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   1521篇
  免费   55篇
管理学   204篇
民族学   20篇
人口学   132篇
丛书文集   12篇
理论方法论   136篇
现状及发展   1篇
综合类   12篇
社会学   848篇
统计学   211篇
  2023年   12篇
  2022年   8篇
  2021年   20篇
  2020年   34篇
  2019年   40篇
  2018年   54篇
  2017年   54篇
  2016年   47篇
  2015年   39篇
  2014年   40篇
  2013年   299篇
  2012年   56篇
  2011年   65篇
  2010年   41篇
  2009年   39篇
  2008年   62篇
  2007年   40篇
  2006年   41篇
  2005年   35篇
  2004年   31篇
  2003年   29篇
  2002年   41篇
  2001年   32篇
  2000年   28篇
  1999年   25篇
  1998年   20篇
  1997年   12篇
  1996年   21篇
  1995年   24篇
  1994年   19篇
  1993年   10篇
  1992年   12篇
  1991年   18篇
  1990年   19篇
  1989年   14篇
  1988年   11篇
  1987年   12篇
  1986年   8篇
  1985年   19篇
  1984年   11篇
  1983年   14篇
  1982年   16篇
  1981年   14篇
  1980年   12篇
  1979年   12篇
  1978年   9篇
  1976年   11篇
  1975年   9篇
  1974年   6篇
  1972年   5篇
排序方式: 共有1576条查询结果,搜索用时 93 毫秒
731.
As the environment within which organizations act continues to change and becomes increasingly competitive, maintaining an organizational climate that supports change and encourages creativity is a key objective for organizational leaders. This article examines the relationship between leadership style (transformational, transactional, laissez‐faire) and members' perceptions of the psychological climate for organizational change readiness and psychological climate for organizational creativity. Results indicate that transformational leaders have a direct positive relationship with psychological climate for organizational change readiness and organizational creativity, while laissez‐faire leaders have a negative relationship.  相似文献   
732.
Applying a consistent historical theme throughout a social studies course is an effective long-term planning strategy that can promote student engagement, retention of information, and contextualized knowledge of history's continuity and change. This article demonstrates how one such theme, power and liberty, might be incorporated into a secondary American history course. Teachers should introduce the theme early in the course using questions designed to help the students define and understand the parameters of power and liberty as a lens through which the past might be viewed. A subsequent and repeated application of consistent scaffolding questions to events in American history promotes the analysis of how those events changed the balance of power and liberty for individuals and various groups in society. Armed with this contextualized knowledge, students can then apply the theme of power and liberty as another approach to the examination of current events in American society.  相似文献   
733.
Companies undertaking operations improvement in supply chains face many alternatives. This work seeks to assist practitioners to prioritize improvement actions by developing analytical expressions for the marginal values of three parameters – (i) lead time mean, (ii) lead time variance, and (iii) demand variance – which measure the marginal cost of an incremental change in a parameter. The relative effectiveness of reducing lead time mean versus lead time variance is captured by the ratio of the marginal value of lead time mean to that of lead time variance. We find that this ratio strongly depends on whether the lead time mean and variance are independent or correlated. We illustrate the application of the results with a numerical example from an industrial setting. The insights can help managers determine the optimal investment decision to modify demand and supply characteristics in their supply chain, e.g., by switching suppliers, factory layout, or investing in information systems.  相似文献   
734.
We used path analysis to investigate the impact of parental divorce on God image, mediated by father–child and mother–child attachments, among 178 college students at a Christian university. Findings revealed that parental divorce negatively impacts father–child attachment; however, father–child attachment does not impact God image. Instead, the quality of mother–child attachment, which does not seem to be influenced by parental divorce, best predicts the development of a healthy God image. Thus, preliminary findings elucidated that parental divorce undermines the quality of attachment between father and child but not mother and child, and mother–child attachment ultimately influences God image. Further research is needed to replicate and generalize these preliminary findings.  相似文献   
735.
The Banks set (1(4):295–306, 1985) is one of the more important concepts in voting theory since it tells us about the sophisticated outcomes of standard amendment voting procedures commonly in use throughout the English speaking world (and elsewhere as well). While the properties of the Banks set for finite voting games have been extensively studied, little is known about how to find members of this set for majority rule spatial voting games involving possibly infinite agendas. We look at this question for two-dimensional games where voters have Euclidean preferences, and offer a variety of new results that delimit areas of the space that can be shown to lie within the Banks set, such as the Schattschneider set, the tri-median set, and the Banks line set—geometric constructs which we show to be nested within one another.  相似文献   
736.
The profession of social work places a strong emphasis on the utilization of theories in classroom settings as well as in clinical milieus. Therefore, it is understandable that social work students, scholars, researchers, and practitioners feel compelled to make sense of theoretical underpinnings in their professional lives. This study sought to develop an instrument to critically appraise social work theories. Through Qualtrics, a panel of 14 internationally recognized experts in social work theories assessed the content of 16 items, which emanated from the literature on scale development. All of these items were described in accordance with Lawshe’s (1975) content-validity framework. Nine of the original 16 criteria survived expert scrutiny to constitute the Theory Evaluation Scale. Coherence, conceptual clarity, philosophical assumptions, connection with previous research, testability, empiricism, limitations, client context, and human agency were the final criteria on the empirically supported instrument. Implications for research, practice, and social work education are discussed.  相似文献   
737.
Abstract

