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   17055篇
  免费   482篇
  国内免费   188篇
管理学   1536篇
劳动科学   2篇
民族学   120篇
人才学   1篇
人口学   670篇
丛书文集   984篇
理论方法论   603篇
综合类   8734篇
社会学   2478篇
统计学   2597篇
  2024年   25篇
  2023年   157篇
  2022年   137篇
  2021年   190篇
  2020年   345篇
  2019年   427篇
  2018年   511篇
  2017年   560篇
  2016年   499篇
  2015年   559篇
  2014年   857篇
  2013年   2357篇
  2012年   1201篇
  2011年   1065篇
  2010年   852篇
  2009年   810篇
  2008年   948篇
  2007年   1025篇
  2006年   963篇
  2005年   838篇
  2004年   724篇
  2003年   614篇
  2002年   510篇
  2001年   393篇
  2000年   279篇
  1999年   164篇
  1998年   88篇
  1997年   98篇
  1996年   90篇
  1995年   68篇
  1994年   62篇
  1993年   56篇
  1992年   44篇
  1991年   22篇
  1990年   29篇
  1989年   33篇
  1988年   24篇
  1987年   23篇
  1986年   21篇
  1985年   14篇
  1984年   15篇
  1983年   7篇
  1982年   6篇
  1981年   9篇
  1980年   2篇
  1979年   1篇
  1978年   1篇
  1977年   1篇
  1975年   1篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
21.
In relation to mental health, it is clear that medicalized underpinnings,the provision of a clinically orientated evidence base for practiceand the need to contain ‘risk’ continue to be prioritized,particularly when compulsory intervention is considered. Thisis despite the increasing influence of a citizenship and socialjustice agenda which is being promoted by psychiatrists involvedin the development of ‘postpsychiatry’, as wellas by service users/survivors. These drivers are not mutuallyexclusive, but in the context of compulsory treatment, thereare clear tensions. In this article, the policy surroundingmental health and compulsory intervention in Australia and inEngland and Wales is explored. In the context of this discussion,three ways in which current government policy can be interpretedare examined and links made between these interpretations anddifferent ways of viewing the relationship between mental healthand community capacity building. With regard to social workpractice, it is argued that a response to mental ill healthwhich concentrates on an individualized ‘diagnose andtreat’ approach, which particularly comes to the foreat times of compulsory intervention, has limited capacity tofacilitate community engagement, foster social inclusion andgenerate reciprocal dynamics between positive mental healthand community capacity building.  相似文献   
22.
To ascertain the viability of a project, undertake resource allocation, take part in bidding processes, and other related decisions, modern project management requires forecasting techniques for cost, duration, and performance of a project, not only under normal circumstances, but also under external events that might abruptly change the status quo. We provide a Bayesian framework that provides a global forecast of a project's performance. We aim at predicting the probabilities and impacts of a set of potential scenarios caused by combinations of disruptive events, and using this information to deal with project management issues. To introduce the methodology, we focus on a project's cost, but the ideas equally apply to project duration or performance forecasting. We illustrate our approach with an example based on a real case study involving estimation of the uncertainty in project cost while bidding for a contract.  相似文献   
23.
Consider a website and the surfers visiting its pages. A typical issue of interest, for example while monitoring an advertising campaign, concerns whether a specific page has been designed successfully, i.e. is able to attract surfers or address them to other pages within the site. We assume that the surfing behaviour is fully described by the transition probabilities from one page to another, so that a clickstream (sequence of consecutively visited pages) can be viewed as a finite-state-space Markov chain. We then implement a variety of hierarchical prior distributions on the multivariate logits of the transition probabilities and define, for each page, a content effect and a link effect. The former measures the attractiveness of the page due to its contents, while the latter signals its ability to suggest further interesting links within the site. Moreover, we define an additional effect, representing overall page success, which incorporates both effects previously described. Using WinBUGS, we provide estimates and credible intervals for each of the above effects and rank pages accordingly.  相似文献   
24.
This report summarizes the proceedings of a conference on quantitative methods for assessing the risks of developmental toxicants. The conference was planned by a subcommittee of the National Research Council's Committee on Risk Assessment Methodology 4 in conjunction with staff from several federal agencies, including the U.S. Environmental Protection Agency, U.S. Food and Drug Administration, U.S. Consumer Products Safety Commission, and Health and Welfare Canada. Issues discussed at the workshop included computerized techniques for hazard identification, use of human and animal data for defining risks in a clinical setting, relationships between end points in developmental toxicity testing, reference dose calculations for developmental toxicology, analysis of quantitative dose-response data, mechanisms of developmental toxicity, physiologically based pharmacokinetic models, and structure-activity relationships. Although a formal consensus was not sought, many participants favored the evolution of quantitative techniques for developmental toxicology risk assessment, including the replacement of lowest observed adverse effect levels (LOAELs) and no observed adverse effect levels (NOAELs) with the benchmark dose methodology.  相似文献   
25.
