学科分类
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349 个结果
  • 简介:在低频率改正测量头相关的转移功能(HRTF)的一个方法被建议。由在低频率从球形的头模型分析HRTF,在400Hz的频率下面,HRTF的大小是将近不变的,阶段为远、近的地两个都是频率的线性功能,这被证明。因此,如果在400Hz上面的HRTF被实验精确地测量,它能由理论模型在低频率改正HRTF。计算和主观实验的结果证明建议方法的可行性。

  • 标签: 低频特性 传递函数 头部 测量实验 线性函数 HRTF
  • 简介:Anefficientmulti-blockincompressibleviscousflowsolverbasedonsolvingtheReynolds-AveragedNavier-Stokes(RANS)equationsnumericallyhasbeendevelopedthatcanbeappliedtosimulationofavarietyofshipmaneuveringrelatedflowsandcalculationofhydrodynamicforces.Validationandverificationofthesolutionprocedurewerecarriedoutonseveralmodelproblemswithgoodagreementtoexperimentalandnumericalresults.

  • 标签: 船舶机动 粘性流体 流体力学 数值仿真 计算机虚拟现实
  • 简介:Objective:Toinvestigatetheexpressionofimmune-relatedmoleculesinglioblastomamultiform(GBM)cells.Methods:Theexpressionofmajorhistocompatibilitycomplex(MHC),β2-microglobulin,Fas,CD80andCD86moleculesonthesurfaceofGBMcellswereevaluatedbyflowcytometry.TheexpressionofTAP-1,TAP-2andTapasinintheGBMcellswereevaluatedbyRT-PCRmethod.Results:MHCclassⅠ,β2microglobulin,TAP-1,TAP-2andtapasinwereexpressedinmostGBMcelllines.ExceptU87,therewasnoMHCclassⅡmoleculeexpressiononanyoftheotherGBMcelllines.FaswasexpressedonalltheGBMcelllinesexamined.Conclusion:ThemechanismbywhichGBMescapesimmunesurveillancemayinvolvedownregulationofexpressionofMHCclassⅠmoleculesandMHCclassⅡmolecules.MHCclassⅠpositiveGBMmaybethesuitabletargetofimmunotherapy.

  • 标签: 多形性恶性胶质瘤 主要组织相容性复合体 免疫功能 Β2-微球蛋白 CD80 CD86
  • 简介:Globalmitigativeandadaptiveeffortshavenotbeenabletoeffectivelyaddresstheadverseimpactscausedbyclimatechange.Therefore,adirectsolutionisneededtoaddressthesignificantresultinglossanddamage(L&D).DuringtheUnitedNationsFrameworkConventiononClimateChangeheldinDohain2012,theissueofrespondingtoL&Darisingfromclimatechangegainedsuddentractionandbecameoneofthekeyissuesthataffectedtheoutcomeoftheconvention.Inthispaper,astudyonthedefinitionandconnotationsofL&Darisingfromclimatechangewasconducted,togetherwithananalysisofitsrelationshipwithrelatedconcepts,namelyimpacts,vulnerability,andrisks.ThisledtotheproposalofanL&Dconceptualmodelthatismorecomprehensive,withtherecognitionoftheneedtoaddresstheissuethrougheffectivesupplementationofexistingmitigativeandadaptiveefforts.AsystematicelaborationofanL&Dresponsemechanismwasmadebasedonpolitics,law,andthemarket,leadingtoapreliminarypresentationofapossibleformatforanL&Dmechanism.PotentialacademicresearchdirectionsforL&DwerealsoproposedthatcouldserveasreferencesfortheestablishmentofinternationalandnationalL&Dresponsemechanismsandrelatedresearch.

  • 标签: CLIMATE CHANGE LOSS and DAMAGE connotations
  • 简介:Ourpreviousreportshaveshownthatlamininglycopeptides(LN-GPs),thetotalglycopeptidespreparedfromlaminin(LN),canpreventtheexperimentallungmetastasisandlivermetastasisofmousecancercells.Inordertoexploretheanti-metastaticmechanismofLN-GPs,westudiedtheeffectsofLN-GPsonmetastasisrelatedbehaviorsofcancercellsinvitro.LN-GPsdidnotaffectcellsurvival.However,LN-GPsinhibitedcellattachmentandspreadingofS180cellsonLN-andMatrigelsubstrateindose-dependentandtime-dependentmanners.Moreover,inhibitionofcellattachmentandspreadingonMatrigelsubstratesweremuchgreateronMatrigelsubstratethanonLNsubstrate.InthegresenceofLN-GPs,S180cellsonLNsubstratechangedfromaflattenedpolygonalshapetoaroundone,themigrationofS180cellsonLNsubstratedecreased,andthenumberofahighlyinvasivehumanpulmonarygiantcarcinomaPGcellsinvadingMatrigelfilterinaBoydenchamberwasreduced.LN-GPsthushavemultipleinhibitoryeffectsoncancermetastasisrelatedbehaviors.

