简介:Traditionaldigitalprocessingapproachesarebasedonsemiconductortransistors,whichsufferfromhighpowerconsumption,aggravatingwithtechnologynodescaling.Tosolvedefinitivelythisproblem,anumberofemergingnon-volatilenanodevicesareunderintenseinvestigations.Meanwhile,novelcomputingcircuitsareinventedtodigthefullpotentialofthenanodevices.Thecombinationofnon-volatilenanodeviceswithsuitablecomputingparadigmshavemanymeritscomparedwiththecomplementarymetal-oxide-semiconductortransistor(CMOS)technologybasedstructures,suchaszerostandbypower,ultra-highdensity,non-volatility,andacceptableaccessspeed.Inthispaper,weoverviewandcomparethecomputingparadigmsbasedontheemergingnanodevicestowardsultra-lowdissipation.
简介:Abriefaccountisprovidedoncrack-tipsolutionsthathaverecentlybeenpublishedintheliteraturebyemployingtheso-calledGRADELAmodelanditsvariants.TheGRADELAmodelisasimplegradientelasticitytheoryinvolvingoneinternallengthinadditiontothetwoLame'constants,inanefforttoeliminateelasticsingularitiesanddiscontinuitiesandtointerpretelasticsizeeffects.Thenon-singularstrainsandnon-singular(butsometimessingularorevenhypersingular)stressesderivedthiswayunderdifferentboundaryconditionsdifferfromeachotherandtheirphysicalmeaninginnotclear.Thisisdiscussedwhichfocusontheformandphysicalmeaningofnon-singularsolutionsforcrack-tipstressesandstrainsthatarepossibletoobtainwithintheGRADELAmodelanditsextensions.
简介:ForthereliabilityandpowerconsumptionissuesofEthernetdatatransmissionbasedonthefieldprogrammablegatearray(FPGA),alow-powerconsumptiondesignmethodisproposed,whichissuitableforFPGAimplementation.Toreducethedynamicpowerconsumptionofintegratedcircuit(IC)design,theproposedmethodadoptsthedynamiccontroloftheclockfrequency.Formostofthetime,whentheportisintheidlestateorlower-ratestate,userscanreduceoreventurnoffthereadingclockfrequencyandreducetheclockflipfrequencyinordertoreducethedynamicpowerconsumption.Whenthereceivingrateishigh,thereadingclockfrequencywillbeimprovedtimelytoensurethatnodatawilllost.SimulatedandverifiedbyModelsim,theproposedmethodcandynamicallycontroltheclockfrequency,includingthedynamicswitchingofhigh-speedandlow-speedclockfliprates,orstopoftheclockflip.
简介:ThispaperputsforwardanewfaultdiagnosismodelbasedonPetrinet.Inthisnewfaultdiagnosismethod,anassociatedtreeisfirstdefinedtodescribethelogicaccordingtotheprotectionsandcircuitbreakers.AfterthataPetrinetdiagnosismodelcomesintobeingandtheprecisediagnosisofpowergridelementscanberealizedatthesametime.Thesimulationresultsgiveninthispaperillustratethatthisfaultdiagnosismethodcanmakearapiddiagnosisincomplexfaultsituationandgiveaccurateresultstopowergridfaultdiagnosis.
简介:Largesizedpowertransformersareimportantpartsofthepowersupplychain.Theseverycriticalnetworksofengineeringassetsareanessentialbaseofanation'senergyresourceinfrastructure.Thisresearchidentifiesthekeyfactorsinfluencingtransformernormaloperatingconditionsandpredictstheassetmanagementlifespan.Engineeringassetresearchhasdevelopedfewlifespanforecastingmethodscombiningreal-timemonitoringsolutionsfortransformermaintenanceandreplacement.Utilizingtherichdatasourcefromaremoteterminalunit(RTU)systemforsensor-datadrivenanalysis,thisresearchdevelopsaninnovativereal-timelifespanforecastingapproachapplyinglogisticregressionbasedontheWeibulldistribution.Themethodologyandtheimplementationprototypeareverifiedusingadataseriesfrom161kVtransformerstoevaluatetheefficiencyandaccuracyforenergysectorapplications.Theassetstakeholdersandsupplierssignificantlybenefitfromthereal-timepowertransformerlifespanevaluationformaintenanceandreplacementdecisionsupport.
