简介：Theshipdesignprocessmodelisthebasisfordevelopingtheshipcollaborativedesignsystemundernetworkenvironment.Accordingtothecharacteristicsoftheshipdesign,amethodfordividingtheshipdesignprocessintothreelayersispatforward,thatisprojectlayer,designtasklayeranddesignactivitylayer,thentheformalizeddefinitionsoftheshipdesignprocessmodel,thedecomposingprinciplesoftheshipdesignprocessandthearchitectureoftheshipcollaborativedesign(SDPM)systemarepresented.Thismethodsimplifiestheactivitynetwork,makestheoptimizationandadjustmentofthedesignplanconvenientandalsomakesthedesignprocesseasiertocontrolandchange,atlastthearchitectureoftheshipcollaborativedesignsystemisdiscussed.

简介：Withtherapiddevelopmentofdeepsubmicron(DSM)VLSIcircuitdesigns,manyissuessuchastimeclosureandpowerconsumptionaremakingthephysicaldesignsmoreandmorechallenging.InthisreviewpaperweprovidereaderswithsomerecentprogressoftheVLSIphysicaldesigns.Therecentdevelopmentsoffloorplanningandplacement,interconnecteffects,modelinganddelay,bufferinsertionandwiresizing,circuitorderreduction,powergridanalysis,parasiticextraction,andclocksignaldistributionarebrieflyreviewed.

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简介：ＡＣＯＮＦＩＧＵＲＡＴＩＯＮＳＹＳＴＥＭＦＯＲＦＡＳＴＥＮＥＲＤＥＳＩＧＮ（ＡＮＡＰＰＲＯＡＣＨＴＯＷＡＲＤＳＣＯＭＰＵＴＥＲＡＩＤＥＤＣＯＮＣＥＰＴＵＡＬＤＥＳＩＧＮ）ＧｕａｎｇＺｈｏｎｇ；ＭｉｋｅＤｏｏｎｅｒＡＣＯＮＦＩＧＵＲＡＴＩＯＮＳＹＳＴＥ...

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简介：ＡＣＡＤＳＹＳＴＥＭＦＯＲＣＡＲＰＥＴＤＥＳＩＧＮＭａＹｕｈａｉ；ＷａｎｇＹａｎ；ＳｈｉＷａｎｃｈｕｎＡＣＡＤＳＹＳＴＥＭＦＯＲＣＡＲＰＥＴＤＥＳＩＧＮ￥ＭａＹｕｈａｉ；ＷａｎｇＹａｎ；ＳｈｉＷａｎｃｈｕｎＡｂｓｔｒａｃｔＴｈｉｓｐａｐｅｒｐｒｅｓｅ...

简介：Weldingtransformeriswidelyusedinindustrymanufacturing,depletingalargePortionofelectricityenergy.Basedonmoderncomputerandmathematicalprogramming,Optimundesignofelectro-magneticdevicesleadstohighlyefficientuseofenergrandmaterials.Arcweldingtransformerisoptimizedhere.Amathematicalmodel,consideringbothproductivecostandoperatinglosses,whichiscalledarEconomical-through-Lifetransformer,isestab-lished.Mixedfunctionmethod,mixeddispersingvariablemethodandimprovedorthogonalmethodhavebeenappliedtocarryouttheoptimizationcalculations.ResultshowsthatthepowerfactorisquiteimportantinanEconmi-cal-through-Lifetransformer,andthatsomeprinciplesmustbefollowedinthedesignwork.Alsodiscussedarethead-vantagesanddisadvantagesofthethreemethods.Intheend,theprospectofoptimumdesignofweldingtransformerisforecast.

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简介：FourbumpersarerequiredfortheinjectionandextractionofCSR.Theparametersofthebumpersareshownintable1.Becauseofthesteepraisingandfallingtimeandthereforetheinductanceofthemagnetshouldbeassmallaspossible,sothematerialofthemagnetcoresmustbeferrite.Andinordertoreducethecostofthebumpmagnet,thecross-sectionofthefourferritecoreswasdesignedasthesame,asshowninFig.1.ItisverysimilartothelaminationoftheH-typedipole.AndFig.2isthe...

简介：Flushingpipeoutletsareprovidedatthefloorofsedimentationbasinsforflushingoutofthedepositedsediments.Theseoutletshavetobepositionedinsuchawaysoastoremovethedepositedsedimentseffectively.Intheabsenceofrationalmethodforthelocation,presentlytheoutletsarelocatedbyjudgment.Areviewofliteratureindicatedthatthereisnojudiciousmethodavailableforobtainingtheoutletdiameter.Presentedhereinarethedesignequationsfortheflushingoutlets.Itishopedthattheequationwillbeusefultothedesignengineers.

