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   944篇
  免费   32篇
  2023年   3篇
  2021年   3篇
  2020年   14篇
  2019年   16篇
  2018年   34篇
  2017年   32篇
  2016年   29篇
  2015年   31篇
  2014年   33篇
  2013年   265篇
  2012年   20篇
  2011年   28篇
  2010年   18篇
  2009年   31篇
  2008年   37篇
  2007年   25篇
  2006年   14篇
  2005年   21篇
  2004年   11篇
  2003年   13篇
  2002年   18篇
  2001年   20篇
  2000年   14篇
  1999年   12篇
  1998年   10篇
  1997年   12篇
  1996年   7篇
  1995年   8篇
  1994年   7篇
  1993年   11篇
  1992年   5篇
  1991年   10篇
  1990年   8篇
  1989年   10篇
  1988年   5篇
  1987年   8篇
  1986年   7篇
  1985年   10篇
  1984年   17篇
  1983年   10篇
  1982年   9篇
  1981年   9篇
  1980年   7篇
  1979年   15篇
  1978年   8篇
  1977年   7篇
  1976年   4篇
  1975年   9篇
  1974年   4篇
  1972年   4篇
排序方式: 共有976条查询结果,搜索用时 15 毫秒
91.
ABSTRACT The spatial intensities of both industries and population are highly uneven across space. Moreover, these intensities differ not only across industries, but also change through time. Nevertheless, we show using Japanese data for metropolitan areas in two time periods that the location intensities of both industries and population are linked by surprisingly simple and persistent patterns. In particular, we identify a strong negative log‐linear relation between the number and the average (population) size of metro areas in which a given industry is found. This relation, which we designate as the Number‐Average Size (NAS) Rule, is also shown to be intimately connected to both the Rank‐Size Rule and Christaller's (1966) Hierarchy Principle applied to metropolitan areas. In particular, we show mathematically that in the presence of the Hierarchy Principle (which holds quite well in Japan) this NAS Rule is essentially equivalent to the Rank Size Rule.  相似文献   
92.
This paper presents the results of in situ monitoring of waterlogged burial contexts in southwest Scotland. The sites investigated are Iron Age crannogs (lake dwellings) which have a proven waterlogged archaeological component, and which are being assessed as part of a national program of study by the Scottish Wetland Archaeology Programme (SWAP) team. A monthly monitoring program commenced in July of 2004. To date, monitoring of water levels, pH, and redox potential, has been undertaken for a period of 17 months in order to encompass any seasonal variability at the sites studied. The results have proven robust in that an ‘ideal’ site for in situ preservation has been identified from the five sites investigated, and the monitoring has highlighted external variables and seasonal impacts that have the potential to influence the long-term in situ preservation at the remaining sites studied. In general, these results have expanded upon our knowledge of the potential for the preservation of existing archaeological remains within such contexts. This study represents the first stage of monitoring aimed at developing a holistic understanding of in situ conditions at the crannog sites studied in southwest Scotland.  相似文献   
93.
Regional Development Agencies have been given the fundamental aim of improving their regions' economic performance and competitiveness. Supporting innovation is a cornerstone of this policy. This paper explores the limitations of region-based strategies arguing that this neglects the importance of policy intervention at the local level, using case studies of Oxfordshire and Cambridgeshire.  相似文献   
94.
95.
96.
97.
98.
99.
The conventional view of Giotto is that he was a great narrative and dramatic painter. In addition his art was ideologically aligned with the Guelph party in Florence and its allies: the papacy, the Franciscan establishment and the house of Anjou. This can be traced in his paintings, especially the fresco cycles. Internal evidence suggests that in addition to his acknowledged cycle for the Scrovegni family in Padua he was the principal artistic deviser of many of the disputed frescoes in the nave of the Upper Church at Assisi, including the paintings of the life of St. Francis.There is also evidence that many of his frescoes in various parts of Italy (including cycles no longer extant) were undertaken at the behest of the Florentine commune as part of its diplomacy. He was in fact the first artist to become part of the bourgeois ruling class, and his spatial and plastic realism was in complete accord with their interests.The Scrovegni cycle is more complex than has been realised, involving a profound allegory which fulfils the needs of the patron, expresses Giotto's world view, and at the same time serves the diplomatic interest of Florence.  相似文献   
100.
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