基于WebGL的二维三维融合态势可视化设计及关键技术研究

战场态势可视化通过对作战对象的几何特征和拓扑关系的展现,使得复杂战场信息数据易于理解,以直观的方式展示大量战场信息分析的结果。本文阐述了基于WebGL的二三维融合态势可视化系统架构,提出了多源数据的统一管理、二三维军标一体化表达、基于WebGL的显示引擎技术,实现了多种态势信息综合显示和战场态势空间分析功能。通过大量真实空间数据的测试,本文提出的方法表现了良好的渲染效果。     

基于WebGL的三维管线轻量可视化方法

数字城市和智慧社会对综合管线信息三维轻量可视化的需求越来越多。针对全市大范围三维管线丰富的几何、材质与纹理等多细节层次信息三维轻量可视化难题,本文设计实现了基于Web GL的三维管线轻量可视化方法。该方法针对三维管线数据设计了动态组织调度策略,通过异步加载、可见性剔除等技术,把视点相关的管线和管点信息动态接入并实时生成三维模型,基于Web GL以GPU硬件加速的方式进行实时渲染绘制。典型城市综合管线信息管理应用实验表明,该方法能够在网络环境下各种终端上实现多种类型管线多细节层次三维模型的实时真实感可视化。     

时空过程网络可视化模拟与分析服务——以溃坝洪水为例

洪水溃坝等复杂灾害现象的时空过程模拟分析,是当前国际地理信息科学热点研究方向之一。随着网络的普及化,公众对GIS时空分析模型的网络实时集成和可视化分析提出了迫切的需求。本文以溃坝洪水为例开展了时空过程网络可视化模拟与分析服务研究,利用Web GL、HTML5、Ajax、Web Service、GPU并行计算等技术手段,通过探讨溃坝洪水时空模型计算优化、网络三维可视化模拟与动态交互分析等关键技术,研发了原型系统并进行应用实验。实验结果表明,本文研究成果有助于实现时空过程信息的网络发布,在线影响分析及动态可视化服务,可为分布式网络环境下溃坝洪水等时空过程信息管理和应急决策提供科学依据和技术支持。     

专题地图属性信息的Squarified树图可视化

提出一种面向专题地图属性信息的Squarified树图可视化方法,生成嵌入式的数据可视化模块,应用于C#和Arc Engine搭建的GIS原型系统,实现了地图及属性表交互下专题地图属性信息的树图窗体可视化及树图符号可视化。该方法是Treemap理论与GIS可视化方法的有效融合,为研究地学数据层次化表达奠定了基础。     

中国国家自然地图集——电子地图集的研制

该文包括三部分:(1)中国自然资源与环境空间信息的系统集成与形象显示。"中国国家自然地图集-中国自然资源与环境的形象显示与虚拟》(电子图集)在"中华人民共和国国家自然地图集"的基础上,再度创作,信息重组,并有所创新;(2)体系结构和关键技术:体系结构和技术系统,关键技术问题的解决(开发平台的选择、地理信息的三维数据模型与三维可视化、地理信息的动态数据模型与时态可视化、虚拟地图可视化、多源多类数据的集成);(3)主要创新与特色:独特的交互界面结构,别致的动态交互工具,各种形式的动态地图,丰富的三维地图浏览,生动形象的三维地形虚拟飞行浏览,新颖的多种表达方式的联合,查询检索与地图分析功能。     

多维可视化技术在地理空间元数据检索中的应用研究

基于信息可视化技术的数据检索是一个新的研究领域。在地理空间元数据检索过程中,多维可视化技术将有助于显示检索过程,改进检索结果,提供数据间隐含信息来提高检索精度。本文基于地理空间元数据的特点,对三种可用的多维可视化技术:平行坐标、星状图和散点图矩阵的形式和特点进行了分析。同时研究了地理空间元数据检索的关键技术:可视化技术、交互浏览、数据组织和检索算法。最后探讨了可视化检索的评估理论和方法。     

