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336 个结果
  • 简介:现在的纸处理Gamma操作员的新类型,这里,我们估计这些新Gamma类型操作员Mn的pointwise集中的率,为围住的变化的功能的k,由使用概率的一些技术理论。

  • 标签: 收敛速度 算子 A型 有界变差函数 GAMMA 概率论
  • 简介:研究了几何Levy过程中,具有代表性的一类过程-方差Gamma过程下的等价鞅测度类问题,并且讨论了其具有的分析性质.进一步,我们也考虑了基于该过程的普通期权的定价.

  • 标签: 方差Gamma过程 纯跳 期权定价
  • 简介:TheeffectofstressdistributionduetothechangesofthedistalscrewalignmentinrelationtotheGammanailandthefemoralshaftisthoroughlystudiedinthispaper.FailureoftheGammanailcompositeoccursthroughthecranialapertureofthedistalscrewsandtheinsertionholeforthelagscrewduetononunion,delayed-unionandcontinuedweight-bearing.Athree-dimensionalfiniteelementmodelwasusedtostudythefracturedfemur,theGammanail,thelagscrewandthedistallockingscrews.ThefirstandtheseconddistalscrewswereinsertedintotheGammanailinfourdifferentconfigurations.WefoundthatthestressoftheGammanailcompositewassubstantiallyreducedwiththetwoscrewsconfiguredintheanteriortoposteriordirection.Thisalignmentcanbeargreaterloadinginthemoredemandingfracturetypes.Inthesubtrochantericfractureorthecomminutedfracturesattheproximalfemur,theoptimalalignmentofthetwodistalscrewswasintheanteriortoposteriordirection.

  • 标签: 关节断裂 有限元 微米钉 创伤学 大腿
  • 简介:在这篇论文,为由光滑ft/x的加权的moduli的Gamma操作员的联合的同时的近似上的一些相等的定理(/,t)w(p<(0Gamma操作符的联合和函数的衍生物的光滑的衍生物之间的关系也被调查。

  • 标签: 伽马算子 近似值 平滑度 数学分析
  • 简介:Inthispaper,anewestimatoroftheshapeparameterinthefamilyofGammadistributionisconstructedbyusingthemomentidea,anditisprovedthatthisestimatorisstronglyconsistentandasymptoticallynormal.

  • 标签: 形状参数 伽玛分布 渐进正态性 评估方法
  • 简介:TheserviceprovidedbytheGC(GammaCameras)intheNuclearMedicinedepartmentsfailsbecauseoftheirbreakdown,generallyduetotheassociatedelectronicsandnottothephysicaldetectioncomponents.Forthisreason,itwasdecidedtodevelopanelectronicsystemthatallowstherecoveryandoptimizationofdisusedGC,startingwiththedesignofthepreamplifierforaPMT(photomultipliertube).Thecircuitwasdesignedandsimulatedandthelistofcomponentsnecessaryfortheconstructionofthepreamplifierwasgenerated,aswellastheprintedcircuitboardwasdesignedforitsassembly.Bysimulatingthepreamplifierthisworkedinlinearmode.Thisdeterminesthattheamplitudeoftheoutputsignalisproportionaltotheamountofchargedeliveredbythedetector.ThiscardallowsanautomaticadjustmentofthesignalsofthePMTasdothemodernGC.

  • 标签: GAMMA CAMERA nuclear medicine PHOTOMULTIPLIER tube
  • 简介:Inthispaper,wedevotetoconstructingtheone-sidedempiricalBayes(EB)testforthelocationparameterintheGammadistributionbynonparametricmethod.Undersomemildconditions,weprovethattheEBtestisasymptoticallyoptimalwiththerateoftheorderO(n-δs/2s+1),where1/2≦δ<1ands>1isagivennaturalnumber.Anexampleisalsogiventoillustratethattheconditionsofthemaintheoremsareeasilysatisfied.

  • 标签: three PARAMETER Gamma distribution location PARAMETER
  • 简介:Synchronousgammaoscillationsarebelievedtoplayaprominentroleintheinformationprocessingofbiologicalneuralsystems.Experimentalobservationshavefoundthatthefrequencyandpowerofgammaoscillationsintheprimaryvisualcortex(V1zone)areregulatedbytheilluminationcontrastofvisualstimulus.However,theunderlyingmechanismofhowthesynchronousoscillationsdependontheilluminationcontrasthasnotbeenwellexplained.Weproposealocalexcitatory/inhibitory(E/I)neuronalnetworkofintegrate-and-fire(IAF)neuronswiththedifference-of-Gaussians(DOG)receptivefieldtounveilthismechanism.Simulationresultsdemonstratethatthehighertheilluminationcontrast,thehigherthefrequencyofgammaoscillations.Thepowerofgammaoscillationsalsoincreaseswiththeincreaseofilluminationcontrast.Theseresultsareconsistentwiththeexperimentalfindings.

  • 标签: Gamma oscillations ILLUMINATION CONTRAST E/I network
  • 简介:论述了分段函数在数学分析中的作用,并以分段函数为工具,给出了函数的原函数存在和黎曼可积之间的关系,有助于全面掌握原函数和定积分这两个重要概念.

  • 标签: 分段函数 可积性 原函数 间断点
  • 简介:P2Psystemsarecategorizedintotree-basedandmesh-basedsystemsaccordingtotheirtopologies.Mesh-basedsystemsareconsideredmoresuitableforlarge-scaleInternetapplications,butrequireoptimizationonlatencyissue.Thispaperproposesacontentsubscribingmechanism(CSM)toeliminateunnecessarytimedelaysduringdatarelaying.Anodecansendcontentdatatoitsneighborsassoonasitreceivesthedatasegment.Noadditionaltimeistakenduringtheinteractivestagespriortodatasegmenttransmissionofstreamingcontent.CSMconsistsofthreesteps.First,everynoderecordsitshistoricalsegmentslatency,andadoptsgammadistribution,whichpossessespowerfulexpressionability,toexpresslatencystatistics.Second,anodepredictssubscribingsuccessratioofeveryneighborbycomparingthegammadistributionparametersofthenodeanditsneighborsbeforeselectinganeighbornodetosubscribeadatasegment.Theabovestepswouldnotincreaselatencyastheyareexecutedbeforethedatasegmentsarereadyattheneighbornodes.Finally,thenode,whichwassubscribedto,sendsthesubscribeddatasegmenttothesubscriberimmediatelywhenithasthedatasegment.ExperimentsshowthatCSMsignificantlyreducesthecontentdatatransmissionlatency.

  • 标签: 国际互联网 分布特点 流动特点 P2P技术
  • 简介:知识要点】本章主要内容有:集合有关概念与运算;函数概念与性质;反函数概念与图象;基本初等函数(幂函数、指数函数、对数函数)的定义、图象和性质;指数方程和对数方程;共含13个知识点.由于它们在高中数学中的显著地位和作用,高考试题中经常出现,这些知识点自...

  • 标签: 能力培养 取值范围 反函数 义域 偶函数 函数的图象