Mapping badland areas using LANDSAT TMETM satellite imagery and morphological dataWord格式文档下载.docx
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Tele-maintenance“intelligent”systemfortechnicalplantsresultmanagement
ReliabilityEngineering&
SystemSafety,Volume94,Issue1,January2009,Pages63-77
MassimoConcetti,RobertoCuccioletta,LorenzoFedele,GiampieroMercuri
$41.95
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TheGHIBLIplasmawindtunnel:
DescriptionofthenewCIRA-PWTfacility
ActaAstronautica,Volume61,Issues1-6,June-August2007,Pages331-340
CarloPurpura,FedericoDeFilippis,EgidioGraps,EduardoTrifoni,RaffaeleSavino
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AbstractAbstract|Figures/TablesFigures/Tables|ReferencesReferences
Abstract
AnewplasmawindtunnelisunderconstructionattheItalianAerospaceResearchCentre(CIRA)locatedatCapua.ItisnamedGHIBLIandtheplasmaisgeneratedbyasegmentedarcheaterwhosepowerisabout2
MW.Suchanewfacilitywillbeabletoperformtestcampaignsonmodelsupto80
mmindiameter,andmaybeusedtodevelopresearchesintheaerospacefieldofthehypersonicplasmaflowsfromthereentrytechnologiestothevalidationofCFDcodesforthetheoreticalpredictionsofaerothermodynamicphenomena.TargetofthepresentpaperisthepresentationofresultsobtainedbymeansofCFDsimulationbyusingthewell-knownFLUENTcode,Suchacodehasbeenusedtosimulatetheaerothermodynamicfieldinsidetheconicalnozzleofthefacilitytoobtainsomeanalyticalcorrelations(fits)betweenthemainaerodynamicparametersatthenozzleexit,suchastheMachnumber,flowdensity,massflowrate,etc.andthereservoirconditionsinsidethearcheatercolumn,totalpressureandtotalenthalpy.Suchfitsallowfasttheoreticalpredictionofthefacilityoperationparametersforgivenreservoirconditions.
ArticleOutline
1.Introduction
2.Facilitydescription
3.Facilityoperatingconditions
4.CFDanalysis
5.Results
6.Conclusions
References
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Recentadvancesonsurfacegrounddeformationmeasurementbymeansofrepeatedspace-borneSARobservations
JournalofGeodynamics,Volume49,Issues3-4,April2010,Pages161-170
C.Prati,A.Ferretti,D.Perissin
Space-borneSyntheticApertureRadarinterferometry(INSAR)isawellknownwidelyusedremotesensingtechniquetogetprecise(sub-centimetric)surfacedeformationmeasurementsonlargeareas(thousandsofkm2)andhighspatialdensityofmeasurementpoints(hundredsperkm2).Inthisworktherecenttechnologicaladvancesofthistechniquearepresented.First,ashortreviewoftheINSARbasicsisdedicatedtoreaderswhoarenotINSARspecialists.Then,ananalysisoftheimprovementofgroundmotionmeasurementofferedbymultiplerepeatedspace-borneSARobservationsgatheredbythenewgenerationofhighresolutionSARsystemsisgiven.AnexampleobtainedwiththerecentGermanTERRASAR-XsystemisshownandcomparedwiththemeasurementsobtainedwiththeelderC-bandRADARSAT-1system.Finally,apossibleprocessingofmulti-temporalanalysisofSARimagesthatallowextractinggroundmotioninformationalsofrompartiallycoherenttargetsisgiven.InthiscasethecoreideaistorelaxtherestrictiveconditionsimposedbythePermanentScattererstechnique.Theresultsobtainedindifferenttest-sitesshowanincreasedspatialdensityofarealdeformationtrendmeasurements,especiallyinextra-urbanareasatthecostofmissingmotionswithstrongvelocityvariation.
