检索结果-南通市图书馆

Characteristics of Earthquake-Triggered Landslides and Post-Earthquake Debris Flows in Beichuan County

Journal of Mountain Science 2010年第3期7卷 246-254页

作者： ZHUANG Jianqi CUI Peng HU Kaiheng CHEN Xiaoqing GE Yonggang key Laboratory of Mountain Hazards and Land Surface Processes and Institute of Mountain Hazards and environment Chinese Academy of Sciences Chengdu 610041 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

Field investigations and aerial photography after the earthquake of May 12. 2.08 show a large number of geo-hazards in the zone of extreme earthquake effects. In particular, landslides and debris flows, the geo-hazards that most threaten post-disaster reconstruction, are widely distributed. We describe the characteristics of these geo-hazards in Beichuan County using high-resolution remote sensing of landslide distribution, and the relationships between the area and volume of landslides and the peak-discharges of debris flows both pre- and post-earthquake. The results show： 1） The concentration （defined as the number of landslide sources per unit area： Lc） of earthquake- triggered landslides is inversely correlated with distance from the earthquake （DF） fault. The relationship is described by the following equation： Lc = {2.2.64exp（-0.08{2.DF）（R2.= 0.92.6）; 2. 87 % of the earthquake-triggered landslides were less than 15× 10^4 m2.in area, and these accounted only for 5o% of the total area; 84% of the landslide volumes were less than 60×10^4 m{2. and these accounted only for 50% of the total volume. The probability densities of the area and volume distributions are correlated： landslide abundance increases with landslide area and volume up to maximum values of 5 ×10^4m2.and {2. ×10^4 m{2. respectively, and then decreases exponentially. {2. The area （AL） and volume （VL） of earthquake-triggered landslides are correlated as described with the following equation： VL=6.51{2.AL1.02.7 （R2.= 0.92.2.）; 4）Characteristics of the debris flows changed after the earthquake because of the large amount of landslide material deposited in the gullies. Consequently, debris flow peak-discharge increased following the earthquake as described with the following equation： Vpost = 0.842.Vprel-0972.（R2.= 0.982.）（Vpre is the peak discharge ofpre-earthquake flows and the Vpost is the peak discharge of post-earthquake flows）. We obtained the distribution of the landslides based on the above anal

关键词： 5.12.earthquake Landslide Debris flow Magnitude Beiehuan County

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Incremental Study Based on Support Vector Used to Anomaly Detection for Hyperspectral Imagery

Incremental Study Based on Support Vector Used to Anomaly De...

引用

2.10 International Conference on remote sensing (ICRS 2.10)

作者： Liyan Zhang1 Derong Chen2.Yonghua Sun1 1.key Laboratory of 3. Information Acquisition and Application of the Ministry of Education key Laboratory of Integrated Disaster Assessment and Risk Governance of the Ministry of Civil Affairs key Laboratory of Resource {3. and GIS of beijing. Capital Normal University 2. College of Mechanical and Electrical Engineering beijing Institute of Technology beijing Peoples R china

While detecting anomalies in hyperspectral imagery with support vector data description （SVDD）, large numbers of operation was run because of the high dimension character of dataset and the complexity of background and the high miss rate was discovered because of the interfered background by interior anomalies. This paper used incremental support vector data description （ISVDD） method that samples are divided many sub- sample, and incremental study is designed to simplify the computation. On every sub-sample study, optimization is needed according of the support vectors obtained from above sub-sample and current sub-sample data. By the experiment on the HYMAP data, computation complexity of the algorithm decrease obviously and the computation speed increase highly under the similar detection effect compared with SVDD algorithm.

关键词： hyperspectral imagery anomaly detection incremental support vector data description

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

The Monitoring of Eco-environment Quality Trends and Analysis of Driving Factor of beijing:RS ＆ GIS Application Research

The Monitoring of Eco-Environment Quality Trends and Analysi...

引用

中国地理学会百年庆典

作者： Liu Hongqi~(a,b,c),Gong Huili~(a,b,c),Hu Zhuowei~(a,b,c) a College of Resources environment and Tourism,Capital Normal University b key Lab of {2. Information and Acquisition and Application,MOE,beijing,{{2. c beijing Municipal Lab of Resources environment and GIS,beijing,china

＜正＞TM,SPOT and QuickBird images of 2.00～2.08 were taken as data *** remote sensing（RS） and Geographical Information System（GIS） technology, combined with field survey and other auxiliary data, ecological information,including vegetation,land,water resources,air quality,and so on,were ***, the qualitative and quantitative analysis of the spatial and temporal distribution of various eco-{2.al factors was made to determine the main features that impact the eco-{2..

