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500 个结果
  • 简介:AHFreceiverfordatatransmissionbasedonKalmanfilterandchannelestimatorisproposed.Thesimulationresultsshowthattheperformanceoftheproposedschemeisabout2dBbetterthanthatofDecision-FeedbackEqualizerbasedonSquare-RootKalmanAlgorithm(SRKA/DFE)anditscomputationalcomplexityislowerthanthatofMaximumLikelihoodSequenceEstimation(MLSE).

  • 标签: adaptive RECEIVER KALMAN filters/HF HIGH-SPEED MODEM
  • 简介:TheRamanspectrafromleukemiccellline(HL60)andnormalhumanperipheralbloodmononuclearceils(PBMCs)areobtainedbyconfocalmicro-Ramanspectroscopyusingnear-infraredlaser(785nm)excitation.Thescanningrangeisfrom500to2000cm-1.ThetwoaverageRamanspectraofnormalPBMCsandcarcinomacellshavecleardifferencesbecausetheirstructureandamountofnucleicacid,protein,andothermajormoleculesarechanged.Thespectraarealsocomparedandanalyzedbyprincipalcomponentanalysis(PCA)todemonstratethetwodistinctclustersofnormalandtransformedcells.Thesensitivityofthistechniqueforidentifyingtransformedcellsis100%.更多还原

  • 标签: 光谱学 黎曼光谱 白血病细胞 激光
  • 简介:《柯林斯词典》今年的“年度词汇”奖选择了环保词汇,“一次性使用(singleuse)”一词获得了2018“年度词汇”的殊荣。

  • 标签: WORD the for IS of 一次性使用
  • 简介:目的:评价单一穴位治疗急性腰扭伤的治疗效果。方法:根据统一的诊断标准,在多个临床中心进行随机对照研究。全部病例320例经随机数字表法分为针刺后溪穴观察纽和针刺腰痛点对照组。对患者的疼痛程度分别由医师和患者进行评分。结果:治疗2个疗程后,观察组和对照组近期有效率分别为89.4%和82.5%,远期有效率分别为95.6%和93.5%。经Ridit分析,近期疗效差异有统计意义(P<0.05),远期疗效差异无统计意义(P>0.05)。结论:针刺单一穴位治疗急性腰扭伤疗效确切,取穴简便,后溪穴疗效好于腰痛点。

  • 标签: 急性腰扭伤 针刺疗法 背痛 腰肌劳损 后溪 腰痛点
  • 简介:Solidificationstructurevariationofsinglephasealloywithundercoolingpriortonucleationhasbeenwidelystudied.Theprogress,especiallyduringthelastdecade,isreviewedsoastogiveacomprehensiveknowledgeforit,inwhichtheemphasesarelaidonthestructureevolutionmechanismandthepotentialapplication.Lastly,thefutureinterestingsubjectsarepresented.

  • 标签: 单相合金 显微组织 冷却 凝固
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  • 简介:ImmunizationwithinactivatedautoreactiveTcells(Tcellvaccination)selectedfromindividual'sownTcellrepertoireprovidesauniqueinvivosettingfortestingimmuneregulationthatisknowntoinvolveinteractionsofavarietyofrelatedsurfacemolecules(1).ItinducesregulatoryimmuneresponsesthatcloselyresembletheinvivosituationwheretheimmunesystemischallengedbyclonalactivationandexpansionofgivenTcellpopulationsinvariousautoimmunediseases.TcellvaccinationprovidesapowerfulmeansofelicitingnaturalreactionsoftheimmunesysteminresponsetoclonalexpansionofTcells,whichcanusedasatherapeuticapproachtosuppressoreliminatespecificpathogenicautoreactiveTcellsinautoimmuneconditions.ClinicaltrialsusingTcellvaccinationtodepleteautoreactiveTcellsinhumanautoimmuneconditionshavebeguntorevealthepathologicrelevanceofvariousautoimmuneTcellpopulationsinthediseaseprocesses,providingauniqueopportunitytotesttheautoimmunetheoriesinaclinicalsetting.Cellular&MolecularImmunology.2004;1(5):321-327.

