简介:ThesoftswitchingareweldinginverterreducesswitchinglossesandimprovesoperatingenvitonmentofdevicesbyusingZero-Voltage-Transition(ZVT)technique.Step-by-stepanalysisofeachtimingintervalandtheassociatingvoltageandcurrentwaveformsareincludedfortheFull-BridgeZero-Voltage-SwitchedPWMcomerter,Numerousdesignequationssupportingthephase-shiftedsoftswitchingtechniquearehighlighte.
简介:药的效果的研究,kanamycin,在recombinantEscherichiacoli的生长新陈代谢上,B1被对待的细胞的新陈代谢的活动监视的microcalorimeter执行。种recombinantEscherichiacoli房间暂停的力量时间曲线,与不同kanamycin剂量对待,被记录。效果的程度被变化在microcalorimetric曲线的斜坡评估,药行动的动力学从这些变化在到达了他们的最大的价值并且维持了他们的最大的价值的时间被解释。试验性的剂量效果关系遵循集体行动的法律的中部效果的原则:fa/(1?fa)=(D/D50)m。y=lg的一个阴谋[(fa)1?1]?1对x=lgD给斜坡m,D50和R。试验性的结果表明kanamycin的高集中在lg阶段在recombinantEscherichiacoliB1的生长上有禁止的效果,并且在静止时期有支持的效果。而且,microcalorimetry是为在生物学的调节效果的察觉的一个可靠方法,这被表明。
简介:Addressingthedifficultiesofscatteredandsparseobservationaldatainoceanscience,anewinterpolationtechniquebasedoninformationdiffusionisproposedinthispaper.Basedonafuzzymappingidea,sparsedatasamplesarediffusedandmappedintocorrespondingfuzzysetsintheformofprobabilityinaninterpolationellipsemodel.Toavoidtheshortcomingofnormaldiffusionfunctionontheasymmetricstructure,akindofasymmetricinformationdiffusionfunctionisdevelopedandacorrespondingalgorithm-ellipsemodelfordiffusionofasymmetricinformationisestablished.ThroughinterpolationexperimentsandcontrastanalysisoftheseasurfacetemperaturedatawithARGOdata,therationalityandvalidityoftheellipsemodelareassessed.
简介:摘要Carbon monoxide (CO) poisoning is the leading cause of poisoning-related deaths globally. The currently available therapy options are normobaric oxygen (NBO) and hyperbaric oxygen (HBO). While NBO lacks in efficacy, HBO is not available in all areas and countries. We present a novel method, extracorporeal hyperoxygenation therapy (EHT), for the treatment of CO poisoning that eliminates the CO by treating blood extracorporeally at elevated oxygen partial pressure. In this study, we proof the principle of the method in vitro using procine blood: Firstly, we investigated the difference in the CO elimination of a hollow fibre membrane oxygenator and a specifically designed batch oxygenator based on the bubble oxygenator principle at elevated pressures (1, 3 bar). Secondly, the batch oxygenator was redesigned and tested for a broader range of pressures (1, 3, 5, 7 bar) and temperatures (23, 30, 37 ℃). So far, the shortest measured carboxyhemoglobin half-life in the blood was 21.32 min. In conclusion, EHT has the potential to provide an easily available and effective method for the treatment of CO poisoning.
简介:Inthisstudy,avariationalapproachtothesettlementanalysisofanaxiallyloadedpierem-beddedinamulti-layeredsoilprofileispresented.Inthismethod,thesoilprofileandtheembeddedpieraredividedintoanumberofsub-layersaccordingtotheactualnumberofsoillayersobservedinthefield.ThedisplacementshapefunctionofeachsoillayerisgivenasaproductofanexponentialequationalongthepierdepthandtheBessel’ssolutionintheradialdirection.Thedisplacementrelationshipamongthelayerscanbederivedthroughthetransformationmatrices.Oneofthemajorfeaturesofthismethodisthatthetotalnumberofpierelementsisthesameasthatofsoilsub-layers.Allthefieldcompontents,suchasthedisplacement,stress,andstraininthesoil,canbecalculatedbyclosed-formsolutionsexceptthattheonlyunknownvari-ableisthevalueβwhichcanbedeterminedbyiterationtechniques.Comparisonsweremadewiththeresultsoffiniteelementanalysisandthefieldobservationinpile-loadedtests.
