简介:1.IntroductionTheEMCdesignforthePrintedCircuitBoardhasbeenapopulartopic.Guidelinesandtipsforhigh-speedPCBdesignscouldbefoundfromnumerousresources.WheninvestigatingEMIissuesassociatedwithcircuitboards,manydetailssuchasclockfrequencies,switchingrates,rise/falltimes,signalharmonics,datatransferrates,impedances,traceloading,andtypesandvaluesofthevariouscircuitcomponents,shouldbetakenintoconsiderations.ThephysicallayoutofthePCboardanditsassociatedmetalliccomponentsareimportantconsiderations.Specialattentionshouldbegiventotheplacementandcharacteristicsofsignalsourcecomponents,vias,
简介:ntroductionThemeaningoftheexpressiongisbi2-(in)-DU3,intheroyalinscriptionofUtu-hegalrecordinghisvictoriouscampaignagainstGutium,isstillnuclear.F.Thureau-Dangin(1912)readtheexpressiongis-ne-GAGwiththetranslation"tosacrifice"followedbyseveralotherscholars(Kramer1963,325f.;IRSA,130-2).W.H.Ph.Romerhashowever,inhistreatmentoftheinscription,mostconvincinglyarguedfortherejectionofthistranslation.2Inadditiontohisarguments,wemayperhapsaddthatthedifferentcontextsinwhichgisbi2-DU3ismentioneddonotseemtobeofareligiousch...
简介:Theexistingfundamentallawsofthermodynamicsformicropolarcontinuumfieldtheoriesarerestudiedandtheirincompletenessispointedout.Newfirstandsecondfundamentallawsforthermostaticsandthermodynamicsformicropolarcontinuaarepostulated.Fromthemallequilibriumequationsandtheentropyinequalityofthermostaticsaswellasallbalanceequationsandtheentropyrateinequalitiesarenaturallyandsimultaneouslydeduced.Thecomparisonsbetweenthenewresultspresentedhereandthecorrespondingresultsdemonstratedinexistingmonographsandtextbooksconcerningmicropolarcontinuummechanicsaremadeatanytime.Itshouldbeemphasizedtonotethat,theproblemofwhythelocalbalanceequationofenergyandthelocalentropyinequalitycouldnotbeobtainedfromtheexistingfundamentallawsofthermodynamicsformicropolarcontinua,isbelievedtobeclarified.
简介:IntheexistingliteratureofRepairableQueueingSystems(RQS),i.e.,queueingsystemswithserverbreakdowns,itisalmostallassumedthatinterarrivaltimesofsuccessivecustomersareindependent,identicallyexponentiallydistributed.Inthispaper,wedealwithmoregenericsystemGI/PH/1withserver'sexponentialuptimeandphase-typerepairtime.Withmatrixanalysistheory,weestablishtheequilibriumconditionandthecharacteristicsofthesystem,derivethetransientandstationaryavailabilitybehaviorofthesystem.