  • 标签: LAMININ 癌细胞转移 相关行为 非胶原糖蛋白 LN-GP
  • 简介:Alaboratory-basedaerobicincubationwasconductedtoinvestigatenitrogen(N)isotopicfractionationrelatedtonitrificationinfiveagriculturalsoilsafterapplicationofammoniumsulfate((NH4)2SO4).Thesoilsampleswerecollectedfromasubtropicalbarrenlandsoilderivedfromgranite(RGB),threesubtropicaluplandsoilsderivedfromgranite(RQU),Quaternaryredearth(RGU),QuaternaryXiashuloess(YQU)andatemperateuplandsoilgeneratedfromalluvialdeposit(FAU).Thefivesoilsvariedinnitrificationpotential,beingintheorderofFAU>YQU>RGU>RQU>RGB.SignificantNisotopicfractionationaccompaniednitrificationofNH+4.δ15NvaluesofNH+4increasedwithenhancednitrificationovertimeinthefouruplandsoilswithNH+4addition,whilethoseofNO-3decreasedconsistentlytotheminimumandthereafterincreased.δ15NvaluesofNH+4showedasignificantlynegativelinearrelationshipwithNH+4-Nconcentration,butapositivelinearrelationshipwithNO-3-Nconcentration.TheapparentisotopicfractionationfactorcalculatedbasedonthelossofNH+4was1.036forRQU,1.022forRGU,1.016forYQU,and1.020forFAU,respectively.Zero-andfirst-orderreactionkineticsseemedtohavetheirlimitationsindescribingthenitrificationprocessaffectedbyNH+4inputinthestudiedsoils.Incontrast,Nkineticisotopefractionationwascloselyrelatedtothenitrifyingactivity,andmightserveasanalternativetoolforestimatingthenitrificationcapacityofagriculturalsoils.

  • 标签: 同位素分馏 农业土壤 硝化能力 氨氮 一级反应动力学 第四纪红土
  • 简介:<正>Purpose:Todeterminetheintra-testerreliabilityofclinicalmeasurementsthatassessfivecomponentsrelatedtocorestability:strength.endurance,flexibility,motorcontrol,andfunction.Methods:Participantswere15college-agedmaleswhohadnotsufferedanyorthopedicinjuryinthepastyear.Corestrengthmeasurementsincludedeightisometrictestsandasit-uptest.Thefourcoreendurancetestswerethetrunkflexortest,trunkextensortest,andbilateralsidebridgetests.Flexibilitytestsincludedthesit-and-reachtestandactiverangeofthetrunkandhipjointmotions.Proprioceptionviapassiverepositiontestsofthehipsandasinglelimbbalancetestonanunsteadyplatformwereusedtoevaluatecoremotorcontrol.Functionalmeasurementsconsistedofasquattestandasingleleghoptestfortimeanddistance.Measurementswereperformedduringtwodatacollectionsessionswithaweek’srestbetweenthesessions.Intra-classcorrelationcoefficientswerecalculatedtoestablishreliability.Results:Theoverallintra-raterreliabilityforallcorestabilityrelatedmeasurementsrangedfromlow(ICC=0.35,lefthipreposition)toveryhigh(ICC=0.98,sit-and-reach).Asagroup,thecoreendurancetestswereobservedtobethemostreliable.Conclusion:Therearehighlyreliabletestsineachofthefivegroups.Overall,coreendurancetestsarethemostreliablemeasurements,followedbytheflexibility,strength,neuromuscularcontrol,andfunctionaltests,respectively.

