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简介：Thelocalthermalconductivityofpolycrystallinealuminumnitride(AlN)ceramicsismeasuredandimagedbyusingascanningthermalmicroscope(SThM)andcomplementaryscanningelectronmicroscope(SEM)basedtechniquesatroomtemperature.ThequantitativethermalconductivityfortheAlNsampleisgainedbyusingaSThMwithaspatialresolutionofsub-micrometerscalethroughusingthe3ωmethod.Athermalconductivityof308W/m·Kwithingrainscorrespondingtothatofhigh-puritysinglecrystalAlNisobtained.Theslightdifferencesinthermalconductionbetweentheadjacentgrainsarefoundtoresultfromcrystallographicmisorientations,asdemonstratedintheelectronbackscattereddiffraction.Amuchlowerthermalconductivityatthegrainboundaryisduetoimpuritiesanddefectsenrichedinthesesites,asindicatedbyenergydispersiveX-rayspectroscopy.

简介：一个新方法基于光线扫描的传统的方法被介绍了解决由采用线段在染色性图判定颜色的问题近似曲线--用多角形的近似闭曲线。然后，一个向量坐标能被用来描述曲线而不是曲线方程。判定在一个区域和一个点或一个地点之间的拓扑学关系因此是容易的。并且任何数据处理方法过时的人或物过去常节省存储器，它做改进光线扫描方法在颜色的测量是相当有用的。

简介：Inthispaperthedevelopmentofthetechnologyofthelaserscanningissummarized.Theprinciplesoflaserrangescanningareintroduced.Basedonthelaserscanningtechnologyandmethods,whichareinvestigatedbytheauthorstosurveydepositvolume,asurveyingsystemisdevelopedandapracticalapplicationisperformed.Itisshownthatthelaser-scanningtechnologyhasobviousadvantagessuchasmeasurementprecision,automationandvisualizationofobserveddataincomparisonwiththetraditionalmethods.Asaresult,laborintensityisrelievedobviouslyandworkefficiencyispromoted.

简介：Toenhancethesecurityofnetworksystems,putsforwardakindofsoftwareagentisputforward,whichhastheinductionabilityofnetworkframeworksandtheabilityofbehaviorindependence.Itismobilescanningagent.Moreattentionsispaidtoexpoundhowtodesignandrealizemobilescanningagent.Besides,itisalsoexplainedtheprogramsofmobilescanningagentsystem.Intheend,itexpectsmobilescanningagent.

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简介：Anoveltechniquetermednonredundantarrayscanningholographybasedontheprincipleofopticalheterodynescanningholographyandthetomographictechniqueofcodedapertureimagingisproposed.Thesystemdesignedintermsofthistechniquecodesanobjectopticallyanddecodesitscodedimagedigitally.Itcanrealizeopticaltomogramsofthree-dimensionalobjects.Italsohaspotentiallypracticalvalueduetoitscompactstructure.Thecomputersimulationspresenttheprincipleofthetechnique.Someexperimentsattheproof-principlelevelareperformedtotesttheprinciple.

简介：Ascanningnear-fieldopticalmicroscopeusinguncoatedfibertipisdescribed,whichcanworkintransmissionandreflectionconfigurations,bothcapableofworkinginilluminationandcollection-mode,sothateithertransparentoropaquesamplecanbeinvestigated.Dependingondifferentapplications,eitherconstant-gaporconstant-heightimagescanbeachieved.Acompacthomemadetranslatorpermitstoselectinterestedareaofsampleintherangeof4mm×4mm.Workingintheconstant-heightaswellastransmissionandcollection-modeconfiguration,severalkindsofsamplessuchasholographicgrating,liposomeandzeolitewereinvestigated.TheexperimentalresultsrevealedthedependenceoftheopticalresolutionoftheSNOMonthetip-sampleseparation.

