简介：InthispaperwestudytheconvergencenfaclassofmeansonHp（G）（0

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简介：ThespectrumoftheΣ(1193)excitedstates,Σ,withisospinI=1andstrangenessS=??1isoneofthemostimportantissuesinhadronicphysics.TheΣresonancesaremostlyproducedandstudiedinK-inducedreactions.ManyΣresonancesarenowcatalogedbytheParticleDataGroup[1].However,ourknowledgeoftheseresonancesisstillverypoor.Intheenergyregionbelow2GeV,onlyafewofthemarewellestablished,suchastheΣ(1385)ofspin-parityJP=3=2+,Σ(1670)ofJp=3=2??andΣ(1775)ofJp=5=2??.Theothersarenotwellestablishedandsomeofthemareevenoflargeuncertaintiesontheirexistence.Thus,thestudyoftheΣresonancewiththeavailableexperimentaldataisnecessary.

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简介：Wepresentaseriesofachievementsassociatedtothetransferofsimulationtechnologiestothebio-medicalenvironment.WeshowalsohowthenovelcollaborativeorganizationbuiltaroundGeant4haschangedthetraditionalconceptoftechnologytransferbetweentheHEPdomainandthebio-medicalenvironment,configuringatwo-wayinteraction.

简介：Highenergyprotonbeamhasthelongpenetrationlengthinsolidmatteranditcouldproducetheradiographsandindicatethetomographyandmaterialpropertiesinsideofthespecimen.Consideringtheexpensivecoststoconstructahighenergyprotonaccelerator,theothercandidateofhighenergyelectronbeambecomesmoreacceptable[1??3].Duetothehighspatialandtemperalresolutionofhighenergyelectronbeam.Itisapowertooltodiagnosetheinnerstructurechangeduringthehighenergydensitymatterproductionandtheinertialconfinementfusionprocess.Inordertostudythedensityresolutionofthehighenergyelectronbeamradiography,astep-targetwasdesignedandproduced.ThestructureandthetargetpicturesareshowninFig.1andtheSitargetswithdifferentslot-widthwereproducedbyusingthemicroetchtechnics.

简介：Experimentalresultsontheinstabilityoftheisothermalnatural-convectionboundarylayeraroundaverticalheatedflatplatearepresented.ItisdemonstratedthatthecharacteristicsoftheinstabilitywaveintheouterlayerisconsistentwiththecalculationofBrewster&Gebhart.Afteraninitialgrowthofitslowfrequencycomponentsatthedownstreamsideoftheturningpointoftheneutralcurve(Gr≈120)itscomparativelyhigherfrequencycomponentsdevelopandbecometurbulentsubsequentlywithabuoyancysubrangeinitspowerspectra.Simultane-ously,inthemeasurementattheinnerlayernearthewallaviscousinstabilitysignalthesameastheTollmien-Schlichtingwavesinordinaryboundarylaycranditssub-harmonicsinamuchhigherfrequencydomainisdiscoveredandaninertialsubrangecanbeobservedinthespectraatGr≈378.6.

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简介：Asthebasicconditionsforlaserinertialconfinementfusion（ICF）research,thetargetsarerequiredtobewellspecifiedandelaboratelyfabricated.Becauseofthecharacteristicsofthetargets,theresearchandfabricationprocessisasystematicallytoughtask,whichneedsfundamentalanddeepinsightsintofilmdeposition,mechanicalmachining,precisemeasurementandassembly,etc.Asaresult,knowledgeofmaterialscience,physics,mechanicalaswellaselectronicsisanecessityfortargetresearchers.Inthispaper,wegiveintroductionstothestateofartontargetfabricationforICFresearchatResearchCenterofLaserFusion（RCLF）inChina.

