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   398篇
  免费   2篇
  2024年   1篇
  2023年   4篇
  2022年   6篇
  2021年   4篇
  2020年   10篇
  2019年   11篇
  2018年   8篇
  2017年   12篇
  2016年   8篇
  2015年   9篇
  2014年   11篇
  2013年   24篇
  2012年   18篇
  2011年   24篇
  2010年   23篇
  2009年   30篇
  2008年   33篇
  2007年   30篇
  2006年   26篇
  2005年   11篇
  2004年   15篇
  2003年   9篇
  2002年   15篇
  2001年   14篇
  2000年   25篇
  1999年   5篇
  1998年   1篇
  1997年   7篇
  1996年   3篇
  1995年   2篇
  1991年   1篇
排序方式: 共有400条查询结果,搜索用时 15 毫秒
1.
Border regions are not often associated with innovation and economic prosperity. And even when they are prosperous, cross-border interaction is still mostly limited. The opening up of borders in Europe has presented new opportunities for firms located in these border regions to co-operate for innovation and knowledge to flow across borders. Despite the reduction of the importance of borders, firms seeking to access cross-border knowledge resources need still to ‘cross’ the border and address the various effects it brings. This paper therefore asks the question of how the presence of a border affects the processes by which firms attempt to build up productive co-operations for innovation. We use a heuristic of collaborative innovation across borders as building up through four sequential cooperation stages, and each of these different stages is susceptible to different kinds of border effects. Using a case study of firms co-operating across the Dutch-Flemish border, we empirically explore these border crossing processes in order to shed further light on how border processes play out.  相似文献   
2.
Building on existing research concerned with social distance in multi-ethnic states, this study of college students in Gansu Province and Ningxia Hui Autonomous Region provides a picture of social attitudes, intra-group attachment, and inter-group social distance along ethnic and religious lines in Northwest China. The study measures inter-ethnic group fissures in Chinese society as measured in social distance between three ethnic groups: Han, Hui, and Tibetan. Comparative survey methods are used to examine inter- and intra-group relations by mapping dimensions of social distance among 382 university students. Our results indicate only very subtle differences that suggest a closer majority–minority relationship than the previous literature indicates, especially between the Hui and Han. The findings show some clustering and segregating patterns along ethnic lines, specifically when accounting for degrees of trust and tolerance and levels of ethnic and religious attachment. The Hui and Han in Ningxia exhibit closer inter-group relations in comparison to wider measurements of social distance between the Tibetan and Han in Gansu. Where the survey data revealed clustering among ethnic groups, the analysis shows that religious, geographical, and economic differences fail to account for the attitudinal differences between ethnic groups.  相似文献   
3.
义和团运动时期的北方战事,给包括租界在内的上海及江南民众日常经济生活带来巨大恐慌。身处纷乱的惊惧不安和经济萧条的切实威胁,社会各界普遍企望北方战事早日平息,不致蔓延到南方,这种社会心理氛围,是"东南互保"得以产生和推行的重要原因。  相似文献   
4.
European Union spatial policies have become a key institutional context in which to study policy transfer processes in European border areas. These policies are, however, only the most recent part of these transformation processes which raises a need for more historically sensitive approaches. An historical perspective is important, since border regions are historical processes with particular path-dependent development trajectories and power structures. This paper aims to contribute to the discussion concerning the transformation of European border regions by looking at the policy transfer of regional development discourses in the Finnish Torne Valley. The study material consists of strategic development documents produced by the Finnish border municipalities and the municipal-based co-operation organizations from the 1930s to 2013. The examination, based on critical discourse analysis, shows that the transformation process is driven by national trends and the dominant planning discourse. Nevertheless, the particular border setting and local discourse on ‘united Torne Valley’ have also intertwined with political and economic processes during different time periods.  相似文献   
5.