Although Australia is experiencing a shortage of foster carers, there is currently little understanding of why people do not become carers. This study explores the reasons given for not fostering though a survey of 897 non carers. Results indicate that, at the aggregate level, people do not become carers because they do not know anything about fostering, or because they are busy with their own children, work, or commitments to family and friends. However, if we account for heterogeneity, differences in these barriers are observed for subgroups within the sample. We investigate the structure of the market of potential foster carers by segmenting the market using cultural background as the segmentation base. Results indicate that the reasons for not fostering differ depending on the subgroup being examined. Theoretically, this suggests that heterogeneity exists within the foster care market, and that examining barriers to foster care only at the aggregate level neglects the importance of individual subsegment characteristics. Practically, results are important because they suggest that generic marketing campaigns aimed at the entire community have limited effect and that customised strategies are required to attract the particular types of carers most needed.  相似文献   
738.
Abstract

Objective: To identify college presidents’ support for tobacco-free campus policies (TFCP), perceived barriers and benefits to implementing such policies, and activities that might initiate policy adoption. Participants: Participants were 405 presidents (51% of 796 delivered surveys) from a national sample of eligible 4-year institutions in summer 2012. Methods: A 4-page, 24-item cross-sectional questionnaire was mailed to potential participants in 4 waves to maximize the response rate. Results: The vast majority of presidents support TFCP (84%) and believed they should play a key role in establishing TFCP (80%). A majority agreed advocacy by campus groups was necessary to establishing TFCP. Presidents with an existing policy were twice as likely to believe advocacy was necessary for policy establishment. Presidents most commonly selected creating policy drafts and designating a committee as important to initiating TFCP. Conclusion: Advocates would benefit from focusing on presidential involvement and solutions to personnel barriers in establishing TFCP.  相似文献   
739.
Abstract

Objective: This case study examined the effects of an early intervention program designed to respond to residential college students demonstrating risk for suicide. Participants: Participants were 108 undergraduates at a large northeastern public university referred to an early intervention program subsequent to presenting with risk factors for suicide between Fall 2004 and Spring 2011. Methods: Data were collected from archival records to examine quality of early intervention services, student retention, and grade point average (GPA) during the semesters prior to, during, and subsequent to the referral incident. Results: Program implementation was timely and responsive to student needs; students successfully completing the early intervention program remained in school and demonstrated small but significant rebounds in GPA the semester subsequent to the incident. Conclusions: There are benefits associated with the implementation of early intervention programs designed to respond to students manifesting risk for suicide, such as connecting the student to vital services and support networks.  相似文献   
740.
Abstract

Objective: Sleep problems and alcohol misuse are common issues experienced by college students that can have detrimental effects on overall health. Previous work indicates a strong relationship between poor sleep quality and alcohol risk in this population. This study explored the moderating effect of drinking motives in the relationship between global sleep quality and experience of alcohol-related negative consequences. Participants: College students (N = 1,878) who reported past-month drinking. Methods: Participants completed online surveys assessing sleep and alcohol-related behaviors. Results: Poorer sleep quality and higher drinking motives (coping, conformity, and enhancement) predicted greater alcohol-related consequences, controlling for drinking. Further, coping motives moderated the relationship between sleep quality and consequences such that participants reporting poor sleep and high coping motives experienced heightened levels of consequences. Conclusions: These findings advance the understanding of the relationship between sleep problems and alcohol-related risk and provide implications for targeted campus-based health promotion interventions.  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