成矿预测研究现状及发展趋势   总被引：13，自引：0，他引：13  

薛顺荣  胡光道  丁俊 《云南地质》2001,20(4):411-416

随着地表露头矿，易识别矿越来越少，找矿难度越来越大。GIS高新技术普及应用，为成矿预测展示了新的前景。本文通过成矿预测发展历史的回顾，概述今后一段时期地勘行业成矿预测的主要思路：在新的成矿理论指导下，借助GIS技术，实现科学化，系统化，信息化，动态化和可视化多源信息综合预测找矿，为普查立项提供依据，并提出了具体工作步骤。  相似文献   

浏阳市旅游资源概况及其开发建议     

金明英 《湖南地质》2001,20(1):65-69

本文介绍了注浏阳市主要的旅游资源，并对境内旅游资源开发的优势条件进行了分析，在此基础上提出了开发的建议。  相似文献   

地面总辐射的异常减少对气候影响的数值试验     

陈杰  王安宇  吴池胜 《热带气象学报》1996,12(1):43-50

在与实际台风场近似一致的环境流场条件下，应用柱会标中的正压无辐散模式，讨论了台风中扰动的稳定性问题。研究表明，台风暖心结构的台风外围适当强度的冷空气活动有利限台风中扰动发展，且台风愈强，台风中扰动愈易发展。  相似文献   

区域持续发展的理论基础—陆地系统科学   总被引：29，自引：2，他引：29  

黄秉维  陈传康 《地理学报》1996,51(5):445-453

对区域持续发展的研究是持续发展深化的必由之路。区域持续发展研究的理论基础是对地球表层自然与人文各种要素的综合规律的揭示，即陆地系统科学。对持续发展广泛深入地研究既是地理科学责无旁贷的任务，也可促进其进一步发展。  相似文献   

沿黄河地带——我国国土开发布局轴线   总被引：2，自引：1，他引：2  

魏心镇  韩百中 《地理学报》1992,(1)

沿黄河地带是我国重要能源和金属资源富集区,发挥组合资源优势,强化以水资源为特色的复合轴线的作用,发展多元主导工业部门,构成大范围线状分布和小范围点状集中相结合的点轴系统,进一步完善我国沿海、沿江、沿黄三大经济开发轴线的互补格局。  相似文献   

AN EXPERIMENT STUDY OF FRONTAL CYCLONES OVER THE WESTERN ATLANTIC OCEAN^*          下载免费PDF全文

CUI Xiaopeng  WU Guoxiong  GAO Shouting 《Acta Meteorologica Sinica》2003,17(3):321-336

By using PSU/NCAR MM5 mesoscale model,a 60-h simulation is performed to reproduce a frontal cyclogenesis over the Western Atlantic Ocean during March 13-15 1992.The model reproduces well the genesis,track and intensity of the cyclone,its associated thermal structure as well as its surface circulation.The major cyclone (M) deepens 45 hPa in the 60-h simulation and 12 hPa in 6 hours from 36 h to 42 h (model time) and 27 hPa in 24 hours from 36 h to 60 h (model time).Cross-section and isentropic analysis tell us that the cyclogenesis is in very close relation with slantwise isentropic surfaces;the cyclone is always superposed on the core of neutral convective stability with nearly vertical isentropic surfaces,which coincides with what the theory of Slantwise Vorticity Development (SVD) says.Beginning with the theory of SVD,the development and propagation of the oceanic frontal cyclone are studied by using high-resolution model output in the context of slantwise isentropic surfaces.The results show that the frontal cyclone deepens rapidly by the interaction with the large-scale environment after occurring over the ocean with weak static stability;and the theory of SVD can well interpret the development and propagation closely related with slantwise isentropic surfaces,The downstream slantwise up-sliding movement along canting isentropic surfaces makes vorticities develop (USVD) under favorable condition (C_D<0,where CD is SVD index),and results in the moving and development of the cyclone.  相似文献   

