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   1548篇
  免费   48篇
  国内免费   36篇
测绘学   28篇
大气科学   367篇
地球物理   97篇
地质学   242篇
海洋学   206篇
天文学   4篇
综合类   77篇
自然地理   611篇
  2023年   5篇
  2022年   32篇
  2021年   37篇
  2020年   40篇
  2019年   64篇
  2018年   66篇
  2017年   91篇
  2016年   85篇
  2015年   75篇
  2014年   70篇
  2013年   254篇
  2012年   56篇
  2011年   82篇
  2010年   56篇
  2009年   70篇
  2008年   68篇
  2007年   78篇
  2006年   53篇
  2005年   47篇
  2004年   36篇
  2003年   36篇
  2002年   33篇
  2001年   23篇
  2000年   35篇
  1999年   30篇
  1998年   26篇
  1997年   13篇
  1996年   7篇
  1995年   9篇
  1994年   4篇
  1993年   5篇
  1992年   5篇
  1991年   8篇
  1989年   1篇
  1988年   8篇
  1987年   5篇
  1986年   3篇
  1985年   5篇
  1984年   4篇
  1983年   4篇
  1982年   1篇
  1980年   1篇
  1978年   1篇
排序方式: 共有1632条查询结果,搜索用时 15 毫秒
991.
992.
Jamie Peck  Nik Theodore 《Geoforum》2010,41(2):195-1109
The paper presents a genealogy of the Bloomberg administration’s Opportunity NYC program, launched in 2007 as part of New York City’s explicitly experimental anti-poverty strategy. Opportunity NYC was modeled on “conditional cash transfer” programs, currently operating in more than thirty countries across the Global South, drawing direct inspiration from Mexico’s widely touted Oportunidades program. This striking case of South-North policy emulation calls attention to some distinctive features of what is characterized here as a transnationalizing “fast-policy” regime, based on technocratic forms of program evaluation and development, dense expert networks, and orchestrated communities of practice, within which a range of policy intermediaries—particularly those connected with multilateral agencies—are assuming significant new roles. What appears to be a pragmatic form of policy learning in fact operates in the context of narrow ideological parameters, within which there is a concerted technocratic “push” toward favored solutions.  相似文献   
993.
陈林 《贵州地质》2010,27(2):118-120,123,147
第二轮矿产资源总体规划的编制,以科学发展观为统领,坚持"在保护中开发,在开发中保护"的方针,充分体现战略性、政策性、科学性和可操作性,实现保护资源与保障发展的双向效应。  相似文献   
994.
BOOK REVIEWS     
Abstract

The Regional Geography of Canada, 3rd ed.Robert M. Bone Oxford University Press 70 Wynford Drive, Don Mills, ON, M3C 1J9, Canada 2005, xxi + 572 pp Hard Cover ($45.00 US) ISBN 0-19-541933-2  相似文献   
995.
We survey the status of former public psychiatric hospitals, asking what has happened to the land and buildings. Drawing on Anderson's notion of traces, we argue for the transcendent role of stigma in closure processes and in subsequent reuse. We examine the extent to which evidence of mental health care remains at former hospital sites and developed a fivefold classification of end uses – retained health care; trans‐institutionalisation (to new institutional uses); residential; commercial; and dereliction. We conclude that while stigma is pervasive in shaping traces of the psychiatric hospital, its effects are filtered by locality‐specific factors including commercial potential.  相似文献   
996.
Innovation systems and clusters are perhaps the most widely used concepts found in recent economic geography literature focusing on innovative industrial production and locational agglomeration. Both concepts have been universally embraced since the early 1990s onwards. However, recent literature has expressed criticism of their use as tools for policymaking. The authors studied innovation and cluster rhetoric in a geographical context by using empirical evidence obtained from the policy documents of the Finnish regional councils. They used a theoretical conception of spatial scaling as a geographical framework. Spatial scales proved to be a black box for regional strategies in Finland. Regional strategic programmes use a similar language that ignores the spatial variations of their locations. Clusters and regional innovation systems should be considered as parts of vertical and horizontal interlinkages within the economy and not as individual islands of organizational proximities in isolated contexts. The authors argued that an imprecise understanding of the innovation systems and cluster approaches, both conceptually and practically, has led to some ambiguity, resulting in the use of the terms clusters and innovation systems as buzzwords. This misuse hampers the ability of administrations to execute regional development in their respective areas.  相似文献   
997.
Fiscal impact assessments exist to provide decision makers with the tools to make informed decisions regarding local government finances. Every type of change in a community will have a unique impact on the local economy. This impact cannot be evaluated without careful attention to the particular geographic setting of the study. Unfortunately, geography is currently underutilized in the practice of fiscal impact analysis. This paper argues that the increased application of geographic tools is a key to improving the accuracy of fiscal impact reports.  相似文献   
998.
京津冀都市圈合作思路与政府作用重点研究   总被引:20,自引:1,他引:19  
京津冀都市圈合作是中国统筹区域发展的战略问题之一。该文依据区域经济合作发展的一般规律与发达国家经验,从理论与全局的角度分析京津冀都市圈合作的必要性,并探讨政府促进京津冀都市圈合作的思路、规划与政策重点。笔者认为,完善京津冀都市圈合作机制,关键在于完善区域管理制度基础;京津冀都市圈企业主导型合作应该注意克服地方利益矛盾,并用合理的政策促进地区间企业合作。  相似文献   
999.
The recent assessment by the Intergovernmental Panel on Climate Change (IPCC) has emphasized that understanding the institutional context in which policies are made and implemented is critical to define sustainable development paths from a climate change perspective. Nevertheless, while the importance of social, political and cultural factors is getting more recognition in some parts of the world, little is known about the human dimensions or the contexts in which they operate in the affluent oil economies of the Arabian Peninsula. Policies that implicitly subsidize or support a wasteful and environmentally destructive use of resources are still pervasive, while noteworthy environmental improvements still face formidable political and institutional constraints to the adaptation of the necessary far reaching and multisectoral approach. The principal aim of this paper is to identify some of the major shortcomings within the special context of the Arab Gulf states' socio-cultural environment in support of appropriate development pathways. Conclusions highlight that past and current policy recommendations for mitigating environmental threats are likely to be ineffective. This is because they are based on the unverified assumption that Western-derived standards of conduct, specifically the normative concept of ”good governance” and ”democracy”, will be adopted in non-Western politico-cultural contexts.  相似文献   
1000.
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