简介：Anewmethodformeasuring3-Drigidbodydisplacementsisproposed,inwhichtwoperpendicularbeamsareemittedontotwosensitiveplanesofPSDsleingperpendiculartoeachother.Themethodcanbeusedtomeasure1-Dor2-Ddisplacementswhenrequired.Moreover,theexperimentalresultsarepresented,whichdemonstratethatthenewmethodhashighaccuracy,fastprocessingspeed,highreliability,andeasilybeingrealized.

简介：Focusingonobstacleavoidanceinthree-dimensionalspaceforunmannedaerialvehicle(UAV),thedirectobstacleavoidancemethodindynamicspacebasedonthree-dimensionalvelocityobstaclesphericalcapisproposed,whichquantifiestheinfluenceofthreateningobstaclesthroughvelocityobstaclesphericalcapparameters.Inaddition,theobstacleavoidanceschemesofanypointonthecriticalcurveduringthemulti-obstaclesavoidancearegiven.Throughprediction,theinsertionpointfortheobstacleavoidancecanbeobtainedandtheflightpathcanbereplanned.TakingthePythagoreanHodograph(PH)curvetrajectoryre-planningasanexample,thethree-dimensionaldirectobstacleavoidancemethodindynamicspaceistested.Simulationresultsshowthattheproposedmethodcanrealizetheonlineobstacleavoidancetrajectoryre-planning,whichincreasestheflexibilityofobstacleavoidancegreatly.

简介：Itiswellknownthatopticaltomographycanaccuratelyandquantitativelyre-constructtherefractiveindexfieldofatransparentmediumanddisplaythethreedimensionalimageofotherthysicalquantitiesrelevanttotemperatureordensity.Inthispaper.anewmultidirectionalholographicinterferometricsystemisbuilt,andtwokindsofimagetecon-structionalgoritmaareintroducedandanautomaticimageprocessingsystemofinterfero-gramisdesigned.Athreedimentsionalasymmetricgadflowfieldaboveacombustorisexperi-mentallyinvestigatedwithholographicinterferormetry.Thereconstructedtemperaturesaresimilartothosemeasuredwithathermocouple.

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简介：Inthispaper,weproposeadynamicmulti-descriptorfusion(DMDF)approachtoimprovingtheretrievalaccuracyof3-dimensional(3D)modelretrievalsystems.First,anindependentretrievallistisgeneratedbyusingeachindividualdescriptor.Second,weproposeanautomaticrelevant/irrelevantmodelsselection(ARMS)approachtoselectingtherelevantandirrelevant3Dmodelsautomaticallywithoutanyuserinteraction.Aweighteddistance,inwhichtheweightassociatedwitheachindividualdescriptorislearntbyusingtheselectedrelevantandirrelevantmodels,isusedtomeasurethesimilaritybetweentwo3Dmodels.Furthermore,adescriptor-dependentadaptivequerypointmovement(AQPM)approachisemployedtoupdateeveryfeaturevector.Thissetofnewfeaturevectorsisusedtoindex3Dmodelsinthenextsearchprocess.Four3DmodeldatabasesareusedtocomparetheretrievalaccuracyofourproposedDMDFapproachwithseveraldescriptorsaswellassomewell-knowninformationfusionmethods.ExperimentalresultshaveshownthatourproposedDMDFapproachprovidesapromisingretrievalresultandalwaysyieldsthebestretrievalaccuracy.

简介：Thispaperpresentsalargefieldphase-shiftinginterferencemicroscopeformicro-surfacetopographymeasurement.APZTisusedastheZ-directionalphaseshifter.TheinterferencemicroscopeisthecombinationoftheinfinitytubemicroscopewiththeMirautwo-beaminterferometer.Two-dimensionalprecisionmotorizedstageisalignedasthescanningsystemintheX-andY-directiontoextendthetestsurfacemeasurementrangeto12.5mm×12.5mm.Theminimumdisplacementis0.039μmandtheoverlappedproportionis0.22.Afaststitchingalgorithmisproposedbasedongridmatching.Accordingtothereflectivityofthecoreandtheferrule,theplatewiththetransmission/reflectivityratioof70/30isselectedtobalancetheinterferenceintensity.Theinstrumentisprovedtobevalidbyactualmeasurementoftheendsurfaceofanopticalfiberconnector.

