简介：订的对(e，f)如果ef不是幂等，而fe是幂等，常规semigroup的幂等被称为斜对。我们以前证明了有幂等的斜对的四种不同类型。这里，我们在完整的转变semigroups调查如此的斜对的普遍存在。关键词完整的转变semigroups-幂等-斜对先生(2000)题目分类20M20

简介：Jointlocationandscalemodelsoftheskew-normaldistributionprovideusefulextensionforjointmeanandvariancemodelsofthenormaldistributionwhenthedatasetunderconsiderationinvolvesasymmetricoutcomes.Thispaperfocusesonthemaximumlikelihoodestimationofjointlocationandscalemodelsoftheskew-normaldistribution.Theproposedprocedurecansimultaneouslyestimateparametersinthelocationmodelandthescalemodel.Simulationstudiesandarealexampleareusedtoillustratetheproposedmethodologies.

简介：ＮＵＭＥＲＩＣＡＬ　ＣＯＭＰＵＴＡＴＩＯＮ　ＯＦ　ＴＨＥ　ＤＩＦＦＵＳＩＯＮ　ＯＦ　ＴＨＥ　ＣＯＮＴＡＭＩＮＡＮＴＳ　ＡＮＤ　ＴＨＥ　ＦＬＯＷ　ＦＩＥＬＤ　ＯＦ　ＳＫＥＷ　ＤＩＳＣＨＡＲＧＥＳ　ＩＮＴＯ　Ａ　ＣＨＡＮＮＥＬＮＵＭＥＲＩＣＡＬＣＯＭＰＵ...

简介：Inthispaper,weshowthatforaneventuallystronglymonotoneskew-productsemiflowτ,thestrictorderingonEc(thesetconsistingofcontinuousequilibriaofτ)impliesthestrongone.

简介：LetKn×nbethesetofalln×nmatricesandKrn×ntheset{A∈Kn×n|rankA=r}onaskewfieldK.Zhuang[1]denotesbyA#thegroupinverseofA∈Kn×nwhichisthesolu-tionoftheeuqations:AXA=A,XAX=X,AX=AX.

简介：我们在场切开的Hermitian和skew-Hermitian(HSS)为与non-Hermitian和积极definite/semi-definite矩阵解决大稀少的连续Sylvester方程的重复方法。HSS重复方法的无条件的集中被证明，集中率上的上面的界限被导出。而且到计算花费了的还原剂，我们建立HSS重复方法的不精确的变体并且详细分析它的集中性质。数字结果证明HSS重复方法和它的不精确的变体是为连续Sylvester方程的这个类的有效、柔韧的解答者。[从作者抽象]

简介：Basedonrigid-plasticfiniteelementmethod,askewrollingprocessofsteppedpartissimulated.Consideringnodesavingandeffectiveremeshing,thetetrahedronsolidelementsareusedtodiscreteworkpiece.Theworkpiecematerialadoptsrigid-plasticmodel,wheretheflowstressisfunctionofeffectivestrain,effectivestrainrateandtemperature.Thethermomechanicalcouplingisconsideredinthesimulation.Tomodelthespinningworkpieceundergoingplasticdeformation,anovelsolutionispresentedandappliedinthispaper.Thestressstateintheworkpieceandformingcharacteristicofskewrollingareanalyzed.Theformingload,includingrollertorqueandforcesinthreedirectionsarepredicted.Theaboveanalysesarehelpfultounderstandingofformingmechanismsandimprovingofprocessanddiedesign.