共查询到20条相似文献,搜索用时 78 毫秒
1.
IntroductionInthestudyofanelectricalnetworkorapowersystem,theconceptofenergyfunctionisveryusefulindeducingthetransientstabilityofthesystem.BasedondissipativetheoryandnonlinearH∞approach,thispaperdiscussestwospecialsupplyrates,whichcorrespondtopassivi… 相似文献
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IntroductionThemethodologyofmulticlassifiercombinationattractsextensiveattentionfromresearchersinthefieldofpatternrecognition.Mostresearchesfocusonhowtoselectthebestresultfromthosegivenbyseveraldifferentclassifiersforthepurposeofthebestrecognitionra… 相似文献
3.
Thedioxotetraamineligandspossessthestructuressimilartothoseoftheoligopeptides .Theyareabletoformstablecomplexeswithtransitionmetalions .Theirtwoamidemoietieslosehydrogenionsduringcoordinationwithdivalentmetalions,thereforetheyareabletosta bilizehighoxid… 相似文献
4.
ZHANG Lihua 《清华大学学报》1999,4(4):1602-1605
IntroductionPointpatternmatchingisanimportanttopicinthefieldsofcomputervisionandpatternrecognition.Itsmaintaskistopairupthepointsintwoimagesofthesamescenewhenthereisageometrictransformationrelatingthetwoimages.Thetransformationmayberigidtransformati… 相似文献
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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
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Thesurvivabilityofamissilesiloagainstablastwaveconstitutesacriticalissuefornationaldefense.Atriplelayerstructureisdesignedtostrengthentheprevioussinglelayerdesign.AsshowninFig1,thebottomlayerisacircularplatemadeofreinforcedconcrete(RC).Tworingsofsimples… 相似文献
8.
N.L. Saini 《中国科学技术大学学报》2001,31(3):289-298
IntroductionThehighTcsuperconductorsarelayeredmaterialswithCuO2 planes ,separatedbyinsulatingrock saltoxidelayers.TheimportanceoftheCuO2 planeshascreatedmajorinteresttostudytheelectronicandstructuralbehaviourofthesestructuralelementssincethediscoveryofth… 相似文献
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IntroductionCentrifugalcompressorsareusedwidelyinindustryduetotheiradvantagesofsimplestructureandhighpressureratio.Theirefficiencyandstabilityareadverselyinfluencedbythepresenceofimpellerexitflownonuniformity.Inrecentyears,asaresultofimprovementsin… 相似文献
10.
显著提高大肠杆菌中外源基因表达产物可溶性的双顺反子表达载体pNJUTRX-1 总被引:1,自引:1,他引:0
TheexpressionofheterologousproteinsinEscherichiacolihasbecomeastandardtech niqueinmolecularbiology .E .coliexpressionsystemshavetheadvantagesofproductioneco nomicsandlogistics .TheseadvantageshavemadeE .coliexpressionsystemapopularchoicefortheproductionof… 相似文献
11.
IntroductionThephotosynthesislightreactionin plantsoccursinthethylakoidmembraneofthechloroplasts .Theproteincomplexesinthethylakoidmembranesaresupermolecularsystemsconsistingof proteins ,lipidsand pigmentswhichregulateandcontrolthelightenergyabsorption ,… 相似文献
12.
ZHOU Donghua 《清华大学学报》1999,4(4):1597-1601
IntroductionNonlinearobserversarenecessaryfornonlinearcontrolsystemswhentherearenotenoughsensorstomeasureallthestatesoritisdifficulttomeasuresomeofthestatesbysensors.Sinceitsintroduction[1],nonlinearobservershaveattractedtheattentionofmanyresearchers… 相似文献
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Alexander V. Kolobov a) onleavefromA .F .IoffePhysico TechnicalInstitute StPetersburg Russia 《中国科学技术大学学报》2001,31(3):282-288
Thelatticemismatchbetweenthesubstrateandtheovergrownlayerallowstheformationofself as sembledquantumdots (QDs)throughtheStranski Krastanovmechanism[1,2 ] .Thistechniquehasbeensuccessfullyappliedtovarioussemiconductorsystems,andinparticulartoGe/Siquantumdots(Q… 相似文献
14.
WANG Xinxin 《清华大学学报》1999,4(4):1695-1697
IntroductionDenseplasmafocusdevices(DPF)[1]areusedtoproducepulsedplasmaswithhightemperatures(107K)anddensities(1019-1020cm-3)bymeansofextremelylargepulsedelectricaldischargeingases.AMathertypeDPFisshowninFig-1.Whenthesparkgapistriggered,thehighvoltag… 相似文献
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IntroductionPhotosystemⅡ (PSⅡ )ofhigherplantsisamembraneproteincomplexlocatedinthethylakoidmembrane ,whichconsistsofmorethan 2 0proteins[1] .Itusessolarenergytocarryouttheprimary processesof photosynthesis :chargeseparation ,quinonereduction ,andwateroxidationt… 相似文献
16.
Progressive Failure Simulation for Damaged Composite Laminates Using Nonlinear Finite Element Method
IntroductionThelongitudinaltensilepropertyofunidirectionalcompositeplateismainlydeterminedbythefiber.Thestressstrainrelationislinearforawidestrainrange,butthestressstrainrelationintransversedirectionandinshearisgenerallynonlinear.HahnandTsai[1]inve… 相似文献
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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.
Qu Yan |hui Non |linear Scientific Center Wuhan University Wuhan Hubei China 《武汉大学学报:自然科学英文版》2003,8(1):5-8
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