震后北川县城三维建模方法研究

汶川地震造成北川县城大部分房屋倒塌。本文以震后北川县城为例,在已有城市建模方法基础上,提出了基于航空影像与人工建模结合的震后建筑物、废墟、道路、绿化和小品的三维建模方法。     

基于地震信息的大屏可视化技术研究与应用

为提高指挥大屏信息读取效率,更好地进行防震减灾工作,对指挥大屏地震信息可视化开展了一系列研究,详细探讨了基于地震信息的指挥大屏可视化内容,包括大屏布局、设计思想、颜色搭配、文字表达、图标设计、交互显示与整体展示效果等方面,对地震应急信息的准确完备、快速传递、清晰表达和高效处理有一定提高。     

Visualization of Climate Change and Economic Research Hotspots:Integrating Cited References and Burst Keywords

The study of the economic impact of climate change has received extensive attention from governments and scholars around the world. This paper based on 14 796 literatures that related to climate change and economic from the core database of Web of Science. Integrating the method of co-citation network and burst keywords co-occurrence network to analyze the temporal and spatial changes of research hotspots on climate change and economic impact. The results show that the global literature's number keep a exponential growth trend, rapidly after 2007. Before 2007, the research hotspots primarily centered on the climate change attribution analysis (increased CO₂ emissions from fossil fuels, land use changes, etc.), the impact on natural ecosystems (agricultural production, food security, Arctic ice caps, coastal zones, etc.) and socio-economic System (human health, energy, industry, etc.), and the assessment of economic impac and then focused on the future scenarios of climate change and CO₂ abatement and how to adapt and mitigate the climate change. After 2007, with the introduction of IPCC AR4 and Stern report, further strengthened the research on cost-effective assessment of climate change impact, vulnerability, bioenergy and so on. The research hotspots focus on economics of climate change and trade. In space, the literatures of research hotspots were mainly come from the United States, Canada, Western European countries (UK, France, Germany, Italy, Netherlands), Australia and China.     

基于GMS的北京顺平地区三维地质结构模型

地下水数值模拟软件GMS提供了基于钻孔资料的三维地层生成模块,借助于GMS软件中地层模拟模块,利用钻孔数据、地层剖面资料、地质图和DEM数据,结合虚拟钻孔方法,构建了复杂地质结构区—北京顺平地区三维地层结构模型,模型包括太古宇密云群,长城系、蓟县系、青白口系、寒武系、奥陶系、石炭—二叠—侏罗系、深层第四系和浅层第四系等9组地层,刻画出了各层分布的空间范围,模拟了山区地表高程的起伏变化、断层产生的地层错动等情况,为研究区地质和水文地质条件分析及地下水数值模型的建立奠定了基础。     

三维城市地质信息平台

三维城市地质信息平台综合利用GIS、数字地质、现代数据库、计算机网络等技术,对研究范围的基础地质、水文地质、工程地质、环境地质、地面沉降、地球物理、地球化学、遥感、灾害地质等多专业的地质信息和成果进行集成和综合,实现对地质信息管理、更新维护、检索查询、分析评价、三维地质模拟和成果显示,在此基础上对城市地表与地下空间结构组织与空间资源、地质灾害、地下水资源与地质环境保护、地面沉降监测与防治、城市规划与建设、土地质量与后备资源等进行分析评价和预测模拟。     

全三维地震解释

三维地震为油气工业的增储上产作出了重大贡献，随着采集处理成本的不断降低，周期的不断缩短，全三维处理和叠前深度偏移等技术的推广应用，以及计算机技术的迅速发展，全三维地震解释已成为国内外致力发展的技术。     

基于OpenGL的切片合成法及其在三维地质模型可视化中的应用

介绍了基于 Open GL的剪取变换和累加缓存操作而提出的“切片合成法”,其基本原理就是对三维地质模型等间距裁剪一系列“薄片”,然后在帧缓存的累加缓存中进行迭加合成 ,最后生成地质界面的等深线图或剖面系列 ,它避免了裁剪平面与 TIN求交、等值线追踪等繁琐的操作。此方法在三维地质模型可视化、医学断层扫描三维成像等领域都有应用价值。     

基于PC网络的多通道视景仿真技术

多通道视景仿真系统能够为用户带来强烈的沉浸感和大范围的视野。这类系统通常是以昂贵的专用图形工作站为硬件平台，难以为普通用户接受。文中研究了一种基于PC网络的多通道视景仿真系统，给出了该系统的软硬件结构及实现方法，并分析了系统运行的实验结果。     

WEB-IS (integrated system): an overall view

WEB-IS, Web-based Integrated System, allows remote, interactive visualization of large-scale 3-D data over the Internet, along with data analysis and data mining. In this paper, we discuss the overall structure of WEB-IS. Up until now we have developed three sub-modules geared towards geophysical problems. WEB-IS1 allows geoscientists to navigate through their 3-D geophysical data, such as seismic structures or numerical simulations, and interactively analyze the statistics or apply data-mining techniques, such as cluster analysis. WEB-IS2 lets a user control Amira (a powerful 3-D visualization package) remotely and analyze, render and view large datasets across the Internet. WEB-IS3 is an imaging service that enables the user to control the scale of features to view through interactive zooming. In the near future, we propose to integrate the three components together through a middleware framework called NaradaBrokering (iNtegrated Asynchronous Real-time Adaptive Distributed Architecture, a distributed messaging infrastructure that can be used to intelligently route data between the originators and registered consumers) without regard for time or location. As a result, WEB-IS will improve its scalability and acquire properties of fault-tolerance. WEB-IS uses a combination of Java, C++, and through the use of NaradaBrokering will seamlessly integrate the server-side processing and user interaction utilities on the client. The server takes care of the processor intensive tasks, such as visualization and data mining, and sends either the resulting bitmap image or statistical results to the middleware across the Internet for viewing. WEB-IS is an easy-to-use service, which will eventually help geoscientists collaborate from different sites in a natural manner. It will be very useful in the next 10 years because of the increasing number of space missions and geophysical campaigns.     

EOS/MODIS遥感数据与应用前景

提出了一种利用Vis5d软件实现T213数值预报产品多维立体显示的方法。详细介绍了grib编码和Vis5d的数据格式，提供了建立把T213产品转换为Vis5d格式的软件的具体思路和技巧，介绍了这些软件的使用方法和显示效果，可以在业务中实际应用。