遥感大数据实时渲染与交互可视化研究

数据可视化是遥感应用的重要服务出口。针对静态的预生成瓦片地图难以满足数据查看、地图配置、空间分析等专业应用问题,本文提出了一套面向遥感大数据的实时渲染与交互可视化的解决方案。在渲染节点构建影像的渲染瓦片结构,以提高数据的读取速度;在可视化服务上,提出“数据-计算”相一致的负载均衡策略,优化地图的渲染效率;在可视化服务方面,设计交互的地图服务接口。与传统技术的对比分析表明,该解决方案不但实现了遥感大数据的实时渲染与交互可视化,并且达到了与预生成瓦片地图服务相当的服务性能。基于这一解决方案,研发了遥感大数据的动态可视化原型,并在影像数据实时查看、可视化计算、可视化分析等方面开展了示范应用。     

基于室内定位数据的群体时空行为可视化分析

室内定位数据记录了用户在室内空间活动的时空轨迹,是研究人群室内行为的重要信息源。室内数据时空耦合、分布复杂,可视化分析可以更好地揭示其规律。然而,与室外数据不同,室内数据具有时空粒度细、定位精度高等特点,与POI之间的空间关系更为明确,其轨迹受到室内设施和空间的制约,出现高维和不规则的特征,而这给室内行为研究提供依据的同时,又给可视化分析带来一定的挑战。现有的可视化方法主要应用于室外定位数据,关注轨迹自身的活动轨迹分析,往往忽略了所经过POI语义信息表达。针对这一问题,首先分析室内空间结构与定位数据的特征,阐述室内空间可视化分析的特殊性;在此基础上,面向室内人群的时空分布、移动模式及相关POI之间的对比、关联分析的需求,细化可视化分析的内容,明确可视化分析与展示的对象,并设计数据结构;从数据结构、可视化方法、展示图件及用户交互4个层次构建时空行为可视化分析模型;基于上述方法,采用WebGIS和WebGL技术综合设计和实现了面向商场定位的商场客流分析系统;最后,通过某一大型商场的用户定位数据进行可视化分析,从而验证了研究成果的正确性和有效性。     

矿体线框模型编辑器的设计与开发

矿体建模是矿山可视化的重要内容之一。在矿体建模过程中,模型编辑是建模的关键环节。本文从软件开发的角度,探讨了三维矿体线框模型编辑器的设计与开发方法。介绍了开发环境、建模方法、空间数据模型以及模型编辑等关键技术,并重点讨论了人机交互编辑的具体实现过程。该编辑器已经能够在三维可视化环境中交互绘制矿体剖面轮廓线,并通过轮廓线快速地构造矿体的线框模型。最后以矿体断面图为实例验证了该编辑器的有效性和易操作性。     

斜角坐标系图的专题地图量化信息可视化方法

引入量化图形中种类最为丰富的斜角坐标系图,作为专题地图的主题图形,用于统计地图制作,拓展了专题地图量化信息可视化的表示方法。重点介绍了基于斜角坐标系图的专题地图量化信息可视化应用程序开发的设计思想,通过分析斜角坐标系图形的构图特点和可视化变量,抽象出了一个基础菱形。基于MapInfo软件中的Map-Basic宏语言,设计了斜角坐标系量化图形基础菱形的标准过程,通过调用基础菱形的标准过程,可以实现单坐标系图形和组合图形的绘制。作者借助MapBasic的工程文件连接各个应用程序模块,开发出了以单坐标系、双坐标系和中心组合图形模块为中心的专题地图量化信息可视化应用程序,并实现了量化图形自动排序、手工排序、图形整体移动等功能。最后以河北省1990、1995、1998年第一、二、三产业产值的实际数据,绘制了以三坐标系中心组合图形为主题图形的专题地图,对引入的斜角坐标系量化图形进行应用效果的实例验证。     

Thermohaline structure inhomogeneity associated with polynia at the northern margin of Emery Ice-shelf

Based on the hydrographic data in austral summer during the 22nd Antarctic Expedition of China(2005/2006),some features can be found about the northern margin of Emery ice shelf as follows.The heat content in the surface layer(0-50 m) at the eastern end and the western end of the ice-shelf margin is much higher than that at the middle.The upper mixing-layer depth and the seasonal thermocline depth at the middle of the ice-shelf northern margin are much shallower than those at the both ends.However there is much less difference between the middle and the ends in the bottom layer.The remote sensing photos show that the inhomogeneity in the surface-layer water is closely related to the spatial distribution of the floes and polynia in the area.     