简介：一新大规模三维(3D)重建技术基于有颜色位置特征的不可分的成像被介绍。目标点的颜色类似于相应的点的那些。因为不可分的成像与在x和y方向上有类似的程度的一个高级数组捕获信息，相应的点坐标形成算术前进。这种常规关系被用来决定相应的点参数因为从划分元素的图象的重建的3D信息由颜色分开了，它包含几个相应的点。建议方法的可行性通过一个光室内的实验被表明。建议方法的大规模应用被实验作为它的目标与我们的学校的一个角落说明。

简介：ThedeterminationofLuzhou-flavorliquoragesiscarriedoutbythree-dimensionalfluorescencespectroscopycombinedwithnon-negativematrixfactorization(NMF).37samplesofagedliquorswithweightedagesof15,20and25yearswerepreparedbyblendingthreeLuzhou-flavororiginalbaseliquorswithstorageagesof10,20and30yearsindifferentproportions.Thefluorescencespectraofthesamplesweremeasured,andthenfactorizedintobasismatrixandcoefficientsmatrixbymultiplicativeiterativeNMF.Thefluorescencespectra,reconstructedfromthebasismatrix,aresimilartotheoriginalspectra.Thecoefficientsmatrixistakenastheinputofsupportvectormachine(SVM)toestablishapredictionmodelforthedeterminationofliquorages.Comparedwiththeprincipalcomponentanalysis,thepredictionmodelbasedonSVMhasapredictedaccuracybetterthan91.7%.Thismethodcanprovidehelpsforthemarketsupervisionontheagedliquors.

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简介：AnewGraphicsProcessingUnit(GPU)parallelizationstrategyisproposedtoacceleratesparsefiniteelementcomputationforthreedimensionalelectromagneticanalysis.TheparallelizationstrategyisemployedbasedonanewcompressionformatcalledslicedELLFour(slicedELL-F).TheslicedELL-Fformat-basedparallelizationstrategyisdesignedforhasteningmanyaddition,dotproduct,andSparseMatrixVectorProduct(SMVP)operationsintheConjugateGradientNorm(CGN)calculationoffiniteelementequations.ThenewimplementationofSMVPonGPUsisevaluated.TheproposedstrategyexecutedonaGPUcanefficientlysolvesparsefiniteelementequations,espe-ciallywhentheequationsarehugesparse(sizeofmostrowsinacoefficientmatrixislessthan8).NumericalresultsshowtheslicedELL-Fformat-basedparallelizationstrategycanreachsigni?cantspeedupscomparedtoCompressedSparseRow(CSR)format.

简介：Apiezoelectricaccelerometerwithopticalfibertomeasurethedynamicparameterof3dimensionsispresented.TheoperationequationsonX,YandZaxesaredivided,andthetestresultsof3dimensionalsensitivitiesandfrequencyresponse,aregivenaswellasexperimentresultsofvibrationtestwiththissetup.

简介：Inthispaper,asetofclosed-formformulasforvectorFiniteElementMethod(FEM)toanalyzethreedimensionalelectromagneticproblemsispresentedonthebasisofGaussianquadratureintegrationscheme.Byanalyzingtheopenregionproblems,thefirst-orderAbsorbingBoundaryCondition(ABC)isconsideredasthetruncationboundaryconditionandtheequationiscarriedoutinaclosed-form.Basedontheformulas,thehybridExpandedCholeskyMethod(ECM)andMultiFrontalalgorithm(MF)isappliedtosolvefiniteelementequations.Usingtheclosed-formsolution,theelec-tromagneticfieldofthreedimensionaltargetscanbestudiedsententiouslyandaccurately.Simulationresultsshowthatthepresentedformulasaresuccessfullyandconcise,whichcanbeeasilyusedtoanalyzethreedimensionalelectromagneticproblems.

简介：Inordertosolvetheproblemofhighprecision,completeelectricinsulatingdetectionofthepressuremeasuringsystem,wehavedevelopedthethree-beaminterferometer.Inthispaper,theoperationprinciple,structureofthesystemandmeasuringresultsaregiven.

