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post-earthquake assessment of building damage degree using LiDAr data and imagery

science china(Technological {2.) 2008年第S2期51卷 133-143页

作者： LI ManChun1,CHENG Liang1,2.GONG JianYa2.LIU YongXue1,CHEN ZhenJie1,LI FeiXue1,CHEN Gang1,CHEN Dong1 & SONG XiaoGang3 1 Department of Geographic Information science,Nanjing University,Nanjing 2.0093,china 2.{2. Key laboratory of Information Engineering in Surveying,Mapping and remote sensing,Wuhan University,Wuhan 430079,china 3.state Key laboratory of Earthquake Dynamics,institute of Geology,china Earthquake Administration,beijing 10002.,china Department of Geographic Information science Nanjing University Nanjing 210093 China state Key laboratory of Information Engineering in Surveying Mapping and Remote Sensing Wuhan University Wuhan 430079 China state Key laboratory of Earthquake Dynamics Institute of Geology China Earthquake Administration Beijing 100029 China

Various methods have been developed to detect and assess building's damages due to earthquakes using remotely sensed *** the launch of the high resolution sensors such as IKONOS and QuickBird,it becomes realistic to identify damages on the scale of individual *** the low accuracy of the results has often led to the use of visual interpretation ***,it is very difficult to estimate the degree of building damage(*** damage,moderate damage,or severe damage) in detail using the existing ***,a novel approach integrating LiDAr data and high resolution optical imagery is proposed for evaluating building damage degree *** approach consists of two steps:3D building model reconstruction and rooftop patch-oriented 3D change ***,a method is proposed for automatically reconstructing 3D building models with precise geometric position and fine details,using pre-earthquake LiDAr data and high resolution ***,focusing on each rooftop patch of the 3D building models,the pre- and post-earthquake LiDAr points belonging to the patch are collected and compared to detect whether it was destroyed or not,and then the degree of building damage can be identified based on the ratio of the destroyed rooftop patches to all rooftop *** novelty of the proposed approach is to detect damages on the scale of building's rooftop patch and realize quantitative estimation of building damage degree.

关键词： post-earthquake assessment building damage degree rooftop patch LiDAr imagery

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Characterization of plastic flow in two Zr-based bulk metallic glasses

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science china(Technological {2.) 2006年第4期49卷 414-424页

作者： XING Dongmei1,2. ZHANG Taihua1, LI Weihuo3 & WEI Bingchen3 1. state Key laboratory of Nonlinear Mechanics (LNM), {2. of Mechanics, chinese academy of Sci- ences, beijing 100080, china 2. College of physics and Electronic Information science, Tianjin Normal University, Tianjin 300074, china 3. National Microgravity laboratory, {2. of Mechanics, chinese academy of sciences, beijing 100080, china 1. state Key laboratory of Nonlinear Mechanics (LNM) Institute of Mechanics Chinese Academy of Sciences Beijing 100080 China 2. College of physics and Electronic Information science Tianjin Normal University Tianjin 300074 China 3. National Microgravity laboratory Institute of Mechanics Chinese Academy of Sciences Beijing 100080 China

plastic deformation behaviors of Zr65Al10Ni10Cu15 and Zr52.5Al10Ni10Cu15Be12.5 bulk metallic glasses (BMGs) are studied by using the depth-sensing nanoindentation, microindentation and uniaxial compression. The Be-containing BMG exhibits a signifi- cantly improved overall plastic strain compared with the Be-free alloy during compressive tests. Both BMGs show a loading-rate-dependent serrated flow during nanoindentation measurements, but the Be-containing alloy exhibits a much lower critical loading rate for the disappearance of the serration than the Be-free BMG. The shear band patterns de- veloped during plastic deformation are investigated by microindentation technique, wherein much higher shear band density is found in the Be-containing alloy than in the Be-free alloy, indicating an easier nucleation of shear bands in the former BMG. The dif- ference in the plastic deformation behavior of the two BMGs can be explained by a free volume model.

关键词： Bulk metallic glass, plastic deformation, shear band, nanoindentation.

