简介:Inthispaper,aneweffectivemethodisproposedtofindclassassociationrules(CAR),togetusefulclassassociationrules(UCAR)byremovingthespuriousclassassociationrules(SCAR),andtogenerateexceptionclassassociationrules(ECAR)foreachUCAR.CARmining,whichintegratesthetechniquesofclassificationandassociation,isofgreatinterestrecently.However,ithastwodrawbacks:oneisthatalargepartofCARsarespuriousandmaybemisleadingtousers;theotheristhatsomeimportantECARsaredifficulttofindusingtraditionaldataminingtechniques.Themethodintroducedinthispaperaimstogetovertheseflaws.Accordingtoourapproach,ausercanretrievecorrectinformationfromUCARsandknowtheinfluencefromdifferentconditionsbycheckingcorrespondingECARs.Experimentalresultsdemonstratetheeffectivenessofourproposedapproach.
简介:TheChinesegovernmentpaysspecialattentiontopromotingandensuringhumanrightsaccordingtolaw.In2001,theNPCstandingcommitteereviewed30bills,revisedthetrademarklaw,thecopyrightlaw,themarriagelawandthetradeunionlawandadoptedAmendmentⅢtothecriminallawinthelightofterroristactivities.Thejudgelawandtheprocuratoratorlawhavechangedthesystemfortheappointmentofjudgesandprocuratorsandforacquiringthequalificationsoflawyers.Therevisedlawsprovideforaunified
简介:Nikuradseroughness(ks)isveryimportantinthesedimenttransportpredictionbecauseitisrelatedtotheevaluationsofthevelocitydistribution,shearstressanderosiondepth.DimensionlessNikuradseroughness(ks/D,whereDisthesedimentdiameter)isusuallygiven1–2.5ontheimmobileplanbedoratlowshearstress.ButitbehavesdifferentlyonthemobileplanbedathighshearstresswithmuchsedimentpickeduptomovementwhentheShieldsparameter(Θ)islargerthan0.8–1.0.TheeffectiveNikuradseroughnessonthemobileplanbedwasderivedindirectlyfromtheerosiondepthcorrelatedtothemobileplanbedthicknessconsideringthemassconservationinthepresentstudy.TheproposederosiondepthconfirmedtherelationtotheShieldsparameterswithanextrafactorconsistingofsuspendedsedimentanditsdampingtoturbulence.Thedecrementoftheerosiondepthcausedbytheincrementofthesedimentdiameteratlargeshearstresswasobtained,whichwasusuallyabsentinclassicalempiricalformulasbasedonthebedloadtheory.GoodagreementwithexperimentswasachievedbythepresentpredictionoftheNikuradseroughness,erosiondepthandsedimenttransportrate.Discussionwasmainlyfocusedonthepredictionimprovementcausedbyconsideringtheimpactofsuspendedsedimentanditsdampingtoturbulence.
简介:Farmers'ForestProductionAssociationsAreEffectiveinProtectingForests¥byZengJianxinFarmersarethemainforceinsocialforestryprogra...
简介:Submergedvegetationhasasignificantimpactonwaterflowvelocity.Currentinvestigationsincludetheimpactthroughaddingdragresistanceandincreasingbottomroughnesscoefficient,whichcannotelucidatethecharactersofrealsubmergedvegetation.Toevaluatetheeffectsofsubmergedvegetationonwatercurrentsatdifferentvelocities,alaboratoryexperimentwasconductedusingthreekindsofvegetations.Theeffectiveheightsofthesevegetationsonvaryingflowvelocitieswereevaluated.AnequationdescribingtherelationshipbetweenthenormalizedresistanceofthesubmergedplantsandtheReynoldsnumberbasedontheplanteffectiveheightwasthenestablishedandusedtocalculatethehydraulicresistanceparametersofsubmergedplantsindifferentstagesofgrowth.