Phylogenetic analysis of cultivable bacteria isolated from Arctic sea-ice

Phylogenetic analysis based on 16S rDNA of 8 strains of cultivable bacteria isolated from Arctic sea-ice was studied.The results showed that strain BJ1 belonged to genus Planococcus,which was a genus of low mole percent G C gram-positive bacteria;strain BJ6 belonged to genus Burkholderia of β-proteobacteria and the rest 6 strain all belonged to γ-proteobacteria,of which strain BJ8 was a species of Pseudoalteromonas,strain BJ2-BJ5 and BJ7 were members of genus Psychrobacter.Phylogenetic analysis also indicated that bacteria of genus Psychrobacter of the isolates formed a relatively independent phylogenetic cluster in comparison with other bacteria belonged to genus Psychrobacter.     

Information for authors

正1 Aims and Scope Advances in Polar Science(APS)is an international,peer-reviewed journal jointly sponsored by the Polar Research Institute of China and the Chinese Arctic and Antarctic Administration.APS is a comprchensive academic journal dedicated to presentation of multi-disciplinary achievements in Arctic and Antarctic expeditions and research.Its primary purpose is to publish achievements in fundamental research,applied     

Advances in Polar Science CONTENTS(Volume 25,2014)

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Guide to Authors： Journal of Mountain Science

<正>AIMS AND SCOPE(Editorial Policy)The Journal of Mountain Science(JMS)is devoted to mountains and their surrounding lowlands-ecoregions of particular global importance,with a particular emphasis on the important highlands/mountains in the world,such as the Tibetan Plateau,the Himalayas,the Alps,the Andes,the Rockies and many other mountain ranges of our planet.     

Journal of Mountain Science(JMS)

<正>The Journal of Mountain Science(JMS),founded in2004,is an international English-language journal on mountain sciences.JMS is supervised by the Chinese Academy of Sciences(CAS),sponsored by the Chengdu Institute of Mountain Hazards and Environment,CAS,published by Science Press China,and distributed by Springer exclusively throughout the world(excluding Mainland China).The JMS is published bimonthly,fulltexted in SpringerLink and CNKI,indexed/abstracted by     

Preliminary study on plasma membrane fluidity of Psychrophilic Yeast Rhodotorula sp.NJ298 in low temperature

The ability of cell to modulate the fluidity of plasma membrane was crucial to the survival of microorganism at low temperature. Plasma membrane proteins, fatty acids and carotenoids profiles of Antarctic psychrophilc yeast Rhodotorula sp. NJ298 were investigated at -3 ℃, 0 ℃ and 8 ℃. The results showed that plasma membrane protein content was greater at -3 ℃ than that at 8 ℃, and a unique membrane polypeptide composition with an apparent molecular mass of 94.7 kDa was newly synthesized with SDS-PAGE analysis; GC analysis showed that the main changes of fatty acids were the percentage of unsaturated fatty acids (C18∶ 1 and C18∶ 2) and shorter chain saturated fatty acid (C10∶ 0) increased along with the decrease of the culture temperature from 8 ℃ to -3 ℃; HPLC analysis indicated that astaxanthin was the major functional carotenoids of the plasma membrane, percentage of which increased from 54.6±1.5% at 8 ℃ to 81.9±2.1% at -3 ℃. However the fluidity of plasma membrane which was determined by measuring fluorescence anisotropy was similar at -3 ℃, 0 ℃ and 8 ℃. Hence these changes in plasma membrane's characteristics were involved in the cellular cold-adaptation by which NJ298 could maintain normal plasma membrane fluidity at near-freezing temperature.     

Relationship of Arctic sea ice and Northern Hemispheric 500 hPa Polar vortices

Using the NCEP/NCAR reanalysis monthly 500 hPa height data on a 2.5 latitude-longitude grid and 1°×1° sea ice data,the polar vortex area,intensity index and arctic sea ice area index are calculated respectively,and the meridional distribution,period variation and the abrupts in the long range trend are analyzed to study their relationship.The results show that the meridional distribution of sea ice and polar vortex h-ave distinctive difference,the relative positions of them are different in the eastern and western hemispheres,and exept they have periods of 4 months,quasi half year,quasi year,4-5 years and 10 years commonly,and each of them has its own respective variation as well.The sea ice area is decreasing apparently since 1980's,so is the polar vortex area,but their abrupt changge time are different totally.The area of sea ice and polar vortex has prominent positive correlation,but the relationship of sea ice intensity,polar vortex intensity,polar vortex area is complicated.     

Author Index for Journal of Mountain Science Volume 11,2014,pp 1-1656

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