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1.
Thereislittledoubtthatabeliefinspiritualpowerswhichaffectourliveshasbeencommontoallhumangroupsovermanythousandsofyearsandpossiblyasmanhasexisted.Thisisperhapsanaturalcharacteristicconnectedwithman’scuriosityandneedforexplanatons,aswellastheinsecurity…  相似文献   

2.
IntroductionFibrebundletensiletesterswereoriginallydevelopedandstandardisedforcottonfibres[1,2 ] .Thepurposewastogivearapidmeasurementofmeanfibrestrengthwhichavoidstheneces sityofmeasuringalargenumberofsinglefibres.Thefibrebundletesterwaslaterusedforwoolf…  相似文献   

3.
And the Devils     
BothChristiansandChinesecommonpeoplehatedevils,buttheydealwiththemindifferentways.IntheChristianwayofthedevilsaresometimesinsideaperson’smind,soheneedn’tbeafraidofthem.WhenanhonestChristianfeelsthestirringofimproperdesiresheattributesthistotheDevils’…  相似文献   

4.
IntroductionCase Based ReasoningCase based Reasoning (CBR)isa processof“rememberand adapt”or“memberand compare”[1] .Casesare usedtohelpin understandingand assessingsituationsandtohelpinsolving problems. CBRistoretrievethe“mostsimilar”caseorsetofcases,itscyc…  相似文献   

5.
Transfusionbloodorbloodcomponentswithwhitecellsoftencausessideeffectsuchasfebriletransfusionreactionsandalloim munization ,evenindangeroflife[1,2 ] Inaddition ,somevirusrelatedtotransfusionresultsinitscontaminationbecauseoftrans fusingwhitecellsintobody[3~ 5…  相似文献   

6.
IntroductionInthestudyofanelectricalnetworkorapowersystem,theconceptofenergyfunctionisveryusefulindeducingthetransientstabilityofthesystem.BasedondissipativetheoryandnonlinearH∞approach,thispaperdiscussestwospecialsupplyrates,whichcorrespondtopassivi…  相似文献   

7.
Buoy Relay Method for Instantaneous Fluid Flow with Free Surface   总被引:1,自引:0,他引:1  
IntroductionFreeboundariesaresurfacesonwhichdiscontinuitiesexistinoneormorevariables.Examplesarefreesurfaces(bubblesordroplets),materialinterfacesorinterfacesbetweenfluidsandflexiblestructures.Threetypesofproblemsariseinthenumericaltreatmentoffreebound…  相似文献   

8.
IntroductionThemethodologyofmulticlassifiercombinationattractsextensiveattentionfromresearchersinthefieldofpatternrecognition.Mostresearchesfocusonhowtoselectthebestresultfromthosegivenbyseveraldifferentclassifiersforthepurposeofthebestrecognitionra…  相似文献   

9.
IntroductionNonlinearobserversarenecessaryfornonlinearcontrolsystemswhentherearenotenoughsensorstomeasureallthestatesoritisdifficulttomeasuresomeofthestatesbysensors.Sinceitsintroduction[1],nonlinearobservershaveattractedtheattentionofmanyresearchers…  相似文献   

10.
Triple-layer Absorptive Structures for Shock Wave Blast Protection   总被引:5,自引:0,他引:5  
Thesurvivabilityofamissilesiloagainstablastwaveconstitutesacriticalissuefornationaldefense.Atriplelayerstructureisdesignedtostrengthentheprevioussinglelayerdesign.AsshowninFig1,thebottomlayerisacircularplatemadeofreinforcedconcrete(RC).Tworingsofsimples…  相似文献   

11.
Packingsandpackedcolumnsarewidelyusedinmanyprocessesinchemicalindustryandenvironmentaltechnology .Incontrasttoplasticandceramicmaterials ,stainlesssteelpackingsownadvantagesfortheirelasticityandfirmness.However,theirmasstransferperformancehasrecentlybee…  相似文献   

12.
0 IntroductionTheneedforintegrationofdifferentdatabasemanagementsystems (DBMSs) ,makingdifferencesbetweenthesesystemsinvisibleandprovidinguserswithauniformaccesstoallthedatabaseshasgrownrapidlyduringthelastdecade .However,databaseautonomyandheterogeneity…  相似文献   

13.
Thedioxotetraamineligandspossessthestructuressimilartothoseoftheoligopeptides .Theyareabletoformstablecomplexeswithtransitionmetalions .Theirtwoamidemoietieslosehydrogenionsduringcoordinationwithdivalentmetalions,thereforetheyareabletosta bilizehighoxid…  相似文献   

14.
IntroductionAir/hydroconvertersystemsarewidelyappliedinindustry,buttherearesomeproblems.Themostseriousproblemisbubblegeneration.ThebubbleformationmechanismisinvestigatedinRef.[1].Theaimofthisprojectistostudythebubblecontent.Thestudiesprovidefurtherinsight…  相似文献   

15.
IntroductionThedesireforanoptimaldiscretizationschemeremainsoneofthecriticalissuesincomputationalfluiddynamicsandnumericalheattransfer[1,2].Anoptimalschemepossessesaccuracy,stability:boundedness(nounphysicaloscillations)andalgorithmicsimplicity.Themaincon…  相似文献   

16.
IntroductionWhenthehomogeneoussolutionbecomesthermodynamicallyunstable (e g ,bytheintroductionofanonsolvent) ,thesolutionseparatesintotwoliquidphasesofdifferentcompositiontolowerthefreeenergyofthemixture Thisprocessisresponsibleforthegenerationoftheporou…  相似文献   

17.
Theabrasionresistanceofyarnsisveryimportantforthedownstreamprocessingandend use ;manyresearchworkscon cernedaboutthisaspecthavebeendone[1~ 17] .Although ,becauseofthedifferenceinstructuresandproperties ,thebehavioroftheabrasionresistanceofdifferentyarnsisdif…  相似文献   

18.
0 IntroductionAsthethirdlargestriverintheworldandthelargestriverinChina ,theYangtzeRiverissoimportanttohumansocietyinChinathatitisamirrorofChinesehistory .Sinceancienttimes,peopleinitsbasinshavebeensufferingfromandfightingagainstflooddisastersfromgenera…  相似文献   

19.
IntroductionNumericalsimulationofrotorstatorinteractionshasreceivedwidespreadattentioninthelastfewyearsbecauseoftheincreasinginterestinunderstandingtheunsteadynatureofflowsinturbomachinery.Therealflowsinsideaturbineoracompressorareunsteadyandarechara…  相似文献   

20.
Shape Memory Polymers and Their Applications to Smart Textile Products   总被引:3,自引:0,他引:3  
IntroductionSmartproductswillbethefutureforhighlydevelopedsoci eties.Amongdifferenttypesofsmartmaterials,shapememorygroupsincludingshape memoryalloys,shape memoryceramicsandshape memorypolymershavereceivedsomeattention ,hadvariousapplicationsandstillhave…  相似文献   

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