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1.
1 ModelandBackgroundInmicrobebiochemicalreactionstherearecomplexmetabolismprocessesandusuallymanypopulations[1].Amongthesepopulationstheremaybearelationthatthemetabolateinthefirstprocessconstructthenutrimentofthesecondprocess.Nowweconsideronlytwoimporta…  相似文献   

2.
IntroductionTimeandspaceisabasicforminwhichthemattersexist.Allmattersandthingsintheworldoccur,exist,move ,developandvariateinthespacetime.Allprocessesinthematerialworldaretheprocessesofthemotion ,developmentandvariationofmatters.Tostudytheobjectsthatoccu…  相似文献   

3.
IntroductionLagrangianmechanicsisanimportantpartofanalyticalmechanics.ItisageneralizationofNewtonianmechanics.Newtonianmechanicsisestablishedontheconfigurationspace—Riemannianmanifold .Lagrangianmechanicsisestablishedonitstangentbundle ,Hamiltonianmecha…  相似文献   

4.
IntroductionAsexperimentalresearchshows[1]:Meanwhilebladepositivecurvingreducesthecrosswisepressuregradientintipclearance,resultinginthedecreaseoftherelativeleakagethroughtipclearance ,themixinglossgeneratedfromtheinteractionofthetipleakageandthecrosswi…  相似文献   

5.
IntroductionLikethecoplanarforcesystem ,anygeneralspaceforcesystemFi(i =1 ,2 ,… ,n)canbereducedtoapointOandreplacedbyaprincipalvectorRandaprincipalmomentL0 .Sothatthevector_typenecessaryandsufficientconditionsforequilibriumofthegivenforcesystemareR =0 , L0 =0 . (1 )…  相似文献   

6.
On the isometric isomorphism of probabilistic metric spaces   总被引:1,自引:0,他引:1  
IntroductionTherearetwokindsofisometricisomorphisminprobabilisticmetricspacetheory (see[1 -9] ) .ThefirstisthataPMspace (E ,F)isisometricallyisomorphictoanotherPMspace(E′,F′) ,andthesecondisthataPMspaces(E ,F)isisometricallyisomorphictoageneratingspaceofquasi_met…  相似文献   

7.
IntroductionThin_walledshellhasmanyappliancesinengineeringsuchasundergroundpipe,outershellofsubmarinewhichareusuallysubjectedtoexternalpressure .Whendesigningthosestructuresweshouldconsidernotonlythestrengthprobleminservice ,butalsothebucklingproblemun…  相似文献   

8.
IntroductionDuringthetimeofbedsurfacesedimenttransportation,sedimentparticlesofbedloadmakethecollectivemotionofvariousdifferentformsontheriverbedsurface,thustheformofbedsurfacechangesconstantly .Thiskindofcollectivemotionofsedimentparticlesonthebedsurf…  相似文献   

9.
IntroductionSolidliquidtwophaseflowliesextensivelyinmodernindustryandengineeringpractice.Thetechnologiesofcontrollingofsolidliquidtwophaseflowareusuallyverycriticalinmanyindustrialequipment,manufacturingprocessesanddesignsofengineering.Asanimportantth…  相似文献   

10.
IntroductionDuringthemid_1 980’s,atomographicimagingtechniquesuitedtoindustrialprocessdetection ,ProcessTomography[1],wasrapidlydevelopedintheUK ,USA ,etc .withsuccessfulapplicationsofCTtechniquetomedicaldiagnosis .Inparticular,asanewmemberwithinthefamilyofthe…  相似文献   

11.
IntroductionAsRef.[1 ]pointedout,inaturbinecascadewithtipclearance,mostofthesingularpointsandseparationlines,duetotheeffectoftheleakageflow ,arelocatedattheupperhalfspan(especiallyinitssuctionsurfacecorner) ,whichconsequentlyleadstoworsetheaerodynamiccharac…  相似文献   

12.
IntroductionThestochasticoptimalcontrolproblemsofreflecteddiffusionprocesseshasbeenconsideredbysomemathematicians,forinstance ,P .L .Lionsin [1 ] ,andJ.L .MenaldiandM .Robinin[2 ] .Inthispaper,wewillconsiderastochasticoptimalcontrolproblemofreflecteddiffusionswit…  相似文献   

13.
Thedifferentialquadraturemethod(DQM)proposedbyR.Bellman[1,2]hasbeensuccessfullyemployedinnumericalcomputationsofproblemsinengineeringandphysicalscience.BecausetheinformationonallgridpointsisusedtofitthederivativesatgridpointsintheDQM,itisenoughtoobta…  相似文献   

14.
Thethreshold_crossingofstochasticprocessesisaproblemoftenencounteredinthestudyofvariousphysicalphenomena .Theterm ,threshold_crossing ,isusedtoindicateacertainfixedvaluebeingcrossedbytheoscillatingrealizationζ(1) (t)ofastochasticprocessζ(t) ,asshownbythetypi…  相似文献   

15.
GENERALIZED H-KKM TYPE THEOREMS IN H-METRIC SPACES WITH APPLICATIONS   总被引:1,自引:0,他引:1  
IntroductionIn 1 996,Khamsi[1]establishedthehyperconvexversionofthefamousFan_KKMprincipleinhyperconvexspace .Yuan[2 ,3]obtainsomecharacterizationofKKMprincipleinhyperconvexspaces,andasapplicationsoftheirresults,somefixedpointtheoremsandmatchingtheoremsforopena…  相似文献   

16.
IntroductionManystudieshavebeendoneoncontractivemappings,e .g .,Rhoades[1]madeacomparisonofvariousdefinitions (morethan 1 0 0typesvariedfrom 2 5basictypes)ofcontractivemappingoncompletemetricspacein 1 977.Anduptonow ,suchstudyisstillgoingon ,e .g .,[2 ] .Inthispaper,these…  相似文献   

17.
Inrecentyears,applicationsofquaternionmatricesarebecomingmoreandmoreimportantandextensiveinrigidmechanics,quantummechanics,controltheoryandhelicaltechnology[1~3].Withtherapiddevelopmentoftheabovedisciplines,itisgettingmoreandmorenecessaryforustofurth…  相似文献   

18.
IntroductionSystemidentificationisakindofnewmethodforbuildingmathematicalmodel,themethodhasbeenwidelyappliedinengineering.Thebackgroundisindustrialprocessautomaticcontrol.Withoutanyknowledgeaboutacomplexindustryprocessinnermechanism,usingtheinputandout…  相似文献   

19.
IntroductionInrecentyears,fiber_reinforcedcompositelaminatedshellstructuresarewidelyusedintheaerospace ,marineindustry ,automobileindustryandotherengineeringapplications.Duringtheoperationallife ,thevarianceoftemperatureandmoisturereducestheelasticmoduli…  相似文献   

20.
IntroductionInthepaper[1],theauthorhasestablishedthescalarproductoftheunitvectoronitspowers,whichobtainedtheconvergentsumofLaurent’sseriesaboutaparticlemovingwithhighvelocitylessthanornearthatoflight.Underthissituationwemayexposecalculatingvariousparame…  相似文献   

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