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简介：Liquidmicro-jets,producedfromgasdynamicvirtualnozzles(GDVNs),areusedassamplecarriersforinteractionwithX-raybeaminserialfemtosecondcrystallography(SFX).Anumericalinvestigationoftheeffectofthefocusinggastypeontheliquidmicro-jetproperties(itslengthandthickness)ispresented.ThestudycomplementsourpreviousresearchontheinfluenceofoperatingconditionsandthenozzlegeometryonGDVNperformance.Theinfluenceofhelium,argon,carbondioxideandnitrogengases(atafixedmassflowrateof1.6×104mg/min)onfocusingpurewaterjet(flowrateof33μl/min)isanalysed.

简介：AnovelLD-pumpedsingle-frequencymicro-chipgreenlaserispresented.ByusingthecombinationofshortcavityandLoytfilterformedbyRochonprismandKTPcrystal,astablesinglefrequencygreenlaserisobtainedwith60mWoutputat500mWLD-pump.Theoptical-to-opticalconversionefficiencyisabout12%.Theopticalcontactbetweencomponentsofthelaserisadopted.Thislaserhastheadvantagesofacompactstructureandalowcost.

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简介：Atpresent,boththepointsourceandtheimagingpolarizationnavigationdevicesonlycanoutputtheangleinformation,whichmeansthatthevelocityinformationofthecarriercannotbeextractedfromthepolarizationfieldpatterndirectly.Opticalflowisanimage-basedmethodforcalculatingthevelocityofpixelpointmovementinanimage.However,forordinaryopticalflow,thedifferenceinpixelvalueaswellasthecalculationaccuracycanbereducedinweaklight.Polarizationimagingtechnologyhastheabilitytoimproveboththedetectionaccuracyandtherecognitionprobabilityofthetargetbecauseitcanacquiretheextrapolarizationmulti-dimensionalinformationoftargetradiationorreflection.Inthispaper,combiningthepolarizationimagingtechniquewiththetraditionalopticalflowalgorithm,apolarizationopticalflowalgorithmisproposed,anditisverifiedthatthepolarizedopticalflowalgorithmhasgoodadaptationinweaklightandcanimprovetheapplicationrangeofpolarizationnavigationsensors.Thisresearchlaysthefoundationfordayandnightall-weatherpolarizationnavigationapplicationsinfuture.

简介：Anovelhighlyporous3-Dpoly(ε-caprolactone)(PCL)scaffoldwithmicro-channelswasfabricatedbyinjectionmoldinganddiluentaceticacidsleachingtechnologies.Inthisstudy,thechitosanfiberwasemployedtoformthemicrochannelinPCLmatrix.Themorphology,porosityandmechanicalpropertiesofthescaffoldswerestudiedandcalculated.Itwasfoundthatthelargerthecontentofchitosanfiberis,thehighertheporositywouldbe,duetothevolumetricexpansionofchitosanfiberinPCLmatrixduringitbeingleached.Inaddition,thelessthecontentofchitosanfiberis,thehigherthecompressivemoduluswouldbe.

简介：Amodifiedtorsionpendulumapparatusisdevelopedformeasuringtheshearmodulusofsinglefilamentswithuniformmicro-sizeddiameter.Asinglefilamentfixedatbothendsandwitharing-shapedmassattachedatthemiddleisusedasaclamped-clampedtorsionpendulum.Theshearmodulusofsinglefilamentscanbeexpressedasafunctionoftheoscillationfrequencyofthetorsionpendulum.TheoscillationmotionismeasuredwithaCCDlaserdisplacementsensor,anditsfrequencyisdeterminedbytheFastFourierTransform(FFT)method.Theshearmoduliofthreetypesoffilaments:copperwires,tungstenwiresandcarbonfibersareaccuratelymeasuredwiththistechnique.Itisfoundthatthesizeeffectinshearmoduliofbothcopperwiresandtungstenwiresisminor.Finally,theerroranalysisofourmeasurementtechniqueispresentedindetail.

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简介：Aneffectivedesignmethodoffreeformmicrolensarrayispresentedforshapingvariedlaserbeamsintoprescribedrectangularillumination.Thevariableseparationmappingisappliedtodesignconcavefreeformsurfacesforconstructingafreeformlensarray.Severaldedicatedexamplesshowthatthedesignedfreeformopticallensarraycanachieveaprescribedrectangularilluminationpattern,especiallywithoutconsideringtheinitialstatesofincidentlaserbeams.Bothhighcollectionefficiencyandgoodspatialuniformitycanbeavailablesimultaneously.Toleranceanalysisisalsoperformedtodemonstratethatthisopticaldevicecanwellavoidfabricatingdifficultyinactualapplications.

