简介：§1.IntroductionThedeterminationoftheRamseynumbersisamainprobleminthestudyofthecombinatorialmathematicsandgraphtheory.However,itisstillaverydifficultunsolvedproblemtodate.HenceevaluationofthelowerboundoftheRamseynumbersseems(tobe)verynecessary.Abbott,H.L.[1]showedthataspecialformulaofthelowerboundoftheRamseynumbers:R(2~n+1,2~n+1)≥5~n+1.Erd(o|¨)s,P.andSpencer,J.[2]obtainedthataformulaofthelowerboundoftheRamseynumbersR(s,t)

简介：Inthispaper,wegivetheexactlowerdensityofHausdorffmeasureofaclassofsymmetricperfectsets.

简介：InthispaperlowersemicontinuityofthefunctionalI(u)=∫Ωf(x,u,↓△Hu)dxisinvestigatedforfbeingaCarathéodoryfunctiondefinedonH^n×R×R^2nandforu∈SBVH(Ω),whereH^nistheHeisenberggroupwithdimension2n+1,Ω属于H^nisanopensetand↓△HudenotestheapproximatederivativeoftheabsolutecontinuouspartD^aHuwithrespecttoDHu.Inaddition,aLusintypeapproximationtheoremforaSBVHfunctionisproved.

简介：让G至多是最大的度的一张图四。由使用被B介绍的重叠矩阵方法。Mohar，我们证明G的平均的类是它的最大的类的不少于1/3，并且界限是最好的可能。另外，平均的类的新更低的界限以尺寸被导出。

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简介：InordertolightentheburdenofhealthcareworkersandhelppeoplewithLowerlimbinsufficiencytodorehabilitationtraining,thispaperdesignsamodelnamedexoskeletonsrehabilitationrobottosimulatethehumangait,includingexoskeletonsandscooterstructure,anddesignsthedrivermodule.Finally,thispaperusesWorkbenchsoftwaretodothestressandstrainanalysis,whichvalidatesthereliabilityofthewholedesign.

简介：Thelowerboundsonthemaximumgenusoflooplessgraphsareobtainedaccordingtotheconnectivityofthesegraphs.ThisnotonlyanswersaquestionofChen,ArchdeaconandGross,butalsogeneralizesthepreviousknownresults.Thus,apictureofthelowerboundsonthemaximumgenusoflooplessmultigraphsispresented.

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简介：目的将在更低的手足讨论ischemic挛缩的功能的重建的方法并且基于它的严厉和预后在更低的手足为ischemic挛缩建议一个分类协议。有在更低的手足的ischemic挛缩的42个病人全部的方法A在这研究被包括。根据骚乱的不同类型和严厉，由神经解压缩组成的外科的重建，腱变长或转移的度，内在的脚肌肉版本和小腿腹胫骨的神经吻合在每个病人被执行。手术后地结果，所有病人能走在扁平的地面上。落下脚在10个病人被改正，并且5个病人仍然在楼梯活动期间感到了一些困难。到屈肌hallucislongus腱的裂口跟腱转移在12个病人被执行，并且他们的走的稳定性被改进。七个病人接受了在5个病人在2个病人和S3到达到S2的ipsilateralsuraltibial神经吻合，和敏感恢复。在更低的手足的结论Ischemic挛缩是在更低的手足损伤以后的破坏复杂并发症。挛缩的预防比确定的挛缩的治疗更重要。到屈肌hallucislongus腱和小腿腹胫骨的神经吻合的裂口跟腱转移，被我们开始实现，能在更低的手足改进ischemic挛缩的功能的恢复，并且因此在更低的手足为ischemic挛缩的功能的重建提供一种新选择。

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

简介：ArangesurveydatabaseisestablishedandusedtostudythedepositionorerosionprocessesintheLowerYellowRiver(LYR).Thehugeamountofdataobtainedthroughrangesurveysovernearly50yearsismanagedbysoftware(RGTOOLS)developedforthisstudy.RGTOOLSisalsousedtoevaluatetheamountanddistributionofdepositionorerosioninLYR.Volumetricmethodisusedforcomputationoftheamountofdeposition.Spatialandtemporalvariationsofthedepositionarestudiedandillustratedwithdrawings.Itisfoundthatatotalof6.44billionm3ofsedimentweredepositedinthelowerYellowRiveroverapproximately50years.Thepatternofdepositionvariesinresponsetothevariationofoncomingflow,whichisinfluencedbynaturalclimaticvariationsandalsobyreservoiroperation.

