基于WebGis的山西省地质灾害防治管理信息系统设计

山西省地质灾害防治管理信息系统采用多层次结构设计,基于WebGIS、WebServices、分布式海量数据管理、影像金字塔及Bi等技术,通过DataBase服务器、GIS服务器和Web服务器协同工作,提供网络数据服务。根据地质灾害数据特征,兼顾保密与服务的需要,将系统分为"山西省地质灾害信息系统"和"山西省地质灾害防治管理信息系统"两部分,分别布设于内网(专网)和互联网,为地质灾害防治工作及地质灾害调查成果的社会化服务提供"高效、安全"的数据管理平台。     

基于Pushlet的实时WebGIS研究与实现

为满足政府、企业和公众等用户对GIS实时性应用的迫切需求。在分析传统WebGIS采用请求/响应工作模式不足的基础上,利用服务器推送Comet技术,基于Pushlet开源框架和MapGIS IGServer,设计了一种实时WebGIS框架,利用Pushlet订阅/发布机制,实现基于标准的HTTP协议的地理空间信息服务器端实时推送;利用数据库触发器实现更新数据的即时分发;利用富客户端Flex技术进行客户端信息展示。在气象监测预警系统中对该框架的可行性进行验证,为实时WebGIS的开发应用提供新的方法和思路。     

Linux环境并发服务器设计技术研究

讲述许发服务器设计的主要技术，包括多进程服务器、多线程服务器和I／O复用服务器，同时对以上服务器技术的性能进行了简要分析，给出了在Linux操作系统下使用socket实现并发服务器的方法。     

基于WebGIS定制平台的开发与应用

基于柔性设计、定制及框架技术,形成应用型WebGIS定制平台的概念及框架,提炼了平台的高柔性、多粒度功能复用、充分可定制三大特点,进行了数据定制与配置、界面定制与配置、功能定制与配置等功能的研究与设计。基于WebGIS定制平台的开发与应用实践证明:该开发模式实现了多个WebGIS应用系统的敏捷开发,较好地支持了数据共享、功能复用与界面的一致性。     

B/S多层结构的湖泊数据库WebGIS服务系统的设计与应用

B/S多层模型是计算机网络软件工程领域内的一个趋于成熟的系统设计思想。以多层模型的思想构建We-bGIS可以解决系统深层次应用开发的诸多问题,已成为当今GIS研究热点之一。湖泊科学数据库WebGIS服务系统旨在促进数据共享,为科研工作者提供基础数据支持。本文在分析比较几种国内外数据发布系统基础上,以数据仓库的理念为指导,设计了B/S的多层体系结构湖泊数据库WebGIS系统。前台利用了动态服务器主页(ASP)技术,Web服务器采用Microsoft公司的Internet Information Server(ⅡS)。中间层采用SuperMapIS地图发布引擎,后台数据库采用了空间数据库引擎用于管理SQL SERVER企业数据库中存储的海量数据。本文围绕系统构建过程中所用到的方法和技术,探讨了B/S多层结构WebGIS的应用和实现。     

基于WebGIS的村镇土地监察内业处理系统与实现

WebGIS是目前地理信息系统(CIS)发展的一个重要方向,利用WebGIS技术能够实现对土地监察工作及时、有效、科学的管理.本文在分析WebGIS特点和SuperMapIS工作原理的基础上,设计和实现了基于WebGIS的村镇土地执法监察内业处理系统,并对关键技术进行了研究.     

基于云计算的位置服务平台建设研究

云计算作为一种革命性的计算模型在很多行业都成为重要的技术趋势。将云计算应用于空间地理信息领域所形成的空间云计算也逐渐成为整个空间地理信息行业的主流技术。位置服务利用当今高速发展的互联网和多样化的移动终端向用户提供基于位置的信息和娱乐服务。空间信息数据是位置服务平台的重要组成部分,本文首先介绍云计算相关概念,根据对目前位置服务平台存在的问题的剖析提出了基于云计算的位置服务平台建设的思路和平台架构,最后分析了该平台的特点和所形成的产业链。     

基于OSM Buildings生成WebGIS三维建筑日照阴影模型

随着WebGIS和图形学技术的发展,三维GIS已经成为GIS领域的主流,但现阶段发展三维GIS受成本和网速等影响,限制了三维GIS广泛运用。本文供述在ArcGIS Server平台下以HTML5为技术,运用OSM Buildings插件在Canvas渲染出建筑物三维日照阴影模型,简化WebGIS三维可视化的难度。     

基于ArcGIS Server的气象设备监控系统的设计与实现

以ArcGIS Server为技术支撑,对气象设备监控系统进行了深入研究.以JSF和ArcGIS Server技术为基础,结合WebGIS关键技术,以"中国气象局综合气象观测系统运行监控平台--气象设备运行监控子系统"为研究实例,设计了遵循MVC模式的WebGIS模型,并在模型的基础上实现了系统的研发.系统的主要功能包...     

超图平台软件创新:超图GIS云分发服务器(SuperMap iExpress)技术简介

正北京超图软件股份有限公司研发的Super Map i Express是基于云计算技术的GIS分发服务器。它作为GIS云和端的中介,通过服务代理与缓存加速技术,有效地提升了云GIS的终端访问效率,并提供地图、三维瓦片本地发布与多节点更新推送能力,可用于快速构建跨平台、低成本的Web GIS应用系统(图1)。Super Map i Express不仅作为跨平台、低成本的GIS服务器,独立提供瓦片地图服务,并与Super Map i Server 8C服     

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.     

Foreword

正Rapid changes of Arctic sea ice cover have been in the focus of the international climate research community in recent years.Quite a few of nations have completed a large number of related surveys and research projects in the Arctic Ocean.Up to now,China has performed six research cruises to the Arctic Ocean resulting in a significant volume of research output.Improved knowledge on the atmospheree-sea ice-ocean interactions in the Arctic is a     

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     

Exposure ages and radiogenic ages of ureilite(GRV 024516) and ordinary chondrite(GRV 024517) from Antarctica

The GRV 024516 and GRV 024517 meteorite samples collected from Grove Montains,Antactica are ureilite and H5 ordinary chondrite,respectively.Based on the study of mineralogy-petrology,the cosmic-ray exposure ages and gas retention ages of these two meteorites were determinated and calculated.Their cosmic-ray exposure ages are 33.3 Ma,51.7 Ma,and gas retention ages are 1936.8 Ma and 3720 Ma,respectively.The ureilite contains diamond,graphite and amorphous C,which are mainly carrier of noble gases indicating obviously shock metamorphism effects,which induced 40Ar partial loss.The H5 chondrite indicates thermal metamorphism of parent body,its gas retention age fall the range between 3220 Ma and 4510 Ma of the least shocked H5 chondrites