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   1073篇
  免费   44篇
  国内免费   15篇
测绘学   72篇
大气科学   32篇
地球物理   34篇
地质学   107篇
海洋学   27篇
综合类   65篇
自然地理   795篇
  2024年   1篇
  2023年   7篇
  2022年   70篇
  2021年   57篇
  2020年   82篇
  2019年   73篇
  2018年   63篇
  2017年   72篇
  2016年   63篇
  2015年   38篇
  2014年   56篇
  2013年   108篇
  2012年   47篇
  2011年   31篇
  2010年   24篇
  2009年   35篇
  2008年   29篇
  2007年   35篇
  2006年   37篇
  2005年   26篇
  2004年   22篇
  2003年   21篇
  2002年   18篇
  2001年   14篇
  2000年   21篇
  1999年   13篇
  1998年   7篇
  1997年   10篇
  1996年   10篇
  1995年   5篇
  1994年   4篇
  1993年   6篇
  1992年   2篇
  1991年   1篇
  1990年   1篇
  1988年   2篇
  1987年   5篇
  1986年   4篇
  1985年   4篇
  1984年   4篇
  1983年   2篇
  1982年   2篇
排序方式: 共有1132条查询结果,搜索用时 15 毫秒
921.
针对中低收入家庭的住房保障这一重大社会问题,研究保障性住房设计,已成为建筑师所面临的现实任务。方案"民居·庭院·住宅",以弘扬民居传统文化为设计理念,提出创造以人为本、融入自然、高科技含量、低成本高质量的特色时代住宅,进而保障中低收入家庭平等的居住权利。  相似文献   
922.
ABSTRACT

The aim of the article is to discuss whether a definition of economic geography as contextual analysis still is viable and relevant. The author argues that the definition remains the key to the production of high quality and social relevant research. He concludes that contextual analysis represents the competitive advantage of economic geography among other social sciences and the best position to demonstrate its relevance to the broader society.  相似文献   
923.
Abstract

Multi-stakeholder sustainability certification schemes have become a favorite instrument for applying good governance, though studies indicate their inefficiency at the producer level. In this study, we used a mixed-method approach to first, map the institutional context of independent oil-palm smallholders in rural Sumatra while, second, reflecting upon the impact of the Smallholder Standard proposed by the Roundtable on Sustainable Palm Oil on smallholder management practices. We hold that non-recognition of micro-scale perspectives within governance processes may partially explain noncompliance with certification principles among smallholders. The Smallholder Standard appears unable to mitigate challenges important for smallholders, who in turn cannot properly comply with it, due to problems including weather instability and high management costs. We suggest that certification schemes need to work on some overlooked but essential preconditions of good governance, namely gaining micro-level visibility and acceptance.  相似文献   
924.
Abstract