简介：Objective:Toexploreatreatmentapproachforseverelyinjuredlowerextremities.Methods:Thedataof42patientswithseverelytraumaticlowerextremitiesfrom1989to1999wereretrospectivelyreviewed.AccordingtoMESS(mangledextremityseverityscore)themeanscoreofallthelimbswas6.24±1.45,34caseshadMESSscore<7and8caseshadMESSscore≥7.Treatmentapproachesincludedmicrovascularanastomosistechnique,compoundtissueflaptransplantationtechniqueandcompoundbonetissueflaptransplantation.Conclusions:Successfulemergencytreatmentofseverelyinjuredlowerextremitiescouldbeachievedbyusingmicrosurgerytechniquesandstrictcontrollingoflowerextremitysalvagelindications.

简介：让T是在一个Banach空格的一个围住的线性操作符，与蟽(T)={1}。In1983，Esterle-Berkani's推测为差别的腐烂被建议(我—T)T~n如下：任何一个liminf_(n→∞)(n+1)‖(信息技术)T~n‖≥1/e或T=我。我们证明这个主张并且讨论一些它的后果。

简介：Inthisnote,theexplicitrepresentationsofMoore-Penroseinversesoflowertriangularoperatormatricesareestablished.Asanapplication,theexplicitrepresentationsofBott-DuffininversesofboundedlinearoperatorsonaHilbertspacewithrespecttoaclosedsubspaceareobtained.

简介：给定的L2(R)和一个有限序列{(r，r)}rR+XR由不同的点组成，相应小浪系统是函数$\left\的集合{{\frac{1}{{a_\gamma^{1/2}}}\phi(\frac{x}{{a_\gamma}}-\lambda_\gamma)\gamma\varepsilonr}\right\}$。我们为功能L2(R)的一个稠密的集合证明那相应于任何选择的小浪系统{(r，r)}r是线性地独立的，并且我们导出清楚的估计为相应更低(框架)跳。特别地，这为multiresolution分析在理论把限制放在可伸缩的功能的选择上。我们也为Gabor系统$\left\为更低的界限获得估计{{e^{2rie_{\gammax}}g(x-\lambda_\gamma)}\right\}为在L2(R)的一个稠密的子集的函数g的\gamma\varepsilonr$。

简介：AsimulationonthepropagationoflowerhybridwaveinEASTisconducted.Raytracing,evolutionoftheparallelrefractiveindex,andpowerdepositionprofilesinaD-shapedconfigurationwerecalculated.Resultsshowthatwavepropagationisaffectedbytheplasmacurrent,density,magneticfield,andpowerspectrum,etc.leadingtoadifferentpowerdeposition.ThisishelpfulinunderstandingtheLHCDexperimentsonEAST.

简介：与亢奋的分支被迈克尔增加与dodecylamine和甲基压克力在甲醇综合的十二烷基组一起的树枝状的分子作为原料吃了。这新型的树枝状的分子生动地被叫“在这的扫帚分子”报导。扫帚分子的水溶液的表面张力解雇了氨基的组被使用落下卷方法测量。为油/水(O/W)的扫帚分子的反乳化表演模仿了原油乳状液被检验。试验性的结果揭示了那，作为一表面活化剂新型，扫帚分子解雇了为O/W给反乳化看的氨基的组模仿的原油乳状液。

简介：ByusingtheobservationalO3dataofKunmingandHongKongduringtheperiodof1997-2001,thepaperstudiesthedistributionandvariationoftotalozoneinlowlatituderegionofChina.ThestudyshowsthatthecharacteristicsofvariationinKunmingandHongKongareverysimilar,andthetotalozoneinthewesternareasislargerthanintheeasternones.Itismaximuminsummerandminimuminwinter.

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简介：ＳＩＭＵＬＡＴＩＯＮＯＦＷＩＮＴＥＲＴＩＭＥＦＬＵＶＩＡＬＰＲＯＣＥＳＳＥＳＩＮＴＨＥＬＯＷＥＲＹＥＬＬＯＷＲＩＶＥＲＺｈａｎｇＢｏ－ｚｈｏｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＣｉｖｉｌａｎｄＥｎｖｉｒｏｎｍｅｎｔｉｎｇＥｎｇｉｎｅｅｒｉｎｇ，Ｃｌａｒｋｓ...