  • 标签: CORE stability ENDURANCE Reliability Strength
  • 简介:Deareditor,Itiswithgreatinterestthatwereadthearticle“Relationshipofcalcitoningene-relatedpeptidewithdiseaseprogressionandprognosisofpatientswithseveretraumaticbraininjury”(Chenetal.,2018).Inthisstudy,theauthorsevaluated121patientswhoweredividedintomild/moderatetraumaticbraininjury(TBI)(n=61),severeTBI(n=35)andcontrol(n=25)groups,andmeasuredserumlevelsofcalcitoningene-relatedpeptide(CGRP)andserumendothelin-1(ET-1).TheyfoundthatlowlevelsofCGRPandhighlevelsofET-1wereassociatedwithhighmortalityat6months.IdentificationofmorphologicalabnormalitiesonCTscansisveryimportantforevaluatingpatientswithTBIbecausedifferentdiagnosesaremadebasedondifferentimagingfindings(Maasetal.,2005).

  • 标签: CALCITONIN gene-related PEPTIDE TRAUMATIC BRAIN INJURY
  • 简介:In1980'sdifferentialgeometricmethodsaresuccessfullyusedtostudycurvedexpomentialfamiliesandnormalnonlinearregressionmodels.Thispaperpresentsanewgeometricstructuretostudymultinomialdistributionmodelswhichcontainasetofnonlinearparameters.Basedonthisgeometricstructure,thesuthorsstudyseveralasymptoticpropertiesforsequentialestimation.Thebias,thevarianceandtheinformationlossofthesequentialestimatesaregivenfromgeomentricviewpoint,andalimittheoremconnectedwiththeobservedandexpectedFisherinformationisobtainedintermsofcurvatvremeasures.Theresultsshowthatthesequentialestimationprocedncehassomebetterpropertieswhicharegenerallyimpossiblefornonsequentialestimationprocedures.

  • 标签: 多项式分布模型 统计曲线 连续估计 Fisher信息
  • 简介:由使用DDRT-PCR和EST片断结扎,新奇老鼠胸腺复杂物联系了基因Rwddl被识别。读的框架编码了在N终点包含了一个RWD领域的243氨基酸残余的蛋白质。在胸腺的Rwddl表示在年老、氧化地强调的鼠标被减少。在thymocytes和thymic广泛地被表示被发现上皮的房间。Rwddl的表示水平能影响雄激素受体(AR)的transactivation活动在短暂地transfectedthymic上皮的房间。然而,没有直接相互作用能被荧光回声精力转移检测(烦恼)分析。在结论,Rwddl是胸腺复杂物可以间接地影响AR发信号的相关蛋白质小径。细胞与分子的免疫学。2008;5(4):279-285。

  • 标签: 胸腺 老化过程 Rwddl 男性荷尔蒙受体
  • 简介:Themultiple-beddedcharacteristicsofthecrustandmultiple-stagenature(geosyncline-platform-diwa)ofthetectoicevolutionarctectonicprcrequisitcsfortheformationandevolutionofthegranitoidsandthcirtungstenmineralizationinJiangxi.ControlledbythemultiPlc-stagetectonicevolution,allthegranitoidsofdiffcrcntgeo1og

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  • 简介:AbstractMore evidences show that microRNAs play an important role in the pathogenesis of inflammation and autoimmune diseases including Lichen planus, and are an attractive therapeutic target. MicroRNA family plays an important role in the regulation of gene expression, which involves cell proliferation, apoptosis, growth, differentiation and metabolism, vascularization, immune response and other biological processes. The changes of expression profile and expression level are closely related to the occurrence and development of many diseases, such as tumor, inflammatory disease and autoimmune disease relevant. However, there are few reports on microRNA in the pathogenesis of LP. This review summarizes the research advance of microRNAs (microRNAs -137, microRNAs -125b, microRNAs -138, microRNAs-27b, microRNAs -203) and their downstream proteins in LP.

  • 标签: lichen planus pathogenesis microRNAs
  • 简介:InstudyingLocalharmonicanalysisonthesphereS",R.S.Strichartzintroducedcertainzonabfunctionsid(x,y))whichsatisfytheequation

  • 标签: 二外 万县
  • 简介:我们在异构的表面上学习流电的水流。在电气化学,生产水流的氧化减小反应被一个非线性的椭圆形的边界价值问题通常建模。边界条件具有有周期性地改变参数的指数的类型。我们由首先一致构造近似这个问题,然后关于一致答案线性化。这近似比以前的近似或直接linearization更加精确。我们为两个建立集中估计二并且三维的大小写并且提供二维的数字实验。

  • 标签: 非线性椭圆方程 边值问题 电流腐蚀 边界条件