2.INSARandDINSAR(differentialSARinterferometry)
2.1.MovingfromINSARtoPS
2.2.PSdataprecision
2.3.Theeffectofresolutionimprovement
3.Frompointtoarealmotionmeasurements
3.1.Multi-masterinterferogramsandtargetslife-time
4.Conclusions
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PermanentScatterersforlandslideinvestigations:
outcomesfromtheESA-SLAMproject
EngineeringGeology,Volume88,Issues3-4,15December2006,Pages200-217
PaoloFarina,DavideColombo,AlfioFumagalli,FlorianMarks,SandroMoretti
WithintheSLAMproject(ServiceforLandslideMonitoring),launchedin2003bytheEuropeanSpaceAgency(ESA)thePermanentScatterers(PS)technique,amulti-imageinterferometricapproach,coupledwiththeinterpretationofaerial-photosandopticalsatelliteimages,wascarriedoutforlandslideinvestigations.ThePSanalysiswasappliedataregionalscaleassupportforlandslideinventorymappingandatlocalscaleforthemonitoringofsinglewell-knownslopemovements.FortheintegrationofthePSmeasurementswithinalandslideinventorytheArnoriverbasin(Italy)waschosenastestsiteforthepresenceofahighnumberofmassmovements(todateabout300areasathighlandslideriskandmorethan27,000individuallandslidesmappedbytheinstitutionalauthorities).About350SARimageshavebeeninterferometricallyprocessedbymeansofthePStechnique,withthedetectionofabout600,000PS.Theuseofopticalimagescontributedspatialmeaningtothepoint-wiseinformationprovidedbythePS,makingiteasiertoidentifyterrainfeaturesrelatedtoslopeinstabilityandthelandslideboundaries.Herewedescribetheemployedmethodologyanditsimpactintheupdatingofapreexistinglandslideinventory.6.8%ofthetotalnumberoflandslideswerecharacterizedbygrounddisplacementmeasurementsfromthePS:
6.1%ofalreadymappedlandslidesand0.8%ofnewunstableareasdetectedthroughthePSanalysis.Moreover,mostofthePSarelocatedinurbanareas,showingthattheproposedmethodologyissuitableforlandslidemappinginareaswithaquitehighdensityofurbanization,butthatovervegetatedareasitstillsuffersfromthelimitationsinducedbythecurrentspace-borneSARmissions(e.g.temporalde-correlation).Ontheotherhand,theuseofInSARforthemonitoringofsingleslowlandslidesthreateningbuilt-upareashasprovidedsatisfactoryresults,allowingthemeasurementofsuperficialdeformationswithhighaccuracyonthelandslidesectorscharacterizedbyagoodradarreflectivityandcoherence.
2.Studyarea
3.Datasetsandmethods
3.1.SARdatasetandinterferometricprocessing
3.2.Opticaldatasetandancillarydata
4.IntegratinglandslideinventoryandInSARdata
4.1.ApplicationofthemethodtotheArnodrainagebasin
5.Landslidedisplacementmonitoring
5.1.TheCarboniletestarea
Acknowledgements
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StudiesandapplicationsofnucleartracksinsolidsinbasicscienceandtechnologyinPakistan
RadiationMeasurements,Volume43,Supplement1,August2008,PagesS571-S577
H.A.Khan,I.E.Qureshi,E.U.Khan
AbstractAbstract|ReferencesReferences
Thesolidstatenucleartrackdetection(SSNTD)techniqueisnowawell-establishedtoolforthedetectionofchargedparticleswithstoppingpowergreaterthanacertainthresholdvalue.Beingapassivedetectionsystem,itexistedintheformofprimordialcrystalsandhencequalifiedtoberegardedasthe‘oldest’memberofthenucleardetectionsystems.Sincetheadventofitslaboratoryusein1958,thetechniquewasadoptedbydifferentlaboratoriesatdifferenttimesallovertheworld.PakistanisoneofthecountriesthatestablishedanSSNTD-laboratoryintheearliestdevelopmentalstageofthetechnique.Consequently,significantcontributionsweremadebyasmallbutenergeticgroupofscientiststowardthemethodologyofthetechniqueaswellasitsapplicationsindiverseareassuchasnuclearphysics,cosmology,materialscience,geology,geophysics,bio-medicalphysicsandenvironmentalscience.InthisarticlewewillattempttopresentabriefsummaryoftheimportantadvancesmadeinthedevelopmentofthistechniqueanditsinnovativeapplicationsbyPakistaniresearchersinvariousfieldsofscienceandtechnology.
Aselsewhereintheworld,thetechniqueisnotubiquitousinallnuclearresearchlaboratoriesinPakistanbecauseofthewell-knownlimitationsofthedetectionsystem.However,thenumberofworkersinvolvedinresearchstudieshasbeengrowingovertheyears.Theseincludedboththefreshresearchersaswellasthosewhoshiftedfromotherresearchinterests.ThishasresultedinahealthyreinforcementofthemanpowerengagedinSSNTD-basedresearchwork.Afteraselectivepresentationoftheon-goinginvestigationsbasedontheuseofSSNTDsinPakistan,somecommentsaremadeforthepossiblefuturedirectionsofprogress.
ToputthePakistaniexperienceininternationalperspective,itisemphasizedthattheuniquefeaturesofSSNTDsarefacingseriouschallengesfromrapidadvancesinhighprecisionelectron