地籍信息系统中基于UML的关系数据库设计

讨论了在地籍信息系统(Cadastral Information System简称CIS)中如何应用统一建模语言(Un ified Model-ing Language简称UML)设计关系数据库(Relational Database简称RDB),并结合CIS中的属性数据,给出一个简单实例,为CIS的数据库设计提供一种参考。     

‘I’m not in it for the money’: Constructing and mediating ethical reconnections in UK social banking

Over the last decade a range of social banks and Community Development Finance Initiatives (CDFIs) have developed a social investment sector in the UK. Some of these organisations emphasise their belief in partnership, association, reconnecting and re-humanising the relationship between investors with borrowers in order to reap social returns. ‘Ethical’ investors are encouraged to take sub-market returns on their investments in order for surpluses to be distributed to the organisations’ beneficiaries. Some key theoretical and political questions include: how are investors enrolled in these initiatives? What discourses of ethics are constructed and how do investors relate to them? How do these discourses relate to debates in geography revolving around ‘caring at a distance’? Drawing on work on the Charity Bank and the Industrial Common Ownership Fund (ICOF), this paper analyses how these discourses are constructed and mediates the relationship between investors and borrowers. It explores stakeholders both investors’ and borrowers’ perceptions of these activities as well as the way investors construct their own reasons for investing.     

Relational networks of knowledge production in transnational law firms

For geographers, debates surrounding the knowledge economy have reinvigorated interest in the geographies of learning and knowledge production. Particularly topical are discussions of the possibility of spatially stretched (global) learning, something especially relevant to professional service firms where the production and management of knowledge across transnational organizational networks is essential. Taking this as its starting point, the paper explores the way knowledge is produced and circulated in transnational legal professional service firms. Drawing on the ideas of relational economic geography to analyse original empirical material, it highlights the way relational networks are socially constructed to allow learning to be stretched across space. The paper then goes on to identify the ‘politics’ of inclusion in these networks and the exclusivity of membership. It also highlights the geographies of power that influence the nature and effect of the knowledge produced and circulated. It does this by examining the role of relational knowledge networks in the ‘Americanization’ of legal practice in Europe and the impacts of such changes on national institutional and regulatory contexts. It is, therefore, argued that transnational corporate networks need to be viewed as heterogeneous and ‘embedded spaces of social practice’. It is shown that studying the actors and their interactions across relational networks is vital to fully understand how global relational forms are constructed and to understand their structuring effects on the global economy.     

The irrigation technozone: State power,expertise, and agrarian development in the U.S. West and British Punjab, 1880–1920

Many of the world’s deserts were transformed by irrigation expertise at the beginning of the 20th century. An irrigation “technological zone” emerged to facilitate the circulation of engineering expertise and the territorial expansion of the U.S. and British imperial states. Hydraulic engineers considered themselves globally connected technicians providing practical solutions to the political problems of poverty and famine. Although premised on the neutrality and universal applicability of scientific principles, the practices and environmental expertise of irrigation engineers were firmly rooted in regional state/society formations, which sought to increase agricultural production and induce settlement with irrigation. This paper analyzes the globalization of irrigation expertise through a relational comparison of the irrigation narratives of the British Punjab and the Western U.S., 1880–1920. The analysis demonstrates that the irrigation technological zone was significantly formed by place-based dynamics that, in turn, shaped irrigation as a mode of environmental expertise.     

管理信息系统中层次类编码数据的递归录入

介绍了用二维关系表存储树型结构的原理,在此基础上提出层次类型编码数据的递归录入法,并给出一个通用递归录入程序。     

Global rainbow distribution under current and future climates

Rainbows contribute to human wellbeing by providing an inspiring connection to nature. Because the rainbow is an atmospheric optical phenomenon that results from the refraction of sunlight by rainwater droplets, changes in precipitation and cloud cover due to anthropogenic climate forcing will alter rainbow distribution. Yet, we lack a basic understanding of the current spatial distribution of rainbows and how climate change might alter this pattern. To assess how climate change might affect rainbow viewing opportunities, we developed a global database of crowd-sourced photographed rainbows, trained an empirical model of rainbow occurrence, and applied this model to present-day climate and three future climate scenarios. Results suggest that the average terrestrial location on Earth currently has 117 ± 71 days per year with conditions suitable for rainbows. By 2100, climate change is likely to generate a 4.0–4.9 % net increase in mean global annual rainbow-days (i.e., days with at least one rainbow), with the greatest change under the highest emission scenario. Around 21–34 % of land areas will lose rainbow-days and 66–79 % will gain rainbow-days, with rainbow gain hotspots mainly in high-latitude and high-elevation regions with smaller human populations. Our research demonstrates that alterations to non-tangible environmental attributes due to climate change could be significant and are worthy of consideration and mitigation.     

Rethinking economies/economic geographies

This paper provides a short introduction to the papers in this special issue on Rethinking economies/economic geographies. It focuses on the diversity within and between Economics and Economic Geography in their performative relationships with economies and economic geographies. Questions of power/knowledge and cross-disciplinarity are raised. Five hoped-for consequences of the debate are identified.     

海底岩石地球化学研究中的“大数据”——PetDB及其应用

PetDB是目前海洋科学及地学领域最重要的基础数据库资源之一,是海底岩石地球化学数据库的旗舰,它为海洋地质和岩石地球化学专业人员提供了最好的"大数据"支持。PetDB综合了全球海底岩石、矿物和包裹体等的元素化学数据、同位素数据和矿物学数据,数据收录全面、完整、更新快,数据格式规范、统一,数据组织结构清晰,数据查询、输出方便快捷,用户体验感强。将面向国内同行详细介绍海底岩石地球化学"大数据"工具———PetDB数据库,包括PetDB的设计理念、使用方法和应用特色,旨在抛砖引玉,倡导基础数据的及时积累和整理,为建立自主的研究型数据库奠定基础,为迎接"大数据"时代的到来做好充分的准备。     

B/S模式下地质图管理系统的设计与实现

截止2008年底,青藏高原1：250000区域地质调查已完成100多幅地质图的建库工作,在此基础上,建立了基于WebGIS的管理系统。该系统基于国产优秀的MapGIS 7-IMS平台进行二次开发,采用B/S结构,与以往的地质软件的C/S模式相比,系统采用了B/S结构,使得系统的维护和更新方便、开发更简单并且共享性强、总...     

NOSQL技术在档案检索中的应用探索

随着国土房管数据量的递增,用户对检索性能的要求越来越高,本文将非关系型数据库引入档案检索中,利用它来提高系统的搜索性能。文章首先介绍基于传统关系型数据库的应用现状及其逐渐呈现出来的问题,然后阐述NOSQL技术在档案检索中体现出来的意义,最后通过与关系型数据库在检索性能上的实验对比,来检验NOSQL技术在档案检索应用中的优良性能。