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78 个结果
  • 简介:Retinoblastoma(RB)isthemostcommonintraocularcancerofinfancyandchildhood.ThiscancerisinitiatedbymutationonRB1,thetumorsuppressorgenethatisresponsiblefortheregulationofbothcellcycleandgnomestabilityinretinalcells.PatientswithaconstitutionalmutationonRB1canbeinherited.RBoccursapproximately1inevery15000-20000livebirths.Theworldwidemortalityforthiscancerisabout5%-11%.However,thisraterisestoabout40%-70%indevelopingcountriesduetoadelayindiagnosis.Awidevarietyofoptionsareavailableforthetreatment,butoftenacombinationoftherapiesisadoptedtooptimizeindividualizedcare.

  • 标签: RETINOBLASTOMA RETINOBLASTOMA 1 GENE leukocoria EPIDEMIOLOGY
  • 简介:Letl1,l2,…,lgbeevenintegersandxbeasufficientlylargenumber.Inthispaper,theauthorsprovethatthenumberofpositiveoddintegersk≤xsuchthat(k+l1)2,(k+l2)2,…,(k+lg)2cannotbeexpressedas2n+pαisatleastc(g)x,wherepisanoddprimeandtheconstantc(g)dependsonlyong.

  • 标签: 猜想 正奇数 奇素数 LG 整数
  • 简介:Voiding机能障碍例如冲动频率症候群,主张不能自制,压力不能自制和unobstructive尿保留,对pharmacotherapy经常倔强。电的neuromodulation证明了为这些状况有益。作为电的neuromodulation的一治疗,Electroacupuncturepudendal神经刺激(杀虫剂的一种)为voiding机能障碍是有益的。杀虫剂的一种的表演和申请将在这篇文章被介绍。

  • 标签: 针灸治疗 长刺破治疗 ELECTROACUPUNCTURE Pudendal 神经刺激 Voiding 机能障碍 R246.1
  • 简介:如果,复杂、方形的矩阵E被称为coninvolutory$\barEE=I$,在$\barE$表示建筑群的地方,矩阵E结合并且我是一个身份矩阵。在这份报纸,我们介绍一个复杂矩阵的coninvolutory分解并且为计算coninvolutory因素调查一次牛顿重复。一个简单数字例子说明我们的结果。

  • 标签: 单位矩阵 迭代计算 矩阵分解 共轭矩阵 方阵 牛顿
  • 简介:ApplyingLagrange–Germain'stheoryofelasticthinplatesandHamiltonianformulation,thedynamicsofcantileverplatesandtheproblemofitsvibrationcontrolarestudied,andageneralsolutionisfinallygiven.BasedonHamiltonianandLagrangiandensityfunction,wecanobtaintheflexuralwaveequationoftheplateandtherelationshipbetweenthetransverseandthelongitudinaleigenvalues.Basedoneigenfunctionexpansion,dispersionequationsofpropagationmodeofcantileverplatesarededuced.Bysatisfyingtheboundaryconditionsofcantileverplates,thenaturalfrequenciesofthecantileverplatestructurecanbegiven.Then,analyticsolutionoftheprobleminplatestructureisobtained.Anhybridwave/modecontrolapproach,whichisbasedonbothindependentmodalspacecontrolandwavecontrolmethods,isdescribedandadoptedtoanalyzetheactivevibrationcontrolofcantileverplates.Thelow-order(controlledbymodalcontrol)andthehigh-order(controlledbywavecontrol)frequencyresponseofplatesarebothimproved.Thecontrolspilloverisavoidedandtherobustnessofthesystemisalsoimproved.Finally,simulationresultsareanalyzedanddiscussed.