简介:U.S.sanctionsonIranhaveexpandedsincethestartoftheIraniannuclearissue.Theyhavegrownfromsmall-scaleembargoestotoday’ssanctionsonmultiplesectorsincludingfinance,trade,energy,andpersonnel.DuringU.S.PresidentBarackObama’stenure,thereisverylittlelikelihoodthattheU.S.willresorttoforce,leavingWashingtonwithnoothermeansthansanctionstopersuadeIrantochangeitsnuclearpolicy.Thismeansthatalthoughsanctionshavealimitedeffect,theU.S.willcontinuetoprimarilyrelyonthemtoforceIran’shand.
简介:background study1.the current situation about listening teaching in C.M.S.C.2.the analysis of the reasons for students’ poor listening ability(1) about the teaching aspecta.without listening test b.the textbook limitc.the teachers’ limited knowledge of English teaching methoddogy ,the natures of listening1.what is listening.2.why is listening important in senior students’ English learning.3.what are the factors influencing the listening comprehension in C.M.S.C.III part three,evaluation1.the feasibility(1)having special time for completing listening activities (2)using a good-quality recorder in class(3)having sufficient materials to be selected for listening practice(4)the students’ necessary knowledge of the world2.the application of listening activities in classroom.3.the anticipated problems in implementing listening activitiesV part five
简介:WederivedrevisedeffectivediffusionenergybarriersfollowingtheBoltzmanndistributionassumptionforimpurityatomsinabulkmaterialundertheimpactofvariouskindsofpointdefectstorevealtheinsightsofmigrationmechanisms.Theeffectivediffusionenergybarriersofcopperimpuritiesinbulkzirconiumwerecalculatedthroughthefirstprinciplemethodunderthepresentedhypothesis.Ourresults(?E||=1.27eV,?E⊥=1.31eV)agreedwellwiththeexperimentalresults(?E||=1.54eV,?E⊥=1.60eV),whichvalidatedbulkdiffusionasthemajormechanismforcopperdiffusioninzirconium.Theeffectivediffusionenergybarrierscouldbeusedforestimatingwhetherthedefectswillacceleratethediffusionorslowthemdownbyactingastrapsoftheimpurityatoms.Ontheotherhand,thefirstprincipleresultsoftheimpuritydiffusionviadefectscouldbefurtherusedasinputsoflargerscalecomputationalsimulations,suchasMC(MonteCarlo)orPhaseFieldcalculations.
简介:IntermittentPneumaticCompression(IPC)hasbeenusedsuccessfullyforthepreventionofearlypostoperativedeepveinthrombosis(DVT).RecentlyIPChasbeendescribedforthetreatmentoflymphedema,chronicedema,recoveryfromlowerextremityulcersandtheenhancementofwoundhealing.ForgoodapplicationsofIPCinclinic,itisnecessarytostudyitseffectivemechanismfurther.Wemeasuredsome
简介:乐队结构和混乱黄铜矿的有效质量光电的材料Cu1xAgxGaX2(X=S,Se)被密度调查功能的理论。特殊quasirandom结构被用来在Cu/Ag地点模仿本地原子混乱。加修正方法的本地密度被采用为所有混合物获得正确半导体乐队差距。bandgap异例能为硫化物和硒化物被看见,在Ag混合物的差距价值比Cu混合物的那些大的地方。乐队差距能为Cu1xAgxGaSe2,并且从为Cu1xAgx煤气的2。乐队差距最小和最大值发生在在x=附近0.5并且x=1,分别地为硫化物和硒化物。以便显示出Cu1xAgx有效的团作为混乱Ag集中的功能被显示出的GaX2,。最后,详细说明了结构被给看澄清基本间接差距的转变需要的声子动量的乐队。这些结果应该在设计高效率的光电的设备是有用的,与更好的吸收和高活动性,由在CuGaX2的做Ag。
