简介：Inthispaper,wepresentahighspeedautofocussystemformicrosystemapplicationsanddesignalook-up-tablebasedautofocusingalgorithmforapplicationswhenatargetobjectisalwaysvisible,e.g.,manufacturingpartswithalignmentfiducials.Weperformanevaluationof24focusmeasurestoverifythatwhichfocusmeasureisthebestforthelook-up-tablebasedmethod.Fromtheevaluation,wefindthattheChebyshevmoments-basedfocusmeasure(CHEB)isthemostsuitable.Furthermore,wealsodevelopalook-up-tablebasedautofocussystemthatusesCHEBasthefocusmeasure.Intrainingphase,weofflineconstructatablefromtrainingimagesofanobjectthatarecapturedatseverallensdistances.Eachentryoftableconsistsoffocusmeasurecomputedfromimageandlensdistance.Inworkingphase,givenaninputimage,thealgorithmfirstcomputesthefocusmeasureandthenfindsthebestmatchfocusmeasurefromthetableandlooksupthecorrespondinglenspositionformovingitintothein-focusposition.Ouralgorithmcanperformautofocusingwithinonly2stepsoflensmoving.Theexperimentshowsthatthesystemcanperformhighspeedautofocusingofmicroobjects.

简介：Fromseveralmodelsaboutdamagemechanis,thedamagemecanismofopticalfilmsandthefactorswhichaffectthedamagethresholdaredescribedexperi-mentallyandtheoretically.Somereasonableproposalsaregivenisthispaperonhowtoselectthehigh-thresholdfimls.

简介：Withthedevelopmentofsmartgrid,residentshavetheopportunitytoscheduletheirhouseholdappliances(HA)forthepurposeofreducingelectricityexpensesandalleviatingthepressureofthesmartgrid.Inthispaper,weintroducethestructureofhomeenergymanagementsystem(EMS)andthenproposeapoweroptimizationstrategybasedonhouseholdloadmodelandelectricvehicle(EV)modelforhomepowerusage.Inthisstrategy,theelectricvehiclesarechargedwhenthepriceislow,andotherwise,aredischarged.Byadoptingthiscombinedsystemmodelunderthetime-of-useelectricityprice(TOUP),theproposedschedulingstrategywouldeffectivelyminimizetheelectricitycostandreducethepressureofthesmartgridatthesametime.Finally,simulationexperimentsarecarriedouttoshowthefeasibilityoftheproposedstrategy.Theresultsshowthatcrossovergeneticparticleswarmoptimizationalgorithmhasbetterconvergencepropertiesthantraditionalparticleswarmalgorithmandbetteradaptabilitythangeneticalgorithm.

简介：Theintensityandphaseformulasthatarevalidforthesaturationandinter-mediateregime(beforesaturation)arederived,andtheanalyticalexpressionswiththerationofsaturationintensitytototalincidentintensityastheirexplicitvariableareobtanied.Theintensitydepenenceofstationaryenergytransferinphotorefractiveacodirectionaltwo-wavemixingisexamined.Itisnecessarytousingtheseformulasinsomeproblems,suchasthetemperatureofintensitydependenceoftwo-wavemixing.Amethodofmeasuringexponen-tialgaincoefficientispresented,whichissuitablefortwo-wavemixinginintermediateregime.

简介：ThisSpecialSectiononEnergy,Materials,andNanotechnology(EMN),JournalofElectronicScienceandTechnology(JEST),presentsabroadrangeofinterdisciplinaryandmultidisciplinaryresearchintocutting-edgescientificconceptstowardsmaterialssynthesis,characterization,andnoveltechnologydevelopments.

简介：Inrecentyears,thepotentialofrenewablegreenenergysourceshasbeenextensivelystudied.Theproventechnologywhichisphotovoltaicsolarcellsstrictlydependsondaylightandproduceslow-efficiently.Toovercometherestrictions,onetechnologystudiedisthroughharvestingthethermalradiationenergywhichcanprovidea24-hourenergysource.Thecontinuityofenergysourcespromisesverygoodenergyconversionespeciallyformilitaryapplications.Thisarticlepresentsanewstructurethatcanharvesttheabundantthermalradiationenergyintousableenergyatthewavelengthof10μm.Arectangularstructurewithaperturbationslitwasdesignedtointegratewitharectifiercircuitforgreenenergyconversion.Theslittunneljunctionguidedtheelectromagneticfieldintoajunctionwheretheenergycouldbecollectedandconverted.Anenhancementfactorofapproximately110.6canbeachievedbyaperturbationslitlengthof1.0μm.Theresultsextractedfromtheproposeddesignpromiseabettercandidatetoovercomethedisadvantagesofphotovoltaicsolarcellsforenergyharvestingdevices.

