简介:Usingthesingleparticletheoryandthenon--flexibilitycollisionmodelofelectronandphoton,theinfluenceoftheuncapturedelectronsontheenergyconversionefficiencyofmulti--photonnonlinearComptonscatteringintheextrastationarylaser--plasmaisinvestigated.Itshowsthatinextrastationarylaser—plasma,theuncapturedelectronsmaketheAtoofthescatteringfrequencyofthemulti--photonComptonfalldownwiththeincreasesoftheincidentradiationelectronspeed,thematerialsoftheincidentcollisionofelectronandphoton,andthenumberofthephotonswhichworkwiththeelectronsatthesametime.Underthemodulationoftheuncapturedelectronstothelaserfield,theenergyconversionefficiencybetweenelectronsandphotonswillfalldownwiththeincreaseoftheelectronincidentradiationspeed,usingthelow--powerelectronsforincidentsource,thelosscanbeefficientlyreduced.
简介:Themediumaccesscontrol(MAC)protocolforindoorvisiblelightcommunication(VLC)withenergyharvestingisexploredinthispaper.Theunfairnessofthroughputexistsamongdevicesduetothesignificantdifferenceoftheirenergyharvestingrateswhichchangeswithdistance,acceptanceangleandtheobstructionprobability.Weproposeanenergyharvestingmodel,anewobstructionprobabilitymodelandanenergyadaptivecontentionalgorithmtoovercometheunfairnessproblem.Thisdevicecanadjustitscontentionwindowaccordingtotheenergyharvestingrate.Asaresult,thedevicewithlowerenergyharvestingratecangetshortercontentionwindowtoimproveitstransmissionopportunity.SimulationresultsshowthatourMACprotocolcanachieveahigherdegreeoffairness.
简介:Sincedecades,theglobalelectricitydemandshowsonlyonedirection:aconsiderableconstantincreaseeveryyear.Buttheunlimitedgrowthinenergyconsumptionisdiscussedincreasinglycritical,notonlyprimarilyintermsoflimitationsbutalsointermsofmoreefficient,moreintelligent,andmoresustainableusageofenergy.Energy-efficienttechnologies(EET)andrenewableenergy
简介:AftertheFukushimadisaster,Europeanpoliticiansbegantoreassesstheenergystrategyfortheircountries.Thefocusisnowonrenewableenergysourcesandasaresultondecentralization.Thedecentralizedgeneration,storage,andofcoursetheconsumptionofenergyisthecentralpoint.Nowwiththenewdevelopmentsundertheroofofenergyturnaroundthewaybackfromthecentralizedarchitectureofourenergysystemtoamoredecentralizedoneispredetermined.Decentralizationimpliesthechangeintheroleoftoday’sconsumers.Theybecomeenergyprosumers.Thisisthebasisforthecrowdenergyconcept.Inthispositionpaperthecrowdenergyconceptisintroducedandnecessaryresearchfieldsareidentified.
简介:SmartlivinglabssuchastheonelocatedinFribourg(Switzerland)focusonimprovingwellbeingandfurtheringknowledgerelatedtobuildingthedistrictofthefutureonatechnicalandsociallevel.Therefore,smartlivinglabsrepresentanexperimentalplatform/spacewheresustainableproductionandconsumptionstrategiescanbetestedinaprotectedenvironment.Asignificantchangeinthesocioeconomicproductionandconsumptionspherecanbeexpectedbytheriseoftheso-calledenergyprosumer.Accordingly,thisarticlepresentsaninteractivemodelfortheexperimentalinvestigationofenergyprosumerbehavior.Inthiscontext,twopotentialexperimentsoninvestmentandtradedecisionsarebrieflyoutlined.Since(behavioralandeconomic)experimentsareusuallyconductedundercontrolledconditionsinexperimentallabsinvolvingmainlyundergraduatestudents,thepresentedinteractivemodelisflexibleandmobile,providingtheadvantagetoconductexperimentsnearlyeverywhereinvolvingeverydaycitizens.
简介:Digitaltransformationgenerallyreferstotheprocessofchangeinbusinessandsociety,basedontheomnipresenceofsensors,networks,information,andcommunicationtechnology.Evershorterdevelopmentandinnovationcyclesareacharacteristicfeatureofthisprocess,whichiscurrentlyinfluencingallindustriesandallareasoflife,beitindustrialproduction,trade,transport,healthcare,oreducation.Theubiquityofdigitaltechnologyleadstoprofoundpolitical,economic,andsocialchanges,butalsotomultifacetedinnovations.
简介:Thedisruptionofdigitaltechnologieshasbeenarealityinmanydifferentindustrialsectorsformanyyears.Thedigitaltransformationisnowhavinganincreasingimpactontheenergysectoraswellastheso-called“smartenvironments”,e.g.bottom-to-bottomenergyprovisionmodels(crowdenergy)arenolongerjusttheorybutreality.Thedigitalagendaisdrivenbythecombineduseofaffordablesensorsandinformationandcommunicationstechnology(SICT).
