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   611篇
  免费   15篇
管理学   61篇
民族学   5篇
人口学   46篇
理论方法论   82篇
综合类   6篇
社会学   382篇
统计学   44篇
  2023年   6篇
  2022年   6篇
  2021年   15篇
  2020年   20篇
  2019年   32篇
  2018年   37篇
  2017年   36篇
  2016年   32篇
  2015年   18篇
  2014年   27篇
  2013年   112篇
  2012年   35篇
  2011年   28篇
  2010年   22篇
  2009年   9篇
  2008年   19篇
  2007年   17篇
  2006年   18篇
  2005年   15篇
  2004年   18篇
  2003年   10篇
  2002年   14篇
  2001年   9篇
  2000年   9篇
  1999年   8篇
  1998年   6篇
  1997年   5篇
  1996年   11篇
  1995年   2篇
  1994年   3篇
  1993年   3篇
  1992年   1篇
  1991年   1篇
  1990年   3篇
  1989年   2篇
  1988年   2篇
  1987年   1篇
  1986年   2篇
  1985年   2篇
  1984年   2篇
  1983年   1篇
  1980年   2篇
  1978年   2篇
  1975年   1篇
  1972年   1篇
  1969年   1篇
排序方式: 共有626条查询结果,搜索用时 9 毫秒
41.
We develop and evaluate a modeling approach for making periodic review production and distribution decisions for a supply chain in the processed food industry. The supply chain faces several factors, including multiple products, multiple warehouses, production constraints, high transportation costs, and limited storage at the production facility. This problem is motivated by the supply chain structure at Amy's Kitchen, one of the leading producers of natural and organic foods in the United States. We develop an enhanced myopic two‐stage approach for this problem. The first stage determines the production plan and uses a heuristic, and the second stage determines the warehouse allocation plan and uses a non‐linear optimization model. This two‐stage approach is repeated every period and incorporates look‐ahead features to improve its performance in future periods. We validate our model using actual data from one factory at Amy's Kitchen and compare the performance of our model to that of the actual operation. We find that our model significantly reduces both inventory levels and stockouts relative to those of the actual operation. In addition, we identify a lower bound on the total costs for all feasible solutions to the problem and measure the effectiveness of our model against this lower bound. We perform sensitivity analysis on some key parameters and assumptions of our modeling approach.  相似文献   
42.
The primary purpose of this study was to contrast the life satisfaction of midlife empty-nest and childless individuals. Seventy-two men and women reported on their satisfaction with 11 areas of life as well as with regard to children. Empty-nest individuals were more satisfied than childless persons with regard to their decisions regarding children; however, the childless individuals were not unhappy with their decisions. Empty-nest individuals were also more positive than childless individuals about contact with children. There were no differences between the two groups with regard to areas of life satisfaction not related to children; nor were there significant gender differences in life satisfaction. The results were discussed in relation to both theory and data concerning midlife satisfaction and adjustment.SMS AssociatesThe research was completed by James E. Bell in partial fulfillment of the requirement for the masters of counseling degree at Arizona State University.  相似文献   
43.
Julia S. Noland 《Infancy》2007,11(3):295-303
In searching for a toy hidden at a new location, infants will err by searching at the previously correct location. This study investigated the possibility that 8.5‐month‐old infants would perseverate on the basis of other visual features by which covers could be individuated. Infants saw a toy hidden under 1 of 2 distinctly shaped covers. Following successful retrievals from the Shape A cover, infants saw the toy hidden under the Shape B cover. On this B trial, the covers were at locations that had not been baited on the preceding trials, precluding location perseveration. The infants erred by choosing the unbaited Shape A cover more often than control infants presented with 1 type of cover throughout. The findings suggest that infants perseverate to cover shape and are form biases biased toward cover shape even when location information is sufficient to support retrieval.  相似文献   
44.
Welfare and criminal justice systems manifest different goals, cultures, values and working methods. In Australia, the welfare sector has a culture of empowerment and concern for victims’ rights, within which social workers focus on social justice and social change. In contrast, the criminal justice sector (police) is patriarchal and para-military in structure, focusing on enforcing and maintaining community order and safety. These differences can create tension when social workers and police need to work as partners in response to violence against women, in particular violence against women from bikie gangs. This article addresses the issue of partnerships between social workers and police when working with abused bikie-gang women. It presents the findings of recent research into social work practice with such women in South Australia, in conjunction with a brief exploration of the international literature on social work and police cultures, and partnerships. It concludes that whilst there is a great need for genuine collaboration and partnership between social workers and police in the complex context of domestic violence with links to organised crime, the cultures and mandates of these different professions make this difficult.  相似文献   
45.
46.
The authors present the psychology‐of‐working perspective (D. L. Blustein, 2006; N. Peterson & R. C. González, 2005; M. S. Richardson, 1993) as an alternative to traditional career development theories, which have primarily explored the lives of those with choice and volition in their working lives. The major historical and conceptual features of the psychology of working are reviewed, with a focus on how this framework provides a more inclusive and, ideally, more just vision for the career counseling field. Implications for career counseling and a case presentation are provided to examine how this new perspective can inform counseling practice. A brief overview of public policy implications concludes the article.  相似文献   
47.
American Indians and Alaska Natives (AI/AN) have a long tradition of military service, allying with Western forces in North America since the 1700s. It is hardly surprising, therefore, that AI/AN veterans experience higher rates of overall disability and service-related disability than veterans of other races and ethnicities. It is not clear, however, that AI/AN veterans with disabilities are receiving effective, culturally informed rehabilitation services. This article examines the incidence of disability among contemporary AI/AN veterans, considers barriers to effective treatment, and points out model programs tailored to the particular needs of this population, with attention to the historical and cultural context of AI/AN military service.  相似文献   
48.
VOLUNTAS: International Journal of Voluntary and Nonprofit Organizations - This research analyzes how gender equality influences the participation of European senior citizens in a range of...  相似文献   
49.
BackgroundAccording to the psychoanalytical literature, it is during pregnancy that maternal representations of the mother–infant relationship become activated. Midwives who are engaged with the mother and the baby have not drawn upon this concept in their practice. In order for this to happen, it is important to understand better the nature of maternal representations and when they are activated from empirical studies.QuestionThe research question is: what are the maternal representations of a group of first time mothers from pre-pregnancy, early pregnancy and to the first ultrasound.MethodA narrative approach was used to gain insight into the maternal representations of first time pregnant womens’ account of their representations. The analysis method was based on thematic approach.ParticipantsFifteen women aged between 23 and 38 years.SettingA midwives clinic attached to a tertiary hospital in Melbourne, Australia.FindingsFirst-time pregnant women's maternal representations were activated when a woman begins to plan her pregnancy (‘the time is right’), again at the onset of physical changes to her body as a result of conception (‘my body is changing’), and at the first early ultrasound at around twelve weeks (‘it’ is a real baby).ConclusionMaternal representations are important for the midwife and pregnant women because this concept provides another understanding in relation to the psychological dimension of pregnancy.  相似文献   
50.
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