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1.
IntroductionInthestudyofanelectricalnetworkorapowersystem,theconceptofenergyfunctionisveryusefulindeducingthetransientstabilityofthesystem.BasedondissipativetheoryandnonlinearH∞approach,thispaperdiscussestwospecialsupplyrates,whichcorrespondtopassivi…  相似文献   

2.
IntroductionThemethodologyofmulticlassifiercombinationattractsextensiveattentionfromresearchersinthefieldofpatternrecognition.Mostresearchesfocusonhowtoselectthebestresultfromthosegivenbyseveraldifferentclassifiersforthepurposeofthebestrecognitionra…  相似文献   

3.
Thedioxotetraamineligandspossessthestructuressimilartothoseoftheoligopeptides .Theyareabletoformstablecomplexeswithtransitionmetalions .Theirtwoamidemoietieslosehydrogenionsduringcoordinationwithdivalentmetalions,thereforetheyareabletosta bilizehighoxid…  相似文献   

4.
Point-pattern Matching Using Irreducible Matrix and Relative Invariant   总被引:1,自引:0,他引:1  
IntroductionPointpatternmatchingisanimportanttopicinthefieldsofcomputervisionandpatternrecognition.Itsmaintaskistopairupthepointsintwoimagesofthesamescenewhenthereisageometrictransformationrelatingthetwoimages.Thetransformationmayberigidtransformati…  相似文献   

5.
IntroductionThemainmissionofpowerplantsimulatorsistoprovideinvaluabletrainingtoplantoperationalpersonnel.Todaythesimulatorshavebeenwidelyusedandtheirtrainingvalueshavebeenwellrecognized.Overthepastthreedecades,thesimulatorshavegonethroughseveralmajor…  相似文献   

6.
Chitosan Conduit for Peripheral Nerve Regeneration   总被引:2,自引:0,他引:2  
IntroductionTransectioninjuredperipheralnervehasalwaysbeendifficulttorepair .Clinicalmethodsincludeepineuriumsuturing (usedforslightlyinjurednerves)andautograft (usedforseverelylaceratednerves) .Unfortunately ,bothmethodshavedisadvantagessuchasnervedistort…  相似文献   

7.
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   

8.
IntroductionThehighTcsuperconductorsarelayeredmaterialswithCuO2 planes ,separatedbyinsulatingrock saltoxidelayers.TheimportanceoftheCuO2 planeshascreatedmajorinteresttostudytheelectronicandstructuralbehaviourofthesestructuralelementssincethediscoveryofth…  相似文献   

9.
Numerical Investigation of a High-speed Centrifugal Compressor Impeller   总被引:2,自引:0,他引:2  
IntroductionCentrifugalcompressorsareusedwidelyinindustryduetotheiradvantagesofsimplestructureandhighpressureratio.Theirefficiencyandstabilityareadverselyinfluencedbythepresenceofimpellerexitflownonuniformity.Inrecentyears,asaresultofimprovementsin…  相似文献   

10.
TheexpressionofheterologousproteinsinEscherichiacolihasbecomeastandardtech niqueinmolecularbiology .E .coliexpressionsystemshavetheadvantagesofproductioneco nomicsandlogistics .TheseadvantageshavemadeE .coliexpressionsystemapopularchoicefortheproductionof…  相似文献   

11.
IntroductionThephotosynthesislightreactionin plantsoccursinthethylakoidmembraneofthechloroplasts .Theproteincomplexesinthethylakoidmembranesaresupermolecularsystemsconsistingof proteins ,lipidsand pigmentswhichregulateandcontrolthelightenergyabsorption ,…  相似文献   

12.
IntroductionNonlinearobserversarenecessaryfornonlinearcontrolsystemswhentherearenotenoughsensorstomeasureallthestatesoritisdifficulttomeasuresomeofthestatesbysensors.Sinceitsintroduction[1],nonlinearobservershaveattractedtheattentionofmanyresearchers…  相似文献   

13.
Thelatticemismatchbetweenthesubstrateandtheovergrownlayerallowstheformationofself as sembledquantumdots (QDs)throughtheStranski Krastanovmechanism[1,2 ] .Thistechniquehasbeensuccessfullyappliedtovarioussemiconductorsystems,andinparticulartoGe/Siquantumdots(Q…  相似文献   

14.
IntroductionDenseplasmafocusdevices(DPF)[1]areusedtoproducepulsedplasmaswithhightemperatures(107K)anddensities(1019-1020cm-3)bymeansofextremelylargepulsedelectricaldischargeingases.AMathertypeDPFisshowninFig-1.Whenthesparkgapistriggered,thehighvoltag…  相似文献   

15.
IntroductionPhotosystemⅡ (PSⅡ )ofhigherplantsisamembraneproteincomplexlocatedinthethylakoidmembrane ,whichconsistsofmorethan 2 0proteins[1] .Itusessolarenergytocarryouttheprimary processesof photosynthesis :chargeseparation ,quinonereduction ,andwateroxidationt…  相似文献   

16.
IntroductionThelongitudinaltensilepropertyofunidirectionalcompositeplateismainlydeterminedbythefiber.Thestressstrainrelationislinearforawidestrainrange,butthestressstrainrelationintransversedirectionandinshearisgenerallynonlinear.HahnandTsai[1]inve…  相似文献   

17.
Antibacterial Effects of Silver Loaded Hydroxyapatite   总被引:6,自引:0,他引:6  
IntroductionIthaslongbeenknownthatsilveranditscompoundhavestronginhibitoryandbiocidaleffectsonbacteria[1] .SpadarofoundthatsilverionhadabiocidaleffectonasmanyassixteenkindsofbacteriaincludingEscherichiacoliandStaphylococcusaureus.Thismeansthatithasabroa…  相似文献   

18.
四川省斑腿蝗科三新种(直翅目:蝗总科)   总被引:1,自引:0,他引:1  
记述了采自四川省斑腿蝗科三新种,即古蔺卵翅蝗Caryandagulinensissp.nov.,笋子山蹦蝗Sinopodismasunzishanensissp.nov.及金沙拟凹背蝗Pseudoptygonotusjinshaensissp.nov.  相似文献   

19.
Forstudyingthedimensiontheoryofdynamicalsystem ,PesinintroducedCarath啨odorystructure(C structure)whichleadstothegeneralizationsofbothclassicaldimensionsandtopologicalpressures;HeconsideredtwotypicalC structureswhichconnectsrespectivelytheopencoveringand…  相似文献   

20.
Chitin ,whichmainlyconsistsof β(1→4 ) 2 acetamido 2 deoxy D glucopyranosestructuralunits ,isoneofthemostabundantformsofcarbohydratefoundinnature[1] .Recentdevelopmentshaveenabledtheuseofchitinandchitosaninvastlydiversefieldsrangingfromthemedicineandchemicali…  相似文献   

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