简介:Itisoftenstatedthatevencleantokamakdischargesdisruptathighdensity.Onepossibilityisthatsuchdisruptionresultfromtheenergylossarisingfromhydrogenrecyclingattheedgeoftheplasma.thisenergylosscouldleadtoacontractionofthecurrentchannelandtheproductionofadisruptivelyunstableconfiguration.
简介:Thediffusionbehaviorofpolystyrenewithnarrowmolecularweightdistributionat20℃in1,4-dioxanewasinvestigatedbythephotoncorrelationspectroscopy.Thecumulantmethodwasemployedfortheanalysisoftheintensity-intensityautocorrelationfunctionmeasuredoverawiderangeofthescatteringvector.ThediffusioncoefficientDwasdeterminedasthefunctionofconcentrationCinthemolecularweightrangeof3.0×104-1.20×106.Inalowconcentrationrange,DwasfoundtobelinearlydependentonC,whichhasbeenfoundforsomeothersystems.ThedependenceofDonmolecularweightatinfinitedilutioncanbewrittenasanempiricalformulaD0=kDM-γM,theexponentγ(0.576±0.01)isingoodagreementwiththeresultofthescalingtheory.
简介:Letf(x)∈C[-1,1],pn*(x)bethebestapproximationpolynomialofdegreentof(x).G.Iorentzconjecturedthatifforalln,p2n*(x)=p2n+1*(x),thenfiseven;andifp2n+1*(x)=p2n+2*(x),po*(z)=0,thenfisodd.Inthispaper,itisprovedthat,undertheL1-norm,theLorentzconjectureisvalidconditionally,i.e.if(i)(1-x2)f(x)canbeextendedtoanabsolutelyconvergentTehebyshevsories;(ii)foreveryn,f(x)-p2n+1*(x)hasexactly2n+2zeros(or,inthearcondsituation,f(x)-p2n+2*(x)hasexaetly2n+3zeros),thenLorentzconjectureisvalid.
简介:A.simplicialmesh(triangulation)isconstructedthatgeneralizesthetwo-dimensional4-directionmeshtoR~m.Thismesh,withsymmetric,shift-invariantvaluesatthevertices,isshowntoadmitaboundedC~1interpolantifandonlyifthealternatingsumofthevaluesattheverticesofany1-cubeiszero.Thisim-pliesthaiinterpolationattheverticesofanm-dimensional,simplicialmeshbyaC~1piecewisepolynomialofdegreem+1withonepiecepersimplexisunstable.
简介:AdetailedstudyofthepressureoscillationinducedbythefilmboilingofHeⅡispresented.Thefilmboilingstateandthestabilitynofthevapourfilmaredeterminedbythegoverningparameter(i.e.theimmersiondepth).Itisfoundthatthepowerdensityspectrumofthepressureoscillationinducedbythefilmboilingdisplaysthe1/f^α-behaviour.Theexponentαwasfoundtobewithintherangefromonetotwo,whichindicatestheexistenceofself-organizedcriticalityinthefilmboilingofHeⅡ.
简介:Promotedbystannoussalts,1,1,1-trichloro-2,2,2-trifluoroethanereactsreadilywithaliphatic,aromatic,andα,β-unsaturatedaldehydesgivingthecorrespondingalcoholsbearingaCF3CCl2-moietyingoodtoexcellentyields.ThesealcoholsarefartheroxidizedbyJonesreagentgivingthecorrespondingketonesinhighyields.
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.
简介:DesignandConstructionofRIBLL1ExperimentalSetupatHIRFL¥GuoZhongyan;ZhanWenlong;ZhouJianqun;ZhaoYouxiong;WangJinchuan;L...
简介:1-17 Vibrational Properties of Na_n1-17VibrationalPropertiesofNa_n¥ZhangFengsllou;E.SuraudlandR.GlowinskiZItisknownthatsmallso...
简介:性质awc1被许多作者使用由弱Chebyshevsubspaces的元素有关近似获得结果。在这份报纸,作者在细节学习这个性质,由收集有关它并且由发现新的散布结果。
简介:K1,k┐FACTORIZATIONOFBIPARTITEGRAPHSDUBEILIANGAbstract.Inthispaper,anecessaryconditionforabipartitegraphλKm,ntobeK1,k-factoriz...
简介:Anecessaryandsufficientconditionofregularityof(0,1,…,m-2,m)interpo-lationonthezerosoftheLaguerrepolynomialsLn(α)(x)(α≥-1)inamanageableformisestablished.Meanwhile,theexplicitrepresentationofthefundamentalpolynomials,whentheyexist,isgiven.Moreover,itisshownthat,iftheproblemof(0,1,…,m-2,TO)interpolationhasaninfinityofsolutions,thenthegeneralformofthesolutionsisf0(x)+Cf1(x)withanarbitraryconstantC.
简介:Usingtheextensionhomogeneousbalancemethod,wehaveobtainedsomenewspecialtypesofsolitonsolutionsofthe(2+1)-dimensionalKdVequation.Startingfromthehomogeneousbalancemethod,onecanobtainanonlineartransformationtosimple(2+1)-dimensionalKdVequationintoalinearpartialdifferentialequationandtwobilinearpartialdifferentialequations.Usually,onecanobtainonlyakindofsoliton-likesolutions.Inthisletter,wefindfurthersomespecialtypesofthemultisolitonsolutionsfromthelinearandbilinearpartialdifferentialequations.``