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   668篇
  免费   34篇
管理学   108篇
民族学   2篇
人口学   56篇
丛书文集   1篇
理论方法论   90篇
综合类   2篇
社会学   377篇
统计学   66篇
  2023年   6篇
  2022年   7篇
  2021年   3篇
  2020年   19篇
  2019年   24篇
  2018年   17篇
  2017年   41篇
  2016年   31篇
  2015年   21篇
  2014年   33篇
  2013年   112篇
  2012年   28篇
  2011年   36篇
  2010年   23篇
  2009年   20篇
  2008年   20篇
  2007年   17篇
  2006年   12篇
  2005年   17篇
  2004年   14篇
  2003年   16篇
  2002年   24篇
  2001年   13篇
  2000年   7篇
  1999年   13篇
  1998年   7篇
  1997年   7篇
  1996年   6篇
  1995年   6篇
  1994年   5篇
  1993年   9篇
  1992年   12篇
  1991年   6篇
  1990年   8篇
  1989年   4篇
  1988年   4篇
  1987年   4篇
  1985年   2篇
  1984年   5篇
  1983年   8篇
  1982年   4篇
  1981年   5篇
  1980年   6篇
  1979年   2篇
  1978年   3篇
  1977年   4篇
  1976年   3篇
  1971年   2篇
  1968年   1篇
  1967年   1篇
排序方式: 共有702条查询结果,搜索用时 15 毫秒
11.
The American diet has changed substantially over the last few decades. These changes provide a test for social theory and have substantial effects on the demand for various food products, thus impacting U.S. agriculture. In this paper a rapidly growing dietary choice—vegetarianism—is explored. Prevalence of various forms of vegetarianism is estimated in a representative sample of a suburban population and factors that influence choice of a vegetarian diet are examined. About 7 percent of the sample report they are vegetarians. The prevalence of vegetarianism is not influenced by age, gender, or education, but individuals holding traditional values are less likely to be vegetarian than others. There also is some evidence mat individuals holding altruistic values are more likely than others to be vegetarians.  相似文献   
12.
Tree health is a critical parameter for evaluating urban ecosystem health and sustainability. Traditionally, this parameter has been derived from field surveys. We used multispectral remote sensing data and GIS techniques to determine tree health at the University of California, Davis. The study area (363 ha) contained 8,962 trees of 215 species. Tree health conditions were mapped for each physiognomic type at two scales: pixel and whole tree. At the pixel scale, each tree pixel within the tree crown was classified as either healthy or unhealthy based on vegetation index values. At the whole tree scale, raster based statistical analysis was used to calculate tree health index which is the ratio of healthy pixels to entire tree pixels within the tree crown. The tree was classified as healthy if the index was greater than 70%. Accuracy was checked against a random sample of 1,186 trees. At the whole tree level, 86% of campus trees were classified as healthy with 88% mapping accuracy. At the pixel level, 86% of the campus tree cover was classified as healthy. This tree health evaluation approach allows managers to identify the location of unhealthy trees for further diagnosis and treatment. It can be used to track the spread of disease and monitor seasonal or annual changes in tree health. Also, it provides tree health information that is fundamental to modeling and analysis of the environmental, social, and economic services produced by urban forests.  相似文献   
13.
Changes globally mean that there are now record numbers of mothers in paid employment and a reported prevalence of involved fathering. This poses challenges to mothers and fathers as they negotiate care–work practices within their relationships. Focusing on interviews with three heterosexual couples (taken from a wider UK qualitative project on working parents), the paper considers care–work negotiations of three couples, against a backdrop of debates about intensive mothering and involved fathering. It aims to consider different configurations of work and care within three different couple relationships. We found that power within the relationships was negotiated along differential axis of gender and working status (full- or part-time paid work). We present qualitatively rich insights into these negotiations. Framed by a critical discursive psychological approach, we call on other researchers to think critically about dominant discourses and practices of working, caring and parenting, pointedly how couples situated around the world operationalise these discourses in talking about themselves as worker and carers.  相似文献   
14.
This article describes the walking and moving of young children around places. It is based on an ethnographic study of children aged between 24 and 36 months visiting a museum. Drawing on Ingold's (2007) concept of wayfaring, the author argues movement through place creates embodied, tacit ways of knowing and experiencing the world. This embodied and tacit knowledge is not well‐accounted for in dominant models of how young children learn. In this study, wayfaring both enabled the children to learn about places and routes, and led to the development of traditions, in which collective meanings and actions were attached to particular locations.  相似文献   
15.
