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   722篇
  免费   25篇
管理学   112篇
民族学   13篇
人口学   81篇
理论方法论   65篇
综合类   11篇
社会学   326篇
统计学   139篇
  2023年   20篇
  2022年   6篇
  2021年   5篇
  2020年   23篇
  2019年   30篇
  2018年   43篇
  2017年   69篇
  2016年   46篇
  2015年   30篇
  2014年   38篇
  2013年   139篇
  2012年   33篇
  2011年   21篇
  2010年   31篇
  2009年   21篇
  2008年   28篇
  2007年   14篇
  2006年   21篇
  2005年   14篇
  2004年   6篇
  2003年   6篇
  2002年   6篇
  2001年   9篇
  2000年   16篇
  1999年   8篇
  1998年   7篇
  1997年   7篇
  1996年   3篇
  1995年   2篇
  1994年   2篇
  1993年   4篇
  1992年   2篇
  1991年   2篇
  1990年   4篇
  1989年   7篇
  1988年   3篇
  1985年   3篇
  1984年   2篇
  1983年   1篇
  1982年   5篇
  1981年   2篇
  1980年   3篇
  1978年   1篇
  1973年   1篇
  1971年   1篇
  1967年   1篇
  1964年   1篇
排序方式: 共有747条查询结果,搜索用时 0 毫秒
211.
212.
This randomized, controlled trial evaluated the effects of exercise on health-related quality of life (HRQoL) and fear of falling (FoF) among 149 home-dwelling older women. The 12-mo exercise program was intended to reduce the risk of falls and fractures. HRQoL was assessed by the RAND-36 Survey, and FoF, with a visual analog scale, at baseline, 12 mo, and 24 mo. On all RAND-36 scales, the scores indicated better health and well-being. The exercise had hardly any effect on HRQoL; only the general health score improved slightly compared with controls at 12 mo (p = .019), but this gain was lost at 24 mo. FoF decreased in both groups during the intervention with no between-groups difference at 12 or 24 mo. In conclusion, despite beneficial physiological changes, the exercise intervention showed rather limited effects on HRQoL and FoF among relatively high-functioning older women. This modest result may be partly because of insufficient responsiveness of the assessment instruments used.  相似文献   
213.
Green roofs are potentially valuable habitats for plants and animals in urban areas. Wild bees are important pollinators for crops and wild plants and may be enhanced by anthropogenic structures, but little is known about wild bees on green roofs in cities. This study investigates the effects of green roof qualities (floral resources, substrate character and depth, roof height and age) on wild bee diversity, abundance and traits (nesting type, sociality, pollen specialisation, body size) on green roofs in Vienna. Nine green roofs were sampled monthly between March and September 2014 by a semi quantitative approach. Wild bees were collected in pre-defined sub-areas for the same amount of time and floral resources were recorded. Over all green roofs, 992 individuals belonging to 90 wild bee species were observed. Wild bee diversity and abundance was strongly positively affected by increasing forage availability and fine substrates. Wild bees on roofs were characteristically solitary, polylectic and 8.3–11.2 mm. Regarding nesting type, the percentage of above-ground nesting bees was higher compared to the common species composition in Middle Europe. Ground-nesting wild bees were mainly eusocial, smaller (6.4–9.6 mm) and positively affected by roofs with fine substrates. During June, when forage availability by wildflowers on roofs was “low” (5–15% flower coverage), flowering Sedum species were an important forage resource. We conclude that wild bee diversity and abundance on green roofs are enhanced by floral resources. Furthermore, the installations of areas with finer and deeper substrates benefit ground nesting and eusocial wild bees.  相似文献   
214.
Exploring how text understanding evolves through interaction in a drama-text-based student theatre production, the present study takes its theoretical point of departure in sociocultural and dialogical approaches to meaning making and creativity. Video data from a Swedish upper secondary school allowed us to follow transitions of text understanding in the artistic shaping of characters from drama text to stage text. We analyze a special kind of communicative side project: short, recurrent student-initiated role-plays, embedded in teacher-led activities. The joint text understanding that was established in these side projects proved productive in the emergent shaping of the stage text.  相似文献   
215.
