Community,Place and Cyberspace

It is over 30 years since the concept of community without propinquity was first proposed. According to this concept, communities might be spatially far-flung, but nevertheless close-knit, intimate and held together by shared interests and values, rather than by geographical proximity. Although the idea of community without propinquity has been heavily criticised, the advent of advanced telecommunications and the emergence of cyberspace mean that a reappraisal of the concept, and of the changing nature of community generally, is warranted. The paper undertakes such a reappraisal. A review of the literature on cyberspace reveals several reasons why the social effects of advanced telecommunications and the Internet might be less than is sometimes predicted. Setting this discussion in the context of other social science discourses on new urbanism, consumption rather than production as a basis for city life, postmodernism, and 'the third way' in politics, shows that place and local community are, and will continue to be, fundamental to the functioning of society. Cyberspace might have annihilated distance but not place.     

炼铜烟灰制取硫酸铜除铁新工艺研究

研究和比较了各种炼铜烟灰制取硫酸铅除铁工艺,实验结果表明：用氧气或空气氧化配合过氧化法去除炼铜烟灰酸浸液中铁,除铁率90％,过氧化氮氧化深度除铁,除铁率99．8％,溶液中铁含量降至0．01g/L以下。     

Innovation-support organizations in the marine science and technology industry: The case of Quebec's coastal region in Canada

This study examines the roles of innovation-support organizations in their acquisition and diffusion of technological ideas, solutions, and know-how throughout the marine science and technology innovation system. The research is based on a set of case studies that involved semi-structured interviews with directors and managers in three innovation-support organizations: Maritime Innovation (MI), the Interdisciplinary Centre for the Development of Ocean Mapping (ICDOM), and the Marine Biotechnology Research Centre (MBRC). Each of these organizations contributes not only to the development of the marine science and technology industry, but also to research and technology transfer in some of the key areas boasting the highest potential for technological commercialization and applications in the coastal region of Quebec. Central to this analysis is to show how these organizations operate and co-ordinate their activities, and how they formulate their technological and other standard services for the support of business development.     

浅析GPS测量技术在房产基础测绘中的应用

GPS（Global Positioning System）全球定位系统具有性能好、精度高、应用广的特点。在测绘领域,GPS系统已广泛用于大地测量、工程测量、航空摄影测量及地形测量等各个领域。通过GPS静态测量和GPSRTK测量技术在性能特点、作业方法、技术条件及应用效果的分析,指出GPS技术在房产基础测量中具有传统测量技术无可比拟的优势。     

基于组件技术的地理信息系统二次开发--以地下水资源空间分析系统为例

组件地理信息系统不依赖于某一种开发语言，一般利用地理信息控件实现地理信息功能，专业应用功能则直接在通用平台上开发或是插入其它的专业模型分析控件来实现。目前，组件地理信息系统开发模式已成为地理信息系统二次开发的主要模式，该文阐述了组件地理信息系统的基本概念和技术基础，详细介绍了ESRI公司推出的MapObjects控件，结合实例论述了基于组件技术的地下水资源空间分析系统的设计开发过程。     

云南易门狮子山铜矿深部找矿得失

易门狮子山铜矿已是资源严重危机矿山。综合应用地质、地球物理、构造地球化学、专题研究,并采取系统工程对已知矿体延伸进行矿床深部找矿,取得重大突破,但也还存在不足。     

遥感技术在矿化蚀变信息提取及矿产预测中的应用

遥感技术成矿探测的关键在于成矿构造及蚀变矿物信息的提取,以ETM+遥感影像为数据源,结合相关地质资料通过人工目视解译建立构造解译标志,对渝东南地区线性构造解译与环形构造解译,并分析了区内蚀变矿物的波谱特征,针对遥感影像,利用阈值分割、主成分变换及掩膜分析等手段提取了研究区的羟基蚀变信息和铁染蚀变信息。最后结合区内物化探等综合异常信息圈定了6个成矿预测远景区。     

遥感地质技术发展的战略思考

通过对遥感技术和遥感地质发展现状和发展趋势的分析,以经济和社会可持续发展对矿产资源、能源和地质信息的重大需求为牵引,以地质理论、地球系统理论和复杂性科学理论为指导,围绕地质工作的地质矿产调查、地质灾害和环境监测、矿山开发和环境监测的三大战略任务,提出建设和发展地质矿产和能源遥感勘查和评价技术系统、地质灾害和地质环境监测技术系统及业务运行系统、矿山开发和矿山环境监测技术系统及业务运行系统三大应用技术系统和卫星数据采集与地质应用服务系统、全数字化综合航空遥感集成与信息服务系统两大信息服务系统的遥感地质发展战略目标.促进和实现遥感地质分析由定性向定量,遥感地质应用由单技术向技术集成,地质服务由数据向数据、技术和信息的综合服务方向发展和转化.提出了近期和中期重点发展的技术和重点研究领域,讨论了它们的研究现状、存在问题、研究重点和需进一步深入研究的关键技术问题.     

基于“3S”技术土地利用基础图件与数据更新的应用

以潍坊市土地利用基础图件与数据更新项目为例,采用内外业相结合的作业方式,讨论了基于“3S”技术土地利用基础图件与数据库更新方法的应用、关键问题和解决方案以及成果应用。     

Z igB ee 技术及其在地震监测中的应用研究

ZigBee技术是近几年短距离无线通讯技术领域研究的热点之一。文章分析ZigBee技术特点、技术原理及网络硬件实现方式,详细说明其在野外流动地震监测、通讯线路改造、无人值守台站的地震监测及前兆传感器的快速接入等方面的具体应用。