简介：TheprincipleofZVS-PWMinvertingcircuitisfirstdescribedbymeansofinvertingweldersupply.ThecontrastivestudyismadeonswitchingcharacteristicsandswitchinglossesofIGBTbetweenZVS-PWMandhard-switching.

简介：Thebuyer-supplierrelationshipplaysagreatroleinmosteconomicsystems.Thebuyingfirmusuallytriestofindanewsupplierwhoprovidesproductswithsatisfyingqualityandlowerprice.Abroadbranchofliteraturedealswiththedevelopmentofbuyer-supplierrelationships,butlimitedresearchisonthecircumstancesunderwhichabuyershouldterminatesucharelationshipandswitchtoanewsupplier.Inthispaper,theincentivecompatibilityconstraint(IC)whichinducestheentrantsuppliertoreporthistruecostisconsidered,andtheparticipationconstraint(PC)whichensurestheentrantsuppliertogetatleastreservationprofitistakenintoaccount.Thenthesupplierswitchingmodelissetuptominimizethebuyingfirm’stotalprocurementcostwhichincludesthetransferpaymenttotheincumbentsupplier,thepaymenttotheentrantsupplierandtheswitchingcost,andthebuyingfirm’sswitchingcostisconsideredasafunctionoftheswitchingquantity.WiththetheoreticalanalysisofIC,PCandtheproposedmodel,theoptimalsupplierswitchingstrategycanbeobtained.Finally,anumericalexampleisgiventoillustratetheeffectivenessoftheproposedmodelandtheswitchingstrategy.

简介：In2001,CSRpowersupplysystemmadeagreatprogress.ThreeprototypesweredesignedforCSRquadrupleandcorrectmagnet.Threedifferentcompaniesprovidedthethreeprototypes,butthesamecircuit-chopperwereemployed.ThesimplifieddiagramisshowedinFig.1.Allpulsedswitchingpowersupplyprototypesweretestedsuccessfullybeforetheendof2001.

简介：Thisworkdevelopsnear-optimalcontrolsforsystemsgivenbydifferentialequationswithwidebandnoiseandrandomswitching.Therandomswitchingismodeledbyacontinuous-time,time-inhomogeneousMarkovchain.Underbroadconditions,itisshownthatthereisanassociatedlimitproblem,whichisaswitchingjumpdiffusion.Usingnear-optimalcontrolsofthelimitsystem,wethenbuildcontrolsfortheoriginalsystems.Itisshownthatsuchconstructedcontrolsarenearlyoptimal.

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简介：Domainswitchingisthemainsourceofnonlinearcharacteristicsinferroelectrics.Accordingtocrystalplasticitytheory,thedomainsanddomainswitchingsystemsforperovskitetypestructureferroelectricsaredefined.Consideringthetraversemotionperformanceofdomainwall,arathersimplifiedformofevolutionlawaboutincrementalofvolumefractionduringdomainswitchinghasbeendeveloped.Themainfactors,whichexertaninfluenceondomainswitching,suchasmaterialparameters,domainwallmotionhistory,kindofdomainswitching(180°or90°)andvolumefraction,couldbeaddressed.Thehysteresisloopsofspontaneouselectricpolarizationasafunctionofelectricfield,thebutterflyshapedstrainversuselectricfieldcurveandtheplatformrelationsbetweenspontaneouspolarizationandstress,aswellasthelongitudinalstrainandstress,arewellsimulatedanddiscussed.

简介：抵抗切换(RS)行为为数据存储由于他们的有希望的潜力吸引了大兴趣。在各种各样的材料之中，基于氧化物的设备看起来就他们有互补金属氧化物半导体技术的方便制造和相容性而言更有益，尽管内在的机制由于RS行为的差异仍然是争论的。在这评论，我们集中于基于氧化物的RS记忆，工作机制能根据一个所谓的细丝模型的意见基本上在被理解。细丝形成/破裂进程，途径发展了检测并且描绘细丝，在基于氧化物的抵抗随机改进RS和量传导力行为的表演的几次有效尝试存取存储器(RRAM)设备分别地被探讨。

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简介：Opticalburstswitching(OBS)isapromisingopticalswitchingtechnology.Theburstassemblyalgorithmcontrolsburstassembly,whichsignificantlyimpactsperformanceofOBSnetwork.Thispaperprovidesanewassemblyalgorithm,unitedassemblyalgorithm,whichhasmorepracticabilitythanconventionalalgorithms.Inaddition,somefactorsimpactingselectionsofparametersofthisalgorithmarediscussedandtheperformanceofthisalgorithmisstudiedbycomputersimulation.

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简介：Awheeledmobilemechanismwithapassiveand/oractivelinkagemechanismforroughterrainenvironmentisdevelopedandevaluated.Thewheeledmobilemechanismwhichhashighmobilityinroughterrainneedssophisticatedsystemtoadaptvariousenvironments.Wefocusonthedevelopmentofaswitchingcontrollersystemforwheeledmobilerobotsinroughterrain.Thissystemconsistsoftwosub-systems:anenvironmentrecognitionsystemusinglinkanglesandanadaptivecontrolsystem.Intheen-vironmentrecognitionsystem,weintroduceaSelf-OrganizingMap(SOM)forclusteringlinkangles.Intheadaptivecontrol-lers,weintroduceneuralnetworkstocalculatetheinversemodelofthewheeledmobilerobot.Theenvironmentrecognitionsystemcanrecognizetheenvironmentinwhichtherobottravels,andtheadjustablecon-trollersaretunedbyexperimentalresultsforeachenvironment.Thedualsub-systemswitchingcontrollersystemisexperi-mentallyevaluated.Thesystemrecognizesitsenvironmentandadaptsbyswitchingtheadjustablecontrollers.Thissystemdemonstratessuperiorperformancetoawell-tunedsinglePIDcontroller.