关键词： remote sensing Geographical Information System eco-environment quality assessment eco-environmental status index

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

基于iPlanet技术的数字影像电子商务系统的研究

引用

计算机工程与应用 2002年第5期38卷 204-206页

作者：窦静晏磊常炳国北京大学遥感与地理信息系统研究所北京100871 北京市空间信息集成与3.工程应用重点实验室北京100871

开发了一个电子商务网站系统,用于在线冲印数字影像。在充分论证了几种电子商务解决方案优缺点基础上,详细分析了该系统的需求、实现功能,采用了目前通用的三层系统,应用服务器层采用iPlanet中间件技术。论文重点讨论iPlanet中间件技术... 详细信息

开发了一个电子商务网站系统,用于在线冲印数字影像。在充分论证了几种电子商务解决方案优缺点基础上,详细分析了该系统的需求、实现功能,采用了目前通用的三层系统,应用服务器层采用iPlanet中间件技术。论文重点讨论iPlanet中间件技术的特征及其在电子商务系统应用中的优越性。

关键词：电子商务系统数字影像 iPlanet技术中间件

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Landscape distribution characteristics of northern foothill belts of Tianshan Mountains

引用

Journal of Geographical Sciences 2002年第1期12卷 23-28页

作者： CHENG Wei-ming, ZHOU Cheng-hu, TANG Qi-cheng, YAO Yong-huiZHANG Bai-ping (State key Laboratory of Resources and environment Information System, Institute ofGeographic Sciences and Natural Resources Research, CAS, {2. 100101,{3.) State key Laboratory of Resources and environment Information System Institute of Geographic Sciences and Natural Resources Research CAS Beijing China

The foothill belts of Tianshan Mountains are about 2.0 km long and 60 km wide, and the study area extends from Kuitun city to Fukang city. They are transitional belts between mountains and plains, appearing in three rows of folds with different morphologies and their age becoming younger from south to north. Based on GIS and RS methods, and materials of the previous researchers, this paper deals with the genetics of the foothill belts and their landscape features resulting from folding by neotectonic movements, and also describes their length, width and slope by remote sensing image interpretation. The characteristics of the foothill belts are found to be very important for the surrounding {2. by preventing groundwater from flowing into plains, changing groundwater, increasing flow of surface runoff, in addition to their roles in protecting the surrounding {2.. The purpose of this paper is to provide an in-depth understanding of the foothill belts and influence on its surrounding {2..

关键词： foothill belts foothill landscape geomorphic landscape geomorphic remote sensing Tianshan Mountains

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

River Boundaries Extraction in Mountain Areas for SAR Images with Fusing GIS Information

River Boundaries Extraction in Mountain Areas for SAR Images...

引用

2.11 CIE International Conference on Radar(RADAR 2.11)

作者： Wang Xiaoliang 1 2.Li Chunsheng 2.and Wu Renbiao 1 3.1 Tianjin key Laboratory for Advanced Signal Processing Civil Aviation University of{2. Tianjin 3.03.0 P.R.china 2.School of Electronics and Information Engineering Beihang University {3. 100191 china 3.Defence key Laboratory for ATR Shenzhen University Shenzhen 518060 china

River boundaries extraction on SAR images is valuable for flood monitoring. Traditional methods usually failed in high relief areas. We proposed a river boundaries extraction method to conquer the difficulty to discri... 详细信息

关键词： SAR Information Fusion Segmentation Active Contour Model Level Set

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

构建数字城市的元数据服务体系

引用

计算机科学 2003年第8期30卷 85-87,107页

作者：王浒李琦董宝青李浩川北京大学遥感与GIS研究所数字地球工作室北京100871 北京市信息资源管理中心北京100088 国家信息中心北京100053

Metadata is one of the six key technologies of digital Earth,which is also an important aspect in buildingand implementing the digital City. Based on the technologies and standards of Web Services ,the author came up witha metadata services architecture in the distributed heterogeneous network {3. of digital City. In this paper,the metadata services architecture is described and explained in detail,including the related standards,technologies,that,based on the Web service,to build the metadata service architecture will be practically meaningful for organizing,managing and sharing the information resources in digital City.

