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   1690篇
  免费   31篇
管理学   281篇
民族学   9篇
人口学   112篇
丛书文集   6篇
理论方法论   198篇
综合类   16篇
社会学   826篇
统计学   273篇
  2023年   12篇
  2022年   5篇
  2021年   10篇
  2020年   31篇
  2019年   52篇
  2018年   44篇
  2017年   59篇
  2016年   43篇
  2015年   45篇
  2014年   58篇
  2013年   273篇
  2012年   67篇
  2011年   58篇
  2010年   54篇
  2009年   45篇
  2008年   59篇
  2007年   54篇
  2006年   52篇
  2005年   52篇
  2004年   48篇
  2003年   44篇
  2002年   43篇
  2001年   40篇
  2000年   33篇
  1999年   37篇
  1998年   30篇
  1997年   31篇
  1996年   15篇
  1995年   22篇
  1994年   24篇
  1993年   11篇
  1992年   11篇
  1991年   17篇
  1990年   15篇
  1989年   7篇
  1988年   24篇
  1987年   15篇
  1986年   17篇
  1985年   14篇
  1984年   18篇
  1983年   15篇
  1982年   11篇
  1981年   21篇
  1980年   16篇
  1979年   13篇
  1978年   11篇
  1977年   6篇
  1976年   8篇
  1975年   9篇
  1974年   7篇
排序方式: 共有1721条查询结果,搜索用时 11 毫秒
51.
52.
Professional jazz has been organized around two contradictory cultures. Historically, the jazz art world has followed norms of meritocracy, which promote equality across boundaries of race and class. At the same time a culture of exclusivity, anchored in gendered essentialism, has severely limited female participation. By analyzing interview data with artists from the Hamilton College Jazz Archive, we illustrate how these contradictory cultures of inclusion and exclusion operate to channel women into feminized roles in the jazz world. We then discuss how women employ a number of strategies to work around the culture of exclusivity and capitalize on the norms and values of musical meritocracy. Despite institutional openings in professional jazz that emerged following the women’s movement, female jazz artists continue to face strong barriers toward full equality in the jazz world. Although female artists consistently demonstrate that they possess equal musical skills to male musicians according to the norms of meritocracy that guide professional jazz, women remain on the margins of the jazz art world.  相似文献   
53.
This article examines the tendencies of LGBT intergenerational theater projects. By engaging with ideas of queer time, temporal drag, and the pervasive heteronormative imagery of heritability and inheritance, this article explores the possibility that LGBT intergenerational projects may generate some of the problems they aim to challenge. Through the lens of queer time, the article describes the normativity generated in LGBT intergenerational theater projects as a form of restrictive interpellation. The article explores the temporal complexities at play in such theater productions as The Front Room, a specific LGBT intergenerational theater project performed in the United Kingdom in 2011. The article concludes by noting some ways in which intergenerational theater projects might seek to work through the embodiment of the historical quotidian as a mode of resistance to normativity’s recirculation.  相似文献   
54.
This paper presents a tractable set of integer programming models for the days-off scheduling of a mix of full- and part-time employees working α to β days/week (cycle) in a multiple-objective, multiple-location environment. Previous models were formulated to specifically schedule part-time employees working either two or three days per week. These models were intractable because they required complete employee schedule information. The new models are deemed implicit optimal since they are required to supply only essential information. While the number of variables in previous models is an exponential increasing function of β-α, the size of three of the new models is independent of α and β. The first three models developed here (as in [18]) deal with the trade-offs between idle time, the number of employees required to work at multiple “locations,” and the size of the total labor pool. The inherent flexibility of the implicit modeling approach is illustrated by the presentation of various modifications of the basic models. These modifications permit the use of preference weights on the number of employee work days/week (cycle) or the minimization of payroll costs where differential pay rates exist. These latter models may also be formulated such that idle time is ignored, constrained or minimized. The execution time for the implicit models (on a CDC CYBER 730 computer with commercially available software) averaged well under five seconds on 1200 trial problems for the type of application considered in [18]. A solution was obtained in less than 46 seconds of CPU time for a trial problem which would have required over 1.4 million integer variables with previous models. The availability of optimal solutions was invaluable in the development of two heuristics designed to deal with the trade-offs of [16]. In an experimental analysis a previous heuristic produced results which averaged from 74 to 508 percent above optimum across six experimental conditions. The comparable new heuristic produced results which averaged from 3 to 8 percent above optimum for the same experimental conditions. The paper concludes by developing a framework to integrate the results of this research with the tour scheduling problem and by identifying several other areas for related research.  相似文献   
55.