简介:Thepropertiesofaseriesofphasemeasurementtechniques,includinginterferometry,theHartmann–Shackwavefrontsensor,theknife-edgetechnique,andcoherentdiffractionimaging,aresummarizedandtheirperformanceinhighpowerlaserapplicationsiscompared.Theadvantages,disadvantages,andapplicationrangesofeachtechniquearediscussed.
简介:Inthispaper,addedresistancesactingonahullofnonballastwatership(NBS)inhighwavesisdiscussed.ThenonballastwatershipsweredevelopedatthelaboratoryoftheauthorsatOsakaPrefectureUniversity,Japan.Inthepresentpaper,theperformancesofthreekindsofbowshapesdevelopedfortheNBSweretheoreticallyandexperimentallyinvestigatedtofindthebestoneinhighwaves.Inpreviouspapers,anoptimumbowshapefortheNBSwasdevelopedincalmwaterandinmoderatedwaves.Fora2mmodelforexperimentsandcomputations,thewaveheightis0.02m.Thismeansthatthewaveheightis15%ofthedraftoftheshipinfullloadconditions.Inthispaper,addedresistancesinhighwavesupto0.07mfora2mmodelor53%ofthefullloaddraftareinvestigated.Insuchhighwaveslinearwavetheorieswhichhavebeenusedinthedesignstageofashipforalongtimemaynotworkwellanymore,andexperimentsaretheonlyeffectivetooltopredicttheaddedresistanceinhighwaves.Withthecomputationsforwaves,theshipisinafullycapturedconditionbecauseshorterwaves,λ/Lpp〈0.6,areassumed.
简介:聚氨酯,是在论文介绍的组成的研究的题目,基于Bayer生产的oligocarbonatediolsDesmophenC2100?。组成的建模考虑到作为intervertebral圆盘prostheses的inlay使用材料被执行。聚氨酯被假定是非线性地viscohyperelastic,各向同性、不可压缩。组成的方程从要求的紧张精力功能被导出。橡皮和rheological常数根据试验性的测试被识别,即松驰测试和monotonic以二不同紧张率的单轴的测试,即\(\dot\lambda=0.1\)min1和\(\dot\lambda=1.0\)min1。僵硬张肌被导出并且介绍给Abaqus吗?有限元素(FE)软件以便数字地验证组成的模型。常数鉴定和数字实现的结果证明导出的组成的方程是充分足够的为聚氨酯材料的压力紧张行为建模。
简介:Inthispaperweconsiderlaserintensitiesgreaterthan1016Wcm-2wheretheablationpressureisnegligibleincomparisonwiththeradiationpressure.Theradiationpressureiscausedbytheponderomotiveforceactingmainlyontheelectronsthatareseparatedfromtheionstocreateadoublelayer(DL).ThisDLisacceleratedintothetarget,likeapistonthatpushesthematterinsuchawaythatashockwaveiscreated.Herewediscusstwonovelideas.Firstly,thetransitiondomainbetweentherelativisticandnon-relativisticlaser-inducedshockwaves.Oursolutionisbasedonrelativistichydrodynamicsalsofortheabovetransitiondomain.Therelativisticshockwaveparameters,suchascompression,pressure,shockwaveandparticleflowvelocities,soundvelocityandrarefactionwavevelocityinthecompressedtarget,andtemperaturearecalculated.Secondly,wewouldliketousethistransitiondomainforshockwave-inducedultrafastignitionofapre-compressedtarget.Thelaserparametersforthesepurposesarecalculatedandthemainadvantagesofthisschemearedescribed.Ifthisschemeissuccessfulanewsourceofenergyinlargequantitiesmaybecomefeasible.
