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目前岩芯信息表述尚没有统一的格式,严重阻碍了岩芯信息资源的利用,造成了资源浪费。为提高岩芯信息利用率,方便用户和其他软件共享岩芯信息,必须规范其组织、存储和交换数据格式,并提供相应的技术实现手段通过软件自动保存、解析岩芯信息。文章参照国内外相关资料及技术标准,创建了岩芯信息元数据标准,应用XML技术生成与元数据标准对应的XSD文件,并在应用程序中成功使用,当用户交互岩芯信息时,生成符合XSD格式要求的XML数据文件传送信息,不同用户可以正确解析岩芯信息。通过应用岩芯信息元数据标准,规范了数字化岩芯信息组织、存储和交换,采用XML技术由软件自动实现,大大提高了用户工作效率,方便了岩芯信息的共享,充分发挥了岩芯信息的价值。 相似文献
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简要介绍了MAPGIS和AutoCAD的基本特点,详细分析了两者数据特点和数据转换过程中要注意的问题,重点阐述了AutoCAD的DXF和DWG两种数据格式与MAPGIS的MPJ数据格式之间转换的实现过程与方法,最后总结了对AutoCAD数据和其他GIS软件间的数据转换的参考意义,从而达到数据资源的共享。 相似文献
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地球观测数据卫星分发系统(GEONETCast)借助通信卫星,把从地面站点、航空和航天平台获取的观测数据、产品传送给广大的用户。GEONETCast当前由CMACast,EUMETCast和GEONETCast Americas 3个区域系统组成,作为地球观测组织(GEO)提出的全球综合地球观测系统(GEOSS)的全球地球观测数据和信息卫星分发系统,旨在满足9个社会受益领域的用户需求。GEONETCast建立在现有区域系统之上,利用GEO的协调机制,共同确定GEONETCast系统的整体计划和要求。各区域系统在科研项目和业务建设的支持下,不断发展完善。未来要保障GEONET-Cast健康、良性和可持续的业务运行,还需要加强4个方面的工作:①区域系统之间的互相通信;②保持GEONETCast的开放性和动态性,发展更多的数据提供者提供地球观测数据;③发展更多的数据使用者;④数据政策。 相似文献
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Interdisciplinarity is a notoriously difficult concept to define, and even harder to achieve in practice. All too often social approaches reduce science to an object of study, or conversely physical science approaches are invoked as a source of ‘higher’ truth. Drawing upon our experiences as ESRC-NERC PhD students within geography, we outline a paratactical approach that links disciplines by adjacency rather than hierarchy. Toppling the disciplinary hierarchy creates the potential for non-reductionistic dialogue between science and social science, but it also raises a series of practical difficulties. These are considered around the themes of polyvocality, breadth over depth and (im)permanence. We suggest that while this kind of approach is increasingly encouraged by research funding bodies, it is less easily sustained within the everyday mechanics of the academic world. 相似文献
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On September 16th, 2005 the United States began restricting the entry of commodities shipped from abroad in wood packaging materials that do not conform to phytosanitation measures meant to prevent the spread of pests and pathogens. This action results from expensive lessons learned as global commerce facilitates pandemics like Dutch elm disease. Marxist political ecology is well suited to investigate such scenarios with its emphasis on the social production of nature within accumulation regimes. Some scholars contend, however, that Marxist accounts of the contradictions that result from nature’s commodification relegate nonhuman organisms to an apolitical role in environmental transformation while reinforcing the nature/society dichotomy. Often viewed as antithetical to Marxism, actor-network theory or ANT emphasizes the ability of actants (both human and nonhuman) to enroll other actants into heterogeneous assemblages or networks. Thus, it is claimed that nonhuman organisms can be attributed ontological status in processes of environmental change, much like their human counterparts. Despite this apparent theoretical discord, political ecologists are increasingly integrating aspects of both Marx and ANT into their analyses. But a more explicit articulation of the ontological basis and epistemic import of theoretical synthesis is warranted. This paper therefore prioritizes and links the ontological status of labor in both of these theories in order to expand the definition of urban environmental politics to include the role of nonhuman organisms. By demonstrating the laboring capacity of Dutch elm disease within the networks of urban political economy, the epistemology of environmental politics is thus expanded. 相似文献
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基于元数据的信息共享机制研究 总被引：4，自引：1，他引：4
元数据作为关于数据的数据,是目前信息共享的关键技术,也是当前研究的热点。在对比国际、国内元数据标准的基础上,采用元数据管理的三个层次:元数据子集、元数据实体和元数据元素,建立了“数字成都”元数据标准模板。它主要包括:标识信息、数据质量信息、空间参考信息、数据集的内容信息、分发信息、元数据参考信息。讨论了“数字成都”中基于元数据信息共享系统的结构、模块和特点,实现了分布式数据组织与管理、分布式数据共享、分布式数据快速索引机制以及跨平台数据访问。 相似文献
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Urban poverty in Western countries is usually defined in terms of social exclusion and integration. Welfare states can be
characterized according to three modes of integration, namely market exchange, redistribution and reciprocity. This paper
compares the mechanisms of the social integration of unemployed single mothers with those of unemployed men. In two deprived
