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  • 简介:Asingle-particlemicrobeamfacilityhasbeenconstructedattheLaboratoryofIonBeamBioengineering(LIBB),ChineseAcademyofSciences.Thesystemisdesignedtodeliverthedefinednumberofhydrogenions,coveringarangeofenergyfrom1.0to3.5MeV,intoanareasmallerthanthenucleiofindividuallivingcells.AccuracyoftheparticledetectionsystemandthecelltargetingsysteminthefacilityhasbeenassessedusingCR39(nucleartrackdetector)for2.3MeVprotons.Theresultsdemonstratethattheparticledetectionefficiencyisabove98%,andtheoveralltargetingaccuracyofthemicrobeamislimitedwithin3μmformorethan90%hits.

  • 标签: 单粒子微光束设备 精确性测量 生物工程离子束实验室 单细胞照射 原子核轨迹探测
  • 简介:Thispaperdealswithamethodologyforsinglegatelocationoptimizationforplasticinjectionmold.Theobjectiveofthegateoptimizationistominimizethewarpageofinjectionmoldedparts,becausewarpageisacrucialqualityissueformostinjectionmoldedpartswhileitisinfluencedgreatlybythegatelocation.Featurewarpageisdefinedastheratioofmaximumdisplacementonthefeaturesurfacetotheprojectedlengthofthefeaturesurfacetodescribepartwarpage.Theoptimizationiscombinedwiththenumericalsimulationtechnologytofindtheoptimalgatelocation,inwhichthesimulatedannealingalgorithmisusedtosearchfortheoptimum.Finally,anexampleisdiscussedinthepaperanditcanbeconcludedthattheproposedmethodiseffective.

  • 标签: 注射模拟 最优化 塑料材料 成型加工
  • 简介:TheangledependenceofopticalphononmodesofanAlNbulksinglecrystalfromthem-plane(1100)andc-plane(0001)surfaces,respectively,isinvestigatedbypolarizedRamanspectroscopyinabackscatteringconfigurationatroomtemperature.CorrespondingRamanselectionrulesarederivedaccordingtomeasuredscatteringgeometriestoillustratetheangledependence.Theangle-dependentintensitiesofphononmodesarediscussedandcomparedtotheoreticalscatteringintensities,yieldingtheRamantensorelementsofA1(TO),E22,E1(TO),andA1(LO)phononmodesandtherelativephasedifferencebetweenthetwocomplexelementsofA1(TO).Furthermore,theRamantensorofwurtziteAlNiscomparedwiththatofwurtziteZnOreportedinpreviouswork,revealingtheintrinsicdifferencesoflatticevibrationdynamicsbetweenAlNandZnO.

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  • 简介:Anewapproachbasedonmultiwaveletstransformationandsingularvaluedecomposition(SVD)isproposedfortheclassificationofimagetextures.LowersingularvaluesaretruncatedbasedonitsenergydistributiontoclassifythetexturesinthepresenceofadditivewhiteGaussiannoise(AWGN).Theproposedapproachextractsfeaturessuchasenergy,entropy,localhomogeneityandmax-minratiofromtheselectedsingularvaluesofmultiwaveletstransformationcoefficientsofimagetextures.Theclassificationwascarriedoutusingprobabilisticneuralnetwork(PNN).Performanceoftheproposedapproachwascomparedwithconventionalwaveletdomaingraylevelco-occurrencematrix(GLCM)basedfeatures,discretemultiwaveletstransformationenergybasedapproach,andHMMbasedapproach.Experimentalresultsshowedthesuperiorityoftheproposedalgorithmswhencomparedwithexistingalgorithms.

  • 标签: 图象纹理分类 多小波域 奇异值特征 概率神经网络
  • 简介:细胞的神经/非线性的网络(CNN)是为图象和录像信号处理的一个强大的工具,机器、生物的视觉。这篇论文与在二进制图象提取关上的域的性能介绍一种CNN,并且为设计如此的一种CNN的模板给一个一般方法。一条定理为决定为实现的参数间隔规定了分别地处理功能的图象提供参数不平等。在二进制规模图象提取关上的域的Examplesfor被给。

  • 标签: 鲁棒性设计 CNN模板 细胞神经网络 视频成像 图像处理函数
  • 简介:我们建议被用来在single-j壳的Hamiltonian决定联合参数C的一个修改公式。与以前已知的公式比较,新公式改进在入侵者single-j层次和尼尔逊之间的协议。为在粒子转子模型以内的chiral乐队的研究,新联合参数将更加影响在马甲乐队之间切开的精力。

  • 标签: 耦合参数 壳模型 修正公式 粒子转子模型 哈密尔顿 尼尔森
  • 简介:Effectsofpressureand/ormagnetismonthecriticalsuperconductingtemperature(Tc)ofδ-MoNsinglecrystalwereinvestigatedusingaMaglabsystem.Theδ-MoNsinglecrystalwassynthesizedatextremeconditionsofhighpressureandhightemperature.Thecarrierdensityofδ-MoNsinglecrystalasafunctionofappliedpressurewasdeterminedusingHallcoefficientmeasurement.

  • 标签: 单晶合成 加压力 超导 磁性 载流子密度 ab系统
  • 简介:控制并且操作单个fluorophores的荧光具有对为它在改进分子的photonics和分子的电子学的表演的潜在的使用的最近的年的大兴趣,例如在基于单个分子的器官的轻射出的设备,单个光子来源,器官的地效果晶体管,和探针或传感器。这评论显示出单个器官的分子的荧光排放怎么能用金属性的nanostructures和electric-field-induced电子转移的本地电磁的领域被修改。荧光开关的Electric-field-induced荧光调整,磁滞现象,和成就详细被讨论。

  • 标签: 单分子荧光 有机电致发光器件 场效应晶体管 单分子传感器 电场诱导 分子电子学
  • 简介:Anopposite-chirpedfrequency-domainopticalparametricamplification(OC-FOPA)designisdemonstratedandnumericallyverified.Thisschemecombinesbothanultrabroadseedinggenerationandthesubsequenteffectiveamplificationinonesingleopticalparametricamplificationstage.Basedonaslightlyasymmetrical4-fopticalsystem,thespectralcontentsofbothpumpandsignalwavesarespectrallydispersedwithoppositespatialchirps,tobroadentheinitialidlerseeding.Viaaproperlydesignedfan-outperiodicallypoledLiNbO3chip,nearlyperfectquasiphasematchingcanberealizedacrossthefullspectrum,wherebyeachindividualspectralpairpreciselymapstoitsrequiredgratingperiod.Full-dimensionalsimulationsbasedoncommercial110fs(FWHM)nearinfrared(near-IR)lasersat790and1030nmarequantitativelydiscussed,andfew-cyclemid-IRlaserpulses(60fsat3.4μm)plusahighconversionefficiencyexceeding50%aretheoreticallypredicted.Bymeansofahigh-powerpumpsource,theOC-FOPAschemecanbealsoappliedtodirectlyproducehigh-intensitycarrier-envelope-phase-stabilizedmid-IRidlerpulses.

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