基于WebGIS的黄河水污染应急信息系统研究

利用基于WebGIS体系架构,结合Google Map API与Ajax技术,设计了黄河流域突发水污染应急信息系统。系统由监控、水污染扩散自动测报、GIS数据管理、三维虚拟场景和应急响应5个子系统构成。开发的关键技术:应用Rails进行敏捷Web开发;基于Google API技术构建WebGIS;应用Ajax实现界面和用户的互动操作与数据请求;利用GoogleEarth进行动态三维模拟;借用DAO设计模式封装数据等。     

Pornography-seeking behaviors following midterm political elections in the United States: A replication of the challenge hypothesis

The current study examined a prediction derived from the challenge hypothesis; individuals who viciously win a competition of rank order will seek out pornography relatively more often than individuals who viciously lose a competition. By examining Google keyword searches during the 2006 and 2010 midterm elections in the United States, the relative popularity of various pornography keyword searches was computed for each state and the District of Columbia the week after each midterm election. Consistent with previous research examining presidential elections and the challenge hypothesis, individuals located in traditionally Republican states tended to search for pornography keywords relatively more often after the 2010 midterm election (a Republican victory) than after the 2006 midterm election (a Democratic victory). Conversely, individuals located in traditionally Democratic states tended to search for pornography relatively less often following the 2010 midterm election than they did following the 2006 midterm election.     

Optimal haulage routing of off-road dump trucks in construction and mining sites using Google Earth and a modified least-cost path algorithm

This study presents new software, called Google Earth-based Optimal HAulage RouTing System (GEOHARTS), to improve the functionality of Google Earth for optimal haulage routing of off-road dump trucks in construction and mining sites. A modified least-cost path algorithm, which is applicable to working areas with both paved and unpaved temporary roads and can consider the effects of terrain relief and curves along a route on the route planning, was proposed and utilized for the software development. GEOHARTS can determine optimal haulage routes between loaders and dumps that ensure the least travel time or fuel consumption of off-road dump trucks and can visualize the results using an embedded 3D render window of Google Earth. The application to the Pasir open-pit coal mine in Indonesia demonstrates that GEOHARTS could provide a rational solution to support the truck haulage operations.     

基于Google Earth的测量控制点非涉密信息集成与应用

介绍一种利用Google Earth建立和管理相关测量控制点位的非涉密信息数据库的方法,集成的相关测量控制点信息数据库使实际测绘工作效率得到提高。     

在专利检索中的读秀检索工具的技巧分析

读秀中文学术搜索工具是目前最全的中文学术搜索引擎.与其他检索工具相比,读秀在数据库的涵盖范围以及检索方式上都有独到之处,是专利检索的重要工具之一.以实际专利申请为案例,介绍了读秀的基本检索语法以及进阶技巧,介绍了读秀与Google二者联用的检索方式对于提高检索效率的优势.     

基于ArcScene+SketchUp的小区三维可视化研究与实现

三维GIS是当今的发展趋势之一.小区三维可视化是构建数字城市的前提和基础.本文分析了目前三维GIS的发展情况.结合小区三维可视化的特殊性,以及兼顾二、三维GIS平台数据一致性,本文选择以Google SketchUp+ArcScene的方法,实现小区三维可视化,特别对日常不易观察的地下管网也实现了三维可视化.     

基于Google Earth影像地图数据获取的研究

将真实的遥感影像图片同传统的矢量数字地图有机地结合在一起,制作成清晰直观的影像数字地图,已经成为现今GIS系统开发的一种趋势,但专业的影像数据购买费用昂贵,大大提高了系统开发成本。现提出一种从Google Earth平台中快速提取免费的、高分辨率的遥感影像图片的方法,利用矢量数字地图中的电子地理信息对影像图片进行地图校正和信息补充,能构成一幅完整的影像数字地图,降低开发成本,提高了GIS系统的真实性、直观性和实用性。     

基于Google Earth的导航电子地图设计

文中对Google Earth的二次开发进行了研究,基于MFC进行软件编程,设计了导航电子地图软件。通过调用Google Earth API函数和Windows API函数,将 Google Earth 视图窗口嵌入到软件界面中,使用钩子技术实现在Google Earth视图窗口中右键弹出菜单,结合CMarkup类和BasicExcel类实现在电子地图上添加航迹点和航线,从而实现了在电子地图上进行航迹规划和显示实时航迹的功能。经过实际运行,软件执行效果良好,很好地完成了各种功能。     

网络信息搜索技术的研究进展

搜索技术可以分为以分类目录为主的搜索引擎、以网页全文检索为主的搜索引擎和新兴的搜索技术。其中，对称搜索技术是当今搜索技术的代表，本文从对称搜索技术的优越性、对称性、对称搜索引擎的收录范围以及对称搜索技术在商业中的应用三个方面对其进行了介绍。Google是互联网信息搜索技术的代表，文章重点介绍了Google中的对称搜索技术以及Google进行高速搜索的关键一索引，从中可以了解到Coogle取胜的原因。     

基于Android平台的路径日记系统开发与设计

随着世界信息产业和通讯设备制造产业的迅猛发展,手机已经成为人们日常生活中不可缺少的一部分。智能手机日益趋向于移动智能综合服务平台方向的发展。可以预想在未来的世界,手机将为人们提供移动办公、信息分享和获取、电子支付、游戏娱乐等等的服务,而地图导航就是其中一个非常重要的应用服务。