简介：在医药Doppler超声系统，是的一个高通行证的过滤器通常采用了过滤墙喧嚷部件，将移开未经触动的Doppler超声血表明的低速度血flow.To摘录的信息，一条新奇途径基于空间地选择的噪音过滤被建议。墙信号被空间地选择的噪音过滤第一从小浪估计空间关联性质。然后，墙喧嚷被降噪消除剩余血流动信号的技术的小浪阀值确切获得。最后，未经触动的血流动信号被从混合信号减去墙信号完成。这条途径被用于模仿的计算机并且在vivo颈动脉Doppler超声信号。实验结果证明基于的小浪空间来临能确切提取血流动信号，并且比高通行证的过滤的在吝啬的绝对错误完成大约45%更低的结果。这条途径被期望是一个有效方法在Doppler超声系统移开墙喧嚷。

简介：ThepaperdefinesanextendedCesàrooperatorTgwithholomorphicsymbolgintheunitballBofCnasWhereg(z)=∑j=1∑nzjg/zjistheradialderivativeofg.Inthispaper,theauthorcharacterizesgforwhichTgisbounded(orcompact)ontheBlochspaceBandthelittleBlochspaceB0.

简介：InthisnoteweconsiderWente’stypeinequalityontheLorentz-Sobolevspace.If▽f∈Lp1,q1（Rn）,G∈Lp2,q2（Rn）anddivG≡0inthesenseofdistributionwhere（1/p1）+（1/P2）=（1/q1）+（1/q2）=1,1

简介：Inthispaper,weprovethatthebestrationalapproximationofagivenanalyticfunctioninOrliczspaceL~*(G),whereG={|z|≤∈},convergestothePadeapproximantsofthefunctionasthemeasureofGapproacheszero.

简介：Apiezoelectricaccelerometerwithopticalfibertomeasurethedynamicparameterof3dimensionsispresented.TheoperationequationsonX,YandZaxesaredivided,andthetestresultsof3dimensionalsensitivitiesandfrequencyresponse,aregivenaswellasexperimentresultsofvibrationtestwiththissetup.

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简介：Spacesymmetryofprehnite,whichoccursincavitiesandveinswithinSkarnfromtheTieshanironmineraldeposit,Daye,Hubeiprovince,CentralChina,hasbeendeterminedusingselectedareaelectrondiffraction(SAED)andconvergent-beamelectrondiffraction(CBED)onthesubmicrometerscale.OurresultsconfirmthatthenaturalprehnitemayhavethestructurewithsymmetryPncm.Theunit-cellparametersofinvestigatedprehnite(a=0.458nm,b=0.555nm,andc=1.853nm)havebeencalculatedbyusingthemulticrystaldifiractionringsofgold,theinternalstandard.

简介：WhenthepoetHesiodcomposedWorksandDayslateintheeighthcenturyBC,heincorporatedthecuriousadvicethatwhilejourneyingfromoneplacetoanotheragoodmanshouldalwaysrefrainfromrelievinghimselfonorbesidetheroad,instreamsorwhilefacingthesun(lines727-32,757-59),Ofcourse,Hesiodwasdoingmoreherethansimplymakinganobservationaboutmodestyorpersonalhygiene.Hewascommentinguponanotherlessphysicalbututterlyvital

简介：Amethodthatattemptstorecoversignalusinggeneralizedinversetheoryispresentedtoobtainagoodapproximationofthesignalinreconstructionspacefromitsgeneralizedsamples.Theproposedapproachesdifferwiththeassumptionsonreconstructionspace.Ifthereconstructionspacesatisfiesone-to-onerelationshipbetweenthesamplesandthereconstructionmodel,thenweproposeamethod,whichachievesconsistentsignalreconstruction.Atthesametime,whenthenumberofsamplesismorethanthenumberofreconstructionfunctions,theminimal-normreconstructionsignalcanbeobtained.Finally,itisdemonstratedthattheminimal-normreconstructioncanoutperformconsistentsignalreconstructioninboththeoryandsimulationsfortheproblem.