  • 标签: 振动控制 悬臂板 HAMILTON 独立模态空间控制 混合 振动主动控制
  • 简介:ThispaperbrieflyintroducestheSeismotectonicMapofXinjianganditsneighborhoodinthescaleof1∶2500000.Themapisamended,supplementedandexpandedbasedofthenewlycompiledSeismotectonicMapofXinjianginscale1∶1000000.ThebasemapofthisseismotectonicmapisthegeologicmapofwesternChinaanditsneighborhoodcompiledbyLiTingdong.Theabundantnewmaterialsfromrelatedresearch,referentialliteraturesandtheanalysesonremotesensingdatawereusedinthecompilingwork.Adatabaseandrelevantdocumentsarebuiltfornearly300activefaultsand150activefolds.Thebasicinformationofthemajoractivefaults,especiallythoseneartheborderareasinthismapareintroducedinthispaper.

  • 标签: 构造图 地震 新疆 邻域 中国西部 编制工作
  • 简介:Thetransportationindustryisanessentialsectorforcarbonemissionsmitigation.ThispaperfirstlyusedtheLMDI(LogarithmicMeanDivisiaIndex)decompositionmethodtoestablishfactorsdecompositionmodelonChina’stransportationcarbonemission.Then,aquantitativeanalysiswasperformedtostudythefactorsinfluencingChina’stransportationcarbonemissionsfrom1991to2008,whichareidentifiedastransportationenergyefficiency,transportationstructureandtransportationdevelopment.Theresultsshowedthat:(1)Theimpactoftransportationdevelopmentontransportationcarbonemissionsshowedpullingfunction.Itscontributionvaluetocarbonemissionsremainedathighgrowthsince1991andshowedanexponentialgrowthtrend.(2)Theimpactoftransportationstructureontransportationcarbonemissionsshowedpromotingfunctioningeneral,butitsroleinpromotingcarbonemissionsdecreasedyearbyyear.Andwiththecontinuousoptimizationoftransportationstructure,thepromotingeffectdecreasedgraduallyandshowedtheinversed"U"trend.(3)Theimpactoftransportationenergyefficiencyontransportationcarbonemissionsshowedafunctionofinhibitionbeforepulling.Inordertopredictthepotentialofcarbonemissionreduction,threescenarioswereset.Analysisofthescenariosshowedthatifgreaterintensityemissionreductionmeasuresaretaken,thecarbonemissionswillreduceby31.01milliontonsby2015andby48.81milliontonsby2020.

  • 标签: TRANSPORTATION carbon EMISSIONS emission REDUCTION POTENTIAL
  • 简介:Mileage-basedpricinginsurance,suchasPAYD,isknownasthe'greeninsurance'becauseitislow-carbonandenvironmentallyeffective,whichisthebiggestinnovationintheglobalautoinsuranceindustryseeninthepastdecade.Startingfromtheperspectiveofeconomicexternalities,vehiclenegativeexternalitiesinChinaaredescribed.Inordertointroducemileage-basedpricinginsurancetotheChineseinsuranceindustry,thispaperreviewsthecurrentpracticeofPAYDinsuranceanditsimpactsontransportexternalities,includingairpollution,climatechange,energydependency,congestion,accidents,andothers.Finally,enlightenmentandpolicysuggestionsareproposed,inthehopeofbetterpromotingthelow-carboneconomydevelopmentoverthewholeofChina.

  • 标签: mileage-based PRICING INSURANCE externalities low-carbon economy
  • 简介:Asatypicalcleanandrenewableenergy,windpowerisbecomingmoreandmorewidelyusedinelectricalindustry.However,itscharacteristicsofrandomandintermittenthavebroughtseriousproblemstothepowersystem,suchasvoltagefluctuationandinsufficientreactivepower.BasedontheK-meansclusteringalgorithm,thispaperclassifiesthedoubly-fedinductiongenerators(DFIG)accordingtotheoperationofpropellerpitchanglecontrol.Atthesametime,toobtaintheoptimalparameter,advancedparticleswarmoptimization(PSO)isused.ThenthedynamicmodelofDFIGunderthenetworkfaultconditionisbuilt.Whatismore,therolethatcrowbarcircuitplaysinlowvoltageridethrough(LVRT)isdiscussed.Finally,simulationsinDigSILENTverifythemodel.

