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1.Giveaformalordescriptivedefinitionforeachofthefollowingterms.（1）、ITRS：InternationalTechnologyRoadmapforSemiconductor.（2）、Gate-Equivalent：It’susedtomeasurethebasicunitofthecomplexityofthedigitalcircuit,andbasedontocompleteacircuitfunction,thenumberoflogicgatesareindependentofeachother.Agateequivalentstandsforaunitofmeasurewhichallowsspecifyingmanufacturing-technology-independentcomplexityofdigitalelectroniccircuit.（3）、TechnologyNodes：ATechnologyNodesisdefinedasthegroundrulesofaprocessgovernedbythesmallestfeatureprintedinarepetitivearray.（4）、Featuresize：Asinglegraphicminimalsize.Theminimumscaleinintegratedcircuitdevices.roughlyhalfthelengthofthesmallesttransistor.（5）、ICdesigncomplexitysources：Itcontainschipsize,powerdissipation,heterogeneity,variabilityandreliability.（6）、Behavioralrepresentation：Itrepresentsadesignasablackboxanddescribesitsoutputsintermsofitsinputsandtimes.Itindicatesnogeometricalinformationorstructuralinformationandtakestheformsoftextual,mathematics,oralgorithmicdescription.（7）、Abstractionhierarchy：Abstractionhierarchiesareahumaninventiondesignedtoassistpeopleinengineeringverycomplexsystemsbyignoringunnecessarydetails.Asetofinterrelatedrepresentationlevelsthatallowasystemtoberepresentedinvaryingamountsofdetail.（8）、ICdesign：Adesignisasetoftransformationsfromonerepresentationofasystemtoanotheruntilarepresentationthatcanbefabricatedexists.Integratedcircuitdesigninvolvesthecreationofelectroniccomponents,suchastransistors,resistors,capacitorsandthemetallicinterconnectofthesecomponentsontoapieceofsemiconductor,typicallysilicon.（9）、Synthesis：Theprocessoftransformingonerepresentationinthedesignabstractionhierarchyintoanotherrepresentation.（10）、Refinement：Theprocessoftransformingfunctionalrepresentationinthedesignabstractionhierarchyintogeometricalrepresentation.Refinementisagenerictermofcomputersciencethatencompassesvariousapproachesforproducingcorrectcomputerprogramsandsimplifyingexistingprogramstoenabletheirformalverification.（11）、System-levelsynthesis：ItdealswiththetransformationofanabstractmodelofbehaviorintoamodelconsistingofstandardfunctionalunitsandSystem-LevelSynthesisdealswiththeconcurrentdesignofelectronicapplications,includingbothhardwareandsoftware.（12）、logicsynthesis：Translationfromdataflowrepresentationtoastructurallogicgaterepresentation.（13）、Layoutsynthesis：Translationfromlogicgaterepresentationtolayoutrepresentation.Theaimsatcomputingthegeometricdata,especiallythemasklayout,fromacircuitdescriptioninformofanetlist.（14）、Partialdesigntree：Adesignhastheformofapartialtree.Itsbehaviorisspecifiedatdifferentlevels.Thissituationisencounteredbecomeonefrequentlywantstoevaluatetherelationshipsbetweensystemcomponentsbeforetheyhaveallbeencompletelydesigned.（15）、Designwindow：Wemeanarangeoflevelsoverwhichthedesignerworksindevelopingadesign-treestructure.（16）、Digitaldesignspace：Partitioningwascarriedoutinordertomeetsomeobjectivecriteria.Thesecriteriaarethemajorfactorsonehastoconsiderinarrivingatadesign.（17）、Statictiminganalysis:Statictiminganalysisisasimulationmethodofcomputingtheexpectedtimingofadigitalcircuitwithoutrequiringasimulationofthefullcircuit.（18）、Behavioralsimulation：alsocalledagent-basedsimulations,areinstrumentalintacklingtheecologicalandinfrastructurechallengesofoursociety.Thesesimulationsallowscientiststounderstandlargecomplexsystemssuchastransportationnetworks,insectswarms,orfishschoolsbymodelingthebehaviorofmillionsofindividualagentsinsidethesystem（19）、Postplaceandroutesimulation：Inthisstep,,thegate-levelcircuitwithaccuratetimingbackannotatedfromthelayoutisresimulatedtocheckcircuittimingandtoprovideafinalcheckoncircuitfunctionality.Post-placeandroutesimulationallowsyoutosimulateadesignwithtiminginformationsuchasgatedelaysincluded,whichmayilluminateerrorsinthedesignthatpreviousstepsdidnot.（20）、Composition-basedapproach：Anewcomposition-basedapproachshiftsthefocusfromcontentcreationtotheproblemsofevaluating,integrating,andverifyingmultiplepre-existingblocksandsoftwarecomponents.2.AccesstheInternetforinformationaboutDanielD.Gajski’s“Y-chart”methodologyforintegratedcircuitsdesign.Accordingtoyourinvestigationoftherelatedresearchpapersand/ortechnicalreports,pleasesummarizethe“Y-chart”theory,including(1)designrepresentationdomains,(2)designabstractionhierarchyand(3)designactivities.Referencesmustbelistedattheendofyourreport.Introduction：Y-charttheoryputforwardbyGajskiin1983,itmakesthedesignbecomingvisualanddistinct.ThetheoryhasbeenwidelyusedintheVHDLdesign,andletusmakethelevelofabstractmodelclearly.It'ssimple,buteverylevelhighlyabstractdesign,thefigureisverydelicatefromdifferentpointofviewthatwecanseetheentirelayout.Althoughthisideaisalsoverylong,butforthedesignofavarietyoflanguageandusehasalonginfluence.（1）、DesignRepresentationDomains:BehavioralRepresentation:Adomaininwhichacomponentisdescribedbydefiningitsinput/outputresponse.Itrepresentsadesignasablackboxanddescribesitsoutputsintermsofitsinputsandtimes.Itindicatesnogeometricalinformationorstructuralinformationandtakestheformsoftextual