简介：AlNthinfilmsirradiatedwith100MeVU,95MeVArand84MeVCionsfromtheHIRFL-SFC(HeavyIonResearchFacilityinLanzhou)wereinvestigatedbyInfraredspectraandRamanspectra.ItappearedA1（TO),A1（LO),E1（To）andE2PhononvibrationabsorptionmodetoirradiatedsamplesinFig.1.652cm??1isvibrationabsorptionpeakofAlN，withtheincreaseofirradiationdose,thevibrationabsorptionbandappearacertainbroadeningphenomena.Lightercarbonionirradiationonthevibrationabsorptionbandbroadeningoftheimpactisnotbig.670cm??1isthetransverseopticalphononabsorptionpeakoftheE1(TO),afterirradiation,thevibrationabsorptionpeakandthebroadenAl-Nkeyintoanorganicwhole.249and660cm??1istheE2(low)andE2(high)

简介：Inthispaperwestudytheexistenceoflimitcycleforcubicsystem（E）3,ofKolmogorovtypewithaconicalgebraictrajectoryF2（x,y）=ax2+2bxy+cy2+dx+ey+f=0Ithasbeenprovedinmyformerpapersthat（E）3doesn’thaveanylimitcycleonthewholeplaneIfb2-ac≠0,Nowweareinvestigatingthecasewhereb2-ac=0.Weprovethesufficientandnecessaryformula（2）or（13）witbwhich（E）3musthaveaparabolictrajectoryF2（x,y）=0.Thentherewillnotbeanylimitcycleonthefullplane.Onthebasisofthis,weconclude:ThecubicsystemofKolmogorovtypewithanon-degeneratedquadraticalgebraictrajectoryonthewholeplanehasnolimitcycle.

简介：讨论了L1[0,1]空间最佳单调逼近的极端点问题,给出了相应的结果.

简介：1.IntroductionInthispaperweconsiderCauchyproblemforaclassofnonhomogeneousNavier-Stokesequationsintheinfinitecylinderwith.Givensatisfyinginthedistributionsensediv,weseekasolutionvectorandapressurefunctionP(t,x)suchthatwhereisanonlinearvector-valuedfun...

简介：文章基于采矿技术原理，运用0-1整数规划的数学方法，通过考察区域煤炭行业生产建设的总投资、总产量、总效益、安全程度这四者的相互制约关系，以求在有限投资条件下尽可能满足总产量和安全程度要求而需资金最少，产出投入比最大的最优规划方案。

简介：Awatt-classbackwardwaveoscillatorisproposed,usingtheconcisesinewaveguideslow-wavestructurecombinedwithapencilelectronbeamtooperateat220GHz.Firstly,thedispersioncurveofthesinewaveguideiscalculated,then,theoscillationfrequencyandoperatingvoltageofthedevicearepredictedandthecircuittransmissionlossiscalculated.Finally,theparticle-in-cellsimulationmethodisusedtoforecastitsradiationperformance.Theresultsshowthatthisnovelbackwardwaveoscillatorcanproduceover1-Wcontinuouswavepoweroutputinafrequencyrangefrom210GHzto230GHz.Therefore,itwillbeconsideredasaverypromisinghigh-powermillimeter-wavetoterahertz-waveradiationsource.

简介：Toreducemechanicalvibrationsinducedbybigerrorscompensation,anewsoftwarecompensationmethodbasedonanimproveddigitaldifferentialanalyzer(DDA)interpolatorforstaticandquasi-staticerrorsofmachinetoolsisproposed.BasedonprincipleoftraditionalDDAinterpolator,aDDAinterpolatorisdividedintocommandgeneratorandcommandanalyzer.Therearethreetypesoferrors,consideringthedifferenceofpositionsbetweencompensationpointsandinterpolationsegments.Accordingtotheclassification,errorsaredistributedevenlyindataprocessingandcompensatedtocertaininterpolationsegmentsinmachining.On-lineimplementationresultsshowthattheproposedapproachgreatlyimprovespositioningaccuracyofcomputernumericalcontrol(CNC)machinetools.

简介：Asacontinuationof[1],theauthorstudiesthelimitcyclebifurcationaroundthefocusS1otherthanO(0,0)forthesystem(1)asδvaries.Aconjectureonthenon-existenceoflimitcyclesaroundS1,andanotheroneonthenon-coexistenceoflimitcycleswoundbothOandS1aregiven,togetherwithsomenumericalexamples.