  • 标签: 风力发电 低电压 能力模型 双馈电机 K-均值聚类算法 双馈感应发电机
  • 简介:基于中国908工程的最近的海底的地形学数据(中国近海海洋的环境全面调查和评价),我们分析了一般中国近海影响它的发展的海底的地形学的特征和因素。离开中国的海岸的海底的地形学跟随陆地地形学的NW-SE趋势。海底的地形学的坡度与大约0.8%的一个平均坡度从0.2%~1.6%。深度轮廓与海岸变主要平行,并且在河口区域伸出到海。海底的地形学被地质的结构统治,它证明二的典型特征高举并且从北方的二个沉淀事件到向南。与不同沉积环境和复杂水动力学条件相结合的地质的结构生产了能被三种类型描绘的地形学:沉积的盆,压缩高举,和转变形式。在沉积的盆和压缩高举区域,地形学的波动是小的,沉积是有细密纹理的,并且水流流动在一个单个方向,导致有沉积平原的海湾并且在水下累积倾斜,它具有一样的构造起源。转变类型地形学被强壮的波动和混合尺寸沉积描绘粒子,平台和沿海的陡坡和架平原和侵蚀免职地形近海。这是不完全的差错块开发的结果并且重复违反。在免职改革区域(转变形式类型),地形学有强壮的波动,沉积是粗糙的,潮汐的沙山脉在源自陆地供应的河口和集中地区是开发得好的,并且Holocene沉积是厚的,由潮,河流量,和水流转变了。

  • 标签: 海底地形 海岸类型 中国近海 特征和 沉积环境 地形起伏
  • 简介:Bonedefectisoneofthemostcommondiseasesinclinic.Existingtherapeuticapproacheshaveencounteredmanyproblems,suchaslackofautogenousallogeneicboneandimmunologicalrejectiontoallogeneicimplant.Synthetichydroxyapatite(HA)providedsolutionsforbonerepair,sincetheHAisthemaininorganiccomponentofanimals'bone.AlthoughHAhasgoodbiocompatibility,butonlythelimitedosteogeniccapability,whichisofsignificanceformodernbonerepairmaterials.Siisanessentialtraceelementinbonetissue,andithasbeendemonstratedtobeabletopromoteboneformation.Therefore,silicate-dopedhydroxyapatite(Si-HA)mayserveasapromisingmaterialforbonerepair,andpromoteboneregenerationintherepair.ThecurrentreviewdiscussesdevelopmentofSi-HA,focusingonitspreparationandcharacterization,invitroandinvivoevaluationsofthematerial,positiveeffectofSi-HAonpromotingboneformationinclinicalapplications,andmolecularmechanisminvestigationofsuchpromotiveeffect.

  • 标签: silicate-doped HYDROXYAPATITE (Si-HA) OSTEOGENESIS collagen BIOSYNTHESIS
  • 简介:1.Introduction*SincethefirsttimeEasterIslandwasexplored,scholarshavebeenarguingandspeculatingaboutthedateofthenatives’arrival,thenatureandpurposeofthelargerstatues,itsactualnumberofinhabitants,thereasonsfortheprogressivedeforestationoftheisland,etc.Allofthishasreceivedvariousexplanationswhichareconsideredinfluentialfactorsindeterminingsocialandculturalchangesinthelivesoftheislanders(aquestiontobesurveyedinthelastsectionofthisarticle.)However,thelackofsufficientdatamakesitdifficulttoreachtoadefinitiveconclusion;thebestthatwecanhopeforistogivereasonableandtemptativehypotheses.

  • 标签: 复活节岛 文化 演化 毁灭
  • 简介:UE-Bézier(unifiedandextendedBézier)basisistheunifiedformofBézier-likebases,includingpolynomialBézierbasis,trigonometricpolynomialandhyperbolicpolynomialBézierbasis.SimilartotheoriginalBézier-likebases,UE-Bézierbasisfunctionsarenotorthogonal.Inthispaper,agroupoforthogonalbasisisconstructedbasedonUE-Bézierbasis.ThetransformationmatricesbetweenUE-Bézierbasisandtheproposedorthogonalbasisarealsosolved.

  • 标签: 基础构造 正交化 转换矩阵 三角多项式 变换矩阵 正交基