neighbourhoods in Amsterdam, unemployed single mothers and unemployed native-born men were interviewed about their coping
strategies with respect to the labour market, social security institutions and social networks. Although the single mothers
have serious financial problems, they are better integrated into society at large than the unemployed men are. The single
mothers are strongly oriented towards the labour market, successful in getting support from the social security institutions,
have strong and supportive social networks, and are integrated into their neighbourhoods. In the conclusion we challenge the
idea of vulnerable single mothers and demonstrate the relatively successful integration of this category of women.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
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Natural Hazards - As the internet and social media continue to become increasingly used for sharing breaking news and important updates, it is with great motivation to study the behaviors of online... 相似文献
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地学数据产品的开发、发布与共享 总被引：6，自引：1，他引：5
数据是科学研究的基础,数据共享可以最大程度地发挥数据的使用价值,数据是实现数据共享最基本的要素。地学数据具有空间性、综合性、时间性、海量性、多源性等特点。属性数据、遥感数据、矢量数据是加工生产地学数据产品的重要数据源,属性数据空间化是加工、生产地学数据产品的重要技术手段。地学数据共享发布平台应当具备用户管理、数据目录查询、元数据管理、数据查询与浏览、数据下载等基本功能。推进科学数据共享,必须要有相应的政策措施保证,必须建立公正、合理的数据工作评价体系。 相似文献
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Sam Scott 《Geoforum》2007,38(4):655-676
Research into skilled migrant communities tends to emphasize the grounding of identities through transnationalism and mobility. Less research has been conducted into how skilled migrants actually ground their identities within the city through everyday social networks. The paper addresses this imbalance by examining the changing significance of British voluntary and community organisations (VCOs) in Paris, France. Combining qualitative and quantitative data, findings show local migrant networks to be important focal points for the British even though migrants’ lives may increasingly be transnational in orientation. The research also shows that in situ social networks are evolving. Specifically, traditional forms of elite expatriate communality are not as omnipotent as they once were, with the popularity of some high-profile British VCOs in Paris declining over recent decades. The paper argues that the link between social dynamism and communal morphology helps explain this shift: as British middle-class lifestyles have fragmented, and as the British migrant population in Paris has grown in scale and scope, so the range of VCOs and associated informal networks has grown. Whilst some skilled migrants still embed within traditional expatriate organisations, Britishness is increasingly grounded elsewhere; both within the city through alternative social networks, and located beyond the city through transnational ties. 相似文献
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Noah Quastel 《Geoforum》2011,42(4):451-461
While geographers have increasingly focused on how global commodity and production networks create new ‘geographies of responsibility’ there has been little empirical work considering how responsibility is worked into management systems and social activism in such networks. Drawing on literature from global production networks, geographies of responsibility and other literatures, this paper explores the dynamic and contested ways in which concepts of responsibility can play a role in network regulation. Both foreign direct investment and commodity networks (here referred to as ‘global production and investment networks’) are subject to complex negotiations and compromises involving corporate social responsibility and sustainability initiatives as well as shareholder activist, human rights, labor, and environmental activism. This is illustrated by reference to conflicts in Canada over Alcan, Inc.’s investments from 1993 to 2007 in the Utkal Alumina Project in Orissa, India. The project involved significant socio-environmental conflict. In Canada, Alcan’s investment was met by civil society campaigns that tested the company’s commitments to sustainability and corporate social responsibility. The case study suggests revising theories of geographies of responsibility. While foreign direct investment can create new relationships between distant others, these are fluid and contingent and not necessarily desirable. Rather than see networks as a source of responsibility we should work to ensure that the relationships that networks foster be structured to ensure our deeper values are respected. 相似文献
