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   352篇
  免费   15篇
  2024年   1篇
  2023年   7篇
  2022年   5篇
  2021年   5篇
  2020年   12篇
  2019年   23篇
  2018年   24篇
  2017年   30篇
  2016年   19篇
  2015年   13篇
  2014年   16篇
  2013年   52篇
  2012年   16篇
  2011年   15篇
  2010年   13篇
  2009年   12篇
  2008年   20篇
  2007年   7篇
  2006年   7篇
  2005年   9篇
  2004年   3篇
  2003年   4篇
  2002年   4篇
  2001年   6篇
  2000年   5篇
  1999年   3篇
  1998年   1篇
  1997年   3篇
  1996年   2篇
  1995年   1篇
  1994年   3篇
  1993年   2篇
  1991年   4篇
  1990年   2篇
  1989年   3篇
  1988年   1篇
  1987年   1篇
  1986年   1篇
  1984年   1篇
  1983年   1篇
  1982年   1篇
  1980年   1篇
  1979年   3篇
  1977年   3篇
  1968年   1篇
  1966年   1篇
排序方式: 共有367条查询结果,搜索用时 15 毫秒
1.
2.
This article focuses on the particular moment of the 1945 United Nations charter meeting as a catalyst for a shift in Mary McLeod Bethune's feminist thought. The meeting, where Bethune served as the only African American female delegate, signalled a change in Bethune's thinking about equality for black women, so she used the founding of the United Nations as a platform to promote black women's alliances with other women of colour. Her idea was to reframe black women as citizens of the world, thus putting them in a numerical and ideological majority rather than keeping them in a minority position. Bethune has often been viewed as a reformer of race and gender issues in the early twentieth century, but a focus on her activism has hidden the intellectual contributions that she made to a form of black feminism that emerged out of her work with other clubwomen and through the United Nations in the 1920s through the 1950s. Specifically, this article argues that Bethune's intellectual work created a framework for African American women's feminism that emphasised anti-colonialism and their global alliance with other women of colour throughout the world.  相似文献   
3.
Academic and political debates about international sanctions tend to focus on the instrumental purposes of these measures—their ability to hurt a target state sufficiently to cause it to change its behaviour. By contrast, the symbolic purposes of sanctions are commonly assumed not to be as important. Such assumptions are appropriate for states which have the capabilities necessary to achieve these ends—great powers or regional powers targetting very weak neighbours, for example. But are these assumptions useful in explaining the sanctions policies of non‐great powers, particularly those which impose sanctions against great powers? This paper explores the case of Australian and Canadian sanctions against the USSR after the invasion of Afghanistan and demonstrates the fallacy of such assumptions, and argues that symbolic purposes were much more important than the instrumental utilities normally associated with sanctions theory.  相似文献   
4.
Daganzo (1977, 1979), Daganzo and Sheffi (1977), Sheffi (1985), and Sheffi and Daganzo (1980) have used one assumption about traveler behavior in developing estimation techniques for the stochastic route-choice problem and another assumption in predicting flows on networks by using the same model. In estimation, they calculate the congested travel costs of the network links from observed flows on the network, and the network is loaded based on these costs. In prediction, they follow their stochastic user-equilibrium assumption by which travelers evaluate costs using the mean of the observed flows (or equilibrium flows). The travel-cost coefficient obtained from the loading method systematically overestimates the true travel-cost coefficient from which the observed flow data (which must be used in loading) is generated. The estimates of the same coefficient, obtained in this paper, by constraining the estimation results to conform to the equilibrium conditions are unbiased, and only marginally less efficient (have larger standard deviations). The average percentage error and inefficiency of the link flow predictions based on the loading method increases as the level of congestion on the network rises. In contrast, the average percentage error of link flow predictions based on the equilibrium estimation method declines and their efficiency remains very high as the level of congestion on the network rises.  相似文献   
5.
6.
Environmental stewardship—a concept that describes the relationships between humans and the environment—is gaining increased attention as an approach that can address planetary sustainability issues. In-depth empirical investigations of local environmental stewardship are needed to understand how social-ecological context influences stewardship, as well as the arrangement of conceptual elements in applied settings. This study addresses these needs by conducting an in-depth exploration of environmental stewardship in the Niagara Region of Canada. A single embedded case study design is employed, with environmental stewardship initiatives constituting the individual units of analysis with the case. Analysis of the spatial arrangement of a total of 89 initiatives indicated that initiatives tended to cluster closer to the Niagara River and in more populous municipalities. The significance of collaboration, tensions between the environment and economic development, and concerns about political impacts emerged as themes across contextual factors. The configuration of stewardship elements reveals interesting discrepancies between initiatives and previous stewardship research focused on larger scales, individuals, and organizations. Further analysis is encouraged to illuminate environmental stewardship in other settings as well as advance relational understanding of conceptual elements.  相似文献   
7.
Julia Sizek 《对极》2023,55(6):1898-1918
A proposed project will take water from an aquifer in the California desert to the coast. Lacking final approvals more than 30 years after it started, the project remains a plan despite sizeable opposition. What is its secret? In this paper, I examine the imaginaries of the underground aquifer underneath the lands of Cadiz Inc, the project proponent. While local theories insist the company is at the centre of a Chinatown conspiracy, I argue that the company stays alive through regulatory alchemy, a term that reveals the magic at the heart of scientific and regulatory approval processes. I examine narratives of the aquifer in environmental compliance and financial reporting in order to reveal how regulatory processes become the conditions of profit-making, building on debates in critical legal geography and political ecology.  相似文献   
8.
The join-count statistic is used to measure the tendency of polygons of a given map type to attract or repel polygons of the same or different map types. Yet in certain maps—for example, natural resources maps—it is often impossible for a polygon of a given type to touch another polygon of the same type. (This is the no-same-color or “No-Same-Type-Touching” (NSTT) constraint referred to in the title.) This violates an underlying assumption of the join-count statistic and may render its use to study certain spatial phenomena inappropriate—even for measuring spatial autocorrelation among polygons that are not the same type. This was explored using Monte Carlo simulation. For polygons of different types, it appears that results of the join-count statistic can be interpreted without any special consideration for the NSTT constraint provided there are a minimum of five to eight colors in the spatial system. For polygons of the same type, results can simply be ignored since it is known that no two polygons of the same type will touch.  相似文献   
9.
Linguistic, art historical, hermeneutic, gender and intercultural analyses clarify body and gender concepts in Sumerian and Akkadian mythology, literature and visual arts. The body was a fundamental point of reference in ancient Mesopotamia, metaphor for the total self, royal ideology, cities, humanity and deities. Humanity was created without gender; sex, gender and social status were subsequently inscribed on the body. Gender taxonomy tolerated ambiguity beyond the ‘normative’ masculine/feminine. Body and mind were an inseparable unity and denoted by the same Sumerian word. Mind/body and male/female dichotomy were unknown.  相似文献   
10.
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