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117 个结果
  • 简介:Echocardiographyisthemostfrequentlyusedimagingmodalitytodeterminecardiacfunction.Leftventricularejectionfractionthemostwidelyusedparameterforevaluationofsystolicfunction,providesimportantprognosticvalueinclinicalpractice,andformspartoftheevidencebaseformanydecisionsaboutcardiovascularcare.However,ejectionfractionhasseveralsubstantiallimitationsandisinsensitivetosubtlechangesinsystolicfunction.Theassessmentofmyocardialdeformationwithechocardiographyhasbeenstudiedfortwodecades,andisincreasinglyusedintheclinicalsetting.Thistechniquecanpreciselycharacterizethemechanicsofmyocardialcontractionandrelaxation.Themostcommonlyusedparameterisgloballongitudinalstrain,whichismoresensitivethanejectionfractionforthemeasurementofsystolicfunction.Thisreviewfocusesontheprognosticvalueofgloballongitudinalstraininpredictingadverseoutcomesincardiovasculardisease.

  • 标签: CARDIOVASCULAR deformation EJECTION FRACTION LEFT VENTRICLE
  • 简介:Objective:Establishnormativedatafortympanicelectrocochleography(TMECochG)parametersinnormalhearingadultswithoutMeniere'sdisease's(MD)symptoms.DescribeTMECochGvariablesthathelptodistinguishnormalfromMDears.Materialandmethods:Weenrolled100subjects(N?200ears),59females,agedbetween19and71yearsfrom09/2010to04/2014.Inclusioncriteria:normalotomicroscopy,hearingthresholds25dBnHLfrom250to4000Hz,normaltympanogram,nosymptomsofMDaccordingtotheAAO-HNS1995criteriaandGibson'sscore<7.Weexcludedsubjectswithdizziness,auralfullnessorothersymptomsofendolymphatichydrops.Thefollowingparameterswereanalyzed:SP/APamplituderatio,SP/AParearatioandthedifferencebetweenAPlatencywithrarefactionandcondensationstimuli.Results:Therewasnosignificantdifferencebetweenrightandleftears(Intraclasscorrelationcoefficient<0.6).SP/APamplituderatiovariedbetween0.084and0.356andSP/AParearatiobetween0.837and1.671(percentiles5and95).TheAPlatencydifferencetorarefactionandcondensationclickswasbetween0.0and0.333ms.Conclusion:NormativedataforTMECochGparameterswereestablishedin100normalhearingsubjectswithoutMD.Thesedatacanbeusedtodistinguishnormalfrompathologicalfindingsandinfollow-upofMDpatients.

  • 标签: ELECTROCOCHLEOGRAPHY Meniere DISEASE HEARING DIZZINESS TINNITUS
  • 简介:Thephysicalmeasuresofmacroscopicseismicintensityhavebeenextensivelystudiedbasedonthenewunderstandingofseismicintensityandthenewanalyticalmethodandnewdatabaseofstronggroundmotion.Newphysicalmeasuresofseismicintensityhavebeenproposed.

  • 标签: ACCELERATION SRSS method SEISMIC INTENSITY
  • 简介:ForanyirreduciblecomplexprojectivevarietyA,weprovethatinthenonstandardex-tension~*AofAinapolysaturatedmodel,thesetofpointswhicharenotgenericpointsofAhasLoebmeasurezero.ThisissimilartotheSardtheoremassertingthatthecriticalvaluesofasmoothmaphaveLebesguemeasurezero.

  • 标签: GENERIC POINT Loeb MEASURE
  • 简介:Inthispaper,alemmaasanewmethodtocalculatetheHausdorffmeasureoffractalisgiven.AndthentheexactvaluesofHausdorffmeasureofaclassofSierpinskisetswhichsatisfybalancedistributionanddimension≤1areobtained.

