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   514篇
  免费   32篇
  2022年   4篇
  2021年   7篇
  2020年   7篇
  2019年   18篇
  2018年   21篇
  2017年   33篇
  2016年   27篇
  2015年   29篇
  2014年   19篇
  2013年   89篇
  2012年   18篇
  2011年   21篇
  2010年   12篇
  2009年   17篇
  2008年   14篇
  2007年   7篇
  2006年   5篇
  2005年   6篇
  2004年   8篇
  2003年   8篇
  2002年   5篇
  2001年   8篇
  2000年   11篇
  1999年   6篇
  1998年   3篇
  1997年   6篇
  1996年   6篇
  1995年   9篇
  1993年   8篇
  1992年   5篇
  1991年   4篇
  1990年   4篇
  1986年   4篇
  1980年   3篇
  1977年   9篇
  1976年   5篇
  1975年   4篇
  1972年   5篇
  1971年   4篇
  1970年   3篇
  1969年   5篇
  1968年   3篇
  1967年   4篇
  1966年   4篇
  1965年   3篇
  1964年   3篇
  1961年   3篇
  1960年   3篇
  1959年   4篇
  1950年   3篇
排序方式: 共有546条查询结果,搜索用时 15 毫秒
111.
In input-output analysis there are two alternate possibilities between Leontief's mechanism (fixed technical coefficients) and Ghosh's mechanism (fixed allocation coefficients). Testing the long-term consistency of these mechanisms entails comparing input-output matrices over time. This paper challenges the value of proportional filters (separate comparisons of column and row coefficients) and introduces the biproportional filter that allows simultaneous comparison of column and rows. An application is proposed using French input-output tables for 1980 and 1993. The stability of column coefficients cannot be taken for granted and, generally, for any sector, both row and column coefficients are found to change simultaneously.  相似文献   
112.
This re‐evaluation of existing data on board games from the Near Eastern Bronze Age demonstrates their function as social lubricants in cross‐cultural interaction. Board games are situated theoretically as liminoid practices, which lie outside the bounds of normative social behaviour and allow for interaction across social boundaries. Utilizing double‐sided game boards, with an indigenous game on one side and a newly introduced game on the other, the games of senet, mehen and twenty squares provide evidence for social interactions. Cypriots had adopted Egyptian mehen and senet by the third millennium BC, and indigenized the games. This lies in contrast to the game of twenty squares, which had a particular role among elites in the Late Bronze Age interaction sphere. This anthropological discussion of evidence relating to gaming seeks to inspire further research on the role of board games in society.  相似文献   
113.
114.
115.
ABSTRACT

Many communities rely on tourism spending, so it is important to understand any potential changes to tourist flows resulting from changing climate and weather patterns. However, tourists are not a homogenous group, as they have different motivations, values, and goals. Therefore, the purpose of this investigation is to better understand potentially varying perceptions and behavior of different tourist types, specifically in regards to their weather sensitivity, climate change concern, and behavioral intention for climate change mitigation. Tourists were randomly surveyed at 20 locations throughout the state of Maine in the United States (n = 704). Segmentation analysis on the activities tourists participated in yielded three segments of Maine tourists: non-nature-based tourists (50.6%), nature-based generalists (16.2%), and nature-based specialists (33.2%). Differences across segments were explored for perceptions of weather impacts, climate change concern, and mitigation intent. Additionally, weather sensitivity was analyzed based on type of overnight accommodations to better understand if this also had a role in differences. Non-nature-based tourists thought that weather variables were less influential during their travels in Maine than the other segments, while nature-based generalists perceived weather to have the highest influence. Additionally, nature-based specialists had the highest level of climate change belief, while nature-based generalists had the highest willingness to engage in climate change mitigation behavior. Results are useful to understand how segments of tourism demand may be altered with a changing climate, such as increased temperatures, precipitation, and storms, and what groups may be the most beneficial to target for marketing or educational efforts to reduce the impact of climate change.  相似文献   
116.
The present study is part of the European Community's Europe 2000 programme, which aims to provide prospective reflection on the future of Community territories. Its contents are in no way binding upon the European Community.  相似文献   
117.
118.
119.
Historische Orientierung: Über die Arbeit des Gescichtsbewusstseins, sich in der Zeit zurechtzufinden . By Jörn Rüsen.  相似文献   
120.
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