简介:Thispaperreviewsthedifferentchallengesthatareencounteredinthedeliveryofhighpowerlasersasdriversforfusionenergy.Wewillfocusondiode-pumpedsolid-statelasersandwewillhighlightsomeofthemainrecentachievementswhenusingytterbium,cryogeniccoolingandceramicgainmedia.Apartfromsomeexistingfusionfacilitiesandsomemilitaryapplicationsofdiode-pumpedsolid-statelasers,wewillshowthatdiode-pumpedsolid-statelasersarescalabletoinertialfusionenergy(IFE)’sfacilitylevelandthattheall-fiberlaserschemeisverypromising.
简介:Thequestforenergyefficiencyhasgrowingimportanceinhighperformancemany-coresystems.However,incurrentpractices,thepowerslacks,whicharethedifferencesobservedbetweentheinputpowerbudgetandtheactualpowerconsumedinthemany-coresystems,aretypicallyignored,thusleadingtopoorenergyefficiency.Inthispaper,weproposeaschemetoeffectivelypowertheon-chipcommunicationsbyexploitingtheavailablepowerslackthatistotallywastedincurrentmany-coresystems.Asso,thedemandforextraenergyfromexternalpowersources(e.g.,batteries)isminimized,whichhelpsimprovetheoverallenergyefficiency.Inessence,thepowerslackisstoredateachnodeandtheproposedroutingalgorithmusesadynamicprogrammingnetworktofindthegloballyoptimalpath,alongwhichthetotalenergystoredonthenodesisthemaximum.Experimentalresultshaveconfirmedthattheproposedscheme,withlowhardwareoverhead,canreducelatencyandextraenergyconsumptionby44%and48%,respectively,comparedwiththetwocompetingroutingmethods.IndexTerms?Adaptiverouting,dynamic
简介:Accuratepredictionofwindpowerissignificantforpowersystemdispatchingaswellassafeandstableoperation.BymeansofBPneuralnetwork,radialbasisfunctionneuralnetworkandsupportvectormachine,anewcombinedmethodofwindpowerpredictionbasedoncooperativegametheoryisproposed.Inthemethod,everysingleforecastingmodelisregardedasamemberofthecooperativegames,andthesumofsquareerrorofcombinationforecastingistakenastheresultofcooperation.TheresultisdividedamongthemembersaccordingtoShapleyvalues,andthenweightsofcombinationforecastingcanbeobtained.Applicationresultsinanactualwindfarmshowthattheproposedmethodcaneffectivelyimprovepredictionprecision.
简介:Amethodofdetectingdry,icyandwetroadsurfaceconditionsbasedonscanningdetectionofsinglewavelengthbackwardpowerisproposedinthisletter.Thedetectorisusedtoreceivethebackwardscatteredpowerwhichchangeswiththeincidenceangle.Therelationshipbetweenbackwardpowerandincidenceangleisusedtofindouttheeffectiveanglerangeanddistinguishmethod.Experimentandsimulationshowthatitisfeasibletoclassifythesethreeconditionswithinincidenceangleof5.3degree.
简介:Amongthecomponentsonamany-corechip,network-on-chip(NoC)hasalreadycontributedalargeportiontooverallpowerconsumption.OptimizingNoCperformanceunderagivenpowerbudgetisfurthercomplicatedtokeepthenetworkconnectivityandminimizethedetourdistances.Inthispaper,aNoCpowerbudgetingmethodfromthecommunicationperspectiveisproposed,whichintelligentlypowersoffrouters/linksandsetsupalternativepathstorestrictthepowerandthermalenvelop.Theeffectofperformanceoptimizaionoftheproposedpowerbudgetingmothodismeasuredbasedonlatencyandinthegivenpowerbudget,22%latencycanbereducedaveragelycomparedwithsomecompetingmethodswhenrunningrealbenchmarks.
