简介：Inordertoachievetheinformationfusioninthetimedomainbasedontheevidencetheory,anevidencecombinationmethodinthetimedomainbasedonreliabilityandimportanceisproposedaccordingtotheideaofevidencediscount.Firstly,thedistortionofthetime-domainevidenceisjudgedbasedonsingleexponentialsmoothing.Thereal-timereliabilityoftheevidenceattheadjacenttimeisobtainedbythereal-timereliabilityassessmentmethodoftheevidencebasedonthecredibilitydecaymodel.Then,therelativeimportanceoftheevidenceattheadjacenttimeisobtainedbycomprehensivelyconsideringimprovedconflictdegreeanduncertainty.Finally,basedonthecriterionofevidencediscountandtheDempster’sruleofcombination,theevidencecombinationiscarriedouttoachievethesequentialcombinationoftime-domainevidence.Thenumericalsimulationandanalysisshowthatthismethodhasfullyembodiedthedynamiccharacteristicsoftime-domainevidencecombination,andithasstrongprocessingabilityforconflictinformationandanti-disturbingability.Theproposedmethodhasgoodapplicabilitytoinformationfusioninthetimedomain.

简介：Anoveltextindependentspeakeridentificationsystemisproposed.Intheproposedsystem,the12-orderperceptuallinearpredictivecepstrumandtheirdeltacoefficientsinthespanoffiveframesareextractedfromthesegmentedspeechbasedonthemethodofpitchsynchronousanalysis.TheFisherratiosoftheoriginalcoefficientsthenbecalculated,andthecoefficientswhoseFisherratiosarebiggerareselectedtoformthe13-dimensionalfeaturevectorsofspeaker.TheGaussianmixturemodelisusedtomodelthespeakers.TheexperimentalresultsshowthattheidentificationaccuracyoftheproposedsystemisobviouslybetterthanthatofthesystemsbasedonotherconventionalcoefficientslikethelinearpredictivecepstralcoefficientsandtheMel-frequencycepstralcoefficients.

简介：Anon-axisholographiczoneplateoranoff-axisholographiczoneplateusedforthesiliconsolarcellwillhaveasolarenergyconversionfactorof2.5.Andthecombinationofthetwoplateswillhaveitsconversionfacftorof5.Especiallyfortheuseofsilverhalidephotographicemulsion,thecostcanbecutdowndramatically.

简介：栅栏的衍射效率支离破碎的纤维激光横梁联合尽最大努力起一个重要作用。通过理论上的分析和数字模拟，衍射效率将与栅栏频率和波长带宽的减少增加，这被证明了。在一个纤维数组的宽度在W=10厘米被修理的条件上，最佳栅栏频率数字地作为f=230公里被模仿?1。另外，一个不相等的间隔方法被建议改进衍射的系统效率进0.4293，它在相等的间隔条件下面比0.3824高。CLC数字TN253由中国(60678018)的国家自然科学基础支持了

简介：Inthispaper,theerenkovradiationoflightpulseinamicroringandgratingsissimulatedandinvestigated.Thesystemdesignconsistsofatwo-defectgratingincorporatingamicroring,connectedwithauniformgrating.Insimulation,thecontinuouswave(CW)lightpulsewithwavelengthcenteredat1.55μmisinputintothemicroringdeviceviathetwo-defectgrating.Theresonantoutputsfromthetwo-defectgratingpropagatethroughthemicroringanduniformgrating,wherethetimedelaysofthosetwoinputpulseswithdifferentwavelengthsthroughthesystemaredistinguishedbytheoutputuniformgrating.Fromtheobtainedresonantoutputpulses,wefindthatthered-shiftedandblue-shiftederenkovpulsesareobserved.Inapplications,suchaproposedsystemcanbeusedtoformtwodifferentopticaldelaypulses,inwhichthechangeinerenkovradiationofthem,i.e.,timedelaywithinamicroringdevicesystem,canbeusefulforerenkovradiationimagingandsensingapplications.

简介：Itissignificanttocombinemultipletasksintoanoptimalworkpackageindecision-makingofaircraftmaintenancetoreducecost,soacostratemodelofcombinatorialmaintenanceisanurgentneed.However,theoptimalcombinationundervariousconstraintsnotonlyinvolvesnumericalcalculationsbutalsoisanNP-hardcombinatorialproblem.Tosolvetheproblem,anadaptivegeneticalgorithmbasedonclustersearch,whichisdividedintotwophases,isputforward.Inthefirstphase,accordingtothedensity,allindividualscanbehomogeneouslyscatteredoverthewholesolutionspacethroughcrossoverandmutationandbetterindividualsarecollectedascandidateclustercentres.Inthesecondphase,thesearchisconfinedtotheneighbourhoodofsomeselectedpossiblesolutionstoaccuratelysolvewithclusterradiusdecreasingslowly,meanwhileallclusterscontinuouslymovetobetterregionsuntilallthepeaksinthequestionspaceissearched.Thisalgorithmcanefficientlysolvethecombinationproblem.Takingtheoptimizationondecision-makingofaircraftmaintenancebythealgorithmforanexample,maintenancewhichcombinesmultiplepartsortaskscansignificantlyenhanceeconomicbenefitwhenthehaltcostisratherhigh.

简介：A2D-directionofarrivalestimation(DOAE)formultiinputandmulti-output(MIMO)radarusingimprovedmultipletemporal-spatialsubspacesinestimatingsignalparametersviarotationalinvariancetechniquesmethod(TS-ESPRIT)isintroduced.InordertorealizetheimprovedTS-ESPRIT,theproposedalgorithmdividestheplanararrayintomultipleuniformsub-planararrayswithcommonreferencepointtogetaunifiedphaseshiftsmeasurementpointforallsub-arrays.TheTS-ESPRITisappliedtoeachsub-arrayseparately,andinthesametimewiththeotherstorealizetheparallellytemporalandspatialprocessing,sothatitreducesthenon-linearityeffectofmodelanddecreasesthecomputationaltime.Then,thetimedifferenceofarrival(TDOA)techniqueisappliedtocombinethemultiplesub-arraysinordertoformtheimprovedTS-ESPRIT.Itisfoundthattheproposedmethodachieveshighaccuracyatalowsignaltonoiseratio(SNR)withlowcomputationalcomplexity,leadingtoenhancementoftheestimatorsperformance.

简介：InGaAsP/InPmultiplequantumwellswithquantumwellintermixinghavebeenpreparedbyimpurity-freevacancydisordering.Theluminescentcharacteristicswereinvestigatedusingphotoluminescenceandphotoreflectance,fromwhichthebandgapblueshiftwasobserved.Si3N4,SiO2andSOGwereusedforthedielectriclayertoenhanceintermixingfromtheoutdiffusionofgroupIIIatoms.Allsampleswereannealedbyrapidthermalannealing.Theresultsindicatethatthebandgapblueshiftvarieswiththedielectriclayersandtheannealingtemperature.TheSiO2cappingwithanInGaAscladdinglayerwassuccessfullyusedtoinducelargerbandtuningeffectintheInGaAsP/InPMQWsthantheSi3N4cappingwithanInGaAscladdinglayer.Ontheotherhand,sampleswiththeSi3N4-InPcaplayercombinationalsoshowlargerenergyshiftsthanthatwithSiO2-InPcaplayercombination.