简介：AccordingtotheprincipleofpolarizationimagingandtherelationbetweenStokesparametersandthedegreeoflinearpolarization,therearemuchredundantandcomplementaryinformationinpolarizedimages.Sinceman-madeobjectsandnaturalobjectscanbeeasilydistinguishedinimagesofdegreeoflinearpolarizationandimagesofStokesparameterscontainrichdetailedinformationofthescene,thecluttersintheimagescanberemovedefficientlywhilethedetailedinformationcanbemaintainedbycombiningtheseimages.Analgorithmofadaptivepolarizationimagefusionbasedonregionalenergydynamicweightedaverageisproposedinthispapertocombinetheseimages.Throughanexperimentandsimulations,mostcluttersareremovedbythisalgorithm.Thefusionmethodisusedfordifferentlightconditionsinsimulation,andtheinfluenceoflightingconditionsonthefusionresultsisanalyzed.

简介：

简介：PN(Pseudo-Noise)codetrackingisthemostchallengingtaskinaDirectSequenceSpreadCodeDivisionMultiplexAccess(DS-CDMA)forcelluarmobilecommunicationsystems.Inthispaper,thegravityofenergywindows(GEW)trackingloopofthetimeandfrequencyuncertaintyofthereceivedsignalisinvestigated,andtheGEW’sanalyticalresultsinamulti-pathfadingchannelareintroduced.GEWtrackingloopexploitstheinherentmulti-pathdiversityofthechannel,andhasbetterperformancethansingle-pathonewhenworkinginmulti-pathfadingenvironment.

简介：Thispaperfocusesontheissueofcollaborativespectrumsensingincognitiveultrawideband(CUWB)impulseradio.Weemployenergy-basedsignaldetectionmethodandapplytheNeyman-Pearson(NP)decisionruletodeterminetheoptimumthreshold.Twocooperativespectrumsensingschemesaredevelopedinthispaper.Thedecisionfusionschemeisbasedonharddecision,inwhicheachcooperatingcognitiveuser(CU)sendsitsownlocaldecisiontothefusioncenter(FC).TheFCthenmakesafinaldecisionaccordingtothemajorityvotingrule.Alternatively,thedatafusionschemeisbasedonsoftdecision,inwhicheachlocalCUsendsitsobservedvaluedirectlytotheFC.TheFCcombinesthesevalues,comparestoathresholdandthenmakesthefinaldecision.Theperformancesofbothschemesarestudiedbyusinganalyticaltoolsandcomputersimulations.Thereceiveroperatingcharacteristics(ROC),whichrevealtheprobabilityofdetectionversusfalse-alarmcurve,areemployedtoevaluatethesystemperformanceunderdifferentscenarios.SimulationresultsdemonstratethatthedatafusionschemeoutperformsthedecisionfusionschemeandverifythatthecollaborativespectrumsensinghaspracticalimportanceinCUWBnetworks.

简介：Inthispaper,wepresentanovelregion-basedactivecontourmodelbasedonglobalin-tensityfittingenergyinavariationallevelsetframework.Meanwhile,aninternalenergytermisin-troduced,anditforcesthelevelsetfunctiontobeclosetoasigneddistancefunction.Imageglobalinformationutilizedefficientlymakestheproposedmodelinsensitivetonoise,andtheintroducedpenaltytermcanavoidthecostlyre-initializationfortheevolvinglevelsetfunction,whichnotonlyspeedsupthecontourevolvement,butalsoimprovesaccuracyofthefinalcontour.Comparisonswithotherclassicalregion-basedmodels,suchasChan-VesemodelandRegion-ScalableFitting(RSF)model,showtheadvantagesofourmodelintermsofefficiencyandaccuracy.Moreover,themodelisrobusttonoise.

简介：Inthisresearch,acontent-basedimageretrieval(CBIR)systemforhighresolutionsatelliteimageshasbeendevelopedbyusingtexturefeatures.Theproposedapproachusesthelocalbinarypattern(LBP)texturefeatureandablockbasedscheme.Thequeryanddatabaseimagesaredividedintoequallysizedblocks,fromwhichLBPhistogramsareextracted.TheblockhistogramsarethencomparedbyusingtheChi-squaredistance.ExperimentalresultsshowthattheLBPrepresentationprovidesapowerfultoolforhighresolutionsatelliteimages(HRSI)retrieval.

