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   277篇
  免费   5篇
管理学   53篇
民族学   3篇
人口学   18篇
丛书文集   1篇
理论方法论   17篇
综合类   1篇
社会学   116篇
统计学   73篇
  2020年   1篇
  2019年   7篇
  2018年   11篇
  2017年   9篇
  2016年   12篇
  2015年   19篇
  2014年   7篇
  2013年   47篇
  2012年   15篇
  2011年   13篇
  2010年   12篇
  2009年   14篇
  2008年   13篇
  2007年   6篇
  2006年   7篇
  2005年   7篇
  2004年   9篇
  2003年   9篇
  2002年   6篇
  2001年   2篇
  2000年   10篇
  1999年   3篇
  1998年   4篇
  1997年   4篇
  1996年   6篇
  1995年   2篇
  1994年   6篇
  1993年   1篇
  1991年   1篇
  1990年   1篇
  1989年   1篇
  1988年   3篇
  1987年   1篇
  1981年   2篇
  1980年   1篇
  1979年   1篇
  1978年   1篇
  1976年   1篇
  1975年   2篇
  1974年   1篇
  1973年   1篇
  1971年   1篇
  1967年   1篇
  1966年   1篇
排序方式: 共有282条查询结果,搜索用时 15 毫秒
11.
This installment of "Serials Spoken Here" covers events that transpired between late September and late October 2008. Reported herein are two Webinars, one on ONIX for Serials, the other on SUSHI, and two conferences: the eighty-fourth annual Meeting of the Potomac Technical Processing Librarians and the New England Library Association's Annual Conference.  相似文献   
12.
Urbanization causes species loss around the world, but its effects on phylogenetic diversity are poorly known in tropical forests. Using a patch-landscape approach in an urbanizing region of the Brazilian Atlantic Forest, we tested whether the increase in landscape urbanization reduces plant species density, phylogenetic richness and divergence, and increases the relatedness among co-occurring individuals and species. We assessed plant responses to urbanization in adult (diameter at breast height?>?10 cm) and sapling communities (2.5–10 cm diameter) separately, as saplings are proxies of the future flora. We sampled 2860 woody plants belonging to 155 species in nine circular landscapes with urbanization level varying from 0% to 45%, and estimated the relatedness among the species that have increased and decreased in relative abundance in more urbanized landscapes (winner and losers, respectively). As expected, species density and phylogenetic richness decreased with the increase in urbanization. These responses were consistent for adult and sapling communities, suggesting a persistent loss of species and lineages in more urbanized landscapes. Contrary to our expectations, phylogenetic divergence and structure did not respond to urbanization, indicating that the more urbanized landscapes still retain much evolutionary history. However, because the relatedness among winners was greater than among losers, it is likely that the phylogenetic divergence gradually reduces and the relatedness increases, resulting in impoverished forests with uncertain ability to provide ecosystem services such as carbon storage and pest control. This environmental cost should be taken into account to align urban sprawl with biodiversity conservation.  相似文献   
13.
Crime or disease surveillance commonly rely in space-time clustering methods to identify emerging patterns. The goal is to detect spatial-temporal clusters as soon as possible after its occurrence and to control the rate of false alarms. With this in mind, a spatio-temporal multiple cluster detection method was developed as an extension of a previous proposal based on a spatial version of the Shiryaev–Roberts statistic. Besides the capability of multiple cluster detection, the method have less input parameter than the previous proposal making its use more intuitive to practitioners. To evaluate the new methodology a simulation study is performed in several scenarios and enlighten many advantages of the proposed method. Finally, we present a case study to a crime data-set in Belo Horizonte, Brazil.  相似文献   
14.
ABSTRACT

This paper analyses the interrelationship between patterns of im/mobility on the one hand and the reconstitution of social collective identities and the related emergence or settlement of conflicts on the other. The main arguments are (1) that the im/mobility of a social or cultural group has major impact on how identity narratives, a sense of belonging and relationships to ‘others’ are shaped, and vice versa, and (2) that these dynamics are closely interlinked with mechanisms of inclusion and exclusion between groups and power structures that involve a broad variety of actors. Mainly looking at patterns of internal mobility such as ‘traditional’ or strategic mobilities and mobilities enforced by crisis, conflict or governmental programmes and regimes, the contribution provides the conceptual background for a special issue that aims to go beyond currently predominant issues of transnational migration. Established or emerging dynamics of (non-)integration and belonging, caused by im/mobility, are analysed on a cultural and political level, which involves questions of representation, indigeneity/autochthony, political rights and access to land and other resources. Conflict situations in contexts of mobility involve changes in the social understanding and renegotiation, reconstruction or reproduction of group identities and narratives with reference to certain socio-political and historical patterns. The legitimation of rights and access to various forms of citizenship and mobility need to be understood against the backdrop of emerging or established mechanisms of inclusion and exclusion between groups, which trigger or settle conflicts and make social identities to be constantly renegotiated.  相似文献   
15.
In 1999, two articles in The Physician Executive -- "Part I: Global Theory and the Nature of Risk (July-August)." and "Part II: Towards a Choice-Based Model of Managed Care (October-November)" -- outlined the flaws of orthodox managed care theory and highlighted the unique advantages of moving to a genuinely market-based model, which included the concept of direct contracting for integrated episodes of care. This follow-up focuses on comparing an episode contracting system to a traditional capitated program and outlines the features that make this approach much more attractive to physicians, payers, and most importantly patients.  相似文献   
16.
Following Gurman (1981), this study reports on authors and topics of interest in prominent marriage and family therapy journals from 1980 through 1995. Fifteen of the 25 institutions that produced the greatest number of authors prior to 1978 continued to be among the top 25 between 1980 and 1995, and the 25 leading institutions produced 29.5% of articles from 1980 to 1995. Most authors held positions in university settings and taught in programs with a marriage and family therapy focus. Clinical issues were the most common focus of articles (61%), and one-third of all articles were research reports.  相似文献   
17.
Reports on four major serials conferences, the 2007 North Carolina Serials Conference, the 2007 meeting of the Ohio Valley Group of Technical Services Librarians, the Canadian Library Association’s 2007 Pre-Conference, and the 2007 North American Serials Interest Group Conference.  相似文献   
18.
Global developments in dual citizenship legislation highlight changes to conceptualizations of citizenship by increasing the focus on individual rights. Questions of inclusion and exclusion have been illuminated by the move toward wider acceptance of dual citizenship. To understand global patterns and developments in dual citizenship laws this article analyzes the legislation pertaining to dual citizenship in 115 countries. The results show how dual citizenship is becoming increasingly accepted – a development that has predominantly taken place within the last 20 years. A strong regional pattern is identified, supporting the argument that dual citizenship is spreading in a fashion similar to how the idea of citizenship expanded from Europe in the 19th and 20th centuries. Potential internal and external reasons for this development are discussed and individual countries’ experiences analyzed.  相似文献   
19.
In assessing the influence of regional Environmental Protection Agency EPA offices on the state management of hazardous waste programs, we focused on the extent to which federal administrative decisions affect levels of enforcement activity by state environmental agencies and whether these effects vary over time. Our results indicated that state enforcement actions were affected by state program capacity variables such as primacy and the strength of existing hazardous waste policies as well as one federal-level factor—the distribution of grant monies. The impact of federal oversight decisions was minimal.  相似文献   
20.
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