简介：Reactioncontrolsystem(RCS)isapowerfulandefficientactuatorforspacevehiclesattitudecontrol,whichistypicallycharacterizedasapulsedunilateraleffectoronlywithtwostates(off/on).Alongwithinevitableinternaluncertaintiesandexternaldisturbancesinpractice,thisinherentnonlinearcharacteralwayshindersspacevehiclesautopilotfrompursuingprecisetrackingperformance.Comparedtomostofpre-existingmethodologiesthatpassivelysuppresstheuncertaintiesanddisturbances,adesignbasedonpredictivefunctionalcontrol(PFC)andgeneralizedextendedstateobserver(GESO)isfirstlyproposedforthree-axisRCScontrolsystemtoactivelyrejectthatwithnorequirementforadditionalfuelconsumption.ToobtainahighfidelitypredictivemodelonwhichtheperformanceofPFCgreatlydepends,thenonlinearcouplingmultiple-inputmultiple-output(MIMO)flightdynamicsmodelisparameterizedasastate-dependentcoefficientform.Andbasedonthat,aMIMOPFCalgorithminstatespacedomainforaplantofarbitraryordersisdeducedinthispaper.Theinternaluncertaintiesandexternaldisturbancesarelumpedasatotaldisturbance,whichisestimatedandcancelledtimelytofurtherenhancetherobustness.Thecontinuouscontrolcommandsynthesisedbyabovecontroller-rejectortandemisfinallymodulatedbypulsewidthpulsefrequencymodulator(PWPF)toon-offsignalstomeetRCSrequirement.Therobustnessandfeasibilityoftheproposeddesignarevalidatedbyaseriesofperformancecomparisonsimulationswithsomeprominentmethodsinthepresenceofsignificantperturbationsanddisturbances,aswellasmeasurementnoise.

简介：Themulti-parameterinversescatteringproblemofelasticwaveequationwithsinglefre-quencyisinvestigatedwithinBornapproximation.Byuseofawidebandmeasuringschemeinwhichbothtransmittersandreceiversscanoverthehalf-spacesurface,theformulaofthescatteringfieldofelasticwaveisderived.Fourtypesofmodeconversionofelasticwave(P→P,P→S,S→P,S→S)areseparatedfromthescatteringfield.Thesecomponentscontainsufficientinformationforustorecon-structtheconfigurationsofthedensityandLaméparametersofthemedium.Theinverseformulashavetheformoffilteredback-propagationasintheacousticdiffractiontomography.Computersimu-lationsarealsoobtained.

简介：Inthispaper,theproblemofcomputingthefreedistanceofTrellisCodedModulation(TCM)signalsequencehasbeendiscussed;anewalgorithm-thematrixalgorithmisproposed;andthestep-numberestimationproblemforstatetransmissiontocomputethefreedistanceofTCMsignalsequencehasbeentheoreticallysolved.ThematrixalgorithmisderivedfromtheViterbialgorithm,andisanimplementationofViterbialgorithmintheformofmatrix.Comparedwithotheralgorithms,thematrixalgorithmgainstwoadvantages:(1)Theexplicitsolution,anditsrelativelylesscomplexity.(2)Morereflexibleabilitytothesignalspacedistancevariation.Asexamples,theresultsofsomeTCMsignalsequenceonAWGNchannelandfadingchannelshavebeenpresented.