简介：Aplasmoniccavityfilledwithactivematerialisproposedtoexplainopticalswitching.Opticalproperties,includingtransmission,responsetime,andfielddistributionofon/offstate,arenumericallyinvestigated.Wedemonstratethatsuchagain-assistedplasmonicstructurecanachieveopticalswitchinginthenan-odomainandshortentheswitchingtimetothesubpicosecondlevel.Ourresultsindicatethepotentialapplicationoftheproposedstructureinopticalcommunicationandphotonicintegratedcircuits.

简介：与NOLM切换的微波photonic上的XPM的影响被能解决联合非线性的Schr的裂口步Fourier方法(SSFM)分析?dinger方程(CNLSE)。模拟结果证明XPM导致波形的失真和方面脑叶的漏缝。并且调整带宽越大，方面脑叶的漏缝是越多larger。而且，因为导致XPM的nonreciprocity，NOLMTm的力量传播功能被弄歪：当时，Tm减少couplerf鈭?的切开的比率0,0.5)并且增加什么时候f鈭?0.5,1)。CLC数字O451这研究被中国(号码60272048)的国家科学基金支持，为上海的优秀教师讲师的特殊科学基础。

简介：Anoveladaptiveswitchingfilter(ASF)basedondirectionaldetectionisproposedfordenoisingtheimagesthatarehighlycorruptedbyimpulsenoise.Theproposedalgorithmemploysanefficientnoisedetectionmechanism.Itfirstemploysanefficientmethodtoestimatethedifferencesbetweenthecurrentpixelanditsneighborsalignedwith28directions.Thecurrentnoisepixelisreplacedbyamedianorameanvaluewithinanadaptivefilterwindowwithrespecttodifferentnoisedensities.Experimentalresultsshowthattheproposedapproachcannotonlyachieveverylowmiss-detectionratioandfalse-alarmratioevenuptohighnoisecorruption,butalsopreservethedetailedinformationofanimageverywell.

简介：Optimalswitchingandimpulsecontrolsforadistributedparametersystemsareconsidered.Weprovethatthevaluefunctionsu_u(·)ofapproximatingproblemsapproachtothevaluefunctionu(·)oftheoriginalproblem,whileu_u(·)istheuniqueviscositysolutionofthecorrespondingHamilton-Jacobi-Bellmansystem.Wealsoconstructanoptimalcontrolfortheoriginalproblemviathevaluefunctionu(·).

简介：Regimeswitching,whichisdescribedbyaMarkovchain,isintroducedinaMarkovcopulamodel.Weprovethatthemarginals(X,H~i),i=1,2,3oftheMarkovcopulamodel(X,H)arestillMarkovprocessesandhavemartingaleproperty.Inthisproposedmodel,apricingformulaofcreditdefaultswap(CDS)withbilateralcounterpartyriskisderived.更多还原

简介：ThisworkfocusesonstochasticLi′enardequationswithstate-dependentswitching.First,theexistenceanduniquenessofastrongsolutionareobtainedbysuccessiveconstructionmethod.Next,strongFellerpropertyisprovedbyintroducingcertainauxiliaryprocessesandusingtheRadon-Nikodymderivativesandtruncationarguments.Basedontheseresults,positiveHarrisrecurrenceandexponentialergodicityareobtainedundertheFoster-Lyapunovdriftconditions.Finally,examplesusingvanderPolequationsarepresentedforillustrations,andthecorrespondingFoster-Lyapunovfunctionsfortheexamplesareconstructedexplicitly.

简介：Itiswellknownthatthetransientbehaviorsofthetraditionaladaptivecontrolmaybeverypooringeneral,andthattheadaptivecontroldesignedbasedinswitchingbetweenmultiplemodelsisanintuitivelyappealingandpracticallyfeasibleapproachtoimprovethetransientperformances.Inthispaper,weshallprovethatforatypicalclassoflinearsystemsdisturbedbyrandomnoises,themultiplemodelbasedleast-equares(LS)adaptiveswitchingcontrolisstatbleandconvergentandhasthesameconvergencerateasthatestablishedforthestandardleast-squares-basedself-tunningregulators.Moreover,themixedcasecombiningadativemodelswithfixedmodelsisalsoconsidered.

简介：这篇论文与交换路径使不安处理交换线性系统的稳定性问题。首先，由介绍孩子路径的观点；父母路径，我们能定义在二之间的距离借助于他们的切换的矩阵链交换路径。下次，我们在场定义距离的好性质。然后，一个稳定性标准与交换路径使不安为交换线性系统的一个类被介绍。最后，一个解说性的例子被举验证途径的有效性。

简介：Micromechanicalfiniteelementmethodsaredevelopedbasedonanonlinearconstitutivemodelofferroelectricpolycrystals.Electromechanicalbehaviorsaheadofaninternalelectrodetiparenumericallysimulatedinmultilayerferroelectricactuators.Aroundtheelectrodeedge,thenonuniformelectricfieldgeneratesaconcentrationofstressduetotheincompatiblestrainaswellasspontaneousstrain.Thepreferreddomainswitchingenhancestheconcentrationofresidualstressandmaycausetheactuatorstocrack.Anelectricallypermeablecrackemanatingfromaninternalelectrodeisanalyzed.Alargescaledomainswitchingzoneisfoundinthevicinityofcracktips.Thelargertheactuatingstrainandelectricfieldare,thelargertheswitchingzonewillbe.Thesizeofswitchingzoneevenreachesthescaleofcracklengthwithincreasingelectromechanicalloading.