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简介:这份报纸涉及部分观察的最佳的控制问题为随机推迟系统。有一种标准变化技术的联合Girsanovs定理,作者在系统方程包含的假设上获得一个最大的原则时间延期和控制域凸。当,相关伴随过程被描绘答案在有限维的空格期望了向后的随机的微分方程。然后,建议理论结果被使用学习部分观察的线性二次的最佳的控制为随机的延期的问题系统和明确的看得见的控制变量被给。
简介:ThispaperstudiestheelectronicstructureandnativedefectsintransparentconductingoxidesCuScO2andCuYO2usingthefirst-principlecalculations.Sometypicalnativecopper-relatedandoxygen-relateddefects,suchasvacancy,interstitials,andantisitesintheirrelevantchargestateareconsidered.Theresultsofcalculationshowthat,CuMO2(M=Sc,Y)isimpossibletoshown-typeconductivityability.ItfindsthatcoppervacancyandoxygeninterstitialhaverelativelylowformationenergyandtheyaretherelevantdefectsinCuScO2andCuYO2.Coppervacancyisthemostefficientacceptor,andunderO-richconditionoxygenantisitealsobecomesimportantacceptorandplaysanimportantroleinp-typeconductivity.
简介:ThepossiblegeometricalstructuresandrelativestabilitiesofsemiconductormicroclustersGa.P.(n=1-4)werestudiedbyvirtueofdensityfunctionalcalculationswithgeneralizedgradientapproximation(B3LYP).ForthemoststableisomersofGa,,P.(n=1-4)clusters,theelectronicstructure,vibrationalproperties.dipolemoment,polarizabilityandionizationpotentialwereanalyzedbymeansofHF.MP2.CISDandB3LYPmethodswithdifferentbasissets.
简介:Rapidprotoypemanufacturing(RPM)isanewadvancedmanufacturingtechnology,whichisbasedonthephilosophyofmaterialsincreaingoflaybylayforming,Zeroadventurerapiddesign/manufacturingcanberealizedwithrapidprototypesof3DCADofproducts,RapidprotoypinghasbeenaneffectivetoolofR&Dofnewproducts,Anovelrapidprototypingandmanufacturing(RP&M)techniqueisbroughforward,Theprincipleoftheprocessistoformlayeredsectionsandtomaketheprototypeorpartlayer-by-layerbydeflection-pro-jectionofelectricchargedpowdergranulespassingthroughelectricormagneticfileldandbycontrollablelineandfieldscanofthepowdergranulebeam.Thefeasibilityissueoftheprocessistheoreticallyandexperimentallyinvestigated,Itshowthatdeflection-projectionofelectricchagedpowdergranulesbeampassingthroughelectricfieldcanbesignificantandfeasibletotherapidprotoypingtechnique.
简介:Inthispaper,thestresssingularityanalysisatthecracktiponelasticbi-materialinter-facesisconsidered.ThegoverningequationsofplaneelasticityinsectorialdomainarederivedtobeinHamiltonianformviavariablesubstitutionandvariationalprinciple.Themethodsofseparationofvariablesandconjugatesymplecticeigen-functionexpansionaredevelopedtosolvetheequationsinsectorialdomain.Thegeneralformulaeforthesolutionofstresssingularitiesatthecracktiponbi-ma-terialinterfacesareputforward,andanewsolutiontechniqueforfractureproblemsispresented.
简介:Recently,therehasbeenmuchattentiondevotedtoresolvingthequantumcorrectionstotheBekenstein-Hawkingblackholeentropy.Inparticular,manyresearchershaveexpressedavestedinterestinthecoefficientofthelogarithmictermoftheblackholeentropycorrectionterm.Inthispaper,wecalculatethecorrectionvalueoftheblackholeentropybyutilizingthegeneralizeduncertaintyprincipleandobtainthecorrectiontermcaused,bythegeneralizeduncertaintyprinciple.BecauseinourcalculationwethinkthattheBekenstein-Hawkingareatheoremisstillvalidafterconsideringthegeneralizeduncertaintyprinciple,wederivethatthecoefficientofthelogarithmictermoftheblackholeentropycorrectiontermispositive.Thisresultisdifferentfromtheknownresultatpresent.Ourmethodisvalidnotonlyforfour-dimensionalspacetimesbutalsoforhigher-dimensionalspacetimes.Inthewholeprocess,thephysicsideaisclearandcalculationissimple.Itoffersanewwayforstudyingtheentropycorrectionofthecomplicatedspacetime.
简介:Basedonthesteady-statesolutionoffinite-statebirthanddeathprocess,theprincipleoflineconfigurationforsharedmulti-channelsystemisanalyzed.Callcongestionratioequationandchannelutilizationratioequationarededuced,andvisualizeddataanalysisispresented.Theanaly-sisindicatesthat,calculatedwiththeproposedequations,theoverestimateforcallcongestionratioandchannelutilizationratiocanberectified,andtherebythecostofchannelscanbesavedby20%inasmallsystem.WithMATLABprogramming,lineconfigurationmethodsareprovided.Inordertogenerallyandintuitivelyshowthedynamicrunningofthesystem,andtoanalyze,promoteandimproveit,thesystemissimulatedusingM/M/n/n/mqueuingmodelandMonte-Carlomethod.Inaddition,thesimulationvalidatesthecorrectnessofthetheoreticalanalysisandoptimizingconfigurationmethod.