Sea levels are rising in many areas around the world, posing risks to coastal communities and infrastructures. Strategies for managing these flood risks present decision challenges that require a combination of geophysical, economic, and infrastructure models. Previous studies have broken important new ground on the considerable tensions between the costs of upgrading infrastructure and the damages that could result from extreme flood events. However, many risk-based adaptation strategies remain silent on certain potentially important uncertainties, as well as the tradeoffs between competing objectives. Here, we implement and improve on a classic decision-analytical model (Van Dantzig 1956) to: (i) capture tradeoffs across conflicting stakeholder objectives, (ii) demonstrate the consequences of structural uncertainties in the sea-level rise and storm surge models, and (iii) identify the parametric uncertainties that most strongly influence each objective using global sensitivity analysis. We find that the flood adaptation model produces potentially myopic solutions when formulated using traditional mean-centric decision theory. Moving from a single-objective problem formulation to one with multiobjective tradeoffs dramatically expands the decision space, and highlights the need for compromise solutions to address stakeholder preferences. We find deep structural uncertainties that have large effects on the model outcome, with the storm surge parameters accounting for the greatest impacts. Global sensitivity analysis effectively identifies important parameter interactions that local methods overlook, and that could have critical implications for flood adaptation strategies.  相似文献   
16.
This article extends the previous research of consecutive attacks strategy by assuming that an attacker observes the outcome of each attack imperfectly. With given probabilities it may wrongly identify a destroyed target as undestroyed, and wrongly identify an undestroyed target as destroyed. The outcome of each attack is determined by a contest success function that depends on the amount of resources allocated by the defender and the attacker to each attack. The article suggests a probabilistic model of the multiple attacks and analyzes how the target destruction probability and the attacker's relative resource expenditure are impacted by the two probabilities of incorrect observation, the attacker's and defender's resource ratio, the contest intensity, the number of attacks, and the resource distribution across attacks. We analyze how the attacker chooses the number of attacks, the attack stopping rule, and the optimal resource distribution across attacks to maximize its utility.  相似文献   
17.
18.
This article analyses evidence for each of the expected benefits of budget support in turn, and finds the biggest improvements in the pro‐poor nature of public expenditure and public financial management. More modest improvements are noted in the predictability of aid and the burden of transaction costs, while less is known about the real effects on domestic accountability. Underlying them all is an assessment that programmes are incapable of ‘buying’ reforms. Drawing on the analysis, seven areas are highlighted where budget support design can be strengthened vis‐à‐vis its original rationale.  相似文献   
19.
ABSTRACT

The purposes of this review article are to orient clinical social workers to cognitive-behavioral theory, intervention, and research on bipolar disorder (BD); identify pros and cons of applying cognitive-behavioral therapy (CBT) to social work clients with BD; and identify specific implications for clinical social work practice. Of the 545 articles that were obtained via the systematic review, 18 studies were identified as being potentially eligible for inclusion, and 9 of those studies ultimately satisfied the inclusion criteria. The results of each study were summarized via identifying statistically significant (p< .05) differences that existed between experimental cohorts who received CBT (plus pharmacotherapy) and control cohorts who received treatment as usual. Outcomes showed CBT cohorts as having significant improvement over their respective control groups. The review's implications for clinical social workers and the need for future research are discussed.  相似文献   
20.
Interdependence is a defining feature of close relationships, and alcohol use is one domain where one person’s motivations and behaviors can affect a partner’s well-being. Concern about partner drinking is a gauge that determines whether a partner’s alcohol use has the potential to be problematic to the relationship, and brief and efficient measurement of this construct can be used to serve clinicians, scientists, and practitioners. Across four studies (N = 1,807), we use item response theory analysis to present a 3-item brief screening tool assessing concern about partner drinking: Thinking about your Partner’s Drinking-3 (TPD-3). The TPD-3 revealed strong test–retest reliability and expected patterns of convergent, concurrent, and incremental validity with perceived partner drinking and alcohol-related consequences, behavioral responses to partner drinking, and relationship well-being. We present the TPD-3 as a useful screening tool and for measurement of concern about partner drinking when efficient assessment is desired.  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