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矿山数据资料多,在勘查阶段设计后续钻孔工程时经常要查阅之前的钻孔资料。本文是在整理马来西亚吉兰丹州Ulusokor金矿区钻孔资料过程中用Access设计的一个简单查询界面,充分利用了Access用户友好的操作界面及其查询修改记录的强大功能,使得查询起来不再麻烦,既有利于资料整理,又有利于后续工程的布置。 相似文献
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《Geoforum》2017
One of the most prominent stylized facts about contemporary capitalism concerns its “financialization.” Like all economic stylized facts, however, facts about financialization are recognized by some commentators and not by others. This article offers one explanation why. It argues that the claims we can make about “the economy” depend upon how we envision that economy in the first place. The economy can be pictured in myriad ways – it is multiple, not singular – and different pictures of it enable the identification of different stylized facts about it. So it is with financialization. The article illustrates this by examining the history of two different traditions of picturing the economy. One – national accounting – increasingly has enabled financialization to be seen; the other – mainstream economics – generally has not. 相似文献
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Janaina Bezzerra Silva Mariana A. Giannotti Ana Paula C. Larocca José Alberto Quintanilha 《GeoJournal》2017,82(2):293-310
Spatial data have been used for the environmental monitoring of the consequences of accidents that involve the transportation of hazardous chemical products. This spatial data infrastructure (SDI), which was created for the sharing and use of spatial data, is limited by the absence of policies to support its establishment. The main objective of this study was to explore the use of social network analysis (SNA) as a tool to identify spatial data sharing between organizations involved in the management of accidents related to road transport of hazardous materials (RTHM). In addition, to discuss the existing policies and institutional agreements, and to initiate a conceptual SDI framework for RTHM sector. In this context, the institutions that are involved with RTHM were identified and information concerning their interest in the use and sharing of spatial data via a SDI was collected through interviews and consolidated. The interviews were at 39 institutions with representative employees. The interview data were tabulated and entered into the UCINET software (2000 version) to calculate metrics of centrality. From the SNA, the flow of data among the participating institutions was identified through the visual representation of the spatial data sharing and use networks. Subsequently, the existing institutional agreements for spatial data sharing were analyzed and discussed. The compiled results enabled the proposal of a conceptual SDI framework to support the management of disasters involving RTHM, based on the application of SNA theory, and the development of a methodology that supports the analysis of interactions among the various actors of an SDI. The purpose is to facilitate the formulation of policies for the sharing of spatial data for decision-making and preventive disaster management. The results indicate that the 39 institutions share spatial data, but this sharing is not always predetermined by formal agreements. Furthermore, there is a strong demand, by the institutions involved in the management of RTHM accidents, regarding legal mechanisms governing the sharing of data for the purpose of producing maps that help to describe actions of preparedness, prevention, management and immediate relief involving RTHM incidents. Finally, it was possible to propose a conceptual framework with data that is considered essential for creating an SDI for RTHM. 相似文献
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传统纸介质手工制图存在信息实时再现滞后、共享交换不便等弊端,即便目前普遍使用计算机制图,也只是对纸介质底图进行二次描绘,不是真正意义上的计算机数字化制图和专业应用.因此,由野外实测数据直接进机处理生成地质基础图件,已成为专业人员在实际工作中急需解决的实际问题.笔者尝试以中国地质大学开发的MAPGIS6.6为主,辅以常用图表处理软件等,将原始数据转换成MAPGIS明码格式文件,导入成图系统,经系统处理直接成图,基本解决了野外实测数据直接进机处理生成地质基础图件的问题,其成图精度高,基本图形、数据共享,成果信息实时再现,能够进行基本的空间分析,可实现信息全息化,成图质量可通过源数据检查等. 相似文献
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如何提高地质图空间数据库信息交换体系的可扩展性和互操作能力是这一领域中的研究热点.首先研究了ISO/OGC空间信息共享的规范和标准, 并建立了具有服务能力的空间信息集成模块, 在此基础上研究具有一致性的空间信息共享与服务体系, 形成独立于软件、适用于地质空间信息互操作的表达模式, 提供一个可用于异构和分布式体系下的数据描述机制, 使得应用管理地质空间数据成为可能.提出了以地理置标语言(geography markup language, GML) 模型为框架, 给出一种地质空间信息交换的机制.针对地学应用需求, 提出了专业应用数据的模式, 为地质空间信息交换提供了一种可行的方法. 相似文献