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Analysis and assessment of bridge health monitoring mass data——progress in research/development of “Structural Health Monitoring”

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Science China(Technological Sciences) 2012年第8期55卷 2212-2224页

作者： LI AiQun DING YouLiang WANG Hao GUO Tong Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education Southeast UniversityNanjing 210096China

The "Structural Health Monitoring" is a project supported by National Natural Science Foundation for Distinguished Young Scholars of China(Grant No.50725828).To meet the urgent requirements of analysis and assessment of mass monitoring data of bridge environmental actions and structural responses,the monitoring of environmental actions and action effect modeling methods,dynamic performance monitoring and early warning methods,condition assessment and operation maintenance methods of key members are systematically studied in close combination with structural characteristics of long-span cable-stayed bridges and suspension *** paper reports the progress of the project as follows.(1) The environmental action modeling methods of long-span bridges are established based on monitoring data of temperature,sustained wind and *** action effect modeling methods are further developed in combination with the multi-scale baseline finite element modeling method for long-span bridges.(2) The identification methods of global dynamic characteristics and internal forces of cables and hangers for long-span cable-stayed bridges and suspension bridges are proposed using the vibration monitoring data,on the basis of which the condition monitoring and early warning methods of bridges are developed using the environmental-condition-normalization technique.(3) The analysis methods for fatigue loading effect of welded details of steel box girder,temperature and traffic loading effect of expansion joint are presented based on long-term monitoring data of strain and beam-end displacement,on the basis of which the service performance assessment and remaining life prediction methods are developed.

关键词： structural health monitoring bridge mass data condition assessment environmental action

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mass data—A Gold Mine to be Explored

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China's Foreign Trade 2015年第5期 32-33页

作者： Guo Yan

Click on a shopping website and looking for the products you are interested in,then you will place the order and wait for home *** you may talk with your families living far away on the video conference,or share your ... 详细信息

关键词： mass data A Gold Mine to be Explored data

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Exploiting big earth data from space - first experiences with the timescan processing chain

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Big Earth data 2018年第1期2卷 36-55页

作者： T.Esch S.Ureyen J.Zeidler A.Metz-Marconcini A.Hirner H.Asamer M.Tum M.Bottcher S.Kuchar V.Svaton M.Marconcini German Remote Sensing data Center(DFD) Earth Observation Center(EOC)German Aerospace Center(DLR)WeßlingGermany Brockmann Consult GmbH GeesthachtGermany IT4Innovations National Supercomputing Center VSB Technical University of OstravaPorubaCzech Republic

The European Sentinel missions and the latest generation of the United States Landsat satellites provide new opportunities for global environmental *** acquire imagery at spatial resolutions between 10 and 60 m in a temporal and spatial coverage that could before only be realized on the basis of lower resolution Earth observation data(>250 m).However,images gathered by these modern missions rapidly add up to data volume that can no longer be handled with standard work stations and software ***,this contribution introduces the TimeScan concept which combines pre-existing tools to an exemplary modular pipeline for the flexible and scalable processing of massive image data collections on a variety of(private or public)computing *** TimeScan framework covers solutions for data access to arbitrary mission archives(with different data provisioning policies)and data ingestion into a processing environment(EO2data module),mission specific pre-processing of multi-temporal data collections(data2TimeS module),and the generation of a final TimeScan baseline product(TimeS2Stats module)providing a spectrally and temporally harmonized representation of the observed ***,a TimeScan layer aggregates the information content of hundreds or thousands of single images available for the area and time period of interest(*** to hundreds of TBs or even PBs of data)into a higher level product with significantly reduced *** first test,the TimeScan pipeline has been used to process a global coverage of 452,799 multispectral Landsat–8 scenes acquired from 2013 to 2015,a global data-set of 25,550 Envisat ASAR radar images collected 2010–2012,and regional Sentinel–1 and Sentinel–2 collections of∼1500 images acquired from 2014 to *** resulting TimeScan products have already been successfully used in various studies related to the large-scale monitoring of environmental processes and their temporal dynamics.

关键词： Earth observation sentinel landsat mass data high performance processing information and communication technology automation

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