In this article, we examine the school-going and educational choices of youth living in sparsely populated regions of Finland that are located far away from educational institutions. We ask the following question: What kind of concrete impact does the geographic narrowing of educational possibilities have on the lives of youth in remote villages? Thirty-five interviewees (15 boys and 20 girls) between the ages of 14 and 18 were selected for this analysis. According to the results, gender and families’ symbolic resources are still strong predictors of youth’s educational choices; however, in the Finnish hinterland, families’ economic resources become a significant reflection of young people’s realistic educational possibilities. The youth in our analysis can be seen as ‘others’ of the contemporary educational and regional policies – that is, members of a learning society who are living in an educational vacuum and are forced to create their educational paths by making numerous compromises and forgetting many of their personal dreams. Their situation is not unique, as Finland’s wide-ranging neoliberal centralisation policies tend to create educational vacuums in certain regions on the edges of society.  相似文献   
216.
This paper focuses on tensions between activation principles and medicalisation in the Swedish sickness insurance and its implications for frontline caseworkers in Social Security Agencies and Public Employment Services. The right to sickness cash benefits has become stricter and more conditioned upon the person’s work ability and employability. The paper describes recent policy changes towards activation and stricter entitlement criteria for sickness benefits policy and explores the consequences of such new activation policies in terms of changed work modes for caseworkers dealing with long-term sick people’s return-to-work process. It is concluded that on the one hand frontline work contains a significant portion of discretion and professional assessment of work abilities, and on the other hand rule-bound administrative work. Furthermore, frontline workers need to apply organisational professionalism as inter-organisational cooperation is required in order to support long-term sick people to return-to-work. Medicalisation of ill-health, manifested in the right to sickness benefits has not been substantially circumscribed by new activation policies in the sickness insurance.  相似文献   
217.
An analysis of longitudinal data on Finnish older adults shows that the probability of admission to long-term institutional care is inversely associated with household income: women in the lowest income quintile are 35 per cent more likely, and men in the lowest quintile 59 per cent more likely to be admitted than those in the highest quintile, independently of age, first language, and area characteristics. Controlling for other socio-demographic characteristics and medical conditions reduces these differences by 59 and 78 per cent, respectively. Being a renter and living in poorly equipped housing increases the probability of admission to institutional care, while the possession of a car and living in a detached house decreases it, independently of other factors. These results imply that the future need for institutional care will depend not only on the increasing numbers of older people but also on socio-economic factors and housing conditions.  相似文献   
218.
National policies emphasize older people's right to autonomy, yet nursing home residents often have restricted opportunities to make decisions about everyday matters. We use qualitative interview data to analyze staff members' explanations of actions that conflict with both social norms and national policies. Two types of problematic actions are discussed: restrictions of elderly residents' influence in decision making and neglect of residents' complaints. While staff members describe residents' influence as desirable, they simultaneously formulate accounts that justify their inability to live up to this ideal. Further, we demonstrate how certain complaints are “made trivial” when they are described and treated in specific ways by the staff. We argue that the accounts offered by staff members draw on an implicit folk logic, a logic in which residents are allowed to exercise influence only as long as it does not conflict with the efficient running of the institution as a whole.  相似文献   
219.
Burma faced independence in 1948 as a deeply divided country. The British had ruled the area, which now was declared the ‘Union of Burma’ under two entirely different administrative systems. ‘Burma Proper’ was basically populated by the ethnic Burmans, Arakanese, Mons and Delta Karens, whereas the ‘Frontier Areas’ were populated by the Shan people, Salween Karens, Kachins, Karennis, Chins and various subgroups of the aforementioned. The same year, as independence was granted, the Union of Burma plunged into a civil war, which still continues. This article discusses the ethnic categories created by the colonial authorities and looks into how these ethnic categories have been – and continue to be – imagined, invented, manipulated and politicised. The article looks into how the Burmese authorities dealt with the ethnic diversity in the first constitution of 1947 by dividing the country into ethnically based ‘states’ and ‘divisions’ and how the international community of today continues supporting these colonial categories.  相似文献   
220.
Aboveground forest carbon sequestration is known to be a function of allometric relationships, stand history, and edaphic conditions. We investigate how the heterogeneous edaphic conditions of a naturally assembled urban brownfield influence the allometric relationships of the dominant species Betula populifolia Marsh. We measured diameter at breast height (DBH), height, mass and age on four sites that exhibited considerable edaphic differences. Site conditions did not appear to impact total tree mass to diameter relationships. However, mean DBH at the various sites ranged from 6.7 to 9.8 cm and the mean height from 637.4 to 911.8 cm. In addition, above ground woody biomass ranged from 40017 to 71935 kg ha?1. Apparently resource allocation between growth and maintenance within the heterogeneous edaphic conditions of the urban context clearly results in considerably different growth rates and stocking densities. These results help to establish accurate metrics for the development of inventory-based forest carbon allocation models within the difficult environs of the urban context.  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