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   146篇
  免费   5篇
  国内免费   5篇
测绘学   26篇
大气科学   5篇
地球物理   15篇
地质学   24篇
海洋学   28篇
综合类   9篇
自然地理   49篇
  2022年   1篇
  2021年   1篇
  2020年   2篇
  2019年   3篇
  2018年   1篇
  2017年   10篇
  2016年   5篇
  2015年   7篇
  2014年   12篇
  2013年   7篇
  2012年   5篇
  2011年   14篇
  2010年   5篇
  2009年   11篇
  2008年   8篇
  2007年   6篇
  2006年   11篇
  2005年   3篇
  2004年   4篇
  2003年   6篇
  2002年   7篇
  2001年   7篇
  2000年   3篇
  1999年   3篇
  1998年   2篇
  1997年   4篇
  1995年   1篇
  1994年   2篇
  1991年   3篇
  1989年   1篇
  1982年   1篇
排序方式: 共有156条查询结果,搜索用时 15 毫秒
101.
在国家统筹经济建设和国防建设的大背景条件下,本文简要论述了我国军地测绘地理信息资源共享合作的基本情况,研究分析了制约军地测绘地理信息资源共享的原因,提出了分步推进军地测绘地理信息资源统筹发展的思路建议。  相似文献   
102.
The roles of governance and technological innovation have been widely recognized as important parts of sustainability transitions. However, less attention has been paid to understanding the mechanisms of the emergence and spread of innovative ideas for stewardship of social–ecological systems. This study considers how theories of innovation and agency are able to provide explanatory power regarding the spread and impact of such ideas. This includes how innovations may contribute to resolving the mismatches between the scale of ecological processes and the scale of governance of ecosystems. The emergence and spread of Marine Spatial Planning (MSP) is used as an illustrative case study. The study shows that individuals embedded in informal networks have played a key role in driving the emergence of MSP across scales and in constantly re-framing the tool in order to overcome obstacles to adoption and implementation. In a number of cases, MSP has been decoupled from the ecosystem despite being framed as a tool for ecosystem-based management. Finally, this study is important to understand the process of emergence of new integrated tools for ecosystem stewardship at the global level.  相似文献   
103.
通过分析北美湿地林地规划及设计的理念,特别推出了美国联邦政府对湿地林地规划及设计具体的法规及列举美国主要湿地林道路基类型。通过美国国际重要湿地和地方湿地公园湿地林道的几个具体实例,阐明北美遵循最优管理实践原则及联邦政府湿地林道规划设计法规,促进湿地生态系统可持续发展。  相似文献   
104.
This paper considers the existing law and policy framework for ocean energy development in Ireland. As a nation, Ireland proposes to have 75 MW of ocean energy connected by 2012 and a further 500 MW by 2020. This has been supported by various policy documents and Government initiatives in recent years. Despite the obvious Government support for offshore renewable energy, the existing legal framework presents a veritable barrier to development progress. This paper provides a succinct overview of the existing applicable legal regime focusing on licensing and planning aspects. Specifically it examines the realities of the Foreshore Acts, Electricity Regulation Act, Planning and Development Acts and associated Environmental Impact Assessment Regulations and their role in wave energy development. This sets the context for a review of the problems associated with the existing legal regime, including delay and uncertainty, before presenting possible measures which may help address them. The latter discussion is framed within the context of developing and forthcoming European and national initiatives such as the Integrated Maritime Policy, Maritime Spatial Planning, Integrated Coastal Zone Management and Strategic Environmental Assessment.  相似文献   
105.
在探讨湿地类型自然保护区功能区划分的意义及存在问题的基础上,将保护计划实施工具——CAP软件(Excel Workbook和Miradi)运用到湿地类型自然保护区功能区划分中,并对CAP软件的原理、功能及实用性进行探讨分析。分析研究表明,CAP软件对于湿地类型自然保护区功能区划分、动态分区具有可行性、适用性及科学性。  相似文献   
106.
项目 ,就是以一套独特的 ,相互联系的任务为前提 ,有效利用资源 ,为实现特定目标所做出的努力。项目在工作范围、进度计划、成本方面都明确界定目标 ,项目经理的职责是保证实现目标 ,确保项目工作在预算内高质量按时完成 ,并使用户满意  相似文献   
107.
本文结合山东省莱州市区域发展规划研究,阐明系统动力学在区域发展规划中应用范围、过程及意义,并针对系统动力学方法与模型在区域发展规划中的特点,对区域发展规划中数学模型的多功能化发展进行概括说明。  相似文献   
108.
109.
Demand for both primary residences and second homes in high-amenity areas has led to escalating property values and widespread development pressure in coastal New Zealand. We focus on a major development proposal at Ocean Beach, a greenfield coastal site in the Hawke’s Bay region, and seek to explain the opposition it has provoked. In so doing, we address three questions: first, what landscape values are articulated within the planning process; second, what is the anticipated impact of 1000 new dwellings on those values; and third, how does place attachment figure in the ensuing debates. We address these questions though a thematic analysis of data derived from official reports and proposals, planning submissions, and key informant interviews. We find Ocean Beach to be a place that offers a quintessential coastal experience, often linked to youthful memories. Additionally, the site is valued for its accessibility and wilderness qualities - perceptions heightened by awareness that areas of undeveloped coastline relatively close to population centres are increasingly scarce. We contend that such sites are doubly valuable: in a formal sense, as natural landscapes whose processes and forms receive regulatory protection; and in an informal sense, as sites that generate human meaning, including emotions such as nostalgia, freedom and belonging.  相似文献   
110.
昆明市东川城区后山泥石流灾害修复措施   总被引:3,自引:0,他引:3  
莫美仙  张世涛 《云南地质》2006,25(2):242-248
东川城区后山构造发育、地震频繁、山体失稳、地形高差悬殊和雨量集中且暴雨强度大等,是导致本区泥石流频繁而猛烈的根本原因。人类不合理的经济活动则对本区泥石流的发生发展起着重要的加剧、恶化作用。对东川城区后山泥石流的治理必须采用软件和硬件两大措施相结合的综合治理办法,并对治理过的泥石流沟加强管理力度。  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