简介:Optimizationofcompositionandmicrostructureisimportanttoenhanceperformanceofsolidoxidefuelcells(SOFC)andlithium-ionbatteries(LIB).Forthis,theporouselectrodestructuresofbothSOFCandLIBaremodeledasabinarymixtureofelectronicandionicconductingparticlestoestimateefectivetransportproperties.Particlepackingsof10000spherical,binarysizedandrandomlypositionedparticlesarecreatednumericallyanddensifiedconsideringthediferentmanufacturingprocessesinSOFCandLIB:thesinteringofSOFCelectrodesisapproximatedgeometrically,whereasthecalenderingprocessandvolumechangeduetointercalationinLIBaremodeledphysicallybyadiscreteelementapproach.Acombinationofatrackingalgorithmandaresistornetworkapproachisdevelopedtopredicttheconnectivityandefectiveconductivityforthevariousdensifiedstructures.ForSOFC,asystematicstudyoftheinfluenceofmorphologyonconnectivityandconductivityisperformedonalargenumberofassemblieswithdiferentcompositionsandparticlesizeratiosbetween1and10.Incomparisontopercolationtheory,anenlargedpercolationareaisfound,especiallyforlargesizeratios.Itisshownthatincontrasttoformerstudiesthepercolationthresholdcorrelatestovaryingcoordinationnumbers.Theefectiveconductivityshowsnotonlyanincreasewithvolumefractionasexpectedbutalsowithsizeratio.ForLIB,ageneralincreaseofconductivityduringtheintercalationprocesswasobservedincorrelationwithincreasingcontactforces.Thepositiveinfluenceofcalenderingonthepercolationthresholdandtheefectiveconductivityofcarbonblackisshown.Theanisotropycausedbythecalenderingprocessdoesnotinfluencethecarbonblackphase.
简介:Toutilizingthecharacteristicofradarcrosssection(RCS)ofthelowdetectableaircraft,aspecialpathplanningalgorithmtoeludingradarsbythevariableRCSispresented.ThealgorithmfirstgivestheRCSchangingmodeloflowdetectableaircraft,thenestablishesathreatmodelofaground-basedairdefensesystemaccordingtotherelationsbetweenRCSandtheradarrangecoverage.Bythenewcostfunctionsoftheflightpath,whichconsiderbothfactorsofthesurvivalprobabilityandthedistanceoftotalroute,thispathplanningmethodissimulatedbasedontheDijkstraalgorithm,andtheplannedroutemeetstheflightcapacityconstraints.Simulationresultsshowthatusingtheeffectivepathplanningalgorithm,thelowdetectableaircraftcangivefullplaytoitsownadvantageofstealthtoachievethepurposeofsilentpenetration.
简介:Asinterpretationisanintentionalandinterpersonalinteraction,anidealresultcan’tbeeasilyachievedbetweenthesenderandthereceiverduetothechallengesposedbylanguagesandculturalbarriers.FromtheperspectiveofintentionandfunctioninSkopostheorie,typicalexamplesareanalyzedtoillustratehowtoachieveaneffectiveinterpretationbyconsideringthesender’sintentionandthereceiver’sacceptance.
简介:TheroleplayedbyDNAinmolecularbiologyisclearlyrecognizedtobevitaltolifeonthisplanet.8-oxo-7,8-dihydro-2deoxyguanosine(=8-OHdG),isprobablythemostimportantproductof"oxidativestress”inDNA.ItsconcentrationinDNAis,infact.aquantitativeanalysisofthedegreeofDNAdamagethatanorganismhasundergone.Duetotheimportanceof8-OHdGofnucleicacidginmutagenesis,carcinogenesisandaging,numerouschemicalandbiologicalinvestigationshavebeenmadeonthissubjectinthepasttime.Kuchinoandco-workershavefoundthat8-OHdGresidueinDNAismisreadingduringtheprocessofDNAreplication.Recently,somereportshavebeenpresentedonhigh8-OHdGlevelsinpatientssufferingfromvariousdiseasessuchaschronichepatitis,Fanconisanemia,diabetesmellitusandHelicobacterpyloriinfections.Asaresult,8-OHdGisausefulmarkerforthestudyofDNAdamagearisingfromreactiveoxygenspeciesandisofgreatsignificanceforcancerresearch.The8-OHdGlevelsinDNAcanhelpunderstandthemechanismofcarcinogensandleadtomoreeffectivetreatmentsformanydifferenttypesofcancer.Forthesereasons,ananalysisof8-OHdGwithquickness,lowcostandhighaccuracyisrequired.