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regional differences and determinants of built-up area expansion in china

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science china Earth {2. 2007年第12期50卷 1835-1843页

作者： HUANG JiKun1,2.ZHU LiFen3,1 & DENG XiangZheng1,2.1 Center for chinese Agricultural policy,chinese academy of sciences,{2.,china 2.institute of Geographic sciences and Natural resources research,chinese academy of sciences,{2.,china 3 research Center of the Economy of the Upper reaches of the Yangtze river,Chongqing Technology and Business University,Chongqing 400067,china 1. Center for chinese Agricultural policy Chinese Academy of Sciences Beijing 100101 China 2. institute of Geographic sciences and Natural resources research Chinese Academy of Sciences Beijing 100101 China 3. research Center of the Economy of the Upper reaches of the Yangtze river Chongqing Technology and Business University Chongqing 400067 China

Based on remote sensing data on land use provided by the {2. and socio-economic data collected by the authors,this paper analyzes the trends and regional differences in built-up area(BUA) expansion in china from the late 1980s to 2.00,and empirically estimates the major determinants of BUA expansion in different regions in 1996―*** 1989―2.00,although china's overall BUA expansion accelerated,the trends differed significantly among *** expansion in the central and western regions accelerated significantly,but it slowed down considerably in the east-ern *** estimation results from our econometric analysis reveal that BUA expansion in the eastern region reached a period when economic growth had no further significant impact on per capita BUA,the land utilization in this region has become more intensive with further expansion of the *** the central and western regions,the BUA has expanded remarkably due to the relatively more flexible land development policies and the relatively cheap land ***,as the econ-omy continues to grow rapidly,policies relating to BUA expansion and cultivated land reductions may face more serious challenges in the central and western regions.

关键词： built-up area, land use, regional difference, determinants, china

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ON IMprOVEMENT OF BArE SUrFACE SOIL MOISTUrE ESTIMATION WITH L-BAND DUAL-pOLArIZATION rADAr

ON IMPROVEMENT OF BARE SURFACE SOIL MOISTURE ESTIMATION WITH...

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遥感定量反演算法研讨会

作者： Jiancheng Sh (state Key laboratory of {2. sensing science, institute of remote sensing applications, beijing, china)

The capability to predict global water- and energy-cycle consequences of Earth-system variability and change is one of the key issues in the Earth-system science study. It requires the improved capability to monitor spatial and temporal distributed soil moisture accurately. On the capability of the instruments side, the available active microwave sensors, such as ASAr on ENVISAT, rADArSAT, and pALSAr on ALOS, do not provide the capability to monitor global soil moisture information at the temporal scale required in the atmospheric and hydrologic models. The passive microwave sensor AMSr-E on the EOS-Aqua has the high temporal resolution, but its capability is limited to low vegetation and very shallow surface layer. SMAp, with both active and passive L-band microwave instruments, will provide a significantly improved capability of monitoring soil moisture at the spatial and temporal sampling scales required by modeling and prediction of representing soil moisture related processes in the atmospheric and hydrologic models.

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A hybrid matching method for geospatial services in a composition-oriented environment

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science china(Technological {2.) 2010年第S1期53卷 213-220页

作者： LUO An 1,2.WANG YanDong 1,2.& CHEN ShengHua 2.1 state Key laboratory of Software Engineering,Wuhan University,Wuhan 430072.{2. 2.state Key laboratory of Information Engineering in Surveying,Mapping and remote sensing,Wuhan University,Wuhan 430079,{2. 1. state Key laboratory of Software Engineering Wuhan University Wuhan 430072 China 2. state Key laboratory of Information Engineering in Surveying Mapping and Remote Sensing Wuhan University Wuhan 430079 China

With the development of Internet and GIS,large volumes of spatial data,powerful computing resources and many spatial data processing functions are published in the form of Web *** suitable geospatial services in the composition-oriented environment is a crucial *** semantic Web provides a kind of technology to find and compose various service resources automatically through the *** paper proposes a hybrid method for the semantic matching of geospatial *** method includes two *** 1 puts forward a multi-level semantic matching approach,which matches single geospatial service at four levels:classification,input/output,precondition/effect and the quality of service(QoS).This multi-level matching approach makes single service matching quicker and more *** 2.puts forward a matching algorithm for a geospatial service chain based on the *** algorithm adopts a trace algorithm,taking account of the effect of the *** restricts the input/output parameters of the current service by the input/output parameters of service chain,pre-service and *** matches the atomic service dynamically in a composition-oriented environment,and accurately converts the abstract model of geospatial services into an executable geospatial service chain.A case study of the flood analysis for the poyang Lake illustrates the effectiveness of our context-based matching method for geospatial services.

