简介:<正>AssociatedwitheachfinitedirectedquiverQisaquasi-hereditaryalgebra.theso-calledtwisteddoubleofthepathalgebrakQ.Characteristictiltingmodulesoverthisclassofquasi-hereditaryalgebrasareconstructed.Theirendonorphismalgebrasareexplicitlydescribed.Itturnsoutthatthisclassofquasi-hereditaryalgebrasisclosedundertakingtheRingeldual.
简介:HL-2AisthefirsttokamakwithdivertorinChina.TheobjectivesofHL-2Aaretoproducemoreadaptabledivertorconfigurationstostudyenergyexhaustandimpuritycontrol,andtostudyenhancedcoreplasmaconfinementbyprofilecontrolandmoderateplasmashaping.HL-2Ahaswelloptimizedoperationalflexibilityandexcellentaccessi-bilityforthediagnosticsystemstofacilitatevariousplasmaexperiments.
简介:WeestablishtheconstructiontheoryoffunctionbaseduponalocalfieldKpasunderlyingspace.Byvirtureoftheconceptofpseudo-differentialoperator,weintroduce"fractalcalculus"(or,p-typecalculus,or,Gibbs-Butzercalculus).Then,showtheJacksondirectapproximationtheorems,BermsteininverseapproximationtheoremsandtheequivalentapproximationtheoremsforcompactgroupD(Kp)andlocallycompactgroupK+p(=Kp),sothatthefoundationofconstructiontheoryoffunctiononlocalfieldsisestablished.Moreover,theJacksontype,Bernsteintype,andequivalentapproximationtheoremsontheH?lder-typespaceCσ(Kp),σ>0,areproved;thentheequivalentapproximationtheoremonSobolev-typespaceWrσ(Kp),σ≥0,1≤r<+∞,isshown.
简介:ThispapergivesamethodtoconstructindecomposablepositivedefiniteintegralHermitianformsoveranimaginaryqusadraticfieldQ(√-m)withgivendiscriminantandgivenrank.Itisshownthatforanynaturalnumbersnanda,therearen-aryindecompossblepositivedefiniteintegralHermitianlatticesoverQ(√-1)(resp.Q(√-2)withdiscriminanta1exceptforfour(resp.one)exceptions.Intheseexceptionalcasestherearenolatticeswiththedesiredproperties.
简介:Inthispaper,weconstructaclassofnowheredifferentiablecontinuousfunctionsbymeansoftheCantorseriesexpressionofrealnumbers.Theconstructedfunctionsincludesomeknownnondifferentiablefunctions,suchasBushtypefunctions.Thesefunctionsarefractalfunctionssincetheirgraphsareingeneralfractalsets.Undercertainconditions,weinvestigatethefractaldimensionsofthegraphsofthesefunctions,computetheprecisevaluesofBoxandPackingdimensions,andevaluatetheHausdorffdimension.Meanwhile,theHoldercontinuityofsuchfunctionsisalsodiscussed.
简介:可变的步尺寸的新多项式明确的表达线性multistep方法被介绍,在每个k步方法被k的一个固定集合描绘的地方-1或k参数。这构造包括最大的顺序的所有方法(p=k为生硬,并且p=k+1为nonstiff问题)。由建设支持时间步adaptivity,新明确的表达不基于扩大古典固定的步尺寸方法;相反古典的方法是在一个统一框架以内修理了步尺寸限制被获得。方法在Matlab被实现,与本地错误评价和大量步尺寸控制器。这为处于现实主义的运作的条件调查并且比较不同multistep方法提供一个平台。计算实验证明新multistep方法构造和实现有利地比作存在软件,尽管可变顺序还没被包括了。