简介：ThedevelopmentofInternetprovidesconvenientenvironmentforinformationsearchingandbrowsing.Italsoofferssanewplatformforgeographicinformationprocessingandanalysis.ThispaperdiscussesorganizationandprocessingapproachtoInternetgeographicinformation,andprovidesanewmethodtocross-platformanddistributedgeographicinformationanditssoftwareimplementation.Theexampieisusedtoshowthepracticalityandsuperiorityofthismethod

简介：Oneoftheopenissuesinprincipleschemedesignofmechanicalsystemsisprinciplerepresentation,whichnotonlyoutliesthephysicalprinciples,butalsofacilitatesthedesignsynthesis.Anenergy-basedapproachtorepresentprincipleschemedesignisproposed.Firstly,anenergyinteractionmodelofmechanicalsystemsisestablishedandanintermediatemodelisderived,inwhichprincipleschemedesignistransformedintosolvingtheenergyfunctionsofsystem.Thentheenergyfunctionsaremodeledwiththelanguageofbondgraphs,andprinciplerepresentationforcomponenytsispresented.Finally,characteristicsofthedevelopedrepresentationapproachareanalyzedandadesignexampleofgatedrivesystemisgiventodemonstratethisapproach.

简介：AnelectromagnetdesignsystemisdevelopedusingVisualC++languageandOpenGLtechnologytovisualizeparametric3Dmodel.Thesystemconsistsofprimarydesign,optimizationdesign,dynamicandstaticcharacteristics,andvisualsimulation.Allempiricalparametersandcurvesusedindesignprocessarestoredindatabase.Throughhuman-computerinteractions,anelectromagneticsystemcanbedesignedconvenientlywiththeresultsandcharacteristicscurvesdisplayedingraphicmodel.Usingthissystemcangreatlyshortentheprocessofproductdesign,andtheresultssatisfytechnicalrequirements.

简介：１ＩｎｔｒｏｄｕｃｔｉｏｎＮＣｌａｙｏｕｔｄｅｓｉｇｎｄｅａｌｓｍａｉｎｌｙｗｉｔｈｔｈｅｍｏｖｅｍｅｎｔｓｔｒｕｃｔｕｒｅａｎｄｔｈｅ３－ｄｉｍｅｎｔｉｏｎａｌｓｐａｔｉａｌａｒｒａｎｇｅｍｅｎｔｏｆｍｏｄｕｌｅｓｉｎＮＣｓｙｓｔｅｍｓ．Ｈｕ［１］...

简介：Ahybridapproachforfuzzysystemdesignbasedonclusteringandakindofneurofuzzynetworksisproposed.Anunsupervisedclusteringtechniqueisfirstlyusedtodeterminethenumberofif-thenfuzzyrulesandgenerateaninitialfuzzyrulebasefromthegiveninput-outputdata.Then,aclassofneurofuzzynetworksisconstructedanditsweightsaretunedsothattheobtainedfuzzyrulebasehasahighaccuracy.Finally,twoexamplesoffunctionapproximationproblemsaregiventoillustratetheeffectivenessoftheproposedapproach.

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简介：ＡｎＩｎｔｅｌｌｉｇｅｎｔＤｅｓｉｇｎｏｆＥｌｅｃｔｒｏｎＬｅｎｓＳｙｓｔｅｍ￥ＬｅｔＷｅｉ；ＴｏｎｇＬｉｎｓｕ＆ＷｕＳｈｅｎｇｌｉ（ＥｌｅｃｔｒｏｎｉｃＥｎｇｉｎｅｅｒｉｎｇＤｅｐａｒｔｍｅｎｔｏｆＳｏｕｔｈｅａｓｔＵｎｉｖｅｒｓｉｔｙ，Ｎａｍｉｎ...

简介：Animprovedstructureoflineartransconductorispresentedinthispaper.ItisanalyzedintheoryandsimulatedwithSpectrebasedon0.25μmCMOSprocess.Thesimulationresultsshowthatthedifferentialinputvoltageoftheproposedtransconductoris4.0Vpp(peaktopeak),whereasthedifferentialinputvoltageoftheexistingsourcedegenerationstructureis2.2Vpp,whentheirnonlinearerrorsarerequiredtobelessthan0.15%.