简介：Objectives:Auditoryneuropathy(AN)isasensorineuralhearingdisordercharacterizedbyabsentorabnormalauditorybrainstemresponses(ABRs)andnormalcochlearouterhaircellfunctionasmeasuredbyotoacousticemissions(OAEs).Manyriskfactorsarethoughttobeinvolvedinitsetiologyandpathophysiology.ThreeChinesepedigreeswithfamilialANarepresentedhereintodemonstrateinvolvementofgeneticfactorsinANetiology.Methods:Probandsoftheabove-mentionedpedigrees,whohadbeendiagnosedwithAN,wereevaluatedandfollowedupintheDepartmentofOtolaryngologyHeadandNeckSurgery,ChinaPLAGeneralHospital.Theirfamilymemberswerestudiedandthepedigreediagramswereestablished.Historyofillness,physicalexamination,puretoneaudiometry,acousticreflex,ABRsandtransientevokedanddistortion-productotoacousticemissions(TEOAEsandDPOAEs)wereobtainedfrommembersofthesefamilies.DPOAEchangesundertheinfluenceofcontralateralsoundstimuliwereobservedbypresentingasetofcontinuouswhitenoisetothenon-recordingeartoexamthefunctionofauditoryefferentsystem.Somesubjectsreceivedvestibularcalorictest,computedtomography(CT)scanofthetemporalboneandelectrocardiography(ECG)toexcludeotherpossibleneuropathydisorders.Results:Inmostaffectedsubjects,hearinglossofvariousdegreesandspeechdiscriminationdifficultiesstartedat10to16yearsofage.TheiraudiologicalevaluationshowedabsenceofacousticreflexandABRs.AsexpectedinAN,thesesubjectsexhibitednearnormalcochlearouterhaircellfunctionasshowninTEOAE&DPOAErecordings.Pure-toneaudiometryrevealedhearinglossrangingfrommildtosevereinthesepatients.Autosomalrecessiveinheritancepatternswereobservedinthethreefamilies.InPedigreeⅠandⅡ,twoaffectedbrotherswerefoundrespectively,whileinpedigreeⅢ,2sisterswereaffected.Allthepatientswereotherwisenormalwithoutevidenceofperipheralneuropathyatthetimeofth

简介：Inthispaper,weintroduceandstudyanewclassofquasivariationalinequalities.Using’essentiallytheprojectiontechniqueanditsvariantforms,weestablishtheequivalencebetweengeneralizednonlinearquasivariationalinequalitiesandthefixedpointproblems.Thisequivalenceisthenusedtosuggestandanalyzeanumberofnewiterativealgorithms.Thesenewresultsincludethecorrespondingknownresultsforgeneralizedquasivariationalinequalitiesasspecialcases.

简介：Inthispaper,thetheoryofQuasi-steadyisappliedtothecalculationsofturbochargersmatchingtothedieselenginesandperformanceprediction.Theengineperformancepredictionprogramswritteninlanguaechavebeenusedforcalculationsofvariousturbochargeddieselengines.Ithasbeenconfirmedbythecomparisonswithexperimentaldatathattheresultsofthecalcuationarereasonable,reliableandsatisfiedfortheengineeringapplications.

简介：Accordingtothetheoryoftestingasphericalsurfacebynormalaberrationcompensationmethod,thedesigningmethodofquasi-universalcompensatorisstudied.Onthebasisofthird-orderaberrationtheory,aftercalculatingandoptimizingwithanopticaldesignprogram,thestructureparametersofacompensatorareobtained.ThisnewcompensatorcouldbeusedinTwyman-Greeninterferometer,andinmeasurementofacertainrangeofparaboloidellipsoidandhyperboloid.Thecompensationaccuracyismorethan0.02λ.

简介：伪--牛顿方程为解决非线性的方程或非强迫的优化问题的系统在quasi-Newtonmethods起了一个中央作用。相反，平底锅建议了一个新方程，并且当时，证明它具有第二份订单第一份订单传统，在某些近似意义。在这篇论文，我们做二个方程的归纳作为特殊情况包括他们。概括方程被分析，并且新更改从它被导出。象DFP一样新更改在一套标准测试问题的计算实验超过了traditionalDFP更改。

简介：Basedonmonthlyrainfalldatafrom80stationsofChinafortheperiodofJanuary1951—February1985analysedintermsofthemaximumentropyspectrumandEEOF(extendedempiricalorthogonalfunction)techniques,thespatialandtemporalfeaturesofquasi-biennialoscillation(QBO)intherainfallareinvestigatedinadetailedmanner,withsomeresultsofinterestacquired.HighlyevidentistheQBOinrainfalloverChina,especiallythemidandlowerreachesoftheChangjiangRiver,theNEsideoftheQinghai-XizangPlateau,NorthChina,thesouthernpartofNEChina,areassouthoftheChangjiangRiverandoftheNanlingmountainregion,andmostofXinjiang.ThespatialwavedescribedbythefirstandsecondeigenvectorsofEEOFforeasternChinaisatypeofwavetravellingfromNEtoSW,indicatingthecycleofpatterns(inthesouthtonorthdirection):dryness(D)-wetness(W)-dryness(D)→southernW-northernslightD→W-D-W→southernD-northernslightW→D-W-Dagain,withthefloodedregionbetweentheChangjiangandHuangheRiversfortheD-W-DoccurrenceandwiththeChangjiangRiverasthedivisionforthesouthernW-northernslightDhappening.Thethirdandfourtheigenvectorsshowastandingwave-likefeatureforthesameeasternpart,indicatingthecycleofD-W-D→transition→W-D-W→transition→D-W-D,again,wherethetransitionmeansthegeneralweakeningofdroughtandfloodingandtheirsubsequentreversaldevelopment.Theamplitudesofthetimecoefficientsofthefirsttwoeigenvectorsareoppositeinthetrendoftheirchangestothoseofthenexttwoandshowaperiodof10—14years.