  • 标签: T细胞 疫苗 免疫疗法 自体免疫疾病 免疫学
  • 简介:Basedonfractalsuperfibersandbinaryfractalfibers,thefollowingobjectivesareapproachedinthispaper:First,theconceptofmultiple-cellelementsisinducedandabstracted.Second,throughmultiple-cellelements,theconstructabilityofregularmultifractalswithstrictself-similaritiesisconfirmed,andtheuniversalityoftheconstructionmodeforregularmultifractalsisproved.Third,throughtheconstructionmodeandmultiple-cellelements,regularmultifractalsaredemonstratedtobeequivalenttogeneralizedregularsinglefractalswithmultilayerfinestructures.Onthebasisofsuchequivalence,thedimensionformulaoftheregularsinglefractalisextendedtothatoftheregularmultifractal,andthegeometryofregularsinglefractalsisextendedtothatofregularmultifractals.Fourth,throughregularmultifractals,afewgoldenfractalsareconstructed.

  • 标签: 多重分形 细胞分子 超级纤维 诱导因素 教学模式 精细结构
  • 简介:Inthepresentstudythemembranefoulinginmicrofiltrationusedforcellharvestinginadeadendsystemhasbeeninvestigated.experimentalresultswereanalysedintermsofexitingmembranefiltrationmodelsandmembraneresistances.Thecakefiltrationmodel(CFM)andstandardblockingmodel(SBM)havebeenconsideredinthisstudy.Variousmembraneresistancesweredeterminedatdifferentprocessingtime,feedconcentrationandstirringspeed.Resistancestopermeationinthissystemincludefiltermedium,poreblocking,adsorption,cakelayerandconcentrationpolarization.

  • 标签: 微型过滤 薄膜堵塞 流动液体
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  • 简介:Thispaperpresentsafunctionallanguagefortheunambiguousdescriptionofdigitalcircuits,amethodandalgorithmstoobtainastandard-celllayout,andacomparativeevaluationofthedevelopedfunctionalstandard-cellplacementtechnique.Thepresentedplacementschemeisdifferentfromtraditionalmethodsbecausethecompletelayoutgrometryisspecifiedandconstructedautomaticallyfromafunctionaldescription.Theconstructionreliesonatranslationthatcombinesthesimplicityofstandard-cellswiththeeleganceoffunctionalprogramming.Anevaluationofthemethodintroducedshowsthatthequalityoftheresultingplacementisclosetotheresultsachievedwithsimulatedannealingwhilethecomputationtimeissignificantlyless.Furthermore,theevaluationsuggeststoemploythefunctionalplacementmethodinconjunctionwithlow-temperaturesimulatedannealingforrunning-timereductionandimprovedresults.

  • 标签: 数字电路 标准元件布局 泛涵语言 半导体工业
  • 简介:Traditionally,thematerialswhichareregardedasantigensrecognizedbyγδTlymphocytesareproteinandcarbohydrate,notnucleicacidorlipid.Recently,ithasbeendemonstratedthatγδTcellscanrecognizelipidAanddirectlyinduceimmuneresponsesthatinvolveCD1(clusterofdifferentiationtype1)familyandTolllikereceptors(TLRs).Thisisareviewabouttheinteracting-mechanism,immunologicaleffectandclinicalapplicationofthem.Cellular&MolecularImmunology.

  • 标签: γδ T细胞 脂质A 免疫学 抗肿瘤作用 抗细菌作用
  • 简介:Programmedcelldeathplaysanimportantroleinmaintaininghomeostasisduringanimaldevelopment,andhasbeenconservedinanimalsasdifferentasnematoesandhumans.RecentstudiesofDrosophilahaveprovidedvaluadleinformationtowardourunderstandingofgeneticregulationofdeath.Differentsignalstriggerthenoveldeathregulatorsrpr,hid,andgrim,thatutilizetheevolutionarilyconservediapandarkgenestomodulatecaspasefunction.Subsequentremovalofdyingcellsalsoappearstobeaccomplishedbyconservedmechanisms.ThesimilaritybetweenDrosophilaandhumanincelldeathsignalingpathwaysillustratethepromiseoffruitfliesasamodelsystemtoelucidatekthemechanismsunderlyingregulationofprogrammedcelldeath.

  • 标签: 果蝇 细胞程序性死亡 遗传调节 自体吞噬