Development of an Accurate Urban Modeling System Using CAD/GIS Data for Atmosphere Environmental Simulation

This paper presents an urban modeling system using CAD/GIS data for atmosphere environmental simulation, such as wind flow and contaminant spread in urban area. The CAD data is used for the shape modeling for the high-storied buildings and civil structures with complicated shape since the data for that is not included in the 3D-GIS data accurately. The unstructured mesh based on the tetrahedron element is employed in order to express the urban structures with complicated shape accurately. It is difficult to understand the quality of shape model and mesh by the conventional visualization technique. In this paper, the stereoscopic visualization using virtual reality (VR) technology is employed for the verification of the quality of shape model and mesh. The present system is applied to the atmosphere environmental simulation in urban area and is shown to be an useful planning and design tool to investigate the atmosphere environmental problem.     

基于GIS的城市建筑防震减灾系统

城市建筑物的震害预测和震害分析是防震减灾研究的主要内容。文章利用地理信息系统(GIS)的空间分析管理功能,建立了基于GIS的城市建筑物空间数据库,并根据城市建筑物的特点,结合震害预测方法,在ArcView环境下集成了城市建筑物防震减灾计算机系统。     

城市环境噪声模拟与评估系统——“中大声图”的研究与应用

 在城市环境噪声排放模型及噪声传播模型的基础上,考虑建筑物群及林带对噪声的衰减影响,并结合地理信息系统（GIS）研发了城市环境噪声模拟与评估系统—“中大声图”。系统搭建了点线面环境噪声的排放模型和传播模型,特别在线声源道路交通噪声方面,利用GIS获取道路与建筑物信息,加载车辆排放模型,计算了城市尺度的道路交通噪声分布,并利用计算结果在GIS上绘制出交通噪声地图。最后将系统应用于城市交通噪声的模拟和减噪效果评估上,结果表明该系统的算法准确有效。     

Development of Simulation System for the Disaster Evacuation Based on Multi-Agent Model Using

This paper presents a simulation system for the disaster evacuation based on multi-agent model considering geographical information. This system consists of three parts, the modeling for the land and buildings using GIS data, the analysis of disaster evacuation using multi-agent model, and the visualization for the numerical results using the virtual reality technique. By introducing the numerical solver of the natural disaster to the present system, it is possible to evaluate not only the damage of structure but also the damage of human being. Furthermore, it is possible to investigate the appropriate evacuation route by the simulation. The Dijkstra algorithm is used to obtain shortest route to the refuge. In addition, the visualization using virtual reality technique is curried out to understand the feeling of refugee. The present system is applied to the evacuation analysis by the flood flow in urban area and is shown to be a useful tool to investigate the damage by natural disasters.     

基于多媒体仿真的建筑CAD系统模型

为使新型 CAD系统具有更高水平的集成性和替代人工能力 ,提出了一个基于多媒体仿真的建筑结构 CAD系统设计模型 ( MSCAD)。该模型的基本结构包括设计资源处理器、实体建模器、仿真分析器、设计成果演示器。预研系统已实现了形态模型与行为模型的统一表达 ,创造性地综合使用了计算机图形学和计算几何等技术方法。介绍了该模型的技术背景和需求 ,指出了 MSCAD系统模式的可实现性和该软件推广应用的商业前景     

Development of Simulation System for the Disaster Evacuation Based on Multi-Agent Model Using GIS

This paper presents a simulation system for the disaster evacuation based on multi-agent model considering geographical information. This system consists of three parts, the modeling for the land and buildings using GIS data, the analysis of disaster evacuation using multi-agent model, and the visualization for the numerical results using the virtual reality technique. By introducing the numerical solver of the natural disaster to the present system, it is possible to evaluate not only the damage of structure but also the dam- age of human being. Furthermore, it is possible to investigate the appropriate evacuation route by the simu- lation. The Dijkstra algorithm is used to obtain shortest route to the refuge. In addition, the visualization us- ing virtual reality technique is curried out to understand the feeling of refugee. The present system is applied to the evacuation analysis by the flood flow in urban area and is shown to be a useful tool to investigate the damage by natural disasters.     