关键词： geospatial services semantic context composition service match

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Image City sharing platform and its typical applications

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science china(Information {2.) 2011年第8期54卷 1738-1746页

作者： SHAO ZhenFeng & Li Deren state Key laboratory for Information Engineering in Surveying,Mapping and {2. sensing,Wuhan University,Wuhan 430079,china 1. state Key laboratory for Information Engineering in Surveying Mapping and Remote Sensing Wuhan University Wuhan 430079 China

In this paper,the trend of urban spatial information sharing service from the electronic map to image is analyzed and its sharing framework based on service-oriented architecture is ***,the service implementation,feedback data service procedure and its processing service model are explored. Based on the software with independent intellectual property rights,image city of Taizhou is developed as an example to realize various image data and processing servicesLastly,the bright future prospects of image city are described.

关键词： Image City service-oriented architecture image data service function service model service

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Spatial distribution of wind erosion and its driving factors in china

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Journal of Geographical sciences 2001年第2期11卷 127-139页

作者： ZHANG Guo-ping~1, ZHANG Zeng-xiang~1, LIU Ji-yuan~2.(1. institute of remote {2. Application, CAS, beijing 100101, china 2. institute of Geographic sciences and Natural resources research, CAS, beijing 100101, china) institute of remote {2. Application CAS institute of Geographic sciences and Natural resources research CAS

Based on remote sensing and geographic information system, the spatial distribution of nation-wide wind erosion is studied, and the 1∶100 000 national map of soil erosion by wind in {2. is made. Wind speed, soil dryness,NDVI, soil texture and the slope of land surface are the key factors to wind erosion. The relations between wind erosion and each factor are discussed. The method of principal component is used to pick up the information included in the five factors, and the wind erosion dynamic index (WEDI) is established. Its comparison with therS/GIS derived data shows thatWEDI can reflect the potential capacity of soil erosion by wind. The dynamic process of the wind erosion is studied to reveal the distribution of the most intense wind erosion regions and the dominant factors in these regions. All these studies may greatly help the mitigation of wind erosion of soil.

关键词： remote sensing geographic information system wind erosion of soil desertification control in china WEDI

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Land cover changes based on plant successions: Deforestation, rehabilitation and degeneration of forest in the upper Dadu river watershed

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science china Earth {2. 2005年第12期48卷 2214-2230页

作者： YAN Jianzhong1,2.3, ZHANG Yili1, BAI Wanqi1, LIU Yanhua4, BAO Weikai5, LIU Linshan1, 2.& ZHENG Du1 1. institute of Geographic sciences and Natural resources research, {2., beijing 100101, china 2. Graduate School of the {2., beijing 100039, china 3. College of resources and Environment, Southwest Agricultural University, Chongqing 400716, china 4. The Ministry of science and Technology, p. C. china, beijing 100862. china 5. Chengdu institute of Biology, {2., Chengdu 610041, china 1. institute of Geographic sciences and Natural resources research Chinese Academy of Sciences 100101 Beijing China 2. Graduate School of the chinese academy of sciences 100039 Beijing China 3. College of resources and Environment Southwest Agricultural University 400716 Chongqing China 4. The Ministry of science and Technology P. C. China 100862 Beijing China 5. Chengdu institute of Biology Chinese Academy of Sciences 610041 Chengdu China

