简介：ＡＮＥＦＦＥＣＴＩＶＥＩＭＰＲＯＶＥＭＥＮＴＯＦＲＥＭＥＳＡＬＧＯＲＩＴＨＭＸｉｏｎｇｇｕｉｊｉｎｇ；（熊规景）Ｘｉｅｓｉｑｉｎｇ（谢四清）（Ｉｎｓｔ．ｏｆＭａｔｈ．Ｓｃｉ．，ＣｈｉｎｅｓｅＡｃａｄｅｍｙｏｆＳｃｉｅｎｃｅｓ，４３００７１Ｗｕｈａｎ，...

简介：Thediscretizationsizeislimitedbythesamplingtheorem,andthelimitisonehalfofthewavelengthofthehighestfrequencyoftheproblem.However,onehalfofthewavelengthisanidealvalue.Ingeneral,thediscretizationsizethatcanensuretheaccuracyofthesimulationismuchsmallerthanthisvalueinthetraditionalfiniteelementmethod.Thepossiblereasonofthisphenomenonisanalyzedinthispaper,andanefficientmethodisgiventoimprovethesimulationaccuracy.

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简介：ＩｍｐｒｏｖｅｍｅｎｔｏｆＰｈａｓｅＭｅａｓｕｒｅｍｅｎｔＳｙｓｔｅｍｆｏｒＨＩＲＦＬ￥ＺｈａｎｇＪｉａｎｈｕａ；ＬｉＪｉａｎｄＨｕａｎｇＺｈｅｎｇｒｏｎｇＰｈａｓｅｍｅａｓｕｒｅｍｅｎｔｉｓｖｅｒｙｉｍｐｏｒｔａｎｔｆｏｒａｃｃｅｌｅｒａｔｏｒｏｐ...

简介：Inordertoidentifyheavierelements,wehavedevelopedanewlongitudinalfieldgasionizationchamber(IC)withanangleof30°ofplate(asshowninFig.1).TheICisoperatedinflowingiso-butanegasatapressureof10kPa.Aftertestingbyusinga3-componentαparticlesourceandcomparingwiththeoldlongitudinalfield

简介：OneofthemostchallengingissuesfacedinHEPinrecentyearsisthequestionofhowtocapitaliseonsoftwaredevelopmentandmaintenanceexperienceinacontinuousmanner.Tocapitaliseinourcontextmeanstoevaluateandapplynewtechnologiesastheyarise,andtofurtherevolvetechnologiesarlreadywidelyinuse,Italsoimpliesthedefinitionandadoptionofstandards,whileensuringreproducibilityandqualityofresults.TheCMSprocessimprovementeffortistwo-pronged.ItaimsatcontinuousimprovementofthewayswedoObjectOrientedsoftware,aswellascontinuousimprovementintheefficiencyoftheworkingenviuronment.Inparticulartheuseandcreationofde-factosoftwareprocessstandardswithinCMShasproventobekeytooursuccessfulsoftwareprocessimprovementprogram.WedescribethesuccessfulCMSimplementationofasoftwareprocessimprovementstrategy,followingISO15504sincethreeyears.WegivethecurrentstatusofthemostimportantprocessesfamiliesformallyestablishedinCMS,andprovidetheguidelineswefollowedbothfortooldevelopment,andmethodologyestablishment.

简介：ThispaperestablishesanimprovementontheQLalgorithmforasymmetrictridiagonalmatrixTsothatwecanworkouttheeigenvaluesofTfaster.Meanwhile,thenewalgorithmdon’tworsenthestabilityandprecisionoftheformeralgorithm.

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简介：Therearetwokindsofchargingmodeoftheohmpowersupply.Whenthedeviceworksnormallyandtheplasmabreakdownvoltageislow,theohmpowersupplywillruninthelogicalnon-loopcurrentmodewhichcurrentissymmetrical,butwhenthedischargingconditionisnotverywellandtheplasmabreakdownvoltageishigh,theunsymmetricalmodewillbeadopt,i.e.switchingoffthepositiverectifier,

简介：ForsatateformlineargramasFangandsaodeinedandapproachwhichwouldfindanoptimalsolutionbysolvingananconstrainedconvexdualprogramming.ThedualwasconstruciedbyapplyinganemropicpeturbationandasimpleInequalityInz0n,Inthispaper,wesuggestthanapaperbationfunctiontaketheplaceofInxsuchthatthenewapprodthasgoodnumericalstabilityandhasallpropertiesoftheoriginalmethod

