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134 个结果
  • 简介:TheGAMMAparadigmisrecentlyproposedbyBanatreandMetayertodescribethesystematicconstructionofparallelprogramswithoutintroducingartificialsequentiality.ThispaperpresentstwosynchronousexecutionmodelsforGAMMAanddiscusseshowtoimplementthemonMasParMP-1,amassivelydataparallelcomputer.TheresultsshowthatGAMMAparadigncanbeimplementedverynaturallyondataparallelmachines,andveryhighlevellanguage,suchasGAMMAinwhichparallelismisleftimplicit,issuitableforspecifyingmassivelyparallelapplications.

  • 标签: 程序设计 大容量并行计算机 并行运算模型
  • 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:Objective:Todetecttheexistenceofimmunetoleranceinducedbygamma-rayirradiation.Methods:Peritonealcellswereharvestedfrommicesubjectedto5Gy60Cogamma-raytotalbodyirradiationat3d,7d,15dand30d,thentheircounts,morphologicalchangesandIL-12geneexpressionwereinvestigated.Results:Afterirradiation,theperitonealcellsweresharplyreduced,thecellmorphologyshiftedfromround-liketopolymorphicandfusiformwithsomeprocesses,expressionofIL-12p35wasseriouslysuppressed,whilethatofIL-12p40greatlyenhanced.Conclusion:Ourdatahighlysuggestthatthegamma-rayirradiationcouldpotentiallyinducedendriticcell(DC)commitmentandimmunetolerance.

  • 标签: 伽玛刀 免疫耐受性 树突状细胞 白细胞介素-12
  • 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:股骨粗隆间骨折是老年人常见的骨折,随着人口的老龄化,老年人粗隆间骨折发生率逐年提高。有效治疗股骨粗隆间骨折,对提高老年患者的生活质量,挽救老年人生命有积极的意义。对有手术指征的股骨粗隆间骨折进行手术是目前治疗方法的首选。我院自2003年1月至2006年7月应用Gamma钉治疗股骨粗隆间骨折17例,取得较满意效果。

  • 标签: 股骨粗隆间骨折 GAMMA钉治疗 手术指征 骨折发生率 老年人 有效治疗
  • 简介:Targetplasmas,onwhichtheformationoftheelectrostaticpotentialsandtheim-provementoftheconfinementarestudied,areproducedwithICRFintheGAMMA10tandemmirror.Theiontemperatureofmorethan10keVhasbeenachievedinrelativelylowdensityplasmas.WhenthestrongICRFheatingisapplied,itisobservedthatthehighfrequencyandthelowfrequencyfluctuationsareexcitedandsuppresstheincreaseoftheplasmaparameters.Recently,anewhighpowergyrotronsystemhasbeenconstructedandtheECRHpowerinplugextendsupto370kW.Theimprovementoftheconfinementduetotheformationofthepotentialintheaxialdirectionandthestrongradialelectricfieldshearhasbeenobserved.

  • 标签: ICRF实验 等离子体 涨落 位势构成 振动陀螺仪
  • 简介:摘要过氧化物酶体增殖物激活受体&gamma;(peroxisomeproliferator-activatedreceptorgamma,PPAR&gamma;)是一种配体依赖的核转录因子,在脂肪形成、糖代谢、炎症反应、肿瘤及内环境稳定等多种生物学过程中发挥重要作用。近年来关于PPAR&gamma;翻译后修饰对机体调控机制的研究越来越多。研究发现PPAR&gamma;有多种翻译后修饰,主要包括磷酸化、泛素化、小泛素相关修饰物化(smallubiquitin-relatedmodifiermaterialized,SUMO)、乙酰化、亚硝基化与硝基化等。本文主要对翻译后修饰对PPAR&gamma;功能的调控作一综述。

  • 标签: PPAR&gamma 磷酸化 泛素化 SUMO化 乙酰化 亚硝基化与硝基化
  • 简介:相对于抗生素及维生素在上世纪的盛行,在21世纪,有一个更重要的医药产业发展,那就是PPAR分子(过氧化物酶体增殖物激活受体)的被发现。PPAR是21世纪生物医学上发现的最重要分子之一,它对本世纪最重要的几种人类疾病(糖尿病、血脂紊乱、高血压、心脏病、癌症等)都有独到的功效。

  • 标签: PPAR 糖尿病 过氧化物酶体增殖物激活受体 健康 医药产业发展 生物医学
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  • 简介:Aninfraredimagedetailenhancementmethodbasedonlocaladaptivegammacorrection(LAGC)isproposed.ThelocaladaptivegammavaluesaredesignedbasedontheWebercurvetoenhanceeffectivelytheimagedetails.Subsequently,theactivegrayscalerangeoftheimageprocessedbyLAGCisfurtherextendedbyusingourproposedhistogramstatisticalstretching.Theexperimentalresultsshowthattheproposedalgorithmcouldconsiderablyincreasetheimagedetailsandimprovethecontrastoftheentireimage.Thus,ithassignificantpotentialforpracticalapplications.

  • 标签: 图像细节 伽玛校正 自适应 红外 直方图统计 增强方法
  • 简介:Thisstudyinvestigatedtheeffectofgammaradiationonthedigestibilityandfunctionalpropertiesofricestarch.RicecultivarsIRGA417andIAC202wereusedforisolationofstarchbythealkalinemethod.Starchsampleswereirradiatedwith1,2and5kGydosesof60Coatarateof0.4kGy/h.Acontrolsample,whichwasnotirradiated,wasusedforcomparison.Irradiatedandcontrolstarcheswerecharacterizedbyinvitrostarchdigestibility,totaldietaryfiber,color,waterabsorptionindex,watersolubilityindex,syneresis,swellingfactor,amyloseleaching,pastingpropertiesandgelfirmness.Irradiationschangedstarchdigestibilitydifferentlyineithercultivar.Increasingradiationdosespromotedincreaseinthecolorparameterb*(yellow),elevationinthecapacitytoabsorbwater,andsolubilityinwateraswellastheamyloseleachedfromgranulesforbothcultivars.Pastingpropertiesshowedadecreasethatwasproportionaltothedoseapplied,causedbythedepolymerizationofstarchmolecules.GelfirmnessofthestarchfromIAC202wasinverselyproportionaltotheradiationdoseapplied,whereasforIRGA417,therewasareductionat5kGydose.Ricestarchescanbemodifiedbyirradiationtoexhibitdifferentfunctionalcharacteristicsandtheycanbeusedbythefoodindustriesinproductssuchassoups,desserts,flans,puddingsandothers.

  • 标签: ORYZA SATIVA irradiation viscosity SWELLING AMYLOSE