SuperMap RealSpace GIS在历史建筑三维重建中的应用研究——以杭州市锅子弄34号历史建筑三维重建为例

以始建于20世纪30年代杭州市锅子弄34号历史建筑的三维重建为例,用CAD、3DS Max等建模软件构建建筑主体以及附属建筑、周边植被环境等的三维模型,在SuperMap Object 6R开发平台的基础上进行二次开发;依托SuperMap的RealSpace GIS技术实现在大场景空间环境和室内空间环境下的三维可视化...     

城市三维仿真规划审批系统中建筑模型管理模式的研究

主要研究了三维城市GIS的一个子集——城市三维仿真规划审批系统中建筑物这一主要部分的组织和管理方式,力求加快漫游速度、更符合规划实际工作的要求。     

基于虚拟现实的城市供水管网仿真系统

建立虚拟城市供水管网运行仿真系统,在三维场景中模拟城市供水管网运行工况,有明确的工程意义。首先建立供水管网工程数据库,以保证仿真模型具有较高的精度。进而利用MultiGen Creator构建供水管网阀门、管段等部件三维模型,建立城市供水管网三维模型。最后采用Vega驱动三维模型,通过VC++ MFC程序设计及EPANET工具箱实现运行工况视景仿真。基于虚拟现实的城市供水管网仿真系统可直观显示城市供水管网信息,实现对供水管网拓扑结构及各种运行工况的仿真。该系统克服传统地理信息系统的局限性,并且具有较高准确性和可靠性。     

基于多主体的城市微模拟平台Grid ABGIS研究

为了有效集成基于主体的模型(Agent Based Model, ABM)和地理信息系统(Geographical Information System, GIS),将经典地理信息系统的功能从着重宏观地理格局的描述扩展到注重微观行为机制的刻画,作者提出并设计了一个具备网格计算能力的集成化城市微模拟平台--Grid ABGIS.首先回顾了目前城市微模拟研究进展,通过对城市微模拟系统信息过程进行归纳和总结,从软件工程的角度提出了"七步法"城市模拟信息工程的基本框架;其次分析了通用多主体城市模拟软件平台Grid ABGIS的信息处理流程和相应的系统需求;最后对Grid ABGIS的系统结构、对象体系结构、数据模型和城市主体对象模板进行了详细设计,进而实现了一个ABGIS原型系统.     

虚拟城市及其在城市规划设计与管理中的应用

对实体城市的虚拟包括对城市实体的位置和属性的虚拟、对城市空间视觉形态的虚拟和对某些公共设施使用功能的虚拟3个方面，这些虚拟城市形式分别对于城市规划与设计、城市管理与营运、城市生活与休闲带来了实质性影响，计算机信息技术包括CAD、GIS、VR以厦网络技术等为虚拟城市建设提供了解决方案。     

基于三维城市GIS的交互式三维隧道建模算法

为了建设城市地下空间三维GIS,解决城市地下隧道的三维建模问题,提出一种基于三维城市GIS的交互式三维隧道建模方法,详细讨论了交互式三维隧道建模的各个步骤以及交互控制、空间计算和三角剖分等算法,并以一个正在开展的三维城市GIS项目为基础,介绍了交互式三维隧道建模方法的应用。实践证明,交互式三维隧道建模方法相比传统方法操作更为方便,能够提高城市地下空间三维GIS的工作效率。交互式三维隧道建模方法将为基于三维城市GIS技术的城市空间信息化工作提供重要的技术支撑。     

基于地震损伤次生火灾概率研究

地震的发生会破坏原有的自然平衡和社会稳定,易引起一系列二次破坏,这种破坏在空间上和时间上可能比地震本身更具危害性.其中,火灾是建筑物主要面临的地震次生灾害之一.云南大学新校区地处昆明市呈贡区,位于小江断裂带和普渡河断裂带之间,属地震多发区,且学校内部建有化学实验室和食堂,地震发生后极易引发次生火灾.为了研究校园区域地震次生火灾的发生率,通过MATLAB程序调用SAP2000对一幢RC框架结构进行非线性时程分析,基于Park-Ang双参数损伤模型求解结构在不同强度等级地震作用下的损伤D值,并结合实地调研构建适用于不同使用功能建筑的次生火灾起火概率模型,为云南大学震后火灾救援工作和基于性能的抗震防火设计提供参考.     

