简介:Thispaperproposesanewmethodbasedonprincipalcomponentanalysistofindthedirectionofanobjectinanypose.Experimentsshowthatthismethodisfast,canbeappliedtoobjectswithanypixeldistributionandkeeptheoriginalpropertiesofobjectsinvariant.ItisanewapplicationofPCAinimageanalysis.
简介:ANALYSISOFSTRONGSINGULARITIESFORNONLINEARHYPERBOLICEQUATIONSFANGDAOYUANAbstract.Inthispaperwereviewoursomeresultsaboutthestr...
简介:ARoseforEmilyisanexcellentshortstorybyAmericanauthorWilliamFaulknerinthe20thcentury.ItisaboutthetragicfateofthearistocraticladyEmily.ThispaperanalysesthereasonsofEmily’stragedy,herawakeningandthefailureofherrevoltfromafeminismperspective.
简介:Insteady,solid-liquidtwo-phaseturbulentflows,thereexisttwotypicalpatternsoftheverticaldistributionofparticleconcentration.ThepatternIshowsamaximumconcentrationatanelevationabovethebed.ThepatternIIshowsanincreaseoftheparticleconcentrationdownwardoverthewholevertical,withthemaximumatthebed.MostofthetheoriesonparticleconcentrationdistributionhavebeendonewiththepatternII,anditislackofasuccessfultheorycovetingbothofthetwopatterns.Thispaperreviewstheparticledistributiontheories,includingthediffusiontheory,themixturetheory,theenergytheory,thesimilaritytheory,thestochastictheoryandthekinetictheory.Thekinetictheoryisalsoappliedtodescribetheverticaldistributionofparticleconcentrationinbothdiluteanddenseflows.
简介:Aprocessfornumericalanalysisofradialcirculationdistributionofpropellerbladeisproposedandpresented.Itisbasedontheresultsofnumericalsimulationofthevelocityfieldaroundpropellerbladesandinthewake.Thewell-knowntraditionalmethodusingtangentialvelocitydatainthewakeandapplyingStockes'stheoremwasalsoexaminedintheinvestigation.Theresultsfromtwoapproachesarecomparedwitheachother.Itisfoundthatifthetraditionalwayisutilized,inmanycasesanunexpected'hump'appearsinthecirculationdistributionatcertainouterradius.Theauthorscalculatedthecirculationsdirectlyaroundbladesections,anditisreferredasdirectmethod.Theunexpectedhumpofthecirculationdistributiondisappearsintheresultsofdirectmethod.Thisarticlealsodiscussesthereasonsoftheappearanceoftheunexpectedhumpintraditionalapproach.Thedirectmethodisproposedtohaveapotentialinanalyzingorverifyingtheradialroaddistributionfordesignedpropellerandthenumericalanalysisinsteadofexperimentalvalidationforcirculationdistributioncanbeasatoolinthepropellerdesignprocess.
简介:"Energyindependence"hasbeenanage-olddreamoftheU.S.administration,andrecentlyreemergedasahottopicintheUnitedStates.ThecurrentdeclineofU.S.dependenceonforeignenergyismainlycausedbyitseconomicdownturnratherthangenuineenergyindependence.ActuallytheU.S.stillneedstoimportlargequantitiesofcrudeoilinaratherlongtime.
简介:Thispaperpresentsanovelmethodforoverlappingortouchingblobobject(particles)segmentation.Itisbasedonthewatershedtransformation,oneofthemostpowerfulimageanalysistoolsprovidedbymathematicalmorphology,Inthismethod.wefirstbuildthedistancefunictionoftheblobimage,andthenextracttheregionalminimaasmarkers,andfinallythewatershedtransformationisperformed.Theapplicationsofthisalgorithmillustratedusingexamplesofredbloodcellsegmentationandbrokenmedicinepilldetection.
简介:Epidemicsofsexuallytransmitteddiseaseshavebecomeworldwideseriousproblems.TheInstituteofDermatologyandVeneologyofWenshanAutonomousPrefectureinYunnanisacenterofpolitical,economical,culturalandsocialactivitiesintheprefecture.ItisalsothelocationoftheCommitteeofWenshananditsgovernment.WenshandataindicatesthatSTDshavebeenspreadingfromtownsofthisprefecturetothecountryside.
简介:ChineseREindustryentersintoakeyperiodafterexperiencingsomebigevents.Thetax-rebateofREexportproductswascancelledonMay1st2005,followedbypricesoaringofBaotoumixedREcarbonates.SomeofthefamousREenterprisesinBaotouhadtostopproductiontodealwithenvironmentalpollutionproblems.Fromabovesituationofrareearthindustry,wecouldanalyzedevelopingtrendsofrareearthmarket.First,productioncostofrareearthseparatedproductsandrareearthmetalswillrisesha...
简介:WepresentthenumericalanalysisofacoupledmethodforthenumericalsimulationoftransientviscoelasticflowobeyingadifferentialconstitutiveequationwithaNewtonianviscosity.TheschemeusedisbasedonEulerimplicitmethodintimeandmaintainsateachtimestepacoupleofthevelocityuandtheviscoelasticpartofthestressσ.Approximationinspaceismadebyfiniteelementmethod.Theapproximatestress,velocityandpressureare,respectively,P1-continuous,p2-continuous,andp1continuous.Upwindingneededforconvectionofσismadebya'StreamlineUpwindPetrovGalerkin'method(SUPG).
简介:WepartitiontheobservedwindfieldintorotationalanddivergentwindfieldstoanalyzethestreamfieldofTy-phoonPolly(No.9216),whichlandedon31August1992andcausedsevereweatherandlargedamageintheeasternChina.Theresultsindicatethatthepreservationoftyphoonintensityafterlandingandtheheavyrainfalltookplaceonthenorthernperipheryoftyphoonareduetothestrongdivergentwindsontheregionsoflowleveljet(LLJ)andhighleveljet(HLJ)aroundthetyphoon.ThedirectionofdivergentwindsintheLLJisperpendiculartotheobservedwind.But,thedirectionofdivergentwindsaroundtheHLJaxisisparalleltotheobservedwinds.Thestreamfunctionandtherotationalwindcorrespondingtothehorizontalvorticitydisplaytheverticalcirculationassociatedwiththeheavyrain,whichisstrongerthantheverticalcirculationaroundthetyphooncenter.Thethree-dimensionaltrajectoriesexhibitthewarmandmoistairparcelsofLLJtravelingnorthwardintotheheavyrainfallregionandascending,thenturningeastwardintheHLJ.
简介:Thediaphragmofsteamturbineisoneofthemainpartsofthepassageunitforairflowing.Forstudyingitsworkingconditionandperformance,thethree-dimensionalfiniteelementmodel(FEM)withthesoftwareANSYS10.0isestablishedaccordingtotheactualworkingparameters.Withthemodel,thedeformationresultsandstressfieldresultsareanalyzedandthemaximumdisplacementandstressvaluearecalculated,meanwhile,theircorrespondingpositionsarefound.Itprovidesagoodfoundationforsolvingtheprobleminproduction.
简介:Thirdpartylitigationfunding(TPLF)isoneofthemostinnovativetrendsinlitigationfundingindustry.InaTPLFcontract,anexternalinvestor(thethirdpartyfunder)financiallysupportsalitiganttocoverlitigationexpenses.Iftheclaimisfinallysuccessful,ashareofrecoverieswillcometothefunderinreturn.Ontheotherhand,thethirdpartyfunderwillreceivenocompensationiftheplaintifflosesthesuit.Uptillnow,insomecommonlawjurisdictions(e.g.,Australia,theUK,andtheU.S.),TPLFhasbeenlegallyacceptedanddevelopsrapidly.Meanwhile,concernsabouttheuseofTPLFhavealsobeenraised.Forexample,whetherTPLFwillencouragefrivoloussuitsandunmeritoriousclaims;andwhethertheuseofTPLFwillbesociallydesirable.Inthisarticle,abasiceconomicmodelofTPLFwillbebuiltfirstly.Then,analysisbasedonthismodelwillbedeliveredandfurthersocialexternalitiesbroughtbytheuseofTPLFwillalsobeinvestigated.Finally,throughaneconomicanalysis,itisconcludedthatTPLFisgenerallysocialdesirablebutregulationsshouldbeimposed.
简介:Inthispaper,weformulateandexplorethecharacteristicsofiterativelearninginballisticcontrolproblems.Theiterativelearningcontrol(ILC)theoryprovidesasuitableframeworkforderivationsandanalysisofballisticcontrolunderlearningprocess.Toovercometheobstaclescausedbyuncertaingradientandredundantcontrolinput,weincorporateextratrialsintoiterativelearning.Withthehelpoftrialresults,propercontrolandupdatingdirectioncanbedetermined.Then,iterativelearningcanbeappliedtoballisticcontrolproblem.Severalinitialstatelearningalgorithmsarestudiedforinitialspeedcontrol,forcecontrol,aswellascombinedspeedandanglecontrol.Intheend,shootinganglelearninginthebasketballshotprocessissimulatedtoverifytheeffectivenessofiterativelearningmethodsinballisticcontrolproblems.