简介：Thepurposeofthispaperistodevelopahighspeeddetectionschemeformovingand/orstationarypointtargetsinamultitargetenvironmentasregisteredinanIRimagesequence.Aniterativeapproximate3-Dlinesearchingalgorithmbaseduponthegeometricrepresentationoflines(fornon-maneuveringtargetsinspace)ina3-Dspaceisderived.Theconvergencyofthealgorithmisproved.Ananalysisisperformedofthetheoreticaldetectionperformanceofthealgorithm.ThestatisticalexperimentresultsshowhigheffectivenessandcomputationalefficiencyofthealgorithminthecaseoflowSNR.Theideamaybeemployedtosatisfythereal-timeprocessingrequirementofanIRsystem.

简介：Thehighresolutionradartargetdetectionisaddressedinthenon-Gaussianclutter.Anadaptivedetectorisderivedforrange-spreadtargetbasedonanovelcovariancematrixestimator.Itisprovedthatthenewdetectorisconstantfalsealarmrate(CFAR)tobothofthecluttercovariancematrixstructureandpowerleveltheoreticallyformatchcases.ThesimulationresultsshowthatthenewdetectorisalmostCFARformismatchcases,anditoutperformstheexistingadaptivedetectorbasedonthesamplecovariancematrix.Italsoshowsthatthedetectionperformanceimproves,asthenumberofpulses,thenumberofsecondarydataortheclutterspikeincreases.Inaddition,thederiveddetectorisrobusttodifferentsubsets,estimatedcluttergroupsizesandcorrelationsofclutter.Importantly,thenumberofiterationsforpracticalapplicationisjustone.

简介：热管理是为射出二极管的高力量的光的关键技术之一(带)进入一般照亮域。成功的热管理取决于最佳的包装结构和选择包装材料。在这份报纸，铝作为底层被采用带，3

简介：Theprincipleofnewopticalfibrepressuretransducerisanalysed,andinge-niousdesignschemeofthistransducerisvigen.Thisnewtransducerspecimenisprovidedwithfollowingcharacteristics;experimentaltransmittingdistanceis20m(actuallyupto1000m);systemsensitivityis0.1mV/Pa;powerconsumptionoftheprobeislessthan125μW.Finally,somepointsoftheappraisementaregiveninthispaper.

简介：Inthispaper,theoperationprincipleoflaserrotaryencodersisexpoundedandtheopticalquadruplefrequencytechnologyusedinlaserrotaryencodersinex-plained,andthedesignideaofopticalsysteminΦ66mmlaserrotaryencoderismainlyintroduced,aswellasthechoiceofprincipaldevices.

简介：Inpracticalapplications,weoftenhavetodealwithhigh-orderdata,forexample,agrayscaleimageandavideoclipareintrinsicallya2nd-ordertensoranda3rd-ordertensor,respectively.Inordertosatistythesehigh-orderdata,itisconventionaltovectorizethesedatainadvance,whichoftendestroystheintrinsicstructuresofthedataandincludesthecurseofdimensionality.Forthisreason,weconsidertheproblemofhigh-orderdatarepresentationandclassification,andproposeatensorbasedfisherdiscriminantanalysis(FDA),whichisageneralizedversionofFDA,namedasGFDA.ExperimentalresultsshowourGFDAoutperformstheexistingmethods,suchasthe2-directional2-dimensionalprincipalcomponentanalysis((2D)2PCA),2-directional2-dimensionallineardiscriminantanalysis((2D)2LDA),andmultilineardiscriminantanalysis(MDA),inhigh-orderdataclassificationunderalowercompressionratio.

简介：Throughexperimentsandcomputersimulation,theinfluenceoftheenergylevelsoforganicmaterialsandelectrodematerialsintheorganiclight-emittingdiodes(OLEDs)onthedeviceperformancesisdiscussed.Resultsshowthatthedeviceperformancesareinfluencedbynotonlythecarrierinjectionbarriersattheelectrodeinterfacebutalsothebarriersattheorganicheterojunctioninterface.ThisresultishelpfultotheselectionoftheorganicmaterialsandtheirarrangementintheoptimaldesignofOLEDs.

简介：Ionimplantationmayfavorablymodifythepropertiesofpolyaniline/Siheterojunctionsolarcellsfabricatedbytheelectrochemicalmethod.Influencesoftheimplantationontheabsorptionspectrumandthethermalstabilitywerediscussedandoutputpropertiesweremeasured.Theresultsshowthattheabsorptionspectrumofthepolyanilinefilmsmodifiedbyionimplantationismuchwider;itspyrolytictemperatureincreasesby40℃,andthepolyaniline/Sicellefficiencyincreases18and3timesundertheilluminationof10.92and37.2W/m2,respectively.