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简介：Inthispaper,problemofcharacterizingthecityblockdistancebetweentwolatticepointsink-dimensionalEuclideanspaceisdiscussed.

简介：Thenecessaryandsufficientconditionsfortheexistenceofsimpleincompleteblockdesign(v,w;4,2)-IPBDsaredetermined.Asaconsequence,thenecessaryandsufficientconditionsfortheembeddingsofsimpletwo-foldbalancedincompleteblockdesignswithblocksize4arealsodetermined.

简介：有部分微分方程的优化问题在科学和工程的许多区域广泛地作为限制产生，特别地处于设计的问题。抑制PDE的优化问题的如此的类的解决方案通常是一项主要计算任务。因为为直接寻求抑制PDE的优化问题的答案的肤色，我们由使用Galerkin把它转变成僵绳点形式的线性方程的一个系统有限元素的discretization。为discretized线性系统，在这份报纸，我们构造一块对称并且block-lower-triangularpreconditioner，为解决抑制PDE的优化问题。两preconditioners利用系数矩阵的结构。为相应preconditioned矩阵的特征值和特徵向量的明确的表情被导出。当规则化参数是合适小的时，数字实现证明这些块preconditioners能为preconditionedGMRES方法导致令人满意的试验性的结果。[从作者抽象]

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简介：让D是任何部门戒指，并且让是k×k的集合(k≥2)矩形的块在D上的三角形的矩阵。为A，B∈，如果等级(−B)=1，然后，A和B被说由∼邻近、表示B。地图φ：被说如果，是在两个方向保存地图的毗邻∼B如果并且仅当φ(A)∼φ(B)。让G所有毗邻的转变组上在两个方向正在保存bijections。什么时候m1,nk≥2，我们描绘G的代数学的结构，并且获得矩形的块的基本定理在D上的三角形的矩阵。

简介：Anewblock-basedfractalimagecodingalgorithmcalledFractalBlockCodinginResidueDomain(FBCRD)isproposed.InbasicFractalBlockCoding(FBC)algorithm,eachblock(calledrangeblock)isencodedbyanaffinemappingfromadomainblockwithinthesameimagetoitself.Thedecoderusestheparametersofthesemappingstosynthesizethereconstructedimagethroughaniterativeprocedure.FBCRDisamodificationofbasicFBC.InFBCRD,rangeblocksanddomainblocksareallresidueblockssubtractedfromtheirblockmeansandboththeparametersofaffinemappingsandblockmeansarecoded.Thismodificationleadstofeweriterationsatthedecoder.AnoptimizeddecodingstrategyisalsointroducedwhichreducestotaldecodingtimebymorethanhalfofthatofbasicFBC.Thisimprovementisfavorableforrealtimeimplementationoffractalimagecompression.

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简介：Trellisstructuresofblockcodesarediscussed.L-sectiontrellisstructuresofsomeBCHcodesarepresented.AfastmaximumlikelihooddecodingalgorithmforBCHcodesisproposedcorrespondingly,thedecodingproblemofq-aryimagesofqm-aryblockcodesisalsodiscussed.Thedirect-sumpartitionandtheassociateddecodingalgorithmsaregivenfortheimages.

简介：ThisstudyfocusesonthebasementstructureoftheParanáBasininSouthAmerica,basedongeologicalandgeophysicaldata.ItisalargeintracratonicbasinformedfromtheLateOrdovicianuntiltheCretaceous,whenasequenceofcontinentalfloodbasaltseruptionscoveredtheentirebasin,precedingthebreak-upofWesternGondwana.Isostaticmodelingwasappliedtolargegravitysurveyscomprisingmorethan12,000gravitystations.TheresidualBougueranomalypattern,representingthecrustalcontributionofthecrystallinebasement,aswellasthesedimentaryandvolcaniclayersofthebasin,revealssimilaritiesbetweenthebasementgravitysignatureandtheexposedrock.ThestresspatternsoftheLateOrdovicianandCretaceoustectoniceventspresentageographicallycoincidentmaximum,andthecorrelationbetweengravityhighsandthemainattenuation(betafactor)suggeststhepresenceofsomepreexistentsuturezones.TheresultantmosaicofgravityblocksandthelocationofmajorfaultsgivesupporttothepresenceofanimportantProterozoiccratonicfeature,herereferredtoasParanapanemablock.

简介：1IntroductionandPreliminariesItiswellknownthatthesmallestsingularvalueofamatrixisimportantinmatrixthoeryandapplications.VarahandQi,Johnsongavesomeresultsonlowerboundofthesmallestsingularvalue[1—4].Here,weusetheblockpartitionedformofamatrixtoob-taingeneralizedlowerboundsforσn（A）.Furthermore,byscalingwithamatrixDweob-tainanewlowerboundforσAofmatriceswhicharenotpositivedefinitematrices.

简介：Inthispaper,theL^2-boundednessofaclassofparametricMarcinkiewiczintegralμa,h^pwithkernelfunctionΩinBq^0.0(s^n-1)forsomeq>1,andtheradialfunctionh(x)∈l∞(L^s)(R+)for1

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简介：我们为达到块共聚物(BCP)的底部形态学表明一条一般途径薄电影。在我们PS-b-PMMA电影上的以前的大小，BCP电影的表面形态学地图揭示了在哪儿的不同订的政体对接口和这些形态学共存的中间的政体主要垂直或平行的柱体东方。然而，这个更早的工作没探索BCP薄电影的底部形态学。在这研究，我们在在表面上有垂直柱体形态学的演员组块共聚物电影在稳固的底层附近调查了块共聚物形态学。

简介：Basedonelementarygrouptheory,theblockpivotmethodsforsolv-ingtwo-dimensionalelasticfrictionalcontactproblemsarepresentedinthispaper.Itisprovedthatthealgorithmsconvergewithinafinitenumberofstepswhenthefrictioncoefficientis'relativesmall'.Unlikemostmathematicalprogrammingmeth-odsforcontactproblems,theblockpivotmethodspermitmultipleexchangesofbasicandnonbasicvariables.

简介：WepresentsomerepresentationsforthegeneralizedDrazininverseofablockmatrixx=[abcd]inaBanachalgebraAintermsofa~dand(bc)~dundercertainconditions,extendingsomerecentresultrelatedtothegeneralizedDrazininverseofananti-triangularoperatormatrix.Also,severalparticularcasesofthisresultareconsidered.

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简介：Thesymmetriclinearsystemgivesusmanysimplificationsandapossibilitytoadaptthecomputationstothecomputerathandinordertoachievebetterperformance.TheaimofthispaperistoconsidertheblockbidiagonalizationmethodsderivedfromasymmetricaugmentedmultiplelinearsystemsandmakeacomparisonwiththeblockGMRESandblockbiconjugategradientmethods.

简介：让L是块类型在上的谎言代数学与基础{L，i|，我}并且方括号[L，i,L,j]=((i+1)-(j+1))L+，i+j。在这份报纸，我们首先构造L的正式分发谎言代数学。然后，我们决定它的保角的代数学B与[]基础{L(w)|}并且方括号[L(w)L(w)]=(+(+))L+(w)。最后，我们给免费中间的系列B模块的一个分类。