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   965篇
  免费   67篇
  国内免费   1篇
管理学   283篇
民族学   5篇
人口学   33篇
丛书文集   5篇
理论方法论   106篇
综合类   5篇
社会学   506篇
统计学   90篇
  2023年   6篇
  2021年   5篇
  2020年   16篇
  2019年   20篇
  2018年   21篇
  2017年   32篇
  2016年   38篇
  2015年   31篇
  2014年   22篇
  2013年   163篇
  2012年   31篇
  2011年   27篇
  2010年   23篇
  2009年   22篇
  2008年   26篇
  2007年   40篇
  2006年   24篇
  2005年   24篇
  2004年   25篇
  2003年   28篇
  2002年   20篇
  2001年   23篇
  2000年   16篇
  1999年   13篇
  1998年   24篇
  1997年   18篇
  1996年   16篇
  1995年   18篇
  1994年   16篇
  1993年   14篇
  1992年   20篇
  1991年   17篇
  1990年   14篇
  1989年   14篇
  1988年   13篇
  1987年   10篇
  1986年   7篇
  1985年   13篇
  1984年   15篇
  1983年   11篇
  1982年   9篇
  1981年   8篇
  1980年   12篇
  1979年   13篇
  1978年   11篇
  1977年   7篇
  1976年   6篇
  1975年   5篇
  1971年   5篇
  1970年   4篇
排序方式: 共有1033条查询结果,搜索用时 46 毫秒
51.
The current study examined the moderating role of coping strategies on psychological outcomes at varying levels of parental support in a sample of clinically anxious youth. Youth (N?=?174, mean age 11.89) completed the Children’s Coping Strategies Checklist, Child and Adolescent Social Support Scale, Multidimensional Anxiety Scale for Children and Children’s Depression Inventory. Data was gathered at a large, university-based anxiety disorders treatment clinic. This nonexperimental design analyzed the use of active and avoidant coping strategies as a moderator of anxiety and depression, while controlling for parental support. Results revealed active coping strategies did moderate the relationship between parental support and anxiety, however, not as expected while the significant moderation role of avoidance coping was mixed. Findings showed that anxious youth with more parental support and more active coping were at risk for higher levels of anxiety, yet protected from higher depression. Avoidant coping strategies did moderate in a manner that was predicted for higher anxiety symptoms. Results suggest increased need for parental involvement in the treatment of anxiety disorders in youth.  相似文献   
52.
53.
From the Editors     
Tony Cox  Karen Lowrie 《Risk analysis》2013,33(8):1383-1384
  相似文献   
54.
How can we best allocate limited defensive resources to reduce terrorism risks? Dillon et al.'s Antiterrorism Risk-Based Decision Aid (ARDA) system provides a useful point of departure for addressing this crucial question by exhibiting a real-world system that calculates risk reduction scores for different portfolios of risk-reducing countermeasures and using them to rank-order different possible risk mitigation alternatives for Navy facilities. This comment points out some potential limitations of any scoring system that does not take into account risk externalities, interdependencies among threats, uncertainties that are correlated across targets, and attacker responses to alternative allocations of defensive resources. In at least some simple situations, allocations based on risk reduction scores and comparisons can inadvertently increase risks by providing intelligent attackers with valuable information, or they can fail to reduce risks as effectively as nonscoring, optimization-based approaches. These limitations of present scoring methods present exciting technical challenges and opportunities for risk analysts to develop improved methods for protecting facilities and infrastructure against terrorist threats.  相似文献   
55.
Summary.  Square contingency tables with matching ordinal rows and columns arise in particular as empirical transition matrices and the paper considers these in the context of social class and income mobility tables. Such tables relate the socio-economic position of parents to the socio-economic position of their child in adulthood. The level of association between parental and child socio-economic position is taken as a measure of mobility. Several approaches to analysis are described and illustrated by UK data in which interest focuses on comparisons of social class and income mobility tables that are derived from the same individuals. Account is taken of the use of the same individuals in the two tables. Additionally comparisons over time are considered.  相似文献   
56.