  • 标签: 估量 不规则碎片形 平衡 收入 支出
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  • 简介:在这份报纸,从钱的时间价值的观点,我们与折扣因素为公事包向量学习风险措施。为公事包向量的现金subadditive风险措施被建议。表示结果被是凸的分析并且扩大空间的二个不同方法给。特别,凸的分析的方法做推理和表示结果的线更简单。同时,看到向量也被介绍,并且在他们之间的关系被调查并且为公事包提交风险措施。

  • 标签: 现金 subadditivity 冒险措施 凸的分析 公事包向量
  • 简介:作者为可能非加倍,但是满足某些生长条件的氡措施给Morrey空格的一个自然定义,并且在泛音分析和他们的珍视向量的扩展在一些古典操作符的这些空格调查围住的海角。

  • 标签: MORREY空间 双重测量 向量值 清晰度 有界性
  • 简介:定义一个线性领唱者设置了C是线性重申的功能系统f_j(x)=r_jx+b_j的引起注意的人(j=1,2,...,N),在线上令人满意强壮的分开的条件。为关于C的失衡的措施,我们学习集中上面并且为φ(t的集中的更低的密度)有奇异选择并且与s的自然选择的=t~s。

  • 标签: 密度 不均衡测量 函数系统 自然选择
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  • 简介:Themultifractalformalismforsinglemeasureisreviewed.Next,amixedgeneralizedmultifractalformalismisintroducedwhichextendsthemultifractalformalismofasinglemeasurebasedongeneralizationsoftheHausdorffandpackingmeasurestoavectorofsimultaneouslymanymeasures.Borel-CantelliandLargedeviationsTheoremsareextendedtohigherordersandthusappliedforthevalidityofthenewvariantofthemultifractalformalismforsomespecialcasesofmulti-doublingtypemeasures.

  • 标签: HAUSDORFF测度 多重分形 形式主义 混合 评论 偏差定理
  • 简介:SinceChinabegantopursuethepoliciesofreformandopening,itsironandsteelindustryhasbeenfollowingthestrategicprincipleofmakinguseof"tworesources,twomarketsandtwokindsoffunds,"andhasmadeeyecatchingprogressinexpandingopeningtotheoutsideworldandinternationalcooperation.In1993,theindustryutilizedsomeUS$900millioninforeigncapital,

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  • 简介:§0.IntroductionLetXbearealseparableBanachspaceandX*beitsdualspace,LetB(X)betheBorelfield,i.e.,thetopologicalσ-field.Afunctionalu:X→R’iscalledaboundedsmoothfunctional,ifn∈N,f1,…,fn∈X*andφ∈Cb∞(Rn),suchthat

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  • 简介:Thispaperstudiesthecontrollabilityandobservabilitymeasuresofstructuralvi?brationandacousticradiationandproposesameasureofmodalobservabilitybasedonacousticpressureoutputsandmeasuresofcontrollabilityandobservabilityofacousticradiationbycombiningthemeasuresofmodalcontrollabilityandobservabilityofvibrationmodeswithcorrespondingmodalacousticradiationefficiencies.Aplatewithcontrolforceinputsandvibrationalresponseoutputsandacousticpressureoutputsisinvolvedtoshowthemodalcontrollabilityandobservabilitymeasuresofvibrationmodesandmeasuresofcontrollabilityandobservabil?ityofstructuralvibrationandacousticradiation.Observabilitymeasuresbasedonvibrationalresponseoutputsandacousticpressureoutputsarecomparedandtheemphasisisonthemea?suresbasedontheacousticpressureoutputs.Finallytheapplicationandusefulnessofthecontrollabilityandobservabilitymeasurestoactivecontrolofstructuralvibrationandacous?ticradiationareillustratedandcompared.Itshowsthatthecontrollabilityandobservabilitymeasuresprovideusefulguidanceforactivecontroldesignespeciallyinoptimalactuatorandsensorplacement.

  • 标签: VIBRATIONAL modal outputs actuator acous EMPHASIS