简介:AIM:Toexaminetheintegrityoftheocularsurfacesofsubjectswithandwithoutdiabeteswithnoconjunctivalanddryeyesignsandsymptomsandcompareconjunctivalimpressioncytologyfindingsindiabeticswithnon-proliferativeandproliferativediabeticretinopathy.METHODS:Conjunctivalimpressioncytologywasperformedon43eyesof43subjectswithnonproliferativediabeticretinopathy(NPDR),42eyesof42subjectswithproliferativediabeticretinopathy(PDR),and30eyesof30controlsubjects.Impressioncytologyspecimensofeachgroupweregradedandscoredintherange0-3accordingtoNelson’smethod.RESULTS:Therewere45(52.9%)womenand40(47.1%)men.Themeanageofthepatientswas59.6±9.3y(range,43-76y)inNPDRgroupand58.0±8.8y(range,41-85y)inPDRgroup.CaseswithNPDRandPDRshowedstatisticallysignificanthigherimpressioncytologyscoresthancontrolgroup(P<0.05).TherewasnodifferencebetweentheNPDRandPDRpatientsforimpressioncytologygradingscores.CONCLUSION:ItisdeterminedthatimpressioncytologygradesarealteredinpatientswithNPDRandPDR.Consequently,wesuggestthattheremightbeanassociationbetweentheimpressioncytologygradingscoresandtheseverityofdiabeticretinopathy
简介:Overthepastfewdecades,non-alcoholicfattyliverdisease(NAFLD)hasbecomeone,ifnotthemostcommon,causeofchronicliverdiseaseaffectingbothadultsandchildren.Theincreasingnumberofcasesatanearlyageisthemostworryingaspectofthispathology,sinceitprovidesmoretimeforitsevolution.Thespectrumofthisdiseaserangesfromliversteatosistosteatohepatitis,fibrosisandinsomecases,hepatocellularcarcinoma.NAFLDmaynotalwaysbeconsideredabenigndiseaseandhepatologistsmustbecautiousinthepresenceoffattyliver.Thisshouldprompttheuseoftheavailableexperimentalmodelstounderstandbetterthepathogenesisandtodeveloparationaltreatmentofadiseasethatisdangerouslyincreasing.Inspiteofthegrowingefforts,thepathogenesisofNAFLDisstillpoorlyunderstood.InthepresentarticlewereviewthemostrelevanthypothesesandevidencethataccountfortheprogressionofNAFLDtonon-alcoholicsteatohepatitis(NASH)andfibrosis.TheavailableinvitroandinvivoexperimentalmodelsofNASHarediscussedandrevisedintermsoftheirvalidityintranslationalstudies.Thesestudiesmustbeaimedatthediscoveryofthestillunknowntriggersormediatorsthatinducetheprogressionofhepaticinflammation,apoptosisandfibrosis.
简介:Lowpowerconsumptionisamajorissueinnowadayselectronicssystems.ThistrendispushedbythedevelopmentofdatacenterrelatedtocloudservicesandsoontotheInternetofThings(IoT)deployment.Memoriesareoneofthemajorcontributorstopowerconsumption.However,thedevelopmentofemergingmemorytechnologiespavesthewaytolow-powerdesign,throughthepartialreplacementofthedynamicrandomaccessmemory(DRAM)withthenon-volatilestand-alonememoryinserversorwiththeembeddedordistributedemergingnon-volatilememoryinIoTobjects.Inthelattercase,non-volatileflip-flops(NVFFs)seemapromisingcandidatetoreplacetheretentionlatch.Indeed,IoTobjectspresentlongsleeptimeandNVFFsoffertosavedatainregisterswithzeropowerwhentheapplicationisidle.ThispapergivesanoverviewofNVFFarchitectureflavorsforvariousemergingmemorytechnologies.