If a specific biological mechanism could be determined by which a carcinogen increases lung cancer risk, how might this knowledge be used to improve risk assessment? To explore this issue, we assume (perhaps incorrectly) that arsenic in cigarette smoke increases lung cancer risk by hypermethylating the promoter region of gene p16INK4a, leading to a more rapid entry of altered (initiated) cells into a clonal expansion phase. The potential impact on lung cancer of removing arsenic is then quantified using a three‐stage version of a multistage clonal expansion (MSCE) model. This refines the usual two‐stage clonal expansion (TSCE) model of carcinogenesis by resolving its intermediate or “initiated” cell compartment into two subcompartments, representing experimentally observed “patch” and “field” cells. This refinement allows p16 methylation effects to be represented as speeding transitions of cells from the patch state to the clonally expanding field state. Given these assumptions, removing arsenic might greatly reduce the number of nonsmall cell lung cancer cells (NSCLCs) produced in smokers, by up to two‐thirds, depending on the fraction (between 0 and 1) of the smoking‐induced increase in the patch‐to‐field transition rate prevented if arsenic were removed. At present, this fraction is unknown (and could be as low as zero), but the possibility that it could be high (close to 1) cannot be ruled out without further data.  相似文献   
57.
This article discusses the experience of place in a profoundly divided urban area of Sheffield. At a time when the gap between affluence and poverty has reached its widest point since the 1960s, this article explores the relationship between individuals and their sense of place and of the trenchant divisions separating communities. The study employs various methods but centres upon the use of hand-drawn maps; creating a dialogue between the interviewers and a number of local residents. These maps and the accompanying commentaries demonstrate the diverse individual sense of a particular place and a dialectical sense of space. The resulting picture is one of both the persistence of historical divisions, suggesting regulation and control through planning and policing, but also of complex entanglements of social identities, habitus and place which defy easy categorisation.  相似文献   
58.
This article details the “journey box” project process enacted by two elementary preservice teacher cohorts. Engaging in activities and projects that promote a sense of investment in not only consuming but producing historical narratives, preservice teachers potentially become interested in sharing this type of learning with their students.  相似文献   
59.
The structure of employee attitudes to safety: A European example   总被引:1,自引:0,他引:1  
This paper concerns organizational safety culture and the structure or architecture of employee attitudes to safety as part of that culture. It begins by reviewing the somewhat scant literature relevant to this area, and then reports a study, conducted in a European company, which collected and factor analysed data on employee attitudes to safety. The framework provided for the study was that offered by Purdham (1984), and the results suggested that employees' attitudes to safety, within this company (across occupation/occupational level and country), could be mapped By five orthogonal factors: personal scepticism, individual responsibility, the safeness of the work environment, the effectiveness of arrangements for safety, and personal immunity. The theoretical and practical implications of these findings are discussed, and attention is drawn to their subsequent use in an intervention to enhance safety culture within the organization by attacking supervisors' attitudes to safety.  相似文献   
60.
Siting Noxious Facilities: A Test of the Facility Siting Credo   总被引:2,自引:0,他引:2  
Over the past decade it has become increasingly difficult to site noxious facilities, despite the fact that there is a growing need to do so. To address this problem, a set of guidelines for a fairer, wiser, and more workable siting process—the Facility Siting Credo—was developed during a National Facility Siting Workshop in 1990. This paper presents an empirical test of these guidelines. A questionnaire based on the Credo was completed by stakeholders in 29 waste facility siting cases, both successful and unsuccessful, across the United States and Canada. Using an independent determination of outcome (success), a preliminary ranking of the importance of various Credo principles was obtained. The data reveal that establishing trust between the developer and host community is an important factor in facilitating the siting process. The siting process is most likely to be successful when the community perceives the facility design to be appropriate and to satisfy its needs. Public participation also is seen to be an important process variable, particularly if it encourages a view that the facility best meets community needs. Moreover, a siting process where communities volunteer to host facilities is an approach that holds promise for meeting many of these key success criteria.  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