大地热流对中国西部环境与生态演变的影响及其研究意义   总被引：4，自引：0，他引：4  

匡耀求  黄宁生  吴志峰  胡振宇  孙波  刘承帅 《地球科学进展》2003,18(1):22-029

中国西部地区生态环境的优劣与大地热流的高低有良好的对应关系。大地热流较高的西南地区生态环境优良,孕育了我国最好的生物多样性;而大地热流较低的西北地区环境恶劣,生态脆弱,荒漠化严重。大地热流的脉动影响区域大气系统下垫面的热力背景和气流运动,从而影响降水的分布和区域气候的干湿程度;大地热流的高低决定了一个地区地表生态系统能量供给的下限,是生态系统演变过程中一个重要的物种限制因子,制约了一些地区生态系统物种的多样性,进而影响到区域生态系统的稳健性。对大地热流影响生态系统发育和演变机理的研究将为人类科学干预地表生态系统的演化、恢复与重建退化生态系统提供科学依据与技术方案。提出了西部生态环境整治的一些新的思路。  相似文献   

云南地热资源及其开发前景   总被引：1，自引：0，他引：1  

殷瑛  王明珠  何绕生 《云南地质》2006,25(1):70-75

云南地热异常多且显著。滇西高温水热活动区是藏滇水热带的南延，滇东断陷盆地中低温水热活动区的形成得益于独特的地质结构，滇西、滇南花岗岩地热系统则主要吸收地层中K^40同位索放射热而成。开发前景极为广阔。  相似文献   

Conservation and community in the new South Africa: A case study of the Mahushe Shongwe Game Reserve   总被引：1，自引：0，他引：1  

Brian H. King 《Geoforum》2007,38(1):207-219

The idealization of natural landscapes and peoples during colonialism, coupled with the popularity of sustainable development in the postcolonial era, has contributed to the expansion of conservation planning throughout the African continent. Concerns surrounding the promotion of national and international conservation agendas at the expense of local livelihood needs have generated interest in community conservation projects that attempt to include local participation and knowledge in natural resource management. The early excitement associated with community conservation has waned in light of recent assessments that it has been unsuccessful in meeting its ecological and social goals. This parallels other research that suggests communities are understood in generic or homogenous ways that influence how these initiatives are understood. Using a case study of the Mahushe Shongwe Game Reserve, this paper evaluates how rural households access environmental and economic resources to produce livelihoods, and how these access patterns impact their views of the project. It is argued that there are significant livelihood variations within the community that shape the ways households engage with, and benefit from, conservation planning. Rather than strictly viewing Mahushe Shongwe as a constraint to environmental resource access or site for limited employment, community members identify a number of benefits from its existence including education and development opportunities. Additionally, transformations in governance systems in the region impact community views of the project since younger residents are less likely to engage with the Matsamo Tribal Authority, which participates in managing the reserve. The consequence is that conservation has various impacts and meanings within a specific community that remain tied to the livelihood and governance systems being renegotiated in the post-apartheid era.  相似文献   

The contested spaces of Cuban development: Post-socialism, post-colonialism and the geography of transition   总被引：1，自引：0，他引：1  

Simon Reid-Henry 《Geoforum》2007,38(3):445-455

The experience of the (post)socialist South has been marginal to the study of transition, despite the many similarities between processes of transition and development. This paper tries to better understand this overlap by exploring some empirical and conceptual connections between processes of development and processes of transition in Cuba. In doing so it makes two sets of arguments. The first set of arguments concerns the nature of ‘transition’ itself. I use the ‘contested spaces’ of the Cuban (socialist) biotech sector, and specifically its attempts to attract foreign (capitalist) investment as a case study. As a high profile industry, biotechnology functioned in Cuba as a political space within which questions of transition and development could be reconfigured by blurring the boundaries between them. In turn, this has enabled the Cuban State to legitimise responses to transition that would otherwise have appeared contradictory. The second set of arguments try to explain how this was possible. I argue that the slippage between nationalist and socialist visions of development allowed biotechnology (as a specifically developmentalist project) to be variously understood as, for example, a post-colonial socialist, or anti-colonial nationalist project in ways that suited the needs of transition at any one time. Such recombinations in many ways account for the non-linear and reversible nature of transition in Cuba. I speculate as to whether Bruno Latour’s work on the way capitalist societies understand themselves to be ‘modern’, helps explain how, in (post)socialist countries, processees of transition can be shaped through different historical constructions of modernisation and development.  相似文献