To link regional land use/cover changes with environmental effects, land cover changes are required to reflect vegetation successions, whereas the land cover classification systems commonly used nowadays cannot serve this purpose. In this paper, a new land cover classification system is established in which land covers are classified by the vegetation succes-sions, taking Zamtang County, Barkam County and Jinchuan County in the upper Dadu river watershed as a study area. Using multi-temporal remote sensing images, the land cover data of 1967, 1986 and 2.00 are obtained by means of integration of unsupervised classification and visual interpretation methods. The database facilitates the study of land use/cover changes, en-vironmental effects and ecological construction. Land cover changes reflect the main ecological processes in the upper Dadu river watershed. The landscape composed mainly of grasslands, wildwoods and alpine scrubs in 1967 was changed to that of grasslands, secondary forests, al-pine scrubs, fragmentary wildwoods, artificial forests, secondary scrubs in 2.00, meanwhile, the landscape got more fragmentized. The total area of the forests decreased by 9.43%. Study results have shown the process of restoration of logged areas in forest centers. From 1967 to 2.00, only 6.86 percents of logged areas were converted to shrubs, meadows or crop-lands, and the rest were converted into artificial forests or secondary forests. So the ecological shelter functions will be restored, stage by stage. Firewood collection, charcoal production and overgrazing are the three major triggers for the extensive degradation of alpine oak forests, Sa-bina tibetica forests and meadows. The arid valley grasslands expanded too. The degradation of vegetation in the southern slopes impairs ecological shelter functions and affects livelihood of local residents, so it is essential to find effective measures for ecological restoration and recon-struction. Field investigations have found

关键词： land use/cover classification, upper Dadu river watershed, vegetation successions, GIS, rS.

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Monitoring Dynamic Change of Land Cover Based on SVM and Satellite Images in Hanoi,Vietnam

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Wuhan University Journal of Natural sciences 2010年第4期15卷 355-362页

作者： ZHAO Jinling1,2. LIU Chuang1, 3 1. institute of Geographic sciences and Natural resources research, {2., beijing 100101, china 2. Graduate University of {2., beijing 100049, china 3. College of resources science and Technology, beijing Normal University, beijing 100875, china institute of Geographic sciences and Natural resources research Chinese Academy of Sciences Beijing China Graduate University of chinese academy of sciences Beijing China College of resources science and Technology Beijing Normal University Beijing China

An integral method,combining support vector ma-chine (SVM) with remote-sensing analysis techniques,was ex-plored to monitor Hanoi’s dynamic change of land cover. The landsat thematic mapper (TM) image in 1993,the enhanced the-matic mapper plus (ETM+) image in 2.00,and the image with the charge-coupled device camera (CCD) on the {2.-Brazil earth resources satellite (CBErS) in 2.08 were used. Six land-cover types,including built-up areas,woodland,cropland,sand,water body and unused land,were identified. The detected results showed visually the rapid urban expansion as well as land-cover change of Hanoi from 1993 to 2.08. There were 12.637.54 hm2.cropland de-creased between 1993 and 2.00,and 8 2.7.6 hm2.cropland de-creased between 2.00 and 2.08. Compared with cropland,wood-land firstly decreased and then increased,and the other types did not change significantly. The results indicate that CBErS dataset has the application potential in world resources researches.

关键词： land cover the china-Brazil earth resources satellite (CBErS) support vector machine (SVM) change detection

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An improved method for evaluating the seasonal variability of total suspended sediment flux field in the Yellow and East china Seas

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International Journal of Sediment research 2011年第1期26卷 1-14页

The suspended sediment flux field in the Yellow and East china Seas(YECS) displays its seasonal variability.A new method is introduced in this paper to obtain the flux field via retrieval of ocean color remote {2. data,statistical analysis of historical suspended sediment concentration data,and numerical simulation of three-dimensional(3D) flow *** components of the sediment flux field include(i) surface suspended sediment concentration inverted from ocean color remote {2. data;(ii) vertical distribution of suspended sediment concentration obtained by statistical analysis of historical observation data;and(iii) 3D flow field modeled by a numerical *** the improved method,the 3D suspended sediment flux field in the YECS has been *** comparison with the suspended sediment flux field solely based on the numerical simulation of a suspended sediment transport model,the suspended sediment flux field obtained by the improved method is found to be more *** 3D suspended sediment flux field from ocean colour remote {2. and in situ observation are more closer to the ***,by quantitatively analyzing the newly obtained suspended sediment flux field,the quantity of sediment erosion and deposition within the different regions can be *** sediment exchange between the Yellow Sea and the East china Sea can be *** mechanism of suspended sediment transport in the YECS can be better *** particular,it is suggested that the long-term transport of suspended sediment is controlled mainly by the circulation pattern,especially the current in winter.

关键词： Suspended sediment flux field Seasonal variability Yellow and East china Seas regression equation Numerical simulation

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