and wellbeing. This article compares the access to services, housing and household amenities, and family characteristics of children born in the Greater Johannesburg metropolis with those of in-migrant children. The article also examines other indicators of child wellbeing related to parental care and schooling. In-migrant children, particularly children who have lived previously in rural areas and/or have recently migrated into the city, are significantly disadvantaged in comparison to long-term resident children in terms of parental education and occupation, housing type and ownership, access to electricity, refuse removal, water and sanitation. In-migrant children also live in households that are less likely to have amenities such as a refrigerator, television, washing machine, telephone and motor vehicle. In terms of child indicators, in-migrant children enjoy less frequent parental contact and are twice as likely to start school later than resident children. Whilst urbanisation to South Africa's metropolitan centres is generally associated with several widely recognised benefits, for children, these benefits may be tempered by the disadvantages of in-migrant families known to be associated with child wellbeing.  相似文献   
967.
D. E. Super's (1957) theory of career development has long been of interest to careers researchers (M. Savickas, 1994; S. C. Whiston & B. K. Brecheisen, 2002). Its insightful illustration of career stages has made it widely applied by careers practitioners. Image norms may influence the career decisions and developmental tasks inherent in each stage. An image norm is the belief that individuals must present or possess a certain image, consistent with occupational, organizational, or industry standards, in order to achieve career success. Understanding the effects of image norms across D. E. Super's (1957) career stages has important implications for individuals, organizations, and career counseling professionals.  相似文献   
968.
The difficulties associated with conducting valid family therapy research within a clinical practice discourage many potential researchers. This article will describe collaboration between a group of academics, researchers and clinicians who decided to explore the process and efficacy of systemic family therapy conducted within a working private practice. The specific questions we are addressing are, whether the requests clients bring to their first session of therapy can be reliably classified by practitioners, whether these requests change over time, and whether the nature of the request is associated with therapist and client ratings of therapeutic outcome. Additional questions about the form and nature of the therapeutic alliance as experienced by both client and practitioner are also being explored. This paper will map the passage of the work from inception to its current state where over 140 clients are active participants. In doing so attention will be paid to the obstacles encountered: practical, financial and ethical, and the solutions devised to address these.  相似文献   
969.
This article describes aspects of the treatment of an adult child of a schizophrenic parent. Many theories on irrationality in the family setting illuminate the range of impingement on the child's reality when a parent is disturbed in this way. Current research has absorbed itself in interpretations of data on risk, vulnerability, disorder, and early trauma, which have implications for prevention as well as therapeutic treatment of the adult survivor. Profound effects on Ms. P's early development are elaborated in the therapy, in which the treatment stance is influenced by Kohut's theories of the self, particularly as applied to the establishment within the holding environment of specific transferences that facilitate reconstructive work.  相似文献   
970.
The purpose of this study is to use analysis of covariance to examine variations in time use among single-parent, one-earner, and two-earner families and to assess the effects of two covariates, Age of the Younger Child and Hours of Employment of the Homemaker, on total family time spent on household tasks. Data were collected from 81 single-parent and 210 two-parent California households using a questionnaire, time chart, and personal interviews. The greatest discrepancy between single-parent and two-parent families is that single-parent families spend significantly less time than two-parent families on Maintenance of the home and yard and on Nonphysical Care (social interaction with family members). One-earner families spend almost as much time as two-earner families on Nonphysical Care, but only when Secondary Time is included. Two household activities, Clothing Care and Management, are not affected by either family type or the covariates.This study utilized data from USDA Regional Research Project NE-113, An Urban-Rural Comparison of Families' Time Use.Jeanne M. Hilton is an Assistant Professor of Family Economics and Management, Department of Human Development and Family Studies, University of Nevada, Reno, NV 89557. She received her Ph.D. from Oregon State University. Her current research interests include work and family issues within the context of family structure.  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