简介：环R称为左Quasi—morphic环，是指对任意a∈R都存在6，c∈R使得Ra=f（6）并且l（a）=Rc。文章主要证明了：BMA的形式三角矩阵环T={（mb,a0）a∈A：b∈B,m∈A}是Quasi—morphic当且仅当A．B是Quasi—morphic并且M=0。这个结果引导我们研究了Quasi—morphic环的comer环的Quasi—morphic性。

简介：本文的主要目的是考虑强Morphic环D上的矩阵尾环R[D]的Morphic性质。本文讨论了类似尾环的一些性质。证明了：R[D]是强左Morphic环当且仅当R[D]是左Morphic环当且仅当D是强左Morphic环。本文还构造了一些例子来说明问题。

简介：Inthispaper,weintroduceandstudyanewclassofquasivariationalinequalities.Using’essentiallytheprojectiontechniqueanditsvariantforms,weestablishtheequivalencebetweengeneralizednonlinearquasivariationalinequalitiesandthefixedpointproblems.Thisequivalenceisthenusedtosuggestandanalyzeanumberofnewiterativealgorithms.Thesenewresultsincludethecorrespondingknownresultsforgeneralizedquasivariationalinequalitiesasspecialcases.

简介：Thespectraldensityofthequasi-homogeneous(QH)lighthasbeenknownwhenitscattersonQHmediaorpropagatesinfreespace.ThecasethatQHsourcesaresurroundedbyQHmediaisproposedinthispaper.Undertheparaxialapproximation,thespectraldensityoftheQHlightpropagatingthroughQHmediaisderived.AmodifiedscalinglawforthepropagationoftheQHlightthroughQHmediaisalsoobtained.Thislawalsoholdstrueinthefarfieldbeyondtheparaxialapproximation.

简介：这份报纸建议一些整齐条件，它在伪可能性的导致存在，强壮的一致性和最大的伪可能性的评估者(MQLE)的asymptotic规度有随机的regressors的非线性的模型(QLNM)。有随机的regressors的概括线性模型(GLM)的asymptotic结果与随机的regressors被概括到QLNM。关键词Asymptotic规度-一致性-最大的伪可能性的评估者-伪可能性的有随机的regressors的非线性的模型2000苏布杰克特先生分类62F12-62J02由中国的国家自然科学基础支持了(号码10761011，10671139，10901135)，云南省(号码2008CD081)的自然科学基础和为云南大学的中间、年轻的优秀教师的特殊基础。

简介：让G一张连接k的图，和T是V(G)的一个子集。如果G-T没被连接，那么，T被说是G的一个切割集合。G的k-cut-setT是有|T的G的一个切割集合|=k。让T是连接k的图G的k-cut-set。如果G-T能被划分成subgraphsG1和G2以便|G1|2，|G2|2，然后，我们把T称为G的重要k-cut-set。假定G是一(k-1)-connected图没有重要(k-1)-cut-set。然后，我们把G称为伪连接k的图。在这份报纸，我们为任何整数k证明那5，如果没有K4,，G是一张连接k的图，那么，G的每个顶点是有其收缩产出伪的一个边的事件连接k的图，因此有至少\(\frac{{|V(G)|}}{2}\)G的边以便他们的每个成员的收缩导致伪连接k的图。

简介：InthispaperweusethesimplexB-splinerepresentationofpolynomialsorpiecewisepolynomialsintermsoftheirpolarformstoconstructseveraldifferentialordiscretebivariatequasiinterpolantswhichhaveanoptimalapproximationorder.Thismethodprovidesanefficienttoolfordescribingmanyapproximationschemesinvolvingvaluesand(or)derivativesofagivenfunction.

简介：修改Ansari的方法，我们为quasi-Mazur空格的hypercyclicity给一些标准。他们能被用于判定hypercyclicity非完全并且non-metrizable局部地凸的空格。为一些特殊局部地凸的空格，例如K?(LF)定序空格和quasi-Mazur空格的可计算的引入的限制，我们调查他们的hypercyclicity。当我们看，围住的biorthogonal系统在Ansari的构造起一个重要作用。而且，我们分别地获得典型条件局部地凸的空格跳了有稠密的线性跨度并且为局部地凸的空格的序列跳了吸收集合，它在判定围住的biorthogonal系统的存在是有用的。

简介：Inthispaper,thetheoryofQuasi-steadyisappliedtothecalculationsofturbochargersmatchingtothedieselenginesandperformanceprediction.Theengineperformancepredictionprogramswritteninlanguaechavebeenusedforcalculationsofvariousturbochargeddieselengines.Ithasbeenconfirmedbythecomparisonswithexperimentaldatathattheresultsofthecalcuationarereasonable,reliableandsatisfiedfortheengineeringapplications.