简介：Opticalaxialscanningisessentialprocesstoobtain3Dinformationofbiologicalspecimens.Torealizeopticalaxialscanningwithoutmoving,thetunablelensisasolution.However,theconventionaltunablelensesusuallyinducenon-uniformmagnificationandresolutionissues.Inthispaper,wereportamovableelectrowettingoptofluidiclens.Unliketheconventionaltunablelens,ourproposedoptofluidiclenshastwoliquid-liquid(L-L)interfaces,whichcanmoveinthecellbyanexternalvoltage.TheobjectdistanceandimagedistanceareadjustedbyshiftingtheL-Linterfaceposition.Therefore,theproposedlenscanrealizeopticalaxialscanningwithuniformmagnificationandresolutioninmicroscopy.Toprovetheconcept,wefabricateanoptofluidiclensanduseitinopticalaxialscanning.Thescanningdistanceismorethan1mmwithuniformmagnificationandgoodimagingquality.Widespreadapplicationofsuchanewadaptivezoomlensisforeseeable.

简介：Theglassytransitionofthepolyethyleneterephthalate(PET)sampleswhichhavebeensubjectedtosolventinducedcrystallization(SINC)wasinvestigatedbymodulateddifferentialscanningcalorimetry(MDSC)anddensitymeasurement.Thedif-ferentialofheatcapacitysignal,dC_p/dTfromMDSC,wasusedtomonitortheSINCprocess.ItrevealsthattheT_gtemperatureshiftstohighervaluewiththeadvancementofSINC.Whenthetoluene-immersingtimewaslonger(168h),thedetectionofT_gbecomemoredifficult,becausesomesmallerpeaksemergedatthelowertemperaturesandtheseareexplainedasthemovementofsmallsegmentsintheamorphousregion.TheseobservedresultsareduetothemorphologyandstructureintroducedbytheSINCprocess.

简介：一个理论模型被建议以便在s-SNOM学习配置回声。在样品和探查尖端之间的电磁的联合与伪静电的领域理论被描述。这个方法允许我们分析在探查尖端和样品之间的相互作用直觉地在s-SNOM唤起的configurational回声。为某个系统的反响的条件在一张明确的表格被介绍。在考虑样品偶极子和探查偶极子的实际尺寸的条件上，我们讨论为各种各样的材料样品认识到configurational回声的可能性。，数字结果显示绝缘的探查尖端的polarizability太小，不能引起这回声，表面电浆子回声出现在金属性的nanoparticles上，金属性的探查尖端的提高的polarizability保证完成回声的要求。CLC数字TH742这个工作被中国的国家自然科学基础在资助号码下面支持30170276。

简介：象限光电探测器是一个新类型位置检测器，它已经被用于象测量那样的许多地，追踪的目标，控制，激光描准，指导，等等。系统性能与象限光电探测器收到的激光点区域有关。仅仅当激光分散点的尺寸对察觉者均匀时，系统的线性输出信号被得到的最佳感光性的区域。测量察觉者收到的themini点并且在实时调整它的一个方法被介绍，它基于几何的象限和光结构，使用倾斜镜子扫描，察觉者的顺序产量信号被得到，因为特征变量，激光分散点的半径和分散的可调节的价值是计算的，然后，测量模型与信号变化的率被造。实验结果证明最大的错误是0。在测量的58μm0变化。5公里±0.1公里。

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简介：Theerrorsourcesrelatedtothelaserrangefinder,GPSandINSareanalyzedindetails.Severalcoordinatessystemsusedinairbornelaserscanningaresetup,andthenthebasicformulaofsystemisgiven.ThispaperemphasizesondiscussingthekinematicoffsetcorrectionbetweenGPSantennaphasecenterandlaserfiredpoint.Andkinematictimedelayinfluenceonlaserfootprintposition,therangingerrors,positioningerrors,attitudeerrorsandintegrationerrorsofthesystemarealsoexplored.Finally,theresultshowsthatthekinematictimedelaycanbeneglectedascomparedwithothererrorsources.Theaccuracyofthecoordinatesisnotonlyinfluencedbytheamplitudeoftheerror,butalsocontrolledbytheoperationparameterssuchasflightheight,scanningangleamplitudeandattitudemagnitudeoftheplatform.