简介：Boilingheattransferprocessisanalyzedinamoderatenarrowspaceconsistedoftwohorizontalplates,Themaindifferencebetweenthisprocessandtheconventionalunconfinedpoolboilingistheliquidsupplymechanismwhichisabsolutelypreventedbythegrowthofcoalescencebubblealongwiththeheatedsurfaceinthenarrowspace.Asaresult,themacrolayerbecomesthinnerduetotheevaporationoftheindividualbubbleswithinthemacrolayerduringtheperiodofbubblecoalescence,withorwithoutdryoutthatdependsonboththegapsizeofnarrowspaceandthesizeofheatedsurface.Foraspecifiedsizeoftheheatedsurface,theinitialthicknessoftheliquidlayerhasacriticalvaluewhichapproachesaconstantwhilethespaceheightislargerthanacriticalvalue.Theindividualbubblebehaviorsandtheheattransfercanbeconsideredasthesameasthatintheunconfinedpoolboiling,ifthespacegapislarge,However,theindividualbubblesdonotgenerateinthelastperiodofthebubblecoalescenceandalowermaximumheatfluxwillberesultedifthespacegapisreduced.Insuchacase,themacrolayerisdryout.

简介：Animprovedgeneticalgorithmforsearchingoptimalparametersinn-dimensionalspaceispresented,whichencodesmovementdirectionanddistanceandsearchesfromcoarsetoprecise.Thealgorithmcanrealizeglobaloptimizationandimprovethesearchefficiency,andcanbeappliedeffectivelyinindustrialoptimization,dataminingandpatternrecognition.

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简介：China'scirculareconomyisstillattheinitialstage,whosedevelopmenthasmanydifficultiesandproblemsrequiringimmediateresolutiontheoreticallyandpractically.Duetothedifferencesofregionsonthescaleofland,endowmentofresources,economicbasisandculturalbackground,thedevelopmentallevelsandcapabilitiesofcirculareconomyareinevitablydifferent.Basedonestablishingtheindicatorsystemforassessingthedevelopmentallevelofregionalcirculareconomy,spatialvariationofChina'scirculareconomyismeasuredbythequantitativemeasurementusingprincipalcomponentanalysis,andtheexistingproblemsarealsoanalyzedanddiscussed.Ononehand,thedifferencesofthedevelopmentcapabilityofthecirculareconomyofdifferentprovinces(cities)areprofoundinChina;①Differencebetweenthefirstcategory(strong)andthesecondcategory(relativelystrong)is1.1264points.Differencebetweenthesecondcategoryandthethirdcategory(relativelyweak)is0.3867points.Differencebetweenthethirdcategoryandthefourthcategory(weak)is1.0238points.Differencebetweenthefirstcategoryandthefourthcategoryreachesupto2.0869points.Averagedifferencebetweentheareawherethedevelopmentallevelofcirculareconomyisrelativelystrongandtheareawherethedevelopmentallevelofcirculareconomyisrelativelyweakis1.3617points.②Thedifferencesofthedistributionoftheareas,withdifferentdevelopmentcapabilityofcirculareconomy,whicharelocatedinthethreeeconomicregionsofChina,arealsoprofound.Theregionswitharelativelystrongdevelopmentcapabilityofcirculareconomyaremainlylocatedintheeasterneconomicarea,whichaccountfor22.58%ofthewholeregions,whileonlyaccountfor12.90%inthemiddleandwesterneconomicareas.Onthecontrary,theregionswitharelativelyweakdevelopmentcapabilityofcirculareconomyaccountfor48.39%inthemiddleandwesternarea,whileaccountfor16.13%intheeasternarea.Ontheothe

简介：InthispaperwestudyBacklundtransformationsoftime-likelinearWeingartensurfaceswithnegativediscriminantinLorentzianspaceforms.

简介：摘要：如今，消费者对质量的重视程度已经进入到一个严格而挑剔的阶段，人们更加青睐高质量、高品质的产品，因此，企业重视质量成本管理是顺应时代之举，是实现企业转型的必要选择。文章选取中国知网（CNKI）数据库1978—2022年与“质量成本管理”相关的1700多篇文献为样本，利用Cite Space软件绘制知识图谱，对质量成本管理的研究现状及趋势进行分析，并针对现有研究存在的问题提出建议，推动质量成本管理的相关研究对企业变革产生更大的驱动力。