Risks from exposure to contaminated land are often assessed with the aid of mathematical models. The current probabilistic approach is a considerable improvement on previous deterministic risk assessment practices, in that it attempts to characterize uncertainty and variability. However, some inputs continue to be assigned as precise numbers, while others are characterized as precise probability distributions. Such precision is hard to justify, and we show in this article how rounding errors and distribution assumptions can affect an exposure assessment. The outcome of traditional deterministic point estimates and Monte Carlo simulations were compared to probability bounds analyses. Assigning all scalars as imprecise numbers (intervals prescribed by significant digits) added uncertainty to the deterministic point estimate of about one order of magnitude. Similarly, representing probability distributions as probability boxes added several orders of magnitude to the uncertainty of the probabilistic estimate. This indicates that the size of the uncertainty in such assessments is actually much greater than currently reported. The article suggests that full disclosure of the uncertainty may facilitate decision making in opening up a negotiation window. In the risk analysis process, it is also an ethical obligation to clarify the boundary between the scientific and social domains.  相似文献   
26.
Current status data arise when the death of every subject in a study cannot be determined precisely, but is known only to have occurred before or after a random monitoring time. The authors discuss the analysis of such data under semiparametric linear transformation models for which they propose a general inference procedure based on estimating functions. They determine the properties of the estimates they propose for the regression parameters of the model and illustrate their technique using tumorigenicity data.  相似文献   
27.
This paper provides an overview of retirement patterns in Hong Kong on the basis of limited data. A censored regression model is used to infer the retirement age from people‘s current retirement status and their current age. This model is equivalent to a restricted probit model, and the interpretation of parameters is straightforward. The results clearly show a negative income effect on the retirement decision. The retirement age seems to be positively related to lifetime earnings but negatively related to the rate of decline of earnings with age. JEL classification: C24, J14, J26 Received May 6, 1996 / Accepted February 5, 1997  相似文献   
28.
数字经济时代,数字贫困问题对农户收入差距的影响引发新的关注。基于2021年中国农村经济与农村金融数据,采用再中心化响应函数(RIF)回归方法探究数字素养对农户收入差距的影响。研究发现:(1)数字素养显著扩大了农户收入差距,并具备明显的马太效应,高数字素养能够攫取更多数字红利,而低数字素养更容易陷入“数字贫困”状态,无法发挥出数字经济的增收效应。(2)应用数字素养会显著加剧农户收入差距,而通用数字素养对农户收入差距的影响并不显著。这种情况也得以印证,现阶段数字“接入鸿沟”已经得以解决,数字“应用鸿沟”差距逐渐凸显。(3)数字素养能够缩小农户财产性收入差距,但会显著扩大工资性收入差距与非农经营性收入差距。脱贫地区受到数字素养的马太效应更强,农户收入差距明显加剧。研究结论证实了我国农村内部存在明显的数字鸿沟,同时数字贫困问题加剧了农户收入差距。新发展阶段我国数字乡村战略的推进不仅要注重农村低收入群体以及弱势群体数字素养的培育,更要加快构建农村数字经济的包容性发展路径,助力农民农村共同富裕的实现。  相似文献   
29.
为探究儿童丧亲主题绘本的疗愈效用,以哀伤辅导理论为指导框架对《小伤疤》等9本丧亲主题绘本进行叙事分析。研究发现,丧亲主题绘本多数都构建了完整的哀伤历程,分为5个阶段:“故事开端:叙述过去映射正向情感联结;第一次转折:以委婉言语表达死亡事实;情绪高潮:主人公强烈宣泄负面情绪;第二次转折:寻求超越死亡的生命意义;故事结尾:与过去挥手告别开启新生活。”但仍存在一些不足之处可以优化。例如,绘本创作要直面亲人死亡的生物性事实,建构亲人“永生”的现实意义,结合中国本土文化进行创新。作为家长及教育工作者,要关注丧亲儿童的心理健康,灵活运用绘本对儿童进行死亡教育,帮助丧亲儿童走出哀伤。  相似文献   
30.
随着网络短视频在日常生活中的广泛渗透,以“爸爸带娃”为主题的家庭父职生活也逐渐媒介化。以微信视频号、小红书和抖音三大主流网络平台的短视频为研究对象,采用内容分析法,探究媒介再现父职中的“新父亲”形象,以及媒介再现父职隐含的父职教育契机。研究发现:媒介再现父职以“关爱父职”为主导,关爱父职影响积极且效果良好;父亲参与意愿和参与主动性强;父亲参与的互动性较为充分;平等、亲和、睿智的父亲形象突出;引流变现下的“花式带娃”等多样化“新父亲”形象。鉴于网络传播的巨大影响力和实效性,媒介再现父职的促进路径为:推动新父职理念的传播与实践转向;设立常人榜样,实现父职教育的日常渗透;明确本土化父职研究方向,拓展父亲情感参与维度。  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