关键词：数字城市元数据服务体系城市可持续发展标准化

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

汶川地震触发潜在性泥石流研究--以岷江上游关山沟为例

引用

四川大学学报（工程科学版） 2009年第S1期41卷 70-75页

作者：柳金峰游勇范建容吕娟中国科学院山地灾害与地表过程重点实验室四川成都610041 中国科学院水利部成都山地灾害与环境研究所四川成都610041 中国科学院研究生院北京100049

汶川地震后,由于地震作用,大量的潜在泥石流沟被激活成活动性泥石流沟,这些泥石流沟将在今后较长一段时间内处于活跃期,泥石流暴发规模和频率显著增加,威胁灾区人民生命财产安全,影响灾区重建工作的顺利开展。以岷江上游关山沟为例,初... 详细信息

汶川地震后,由于地震作用,大量的潜在泥石流沟被激活成活动性泥石流沟,这些泥石流沟将在今后较长一段时间内处于活跃期,泥石流暴发规模和频率显著增加,威胁灾区人民生命财产安全,影响灾区重建工作的顺利开展。以岷江上游关山沟为例,初步探讨地震触发潜在性泥石流的成因、起动方式、危害等问题。通过对关山沟震前遥感影像、震后航空影像的解译,结合野外考察、访问,该沟可定性为地震触发的典型潜在性泥石流沟。关山沟由潜在性泥石流而转变成活动性、高频泥石流沟,其成因主要是地震引起了流域内大量的崩塌、滑坡,为泥石流提供了丰富的物源条件。通过估算,关山沟由于地震震动导致流域内发育2.滑坡、2.处崩塌,松散固体物质储量为12.×104m3.关山沟泥石流的起动方式为在一定的降水条件下,流域上游的滑坡转变成泥石流,沿途接纳两侧山坡表层径流冲刷下来的物质,同时强烈冲刷沟床中松散固体物质以增大泥石流规模,从而形成危害性泥石流。关山沟在P=1%、2.的暴雨频率下,泥石流造成堵河的可能性较大。泥石流一旦堵塞主河,其堵塞回水和溃决洪水将严重威胁到沟口上下游人民生命财产的安全,同时也威胁到"2.3.道"的安全通行。

关键词：汶川地震潜在性泥石流沟岷江上游关山沟

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

黄河流域坡高地系统最小生态需水研究

引用

山地学报 2004年第2期22卷 154-160页

作者：张远杨志峰北京师范大学环境学院北京师范大学环境学院水环境模拟国家重点实验室水沙科学教育部重点实验室北京 100875 中国环境科学研究院北京 100012水环境模拟国家重点实验室水沙科学教育部重点实验室北京 100875

以保护和恢复流域坡高地生态系统为目的,对坡高地最小生态需水问题进行研究,提出了坡高地生态需水和生态缺水的计算方法。以黄河流域为实例,在GIS和遥感技术支持下对坡高地最小生态需水量和缺水量进行了计算,并从时空两个尺度揭示了黄... 详细信息

以保护和恢复流域坡高地生态系统为目的,对坡高地最小生态需水问题进行研究,提出了坡高地生态需水和生态缺水的计算方法。以黄河流域为实例,在GIS和遥感技术支持下对坡高地最小生态需水量和缺水量进行了计算,并从时空两个尺度揭示了黄河流域坡高地生态系统最小生态需水的变化规律,研究成果可为流域生态环境建设和水资源合理配置提供依据。

关键词：生态需水坡高地系统时空变化黄河流域

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

The water level simulation for crane habitat optimization in Xianghai Nature Reserve

引用

Journal of Geographical Sciences 2003年第2期13卷 187-194页

作者： ZHANG Yanhong 1 ,DENG Wei 1 ,LIU Zhaoli 1 ,ZHANG Shuwen 1 ,ZHAI Jinliang 2.(1. Northeast Inst. of Geography and Agricultural Ecology, CAS, Changchun 13.012. china 2. Bureau of Sciences and Technology for Resources and {2., CAS, beijing 100864, china) Northeast Institute of Geography and Agricultural Ecology CAS Changchun 130012 China

The probability of crane living in reedy wetlands can reach 100%, at the same time, the area of reed, the water level and adjacent water area are main factors which control the crane's habitat selection. We all know that all these factors are spatially heterogeneous. For the Xianghai wetland safety and to protect the Xianghai wetland habitat of crane, this paper has mainly identified a solution to these problems. The wetland information is extracted from the TM images, which reflect the whole wetland landscape and are very important for both quantitative analysis of remote sensing observation of the earth system and positioning analysis in GIS database that is automatically extracted from DEM. The DEM for Xianghai characteristics of topography is created. On the basis of the GRID SUBMODULE, applying the GIS spatial overlay analysis, the relationship between the water level and the reed area below the water level and the rating distribution maps of reed area above water level is established. When the water level reaches the altitude of 165 m, the reed area, 981.2.ha is maximum, i.e., the water level of 165 m is the optimal.

关键词： crane habitat optimization simulation of water level Xianghai National Nature Reserve CLC number:Q958.1

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：