简介：现在的学习报导R134a流动在微隧道的热水池沸腾特征的热转移的试验性的评估。热水池由30平行组成矩形与500m宽度和深度的代表性的尺寸微隧道，以及全部长度30mm。实验与热流动被进行直到从373.33～1244.44kg/m22,团速度>s，蒸汽质量从0.06～0.9。加热的热水池的墙温度能在约50点被控制

简介：为了描述创造登陆的一种新奇技术，在trabecular网状组织以内脱衣指导trabecular微绕过stent(iStent)在经历了phacoemulsification.METHODSThirty的病人的培植--从从2014年5月在phacoemulsification以后经历了iStent培植到2015年2月的30个病人的四只眼睛在我们的回顾的学习被包括。所有iStents经由登陆长带技术被植入。A25计量器microvitreoretinal片被用来切分trabecular网状组织到不到1钟小时，有效地创造登陆脱衣。iStent棉棍沿着登陆长带被压然后stent被释放进34与iStent培植看的trabecularmeshwork.RESULTSOf，(79.4%)27看有的主要开角度的绿内障，(17.6%)6看有的pseudoexfoliation绿内障，并且(2.9%)1看有的眼睛的高血压。在6月的后续(n=17)，低血压患者药的吝啬的数字从2.2减少了

简介：Wereportedacoaxial,micro-dielectricbarrierdischarge(micro-DBD)reactorandaconventionalDBDreactorforthedirectconversionofmethaneintohigherhydrocarbonsatatmosphericpressure.Theeffectsofinputpower,residencetime,dischargegapandexternalelectrodelengthwereinvestigatedformethaneconversionandproductselectivity.Wefoundtheconversionofmethaneinamicro-DBDreactorwashigherthanthatinaconventionalDBDreactor.Andataninputpowerof25.0W,theconversionofmethaneandthetotalC2+C3selectivityreached25.10%and80.27%,respectively,withamicro-DBDreactorof0.4mmdischargegap.Finally,anonlinearmultipleregressionmodelwasusedtostudythecorrelationsbetweenbothmethaneconversionandproductselectivityandvarioussystemvariables.ThecalculateddatawereobtainedusingSPSS12.0software.Theregressionanalysisillustratedthecorrelationsbetweensystemvariablesandbothmethaneconversionandproductselectivity.

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简介：Laser-inducedbreakdownspectroscopy(LIBS)hasbeenextensivelyappliedduetothecapabilitiesofreal-time,multi-phaseandmulti-elementanalysis.Withtheadvantages,portableLIBSisinrapiddevelopmentwithgreatpotentialoffieldmeasurements.Inthiswork,aportableLIBSwasdevelopedbya50μJlevellaserforexcitationandanobjectivelensforfocusingorimaging.Elementdetectionwassuccessfullyachievedbythissetup,andalsothemicroscopicobservationcouldbeobtainedwiththemagnificationof350×.ApreliminaryinvestigationwascarriedoutformineralrecognitionbythedevelopedportableLIBS.Theobtainedresultsindicatethattheelementdetectioncombinedwithmicroobservationwasaneffectivewayforrecognizingminerals,especiallyforsimilarmineralidentificationordiscrimination.Itissuggestedthatthemicro-joulelasercouldbealternativeforthecommercialportableLIBS,andtheon-sitemineralorrockrecognitionisapromisingfieldfortheapplication.

简介：陶器的涂层被微等离子区氧化(军邮局)在NaAlO2答案在Ti-6A14V合金上准备。涂的样品和底层的盐水花测试在一台盐水花测试机器被执行。涂层的阶段作文和表面形态学被XRD和SEM调查。严重腐蚀发生在底层表面上，当涂的样品上没有明显的腐蚀现象时。涂层由Al2TiO5和小-Al2O3和金红石TiO2组成，并且盐水花测试没改变涂层的作文。涂层的重量损失率与因为涂层的密度和厚度的增加，增加军邮局时间减少了。涂层的表面形态学被盐水花腐蚀测试影响。在涂的样品之中，为2h作好准备的涂层在盐水花测试下面有最好的腐蚀抵抗。

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.

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简介：Weproposeandexperimentallydemonstratecapacitiveactuationofagraphene–siliconmicro-ringadd/dropfilter.Themechanismisbasedonasilicon–SiO2–graphenecapacitorontopoftheringwaveguide.Weshowthecapacitiveactuationoftheadd/dropfunctionalitybyavoltage-drivenchangeofthegrapheneopticalabsorption.Theproposedcapacitivesolutionovercomestheneedforcontinuousheatingtokeeptunedthefilter’sin/outresonanceandthereforeeliminates'inoperation'energyconsumption.

简介：Theanalysisofstableisotopesofcarbonandoxygenindifferentcarbonaterocksbythephosphoricacidmethodisnoteasierthanthatbythelasersamplingmethoddevelopedinrecentyears,whichopticallyfocuseslaserbeamswithsufficientenergyonamicroareaofathinsectioninavacuumsampleboxviamicroscope.CO2producedbyheatingdecompositionofcarbonatewaspurifiedbythevacuumsystem,andthestableisotopicvaluesofcarbonandoxygenwerecalculatedandanalyzedonamassspectrometer.Thispaperadoptedthelasermicro-samplingtechniquetoanalyzethestableisotopesofcarbonandoxygenindolomite,carbonatecement,stromatoliteanddifferentformsofdawsonite(donbassite).Resultsindicatedthatthelasermicro-samplingmethodiseffectiveinanalyzingcarbonatecompositionandcouldbeaconvincingproofforjustificationoncarbonatecompositionanalysis.

简介：基于Si的多层的结构广泛地在当前的微电子学被使用。在他们的准备期间，一些不同类的剩余应力被导致，导致在接口错配和表面精力和平导致结构失败之间的竞争。这个工作在多层的半导体heterostructure在剩余应力的测量上介绍方法学的研究。扫描电子显微镜学(SEM)，micro-Raman光谱学(太太)，和传播电子显微镜学(TEM)被使用测量多层的结构的几何参数。在拉曼光谱和压力/紧张在上之间的关系[100]并且[110]水晶取向被决定分别地启用表面和剖面图剩余压力分析。基于印射结果的拉曼，沿着多层的heterostructure的深度的剩余应力的分发成功地被获得。