It is widely recognized that stakeholder engagement processes produce advantages, but few studies acknowledge that they also can produce disadvantages. There is a global need to better assess stakeholder engagement processes by defining success and developing new methods to analyze stakeholder participation data. Our method of digitizing and coding stakeholder communications (1) produces a wide range of analyses, (2) tells the story of governance over time, (3) is comparable with other datasets, and (4) can be used wherever public documents exist. We demonstrate the utility of these integrated methods by examining statewide differences in public participation and success rates in Alaska’s Board of Fisheries’ (Board) proposal process. We determine that significantly different participation and success rates across the state indicate the existence of disadvantages and the need for further investigation into the equity, efficiency, and effectiveness of the Board process.  相似文献   
925.
中国城市“新移民”社会网络与空间分异   总被引:19,自引:2,他引:17  
李志刚  刘晔 《地理学报》2011,66(6):785-795
伴随日益加速推进的中国城市化进程,新生代农民工问题备受关注。通过对广州8个城中村的问卷调查与实证研究,本文对中国城市新移民的社会网络进行研究,分析移民聚居区与其社会网络的关系。研究表明,新移民的社会网络表现为成分多样化、关系现代化和空间分散化等3大特征;新移民积极利用聚居区外的社会关系寻求发展机会;移民聚居区的分异度正逐步降低,中国城市内部二元分异的空间格局正逐渐被打破。但是,移民与城市居民的社会隔阂并未完全扭转,新移民并没有融入到本地社区,基于地缘、血缘的"差序格局"仍是他们界定网络成员身份的重要准则。此外,迁移历史和社会经济地位是影响移民社会空间重构的主导因素。未来中国城市新移民的社会空间融合将表现为一个渐进而持续的历史过程。  相似文献   
926.
Much of the debate on global climate change has focused on direct costs of mitigation. Recently this debate has included the issue of ancillary benefits. The present analysis incorporates a linkage between air pollution and ancillary health benefits into a general equilibrium model applied to Sweden. Direct disutility and indirect health effects are modelled using concentration-response and contingent valuation data. Health benefits are compared in three scenarios for attaining the Swedish carbon dioxide target with alternative projected and harmful emission levels. Results show that the costs of climate policy could be overstated when not accounting for ancillary health benefits.  相似文献   
927.
The influence of business schools on business practitioners is considerable. An important proportion of corporate leaders hold a degree in business administration or an MBA, if not both. In the context of climate change, this influence matters: greenhouse gas (GHG) emissions from a selection of global 500 companies approximate that of the USA and the EU15 combined. Not only do corporations have a significant climate footprint, but the impact of climate change on the business landscape is already noticeable. Yet, meeting the managerial challenges that climate change brings requires knowledge only moderately addressed in business education and scholarship today. Climate change tends to be discussed in electives - hence reaching only a fraction of students - and tends to be treated alongside a myriad of other corporate social responsibility issues. Moreover, from 1992 to 2008, only seven articles with titles containing climate change or global warming were published in the top-30 peer-reviewed management journals (this paper, see also Goodall, 2008). In this paper, by mapping the diffusion of climate change within press media and academic peer-reviewed publications, I argue that understanding the existing lag in business scholarship engagement requires a fundamental understanding of processes that either hinder or lead to the diffusion of new ideas. To do so, I present a simple yet novel approach for the quantification of climate change or global warming (CCorGW) coverage relative to population size. My results on the diffusion of the climate change idea over time show: (a) an overall increase in proportional coverage in all databases (b) tipping points around the late 1980s and circa 2005 and (c) delays in adoption between press categories. I explicate the occurrence of these tipping points as well as the existence of delays by theoretically unifying my analyses with results from previous studies under the umbrella of the diffusion of innovation paradigm. I suggest that the following key factors have contributed in slowing the diffusion within business scholarship: (a) corporate values, beliefs and operational modes (b) social structures and incentives prevailing within academia and finally (b) academia's valued research communication channels. I conclude by elaborating key recommendations to facilitate the diffusion of this idea to business scholars and other influential audiences.  相似文献   
928.
常梅 《山东地质》2011,(5):60-62
现当代博物馆是新形势下博物馆的发展趋势,它改变了传统博物馆被动保守的运作模式,实现由"以藏品为中心"向"以公众为中心"的理念转变,既能使公众领略自然科学的魅力和获取美的享受与感悟,还能突出地域特色和时代理念,实现贴近实际、贴近生活、贴近群众的时代使命。通过对烟台自然博物馆社会服务职能的分析定位,对如何在新时期更好开展博物馆社会服务职能工作有一定交流借鉴价值。  相似文献   
929.
The intraurban mobility patterns of a sample of homeless individuals in the Skid Row area of Los Angeles is examined. Findings indicate that the voluntary mobility of homeless persons in the sample is related less to individual characteristics than to the availability and location of resources, particularly social supports.  相似文献   
930.
Over the past three decades the Western Australian wheatbelt has undergone dramatic economic, environmental and social changes precipitated, primarily, by the process of rural restructuring. Farm amalgamation, environmental degradation, labour market adjustments and severe population decline have been consistently noted trends throughout much of the wheatbelt. The ongoing and integrated nature of these problems has led to increasing calls for a more holistic approach to sustainable rural development. This paper argues that while considerable efforts are being made to find solutions to the economic and environmental problems faced in the wheatbelt, these endeavours do not address many important problems faced by rural communities. It therefore advocates the inclusion of a social dimension in any attempt to achieve an overall goal of rural sustainability.  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