简介：Usingtheraytracemethod,three-sectionsemiconductorlasersarestudied.Ananalyticexpressionofoutputpowerforthethree-sectionsemiconductorlasersisderivedforthefirsttime.Fromethisexpression,thresholdconditionisalsoobtained.

简介：Inphaseunwrapping,howtocontroltheresiduesandcut-linesiscriticaltounwrapill-statewrappedphasemapsuccessfully.Somenewconceptsinphaseunwrappingfieldareproposed.Firstly,theresiduesinthreetypes,I.e.,singularresidues,normalresiduesandvirtualresidues,areclassified,whichleadstosomerationalunwrappingpaths.Secondly,somedifferencesbetweencut-lineandcurved-lineareanalyzed.Andfinally,experimentiscarriedouttocompareournewenhancedGoldsteinalgorithmwiththeoriginalGoldsteinalgorithm.

简介：Thenon-minimumphasefeatureoftail-controlledmissileairframesisanalyzed.Threeselectionstrategiesfordesiredperformanceindexesarepresented.Anaccelerationautopilotdesignmethodologybasedonoutputfeedbackandoptimizationisproposed.Performanceandrobustnesscomparisonsbetweenthetwo-loopandclassicalthree-looptopologiesaremade.Attemptstoimprovetheclassicalthree-looptopologyarediscussed.Despitethesameopen-loopstructure,theclassicalthree-loopautopilotshowsdistinctcharacteristicsfromatwo-loopautopilotwithPIcompensator.Boththetwo-loopandthree-looptopologiescanstabilizeastaticunstablemissile.However,thefiniteactuatorresourceisthecrucialfactordominatingautopilotfunction.

简介：Anewclassofmultilength,constant-weightandtwo-dimensionalmultiwavelengthopticalorthogonalcode(2DMWOOCs)withlargecapacityandgoodcorrelationpropertiesisconstructedbasedonmultilengthone-dimensional(1D)OOCs.TheperformanceofthesenewMWOOCsinanOCDMAnetworkwithdouble-servicesisanalyzed.Theresultshowsthatmediawiththeshortercodewordperformsmuchbetterthanthemediawithlongercodeword,andOCDMAsystemwiththesenewmultilengthMWOOCsperformswell.ThesefeaturesallowmultimediatransmissionoflargecapacityinOCDMAsystem.

简介：AlthoughHamilton'squaternionhasbeenintroducedsuccessfullyinestimatingfrequenciesoftwodimensionalharmonics,itwasdifficulttouseittoestimatefrequenciesoftwodimensionalharmonicsinadditivenoisebecausethemultiplicativerulesofHamilton'squaternionwerenotcommutative.Inthispaper,wepresentedanewideatosolvethisproblemandappliedittoarraysignalprocessing.First,wepresentedanotherdefinitionofoperationrulesofquaternion,whosemultiplicativeruleswerecommutative.Second,weappliedthisdefinitiontoconstructcorrelationmatrixofhypercomplexsignalmodelbasedonquaternionsoastorestrainadditivenoise.Finally,wegottheisomorphiccomplexmatrixofcorrelationmatrixofhypercomplexsignalmodeltoestimatefrequencies.Somesimulationsillustratedournewidea.

简介：新伪直角的时空块代码(QO-STBC)基于有更低的译码的复杂性和更高的位错误统计(BER)的父亲代码，性能最近被派克·乌建议，它能获得完整的传播率和完整的差异。在这篇文章，作者基于旋转父亲代码建议了一个改进派克·乌计划。为消除在信号察觉期间源于附近的信号的干扰术语，二个不同矩阵被使用。并且当在接收装置的最大可能性的的译码被使用时，译码的独立人士能被认识到。模拟结果证明没有与派克·乌计划相比增加译码的复杂性，BER表演戏剧性地被改进。

简介：波长demultiplexer基于二维的photonic水晶波导被建议。由使用域(FDTD)方法和飞机挥动扩展(PWE)方法的有限差别时间，传播系列和模式地的分布被获得，并且波长demultiplexer被综合了。设备的特征被获得。