The paper analyses with a case study the use of a widely applied normative concept of polycentricity as spatial imaginary. The case study of Helsinki City Plan and the conflict over its city-boulevard scheme draws on qualitative content analysis of planning documents and expert interviews. It demonstrates the instrumental role of multiple interpretations of polycentricity in tension-ridden metropolitan and city-regional spatial planning. The conflict reveals how the conceptual ambiguity of polycentricity and the institutional vagueness of city-regional planning have together enabled advancing contradictory political aims under their guise. In conclusion, the paper emphasizes the persuasive performativity and fluidity of polycentricity as a spatial imaginary in multi-scalar planning settings.  相似文献   
6.
Abstract

The author scrutinizes the history of Muli (木里) as a semiautonomous political entity in the 17th century southern Sino-Tibetan borderland. By tracing Muli’s improvization in the face of multiple powerful regimes such as the Naxi kingdom, the Geluk Tibetans, the Khoshut Mongols, and the Chinese dynasties, the author explores how an indigenous notion of power took shape in the wake of geopolitical turbulence. Before 1580, Muli was a colony of the Naxi kingdom and dominated by the Kagyu school of Tibetan Buddhism. After 1640, it became a stronghold of the Tibetan Buddhist Geluk school and was deeply involved in the power struggles between the Geluk and Kakyu schools as well as the Tibetans and Mongols. Despite of acknowledging multiple sovereigns, Muli rulers utilized various tactics to hold on to power and prioritize local interest. The nuanced, yet creative, strategies Muli people adopted showcases the significant role border regimes played and their agency in shaping the power dynamics in pre-modern Eastern Asian borderlands.  相似文献   
7.
The original ceramics typology developed for Younge/Western Basin Tradition Springwells phase (ca. AD 1160–1420) assemblages included three variants known as Macomb Linear, Macomb Interrupted Linear, and Springwells Net Impressed ceramics. This discussion considers how subregional variation in Springwells decorative styles reflects participation in a larger regional social network.  相似文献   
8.
Epipaleolithic/early Neolithic settlements at Qinghai Lake,western China   总被引:1,自引:0,他引:1  
Transitions from terminal Pleistocene Upper Paleolithic foraging to Holocene Neolithic farming and pastoralist economic orientations in the northern Tibetan Plateau are examined from the perspective of Epipaleolithic sites located near Qinghai Lake, Qinghai Province, western China. Jiangxigou 2 is an artifact-rich, multicomponent midden site with the main period of occupation dating ca. 9000–5000 cal yr BP, containing abundant flaked stone artifacts including a substantial proportion of microlithic tools, abundant faunal remains including gazelle, deer, and sheep, and a small number of ceramics, including the oldest known on the Tibetan Plateau. Heimahe 3, on the other hand, is a brief hunter's camp dating ca. 8450 cal yr BP, with evident affinities to late Upper Paleolithic camps in the same region that date several thousand years older. The two distinctively different sites are probably nodes within a single Epipaleolithic foraging system that developed on the margins of the high Tibetan Plateau during the early Holocene, and that served as a basis for colonization of the high-altitude Plateau at that time. Jiangxigou 2 appears to be connected to early Neolithic agricultural settlements along the upper Yellow River (Huang He) drainage during the middle Holocene, and may provide insights into forager–agriculturalist interactions that lead to the development of pastoralist systems in the region.  相似文献   
9.
10.
对明清江淮西部地区的旱涝史料进行梳理,对逐年州县旱涝灾害资料等级进行量化处理,并通过计算旱涝平均等级值和10年滑动平均值,重建1450—1911年该区域的干湿变化时间序列。结果发现,该区1450—1911年间共出现6个干湿阶段: 1450—1490年,以轻度干旱为主;1491—1545年,旱涝灾害频发,干湿波动较为明显;1546—1625年,旱涝灾害少发,干湿比较平稳;1626—1710年,以中度干旱为主,极端干旱事件发生频率显著增加;1711—1860年,气候湿润;1861—1911年,干湿波动偏湿润。不同的干湿阶段对江淮西部的湖泊也造成了一定的影响,干旱时期,湖盆积水减少,湖周萎缩;湿润时期,降雨增加,湖泊的蓄水量增加。  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