简介：Therearemanyinneritemsinvacuumvessel,andhundredsofsealsonthevesselbortsintheHL-2Atokamak,soitisdifficulttogetexcellentvacuum.Duringtheengineeringtestin2002,theresultsofquadrupolemassspectrometershowedthatthepartialpressuresofoxygenandH2Owerehigherthannormalvalue,someleaksontheupperMP3coiljacketsandportsealshadbeendetected.Inordertocarryoutgooddischargeexperiment,thegoodvacuumandwallconditionmustbemaintained.

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简介：Inthispaper,animprovementofheatingmethodformeasuringwetnessoftheflowingwetsteamisdeveloped,thebasicprincipleoftheheatingmethodispresentedandthemathematicalmodelhasbeenbuiltforanalyzingthethermodynamicsproblemsduringtheprocessofheating,Moreover,aninstrumentformeasuringwetnessofwetsteamflowwasdesignedandmadeout.ThisinstumenthasbeenusedformeasuringwetnessofthewetsteamflowattheoutletofthenozzleriginThermalTurbineLaboratory,Xi'anJiaotongUniversity,Byanalyzingtherelativeerroroftheresult,itwasfoundthatthisinstrumenthasfairlyhighaccuracy,itcanbeusedastheprototypeofpracticalinstrumentandhasanimportantapplicablevalueinengineering.

简介：Onthebasisoftheexistingfundamentalsolutionsofdisplacements,furtherimprovementismade,andthenthegeneralfundamentalsolutionsofbothplaneelasticandplaneplasticproblemsforortho-tropicmaterialsareobtained.Twoparametersbasedonmaterialconstantsα1,α2areusedtoderivetherele-vantexpressionsinarealvariableform.Additionally,ananalyticalmethodofsolvingthesingularintegralfortheinternalstressesisintroduced,andthecorrespondingresultsaregiven.Ifα1=α1=1,alltheexpres-sionsobtainedfororthotropycanbereducedtothecorrespondingonesforisotmpy.Becausealltheseexpres-sionsandresultscanbedirectlyusedforbothisotropicproblemsandorthotmpicproblems,itisconvenienttousetheminengineeringwiththeboundaryelementmethod（BEM）.

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简介：Therearethreemainproblemsintheweaklynonlineartheoryofhydrodynamicstability:(1)Thera-diusofconvergencewithrespecttotheperturbationparameteristoosmallandthereisnoconcreteestimationforit.(2)Thesolutionhasaspecialstructure,thusingeneral,itcannotsatisfytheinitialconditionposedbymanypracticalproblems.(3)Whenthelinearpartofitssolutiondoesnotcorrespondtoaneutralcase.therearemorethanonewayindeterminingtheLandauconstants,andpracticallynooneknowswhichisthebestway.Inthispaper,problems(1)and(2)aresolvedtheoretically,andwaysforitsimprovementhavebeenproposed.Bycomparingthetheoreticalresultswiththoseobtainedbynumericalsimulations,problem(3)hasalsobeenclari-fied.

简介：Wereportourlatticesimulationonthecharmoniumspectrainthequenchedapproximation.Becausethecompleteadjustmentonallthenonperturbativeparametersneedsmuchcalculationtime,weonlyadjusttwoofthem,butwithsomerescalingformasssplitting.Aftertherescaling,thecalculatedmassesofmesonare3.030GeV(ηc),3.080GeV(J/ψ),3.546GeV(he)and3.412GeV(Xco)respectively,whichisinagreementwiththeexperimentalresults.

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简介：ＳｔａｔｕｓＡｎａｌｙｓｉｓａｎｄＩｍｐｒｏｖｅｍｅｎｔＰｒｏｐｏｓａｌｏｆＣｏｎｔｒｏｌＳｙｓｔｅｍｆｏｒＳｉｎｕｓｏｉｄａｌＰｏｗｅｒＳｕｐｐｌｉｅｓ￥ＣｈｅｎＭｉｎｇｌａｎｇＴｈｅｓｉｎｕｓｏｉｄａｌｐｏｗｅｒｓｕｐｐｌｉｅｓｉｎＳＦＣａｒｅｖ...