简介：1.IntroductionactEbeaHa~tOPologicalspaceandmamdritemeasureonitsBorela-algebraB(E).In[11,MOSCointroducedthefollowingnow-calledMoscoconvergenceofsyllUnetricac~l~:tlf621i.t,..2.1].AsequenceofsynUnetricbilinearforms(En,D(en)),nEN,issaidtoMO8coconvergetoa...

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简介：Thispaperconsidersthequasi-stationaryStefanproblem:△u(x,t)=0inspace-timedomain,u=0andVv+δu/δv=0onthefreeboundary.underthenaturalconditionstheexistenceofclassicalsolutionlocallyintimeisprovedbymakinguseofthepropertyofFrechetderivativeoperatorandfixedpointtheorem.Forthesakeofsimplicityonlytheone-phaseproblemisdealtwith.Infacttwo-phaseproblemcanbedealtwithinasimilarwaywithmorecomplicatedcalculation.

简介：Wewilldefineandcharacterizeε-pseudoChebyshevandε-quasiChebyshevsubspacesofBanachspaces.WewillprovethataclosedsubspaceWisε-pseudoChebyshevifandonlyifWisε-quasiChebyshev.

简介：SupposethatwewanttoapproximatefC[0,1]bypolynomialsinPn,usingonlyitsvaluesonXn={i/n,0≤i≤n}.ThiscanbedonebytheLagrangeinterpolantLnfortheclassicalBernsteinpolynomialBnf.But,whenntendstoinfinity,LnfdoesnotconvergetofingeneralandtheconvergenceofBnftofisveryslow.WedefineafamilyofoperatorsBkn,n≥k,whichareintermediateonesbetweenB（0）n=B1n=BnandBnn=Ln,andwestudysomeoftheirproperties.Inparticular,weproveaVoronovskaja-typetheoremwhichassertsthatBknf-f=0(n-[（k+2）/2)forfsufficientlyregular.Moreover,B（k）nfusesonlyvaluesofBnfanditsderivatiesandcanbecomputedbyDeCasteljauorsubdivisionalgorithms.

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简介：Inthispaper,thetechniqueofquasi-losslesscompressionbasedontheimagerestorationispresented.Thetechniqueofcompressiondescribedinthepaperincludesthreesteps,namelybitcompression,correlationremovingandimagerestorationbasedonthetheoryofmodulationtransferfunction(MTF).Thequasi-losslesscompressioncomestoahighspeed.Thequalityofthereconstructionimageunderrestorationisuptoparofthequasi-losslesswithhighercompressionratio.TheexperimentsoftheTMandSPOTimagesshowthatthetechniqueisreasonableandapplicable.

简介：LetMbeanapproximatelyfinitecodimensionalquasi-invariantsubspaceoftheFockspace.Thispapergivesaformulatocalculatethecodimensionofsuchspacesandusesthisformulatostudythestructureofquasi-invariantsubspacesoftheFockspace.Especially,asoneofapplications,itisshowedthattheanalogueofBeurling'stheoremisnottruefortheFockspaceL2a(Cn)inthecaseofn≥2.

简介：Itwillbedeterminedunderwhatconditionstypesofproximinalityaretransmittedtoandfromquotientspaces.Inthefinalsection,bymanyexamplesweshowthattypesofproximinalityofsubspacesinBanachspacescannotbepreservedbyequivalentnorms.

简介：Inthispaper,aswitchingmethodforunconstrainedminimizationisproposed.ThemethodisbasedonthemodifiedBFGSmethodandthemodifiedSR1method.Theeigenvaluesandconditionnumbersofboththemodifiedupdatesareevaluatedandusedintheswitchingrule.WhentheconditionnumberofthemodifiedSR1updateissuperiortothemodifiedBFGSupdate,thestepintheproposedquasi-NewtonmethodisthemodifiedSR1step.OtherwisethestepisthemodifiedBFGSstep.Theefficiencyoftheproposedmethodistestedbynumericalexperimentsonsmall,mediumandlargescaleoptimization.Thenumericalresultsarereportedandanalyzedtoshowthesuperiorityoftheproposedmethod.

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简介：WestudyhowtousetheSR1updatetorealizeminimizationmethodsforproblemswherethestorageiscritical.Wegiveanupdateformulawhichgeneratesmatricesusinginformationfromthelastmiterations.Thenumericaltestsshowthatthemethodisefficent.

简介：1.IntroductionStefan-likeproblemswithakineticconditiononthefreeboundarytolinearparabolicequationshavebeenconsideredbyseveralauthors(see[1-4]andreferencestherein),buttoquasi-linearonesproblemssimilar,whichareconsideredhereandmoredifficultthanpreviouso...