简介：在这份报纸，由使用，multivariate划分了差别接近部分衍生物和重叠，我们基于能复制线性多项式到计划的切开尺寸的技术扩大multivariate伪插值计划二次曲面的多项式。而且，我们给修改计划的近似错误。我们的multivariatemultiquadric伪插值计划仅仅要求地点点然而并非接近的功能的衍生物的信息。最后，数字实验证明我们的计划的近似率显著地被改进它与理论结果一致。

简介：Accordingtothetheoryoftestingasphericalsurfacebynormalaberrationcompensationmethod,thedesigningmethodofquasi-universalcompensatorisstudied.Onthebasisofthird-orderaberrationtheory,aftercalculatingandoptimizingwithanopticaldesignprogram,thestructureparametersofacompensatorareobtained.ThisnewcompensatorcouldbeusedinTwyman-Greeninterferometer,andinmeasurementofacertainrangeofparaboloidellipsoidandhyperboloid.Thecompensationaccuracyismorethan0.02λ.

简介：在这份报纸，我们与旋转对称为伪泛音范围的一个班获得Liouville类型结果。

简介：伪--牛顿方程为解决非线性的方程或非强迫的优化问题的系统在quasi-Newtonmethods起了一个中央作用。相反，平底锅建议了一个新方程，并且当时，证明它具有第二份订单第一份订单传统，在某些近似意义。在这篇论文，我们做二个方程的归纳作为特殊情况包括他们。概括方程被分析，并且新更改从它被导出。象DFP一样新更改在一套标准测试问题的计算实验超过了traditionalDFP更改。

简介：Basedonmonthlyrainfalldatafrom80stationsofChinafortheperiodofJanuary1951—February1985analysedintermsofthemaximumentropyspectrumandEEOF(extendedempiricalorthogonalfunction)techniques,thespatialandtemporalfeaturesofquasi-biennialoscillation(QBO)intherainfallareinvestigatedinadetailedmanner,withsomeresultsofinterestacquired.HighlyevidentistheQBOinrainfalloverChina,especiallythemidandlowerreachesoftheChangjiangRiver,theNEsideoftheQinghai-XizangPlateau,NorthChina,thesouthernpartofNEChina,areassouthoftheChangjiangRiverandoftheNanlingmountainregion,andmostofXinjiang.ThespatialwavedescribedbythefirstandsecondeigenvectorsofEEOFforeasternChinaisatypeofwavetravellingfromNEtoSW,indicatingthecycleofpatterns(inthesouthtonorthdirection):dryness(D)-wetness(W)-dryness(D)→southernW-northernslightD→W-D-W→southernD-northernslightW→D-W-Dagain,withthefloodedregionbetweentheChangjiangandHuangheRiversfortheD-W-DoccurrenceandwiththeChangjiangRiverasthedivisionforthesouthernW-northernslightDhappening.Thethirdandfourtheigenvectorsshowastandingwave-likefeatureforthesameeasternpart,indicatingthecycleofD-W-D→transition→W-D-W→transition→D-W-D,again,wherethetransitionmeansthegeneralweakeningofdroughtandfloodingandtheirsubsequentreversaldevelopment.Theamplitudesofthetimecoefficientsofthefirsttwoeigenvectorsareoppositeinthetrendoftheirchangestothoseofthenexttwoandshowaperiodof10—14years.

简介：1.IntroductionactEbeaHa~tOPologicalspaceandmamdritemeasureonitsBorela-algebraB(E).In[11,MOSCointroducedthefollowingnow-calledMoscoconvergenceofsyllUnetricac~l~:tlf621i.t,..2.1].AsequenceofsynUnetricbilinearforms(En,D(en)),nEN,issaidtoMO8coconvergetoa...

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简介：为有限的组的数量c(G)，q(G)和p(G)被H定义。Behravesh。在这篇文章，为轮流出现的这些数量组织一and对称的组Sn被计算。它被看那c(G)=q(G)=p(G)=n，当时G=orSn。给词调音：伪排列代表；轮流出现的组；对称的组；特性理论

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简介：Thispaperconsidersthequasi-stationaryStefanproblem:△u(x,t)=0inspace-timedomain,u=0andVv+δu/δv=0onthefreeboundary.underthenaturalconditionstheexistenceofclassicalsolutionlocallyintimeisprovedbymakinguseofthepropertyofFrechetderivativeoperatorandfixedpointtheorem.Forthesakeofsimplicityonlytheone-phaseproblemisdealtwith.Infacttwo-phaseproblemcanbedealtwithinasimilarwaywithmorecomplicatedcalculation.

简介：Aquasi-steadymodeldescribingaerodynamicsofhoveringRuby-throatedhummingbirdsispresentedtostudyextentofthelow-ordermodelinrepresentingtheflowphysicsofthebirdandalsotoseparatelyquantifytheforcesfromthetranslational,rotational,andaccelerationeffects.Realisticwingkinematicsareadoptedandthemodeliscalibratedagainstcomputationalfluiddynamics(CFD)simulationsofacorrespondingrevolving-wingmodel.Theresultsshowthatthequasi-steadymodelisabletopredictoverallliftproductionreasonablywellbutfailstocapturedetailedforceoscillations.Thedownstroke-upstrokeasymmetryisconsistentwiththatinthepreviousCFDstudy.Furtheranalysisshowsthatsignificantrotationalforceisproducedduringmid-strokeratherthanwingreversal.