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   2114篇
  免费   82篇
管理学   288篇
民族学   17篇
人口学   208篇
丛书文集   20篇
理论方法论   175篇
综合类   132篇
社会学   1104篇
统计学   252篇
  2023年   22篇
  2022年   15篇
  2021年   21篇
  2020年   60篇
  2019年   67篇
  2018年   75篇
  2017年   107篇
  2016年   85篇
  2015年   53篇
  2014年   75篇
  2013年   275篇
  2012年   221篇
  2011年   91篇
  2010年   61篇
  2009年   62篇
  2008年   64篇
  2007年   62篇
  2006年   49篇
  2005年   59篇
  2004年   111篇
  2003年   111篇
  2002年   84篇
  2001年   56篇
  2000年   38篇
  1999年   20篇
  1998年   8篇
  1997年   8篇
  1996年   19篇
  1995年   15篇
  1994年   17篇
  1993年   9篇
  1992年   19篇
  1991年   13篇
  1990年   14篇
  1989年   14篇
  1988年   8篇
  1987年   13篇
  1986年   4篇
  1985年   5篇
  1984年   13篇
  1983年   7篇
  1982年   9篇
  1981年   11篇
  1980年   7篇
  1979年   5篇
  1978年   8篇
  1976年   3篇
  1974年   4篇
  1967年   2篇
  1966年   2篇
排序方式: 共有2196条查询结果,搜索用时 127 毫秒
991.
Rural social work occurs in unique practice environments with challenges and rare opportunities. Strong social ties, commonly found in rural communities and often missing in urban areas, can serve as sources of resilience for group members facing adverse life circumstances. Therapeutic formal and informal support groups, bolstered by this support and led by social workers in rural communities, can face numerous challenges due to locale, lack of transportation, and potential worker burnout. This article highlights ethical considerations rooted in a theme of rural group work while providing helpful hints based on the IASWG Standards for Social Work Practice with Groups.  相似文献   
992.

Seaports are introduction hotspots for invasive alien species (IAS). This is especially true for rodents, which have accompanied humans around the globe since the earliest days of ocean-going voyages. The rapid spread of IAS soon after arrival in a new environment is facilitated by further human-mediated transport or landscape features, like roads. By measuring genetic diversity and structure to investigate dispersal pathways, we gained insight into the transport, spread and establishment stages of a biological invasion, leveraging the most common rodent species (R. norvegicus) in this setting. We characterized the genetic structure of three Norway rat populations along a busy industrial road used by trucks to access the Port area in Paranaguá city (Brazil). A total of 71 rats were genotyped using 11 microsatellite markers. The results revealed a pattern of gene flow contrary to the expected stepping-stone model along the linear transect, with the two furthest apart populations being clustered together. We hypothesize that the observed outcome is explained by natural dispersal along the corridor being lower than human-mediated transport. The sampled area furthest from the port is a gas station frequented by trucks which are considered the most likely mode of transportation. In terms of management strategies, we suggest more emphasis should be put on cargo surveillance to lower the risk of Norway rat dispersal, not only for biosecurity, but also for sanitary reasons, as this port is a major grain trading point.

  相似文献   
993.

This cross-sectional questionnaire study presents a multi-level analysis on 2565 workers in 188 departments in 36 organizations in the Netherlands. A three-level model is used in which individual workers are nested within departments, which in turn are nested within organizations. Research questions concern (1) the amount and distribution of variance in job-related stress explained for the three levels in the study (individuals, departments, organizations), and (2) the specificity of relationships between psychosocial job demands and job-related stress in the three-level model. Well-being showed slightly more raw variance to be explained at supra-individual levels than strain. The full regression model explained about 35% of the total variance in both work-related strain and well-being. Psychosocial job conditions did not exceed the expected amount of 10 to 15% contribution to this explained variance. These results do not differ from comparable studies that do not use multi-level analysis. The variance distribution in the full model, however, showed unexplained variance to be located at the individual level for both strain and well-being, and at the departmental level only for well-being. This last finding shows a direction for possible improvement of work stress models. Specificity of relationships was also shown: psychological job demands were more strongly related to strain, whereas job content variables (i.e. job variety, job control) were more strongly related to well-being. Results also suggested that social support was more strongly associated with well-being than with strain. Well-being appeared to have a more widely varying range of predictors than strain.  相似文献   
994.
This article investigates the ways sexual violence experienced on college campuses in the United States is situated within the neoliberal university. Feminist theories are utilized to explore the relationship between sexual violence and neoliberal ideologies. The authors evaluate how neoliberal tenets imbedded in higher education have contributed to, and exacerbated, an environment where sexual victimization is common. An institutional level of analysis is utilized to examine the neoliberal influence on campus sexual violence and investigate the utility of the term everyday terrorism. The authors also address “crimes of omission”, institutional betrayal, and the significance of institutional bravery/courage. The authors provide recommendations for future research in the areas of everyday terrorism and campus violence.  相似文献   
995.
996.
For a fixed integer k≥0, a k-transmitter is an omnidirectional wireless transmitter with an infinite broadcast range that is able to penetrate up to k “walls”, represented as line segments in the plane. We develop lower and upper bounds for the number of k-transmitters that are necessary and sufficient to cover a given collection of line segments, polygonal chains and polygons.  相似文献   
997.
In recent years, the competition for shelf space has intensified, as more products now compete for a retail space that has remained roughly constant. In this paper, we analyze the dynamics of this competition in a multi‐supplier retail point. Assuming that sales are shelf space dependent, we consider a retailer that optimizes its shelf space allocation among different products based on their sales level and profit margins. In this context, product manufacturers set their wholesale prices so as to obtain larger shelf space allocations but at the same time keep margins as high as possible. We analyze the equilibrium situation in the supply chain, and find that generally the retailer's and the suppliers' incentives are misaligned, resulting in suboptimal retail prices and shelf space allocations. We however find that the inefficiencies induced by suboptimal shelf space allocation decisions are small relative to those induced by suboptimal pricing decisions.  相似文献   
998.
999.
Abstract Industrial restructuring has altered economic circumstances in the U.S., but the influences of these changes on family structure are not clear. This study examines whether industrial restructuring influences female headship and whether these effects differ in nonmetro and metro counties. Results based on data from the 1980 and 1990 U.S. Census of Population and Housing Summary Tape Files indicate several conclusions. First, female headed households increased more rapidly in nonmetro than metro counties from 1980 to 1990, although there was a great deal of variation across counties. Second, industrial restructuring contributed to change in female headship in nonmetro and metro counties, and changes in various industries had differing effects on female headship. Third, overall gains in women's employment in a county had no influence on formation of female headed households, gains in men's employment deterred female headship, and gains for women in specific industries tended to slow formation of these households. Fourth, controlling for changes in median income and part-time work did little to reduce the industry-specific influences on change in female headship. The results suggest that linkages between industrial restructuring and family structure do exist, although the models are less able to explain changes in female headship in nonmetro than in metro counties.  相似文献   
1000.
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