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空间数据是ＧＩＳ的主要研究和表示的对象,其质量的好坏及其在ＧＩＳ中的正确表示是ＧＩＳ工程建设中最重要和最基本的问题。文中运用模糊分析学的理论和方法,在系统地分析了ＧＩＳ空间数据属性不确定性的基础上,提出了模糊关系数据模型,并探讨了其相应的基本操作和运算的原理和方法,对ＧＩＳ的研究和应用具有一定的实用价值。 相似文献
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本文在分析和比较了三维ＧＩＳ中多种数据结构的基础上，重点讨论了线性八叉树编码原理、线性八叉树数据结构以及线性八叉树的生成、显示与操作，并从数据结构的优缺点着眼，提出将ＢＲ 法与线性八叉树相结合的观点；从三维动画技术着眼，提出将原型法、ＣＳＧ 法与线性八叉树相结合的观点，最后提出一种基于多元表示的三维ＧＩＳ系统的构想框架 相似文献
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孔金玲 《地球科学与环境学报》1998,(3)
首次提出了基于ＧＩＳ技术的公路综合选线方法。应用ＧＩＳ技术的空间分析功能,提取公路选线的影响信息;在此基础上,将公路选线问题层次化,并利用层次分析的方法,实现公路选线多因素的综合分析,达到公路综合选线的目的。 相似文献
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结合喜马拉雅山板块运动 Ｇ Ｐ Ｓ 监测资料，较系统的讨论了 Ｇ Ａ Ｍ Ｉ Ｔ／ Ｇ Ｌ Ｏ Ｂ Ｋ 进行精密 Ｇ Ｐ Ｓ数据处理的理论和方法，着重对 Ｇ Ａ Ｍ Ｉ Ｔ 处理各时段解与 Ｇ Ｌ Ｏ Ｂ Ｋ 综合处理单时段解及其处理过程中应注意的有关问题做了较详细的讨论，对高精度 Ｇ Ｐ Ｓ 数据处理和分析具有重要参考价值。 相似文献
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WEB GIS: IMPLEMENTATION ISSUES 总被引：1，自引：0，他引：1
1 ＩＮＴＲＯＤＵＣＴＩＯＮＷｉｔｈｔｈｅｒａｐｉｄｅｘｐａｎｓｉｏｎａｎｄｄｅｖｅｌｏｐｍｅｎｔｏｆＩｎ ｔｅｒｎｅｔａｎｄＷＷＷ (ＷｏｒｌｄＷｉｄｅＷｅｂｏｒＷｅｂ) ,ＷｅｂＧＩＳ (ＷｅｂＧｅｏｇｒａｐｈｉｃａｌＩｎｆｏｒｍａｔｉｏｎＳｙｓｔｅｍ )ｉｓｂｅ ｃｏｍｉｎｇｅｖｅｒｍｏｒｅｐｏｐｕｌａｒａｎｄａｓａｒｅｓｕｌｔｎｕｍｅｒｏｕｓｓｉｔｅｓｈａｖｅａｄｄｅｄＧＩＳｃａｐａｂｉｌｉｔｙｏｎｔｈｅｉｒＷｅｂｓｉｔｅｓ(ＢＯＳＴＯＮｅｔａｌ .,1994 ;ＰＵＴＺ ,1994 ;ＳＨＩＦＦＥＲ ,1995;ＳＯＶＩ… 相似文献
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本文简要介绍了测绘运筹学及其性质：系统科学体系结构；系统特征；系统方法与原理。在此基础上讨论了测绘运筹学与ＧＩＳ的关系及在ＧＩＳ工程建设中的应用。 相似文献
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地理信息系统(GIS)在地震危险性分析中的应用 总被引：2，自引：0，他引：2
简要介绍了地理信息系统（ＧＩＳ）的主要特征、地震危险性分析的一般步骤及其在地理信息系统下的实现方法。以东亚地区地震危险性分析为例,在ＧＩＳ平台下,利用ＧＩＳ的图层叠加和拼接、空间数据查询和综合分析功能,编制了东亚地区地震构造图,划分了该区的潜在震源区,并得到了各潜在震源区相应的地震活动性参数,在此基础上,按１°×１°计算和分析了东亚地区未来５０年超越概率为１０％的峰值地面加速度。 相似文献
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遥感技术（ＲＳ）、全球定位系统（ＧＰＳ）和地理信息系统（ＧＩＳ）的不断发展以及以ＧＩＳ为核心的３Ｓ技术集成,为现代地质学向综合化、系统化、科学化方向发展,提供了强有力的技术支持。３Ｓ技术集成不仅可为地质工作提供及时、可靠的基础信息,而且还可对地质信息进行综合分析、处理,进而对成矿靶区进行科学预测。本文介绍了３Ｓ技术集成及其在地质领域中的应用现状,并就其应用前景作了展望 相似文献
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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. 相似文献
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《极地研究(英文版)》2014,(4)
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 comprehensive academic journal dedicated to presentation of multi-disciplinary achievements in Arctic and Antarctic expeditions and research.Its primary purpose 相似文献
14.
《中国海洋大学学报(英文版)》2014,(4)
<正>Copyright Submfnion of a roanusatpt inks:that the work described has not been published before(exoept In the form of an abstrW or as part of a published lecture,review,or thesis);that it is not under consideration for publication elsewhere that its publication has been approved by ail 相似文献
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《中国海洋大学学报(英文版)》2014,(6)
<正>The Journal of Ocean University of China(Oceanic and Coastal Sea Research)is a comprehensive academic quarterly sponsored by the Ocean University of China,published one volume per year.This journal is devoted to the publication of the theoretical and applied research results on oceanography and marine fisheries.The fieldcovered include the physical,chemical,biological,geo- 相似文献
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Massimo GRECO 《山地科学学报》2014,(6):1383-1384
<正>The 35th IAHR World Congress was held in Chengdu,China from September 8 to September 132013.The title of the conference was:"The Wise Finds Pleasure in Water:Meandering through Water Science and Engineering".During the congress,1239 papers were presented in 139sessions for oral presentations and 7 sessions for poster presentations.After the Congress,a Committee was appointed to select some of the best papers presented at the Congress for publication,after a 相似文献
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As an important component of the cryosphere,sea ice is very sensitive to the climate change.The study of the sea ice physics needs accurate sea ice thickness.This paper presents an electromagnetic-induction(EM) technique which can be used to measure the sea ice thickness distribution efficiently,and the successful application in Bothnian Bay.Based on the electromagnetic field theory and the electrical properties of sea ice and seawater,EM technique can detect the distance between the instrument and the ice/water interface accurately,than the sea ice thickness is obtained.Contrastive analysis of the apparent conductivity data obtained by EM and the value of drill-hole at same positions allows a construction of a transformable formula of the apparent conductivity to sea ice thickness.The verification of the sea ice thickness calculated by this formula indicates that EM technique is able to get reliable sea ice thickness with average relative error of only 12%.The statistic of all ice thickness profiles shows that the level ice distribution in Bothnian Bay was 0.4-0.6 m. 相似文献
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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. 相似文献
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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. 相似文献
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《极地研究(英文版)》2014,(3)
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 相似文献