ABSTRACT

With reference to the 2014 Umbrella Movement and Hong Kong’s uncertain fate come 2047, I ask how one un-imagines the cultural future of inhabiting the locality. As people take prompts from the present predicament to cope with real possibilities about the future, they realize that a strong embodiment of local consciousness permeates the sociocultural space. I discuss how such engagement takes place through cinematic experience, and examine tactics of the spectator’s critique centring around the erosion of hope at the core of everyday, intellectual and affective imagination. I trace the ways in which postcolonial subjects engage with hope and with the shock of hopelessness in a lived social imaginary. Examining in detail three differently representative recent films, namely, The Midnight After (2014. Dir. Fruit Chan, The Midnight After Film and One Ninety Films), Overheard 3 (2014. Dir. Alex Mak and Felix Chong, Sil-Metropole, Bona Film and Pop Movies) and Ten Years (2015. Dir. K. L. Ng (‘Local Egg’, Boon-deh dan), J. Au (‘Dialect’, Fong-yin), K. Chow (‘Self-Immolator’, Jee-fun jeh), F. P. Wong (‘Season of the End’, Dong sim), and Z. Kwok (‘Extras’, Fau gua), Ten Years Studio), I depict the modes in popular imagination that invoke people’s engagement with the ‘local’, albeit in its affective state. Accordingly, in the context of ‘externalized’ social realities, I identify three interlocking modes of cultural engagement, which I characterize as figurative, performative and prefigurative, respectively. In their ‘future’ imaginary, I look for ordinary people’s ways to face the absurdity of the status quo and the performativity of local struggles with the self.  相似文献   
56.
This study evaluated the effectiveness of the 2nd and 3rd editions of the Children First parent education programs for parents experiencing divorce or separation. Participants were 678 parents experiencing separation or divorce in 2 Midwestern counties. Changes from pretest to posttest on participants’ knowledge, attitudes, and likelihood of adaptive coparenting were assessed. Both editions of the program had a significant positive effect on all 3 measures of adaptive coparenting. The effect sizes from pretest to posttest for the 2nd edition were small, whereas the effect sizes for the 3rd edition of the program were nearly twice as large. Superiority of the 3rd edition might be due to an increased focus on explicit training on adaptive coparenting behaviors.  相似文献   
57.
Green roofs are emerging engineered ecosystems that provide multiple benefits, but many are constructed with nutrient-rich substrate and have been found to leach out high levels of phosphorus (P) in runoff. It is unclear, however, how long green roofs act as sources of P or what mechanisms are responsible for these net losses. We measured P concentrations in runoff water over 4 years from a 1–5 year old extensive green roof in Cincinnati, OH, USA, produced a model to predict runoff P levels into the future, and validated predictions using runoff from 2 nearby extensive green roofs. P concentrations in runoff from the focal green roof were on par with heavily fertilized agroecosystems and displayed strong seasonal dynamics and a rapid decline over the 4-year study. Runoff measurements and changes in substrate P content over a 2-year period were used to estimate a mass balance for green roof P. P loss from the substrate was substantial (4.55 ± 2.3 g P/m2/yr), but only a small portion of the loss was attributable to leaching of P in runoff (0.19–0.65 g P/m2/yr). Missing P may be attributed to a combination of plant uptake and altered P form and binding strength, but further research is needed to precisely identify the mechanisms of P depletion. Our results also suggest that these and similar extensive green roofs are likely to act as environmentally significant sources of P for 10 or more years following roof installation, highlighting the need for reductions in initial substrate P content.  相似文献   
58.
59.
The study analyses how remittances to Nigeria affect the labour supply of recipients using Propensity Score Matching (PSM) and a Log‐Linear regression model, with data from the 2013 Nigerian General Household Survey. The PSM results show that for the entire sample, the difference between the average amount of labour supplied per week by those that receive remittances and the amount they would have supplied without remittances is insignificant. The marginal impact analysis also shows that, ceteris paribus, the average labour supply for all recipients is inelastic to remittances. The results from the sub‐group analysis, however, show that receiving remittances negatively affects the labour supply of the self‐employed in agriculture, teenagers and the elderly. These results led us to the recommendation that policies to increase the inflow of remittances should be encouraged but in tandem with programmes to educate farmers on the benefit of investing remittances received in their farming business.  相似文献   
60.
Bisexual youth are at elevated risk for depression when compared with lesbians and gay men. Research on bisexual stigma suggests that these youth are uniquely vulnerable to stress related to sexual identity disclosure. Depression associated with this stress may be buffered by social support from parents and friends. We examined the differential influence of social support from parents and friends (Child and Adolescent Social Support Scale) on the relation between disclosure stress (LGBTQ Coming Out Stress Scale) and depressive symptoms (Beck Depression Inventory) and differences by gender in a sample of cisgender bisexual youth (N = 383) using structural equation modeling. Parental support buffered the association between stressful disclosure to family and depressive symptoms, especially for bisexual men; bisexual women seemed not to benefit from such support when disclosure stress was high. This nuanced examination elucidates the ways family members and clinicians can best support bisexual youth sexual identity disclosure.  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