Chuetsu earthquake damages in Niigata County of Japan

An Earthquake ML=6.8 occurred on October 23, 2004 in Chuetsu area of Niigata County in Japan, which caused 40 people dead, more than 4500 people injured and 1000000 people homeless; nearly 140000 buildings were damaged or collapsed. The estated total loss of this earthquake was about 3000 billions Yen. In this paper, we investigate the Chuetsu earthquake damage from different aspects, including the seismic outline, seismicity, intensity distribution, wave feature, damage analyses, and economic losses. Finally, experiences and lessons from the earthquake damage are given. The content in this paper may be a reference for structural seismic design and code modification.     

基于GIS的城市规划专题制图

基于一套ＧＩＳ环境（ＡｒｃＣＡＤ）下的专题制图系统，用于设计制作城市规划专题图．此系统继承了ＧＩＳ的综合数据管理功能，可以有效地存贮、管理和使用空间数据、属性数据及制图数据．特别是它融ＧＩＳ的分析功能与ＣＡＤ的图形功能于一体，结合友好的用户界面及丰富的城市规划专题符号库，形成了一套功能强而又方便使用的专题制图系统．着重介绍这一系统的基本组织、数据结构及主要特点，并阐明了ＧＩＳ环境下专题制图的特点与方法     

Chuetsu earthquake damages in Niigata County of Japan

An Earthquake M_L=6.8 occurred on October 23, 2004 in Chuetsu area of Niigata County in Japan, which caused 40 people dead, more than 4500 people injured and 1000000 people homeless; nearly 140000 buildings were damaged or collapsed. The estated total loss of this earthquake was about 3000 billions Yen. In this paper, we investigate the Chuetsu earthquake damage from different aspects, including the seismic outline, seismicity, intensity distribution, wave feature, damage analyses, and economic losses. Finally, experiences and lessons from the earthquake damage are given. The content in this paper may be a reference for structural seismic design and code modification.     

Land potential appraisal for urban land reserve based on GIS：

With the rapid urbanization, land banking has become an important means for rational land use and land configuration optimizing. Rational urban land reserve and supply plan are keys for an urban land banking. GIS has been used to model urban growth, growth at the ruralurban fringe specifically. This paper identifies that the urban land banking potential can be evaluated based on RS and GIS technology. 10 indicators were chosen in the integrated index system. As a case of Metropolitan area in Chongqing, urban land banking potential was evaluated based on RS and GIS technology. With GIS, two steps can help to finish potential analysis of land banking. One is goal driven process, such as the process of planning and definition; the other step is datadriven process, such as the process of Manipulating. The results are used to establish the current land banking plan.      

Land potential appraisal for urban land reserve based on GIS: A case of metropolitan area in Chongqing

With the rapid urbanization, land banking has become an important means for rational land use and land configuration optimizing. Rational urban land reserve and supply plan are keys for an urban land banking. GIS has been used to model urban growth, growth at the rural-urban fringe specifically. This paper identifies that the urban land banking potential can be evaluated based on RS and GIS technology. 10 indicators were chosen in the integrated index system. As a case of Metropolitan area in Chongqing, urban land banking potential was evaluated based on RS and GIS technology. With GIS, two steps can help to finish potential analysis of land banking. One is goal driven process, such as the process of planning and definition; the other step is data-driven process, such as the process of Manipulating. The results are used to establish the current land banking plan.     

二维GIS与三维视景仿真技术的结合及其在视景仿真中的应用

简要介绍了目前3D-GIS基本概念和特点,并以校园视景仿真系统为例,提出了3D-GIS在视景仿真中的解决方案.该系统实现了三维视景系统与二维GIS系统的结合,为3D-GIS在城市视景仿真和虚拟环境中的应用提供了参考方法.     

基于三维大地形模型的降落伞空投仿真系统

降落伞应用日益广泛.为了有效地降低降落伞空投的物资消耗和危险性,开展飞机空投降落伞一体化仿真系统设计具有重要意义.研究了系统的关键技术,运用数字地球技术、三维LOD技术和可视化技术等,实现了大范围三维地表数据的海量存贮与快速表达,实现了投放环境、飞机(队列)飞行、空投降落伞时起航、抛投、降落等多环节一体化模拟仿真.并以VS2010为开发平台,利用ChinaStar GIS组件,设计与开发了基于三维大地形模型的飞机空投降落伞一体化仿真系统.通过对系统的试用和检验表明,系统对降落伞投放环境、飞机(队列)飞行及空投降落伞降落过程的一体化模拟仿真取得了较好的效果,模拟结果具有较高的可靠性,能为实际空投提供可靠的参考信息.