简介:GuestEditorProf.Dr.StephanieTeufelUniversityofFribourgstephanie.teufel@unifr.chFromenergygenerationtotransportation,fromenergydistributiontostorage,fromsemiconductorprocessingtocommunications,andfromportabledevicestodatacenters,energyconsumptionhasgrowntobeamajorlimitationtousability
简介:Sincedecades,theglobalelectricitydemandshowsonlyonedirection:aconsiderableconstantincreaseeveryyear.Buttheunlimitedgrowthinenergyconsumptionisdiscussedincreasinglycritical,notonlyprimarilyintermsoflimitationsbutalsointermsofmoreefficient,moreintelligent,andmoresustainableusageofenergy.Energy-efficienttechnologies(EET)andrenewableenergytechnologiesarealreadyinacompetitivepositionindifferentmarkets,andtheyarealsoactively
简介:Anovellowpowerandlowvoltagecurrentmirrorwithaverylowcurrentcopyerrorispresentedandtheprincipleofitsoperationisdiscussed.Inthiscircuit,thegainboostingregulatedcascodeschemeisusedtoimprovetheoutputresistance,whileusinginverterasanamplifier.ThesimulationresultswithHSPICEinTSMC0.18umCMOStechnologyaregiven,whichverifythehighperformanceoftheproposedstructure.Simulationresultsshowaninputresistanceof0.014Ωandanoutputresistanceof3GΩ.Thecurrentcopyerrorisfavorableaslowas0.002%togetherwithaninput(theminimuminputvoltageofvin,min~0.24V)andanoutput(theminimumoutputvoltageofvout,min~0.16V)complianceswhileworkingwiththe1Vpowersupplyandthe50uAinputcurrent.Thecurrentcopyerrorisnearzeroattheinputcurrentof27uA.Itconsumesonly76uWandintroducesaverylowoutputoffsetcurrentof50pA.
简介:对数的反应互补金属氧化物半导体(互补金属氧化物半导体)图象传感器提供一个宽动态范围,但是它的缺点是简单固定模式噪音(FPN)的缺乏取消计划。设计与高有活力的范围和高输出秋千是一个新奇对数的活跃象素传感器(APS)。第一,混合模型APS的操作原则被介绍。象素能由选择合适的控制信号在三个操作模式工作。然后,对数的APS的FPN来源被分析,并且双sampled技术被实现减少FPN。根据模拟结果,最后,布局被设计并且过去了设计统治支票(DRC),电子规则检查(ERC)和布局对图解(LVS)确认,和模拟以后的结果是基本上与模拟结果一致。新对数的APS的动态范围能到达大约140dB;并且产量秋千是大约750mV。结果证明由使用两倍取样的技术,大多数FPN被消除,动态范围被提高。
简介:Changingbehavioursandattitudestowardsmoresustainableindividualenergyconsumptionisadifficulttopictoaddress.Afteridentifyingthemostrecurrentfactorsinfluencingthebadenergyconsumption,society’senvironmentalshort-sightedness,alackofindividualresponsibilityandatendencytoputresponsibilityuponfirms,institutions,andgovernments,theauthorsevaluatedtheeffectthatbusinesspracticescanhaveonindividualbehaviour.Byqualifyingashighlycrediblesourcesofinformation,positioningthemselvesasexamplestofollow,andprovidingitsemployeeswiththenecessarysmartandinnovativetechnology,businesscommunitiescanhaveamajorimpactonchangingindividualbehaviourstowardsmoresustainableenergyconsumption.
简介:Thetwo-dimensionalnumericalsimulationofenergytransportforMOSFETsispresented,inwhichtheeffectofgeneration,recombinationandtemperaturegradientofcarriersonthecharacteristicsofdevicesareconsidered.Animprovedmobilitymodelisalsoproposed.ThenumericalresultsofmicronandsubmicronMOSFETsshowthatthepresentmodelfitsexperimentverywell.
简介:Thispaperreportsawind-poweredwaterpumpingsystemimplementedinruralsideofPakistan.ThedesignmethodologypresentedinthispapershallenhancetheefficiencyoftheexistingSavoniusturbine’sperformancebymodifyingitaerodynamically.BladeswithdifferenttwistanglesaredesignedinSolidEdgeandanalyzedusingcomputationalfluiddynamics(CFD)withANSYSFLUENTsoftware.Staticandrotationalanalysesareperformedtogetoptimizedtwistangleandresultsarehighlighted.Theperformancesoftheturbineinbothstaticandrotationalanalysesarecompared.
简介:Thispaperpresentsthedesign,implementationandtestingofanembeddedsystemthatintegratessolarandstorageenergyresourcestosmarthomeswithinthesmartmicrogrid.Theproposedsystemprovidestherequiredhomeenergybyinstallingrenewableenergyandstoragedevices.Italsomanagesandschedulesthepowerflowduringpeakandoff-peakperiods.Inaddition,atwo-waycommunicationprotocolisdevelopedtoenablethehomeownersandtheutilityserviceprovidertoimprovetheenergyflowandtheconsumptionefficiency.Thesystemcanbeanintegralpartforhomesinasmartgridorsmartmicrogridpowernetworks.Aprototypefortheproposedsystemwasdesigned,implementedandtestedbyusingacontrolledloadbanktosimulateascaledrandomrealhouseconsumptionbehavior.Threedifferentscenariosweretestedandtheresultsandfindingsarereported.Moreover,dataflowsecurityamongthehome,homeownersandutilityserverisdevelopedtominimizecyber-attacks.
简介:AnanalyticalmodelhasbeendevelopedtostudyinversionlayerquantizationintheultrathinoxideMOS(metaloxidesemiconductor)structuresusingvariationandtriangularwellapproaches.Accuratemodelingoftheinversionchargedensityusingthecontinuoussurfacepotentialequationshasbeendone.Noapproximationhasbeentakentomodeltheinversionlayerquantizationprocess.TheresultsshowthatthevariationapproachdescribesinversionlayerquantizationprocessaccuratelyasitmatcheswellwiththeBSIM5(Berkeleyshortchannelinsulatedgatefieldeffecttransistormodel5)resultsmorecloselycomparedwithtriangularwellapproach.