简介：InordertoexplorethefeasibilityofusingX-raytomeasuremoisturecontentinthedryingprocessandhaveafurtherstudyontheeffectofprecisionofmoisturecontentwhenscanningthroughdifferentgraindirections,X-rayscanningmethodandweightingmethodwereusedtomeasureaveragemoisturecontentofCunninghamialanceolataduringhotairdrying.Theresultsshowthatthemoisturecontentvaluesoftwomethodswereveryclosetooneanother,thedeterminationcoefficientsofbothwerehighlycorrelatedwithavalueover0.99,andtheabsolutedeviationwasbelow2%;whenscanningalongradialdirectionandlongitudinaldirection,theprecisionsofaveragemoisturecontentwerehigherthanthatofthetangentialdirection,butthedeviationcanbenegligibleintheactualmeasurement;inthepracticalapplication,theeffectofgraindirectiononprecisionofmoisturecontentmeasurementcouldnotbetakenintoaccountwhenusingX-raytomeasurethemoisturedistributionofwood.

简介：Amethodofdetectingdry,icyandwetroadsurfaceconditionsbasedonscanningdetectionofsinglewavelengthbackwardpowerisproposedinthisletter.Thedetectorisusedtoreceivethebackwardscatteredpowerwhichchangeswiththeincidenceangle.Therelationshipbetweenbackwardpowerandincidenceangleisusedtofindouttheeffectiveanglerangeanddistinguishmethod.Experimentandsimulationshowthatitisfeasibletoclassifythesethreeconditionswithinincidenceangleof5.3degree.

简介：Thisletterpresentsalabel-freebiomolecularimagingtechniquebasedonwhite-lightinterferometryandspectraldetection.Themethodmeasuresthicknesschangescausedbyspecificbindingbetweenbiomoleculestodetectthepresenceofcertainanalyte.Aspectrum-shiftingalgorithmisdevelopedtoresolvethethicknessinformationfromthespectrum.Theaxialresolutionoftheexperimentalinstrumentcanreach～1nm,therebyenablingdetectionoftraceamounts(～1ng/mm2)ofproteinsorDNA.ThisletteralsopresentstwoexperimentstoprovethefeasibilityofthemethodfordetectingproteinsandDNAwithoutfluorescentlabeling.

简介：Inopticalscanningholography,onepupilproducesasphericalwaveandanotherproducesaplanewave.Theyinterferewitheachotherandresultinafringepatternforscanningathree-dimensionalobject.Theresolutionofthehologramreconstructionisaffectedbythepointspreadfunction(PSF)oftheopticalsystem.Inthispaper,wemodulatethePSFbyaspiralphaseplate,whichsignificantlyenhancesthelateralanddepthresolution.Weexplainthetheoryforsuchresolutionenhancementandshowsimulationresultstoverifytheefficacyoftheapproach.

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简介：Acompactlinescanningquasi-confocalophthalmoscope(LSO)ispresentedinthisletter.Comparedwithaconventionalscanninglaserophthalmoscope(SLO),thebench-topLSOsignificantlyreducesthesize,complexity,andcostofSLOutilitywithroutineuse.TheLSOusesonemovingparttoproducehigh-contrastandhigh-resolutionquasi-confocalimageswithnearlythesameperformanceasaSLO.TheLSOhasamoderatefieldofview(～10),whichenablesimagesofthemacula,theopticnervehead,andothertargetstobeobtainedmorequicklyandefficiently.Animageoftheopticnerveheadistakeninapreliminaryinvestigationonhumansubjects.Individualnervefiberbundlesandvesselsareresolvedatashallowdepth,withalateralresolutionofnearly10μm.