简介:Echocardiographyisthemostfrequentlyusedimagingmodalitytodeterminecardiacfunction.Leftventricularejectionfractionthemostwidelyusedparameterforevaluationofsystolicfunction,providesimportantprognosticvalueinclinicalpractice,andformspartoftheevidencebaseformanydecisionsaboutcardiovascularcare.However,ejectionfractionhasseveralsubstantiallimitationsandisinsensitivetosubtlechangesinsystolicfunction.Theassessmentofmyocardialdeformationwithechocardiographyhasbeenstudiedfortwodecades,andisincreasinglyusedintheclinicalsetting.Thistechniquecanpreciselycharacterizethemechanicsofmyocardialcontractionandrelaxation.Themostcommonlyusedparameterisgloballongitudinalstrain,whichismoresensitivethanejectionfractionforthemeasurementofsystolicfunction.Thisreviewfocusesontheprognosticvalueofgloballongitudinalstraininpredictingadverseoutcomesincardiovasculardisease.
简介:Themultifractalformalismforsinglemeasureisreviewed.Next,amixedgeneralizedmultifractalformalismisintroducedwhichextendsthemultifractalformalismofasinglemeasurebasedongeneralizationsoftheHausdorffandpackingmeasurestoavectorofsimultaneouslymanymeasures.Borel-CantelliandLargedeviationsTheoremsareextendedtohigherordersandthusappliedforthevalidityofthenewvariantofthemultifractalformalismforsomespecialcasesofmulti-doublingtypemeasures.
简介:Thispaperstudiesthecontrollabilityandobservabilitymeasuresofstructuralvi?brationandacousticradiationandproposesameasureofmodalobservabilitybasedonacousticpressureoutputsandmeasuresofcontrollabilityandobservabilityofacousticradiationbycombiningthemeasuresofmodalcontrollabilityandobservabilityofvibrationmodeswithcorrespondingmodalacousticradiationefficiencies.Aplatewithcontrolforceinputsandvibrationalresponseoutputsandacousticpressureoutputsisinvolvedtoshowthemodalcontrollabilityandobservabilitymeasuresofvibrationmodesandmeasuresofcontrollabilityandobservabil?ityofstructuralvibrationandacousticradiation.Observabilitymeasuresbasedonvibrationalresponseoutputsandacousticpressureoutputsarecomparedandtheemphasisisonthemea?suresbasedontheacousticpressureoutputs.Finallytheapplicationandusefulnessofthecontrollabilityandobservabilitymeasurestoactivecontrolofstructuralvibrationandacous?ticradiationareillustratedandcompared.Itshowsthatthecontrollabilityandobservabilitymeasuresprovideusefulguidanceforactivecontroldesignespeciallyinoptimalactuatorandsensorplacement.
简介:Objective:Thepaperdiscussesrecentevidenceontheassessmentoflanguageoutcomesinchildrenwithhearinglossacquiringorallanguage.Methods:Researchemphasizesthatlanguagetestsmustbespecificenoughtocapturesubtledeficitsinvocabularyandgrammarlearningatdifferentdevelopmentalages.TheDiagnosticReceptiveandExpressiveAssessmentofMandarin(DREAM)wascarefullydesignedtobeacomprehensivestandardizedMandarinassessmentnormedinMainlandChina.Objective:Thepaperdiscussesrecentevidenceontheassessmentoflanguageoutcomesinchildrenwithhearinglossacquiringorallanguage.Methods:Researchemphasizesthatlanguagetestsmustbespecificenoughtocapturesubtledeficitsinvocabularyandgrammarlearningatdifferentdevelopmentalages.TheDiagnosticReceptiveandExpressiveAssessmentofMandarin(DREAM)wascarefullydesignedtobeacomprehensivestandardizedMandarinassessmentnormedinMainlandChina.Results:Thispapersummarizestheevidence-baseditemdesignprocessandvalidityandreliabilityresultsofDREAM.ApilotstudyreportedhereshowsthatDREAMprovideddetailedinformationabouthearingimpairedchildren’slanguageabilitiesandcanbeusedtoaidinterventionplanningtomaximizeprogress.Conclusion:DREAMrepresentsanexampleoftranslationalscience,transferringmethodsfromempiricalstudiesoflanguageacquisitioninresearchenvironmentsintoapplieddomainssuchasassessmentandintervention.ResearchonoutcomesinChinawilladvancesignificantlywiththeavailabilityofevidence-basedcomprehensivelanguageteststhatmeasureasufficientagerangeofskills,arenormedonMandarinspeakingchildreninmainlandChina,andaredesignedtocapturefeaturescentraltoMandarinlanguageacquisition.