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116 个结果
  • 简介:Binary Reaction Mechanism of 28Si+24Mg at 156.3 MeVBinaryReactionMechanismof28Si+24Mgat156.3MeV¥WangShufang;JinGenm...

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  • 简介:Differentinterpretationsareintroducedtodescribetheuprisingoscillatorystructuresof^16O+^24Mgreaction.Thegrossresonantstructurestotheground-andfirst-excitedstateshavebeenstudiedsuccessfullyintermsofboththeDWBAandcoupledchannelcalculations.TheDWBAresultsintroduceareasonabledescriptionoftheangulardistributionsandexcitationfunctiondata.ThecoupledchannelcalculationsprovideabetteragreementwiththeexperimentalforwardandbackwardangledatathantheDWBAcalculations.

  • 标签: 核反应 重离子反应 ^16O ^24Mg
  • 简介:A(k;g)-graphisak-regulargraphwithgirthg.A(k;g)-cageisa(k;g)-graphwiththeleastpossiblenumberofvertices.Letf(k;g)denotethenumberofverticesina(k;g)-cage.Thegirthpairofagraphgivesthelengthofashortestoddandashortestevencycle.Afc-regulargraphwithgirthpair(g,h)iscalleda(k;g,h)-graph.A(k;g,h)-cageisa(k;g,h)-graphwiththeleastpossiblenumberofvertices.Letf(k;g,h)denotethenumberofverticesina(k;g,h)-cage.Inthispaper,weprovethefollowingstrictinequalityf(k;h-1,h)h),k≥3,h≥4.

  • 标签: CAGES GRAPH GIRTH pair REGULAR GRAPH
  • 简介:LetZbeatopologicalspaceandmappingA2:Z→B(H)withclosedrangeR(A2)becontinuous.SomenecessaryandsufficientconditionsofthecontinuityofM-PinversesAz+aregivenin[1],[2].ItisoneofthemthatAZ+iscontinuousifanaonlyifAZ+islocallybounded.Inthispaper,wediscussthefollowingproblem:iflimAn=A0inB(H)and||An+||isunbounded(i.e.theabovenecessaryandsufficientconditionfails),whathinHwillmaketheequations:limAm+h=A0+horw-limAn+h=A0+hbetrue.Forthispurposethreetheoremsandanerrorestimationaregiveninthispaper.

  • 标签: GENERALIZED INVERSE pertubation.
  • 简介:SYNTHESISOF3-ARYL-1(2H,4H)ACRIDONESANDTHEIRDERIVATIVES¥RongYIN;GuangFanHAN;YuTianLI(DepartmentofMedicalLaboratory,JilinMediea...

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  • 简介:1IntroductionLetA∈Cn×n,B∈Cn×n.WesayBisasquarerootofAifA=B×Bi.e.A=B2.Itiswell-knownthatanysymmetricpositivedefinitematrixexistsoneandonlyonesquarerootwhichisasymmetricpositivedefinitematrix,too(e.g.see[5]).Higham[4]studiedcarefullytherelationofarealnonsingularmatrixbetweenitsrealsquarerootsanditseigenvalues.AlefeldandSchneider[1]pointedoutthatforanynonsingularM-ma-trixthereisoneandonlyoneM-matrixasitssquareroot.Inthispaper,westudyona

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  • 简介:Thispaperreportstwolanthanidecomplexesofformula(C9H7)Ln(C8H8)·(THF)2whereLnisProrNd,C9H7isindenyl,andC8H8iscyclooctatetraene(COT).ThecomplexeswerepreparedbythereactionofLnCl3withK(C9H7)andK2(C8H8)inTHF.(C9H7)Pr(C8H8)·(THF)2crystallizesinTHFat-15℃inthemonoclinicspacegroupP21:withunitcelldimensionsa=8.446(0),b=10.083(2),c=13.407(3),β=105.48(1)°,V=1100.43(35)3,Dc=1.52g/cm3andZ=2.ThefinalRvalueis0.033,Rwvalueis0.030,respectively.In(C9H7)Pr(C8H8)·(THF)2afive-memberedringcentroidofC9H7,theC8H8ringcentroidandthetwooxygenatomsfromthetwoTHFmoleculesformadistortedtetrahedralgeometryaroundthemetal.

  • 标签: complexes monoclinic membered C8H8)Ln C8H8)Pr C9H7
  • 简介:文献[1]提出了相关系数平稳过程并讨论了它的参数估计方法,其参数估计值采用了数值迭代法·本文在[1]的基础上对一种特殊的相关系数平稳序列的均值和方差提出一种具体的解决方法·得到了确切的均值和方差的参数估计表达式.

  • 标签: 随机序列 相关系数平稳过程 极大似然估计
  • 简介:Thesolidaddofthefirstprotonatedzincoborophosphate,(H3O)Zn(H2O)2BP2O8·H2O(1),wassoventothermallysyn-thesizedbythereactionofZn(NO3)2·6H2OandH3BO3withH3PO4inamixedsolvent,andstructurallycharacterizedbysingle-ystalX-raydiffractionanalysis.ItcrystallizesinthehexagonalP6122,a=0.9604(4)nm,c=1.5297(6)nm,V=1.2218(8)nm^3,Dc=2.921g/cm^3,Z=6,F(000)=1080,μ=3.495mm^-1.Thestmchwefeaturesthatthetetrahedra-te-trahedrahdlcesinterconnectedbyoctahedraandstronghydro-gembondinteractionsformathree-dimensionalframework.Theprotonatedwatermoleculesarelocatedatuniquepositions.othercharacterizationsbyIRandthermalanalysisarealsode-scribed.

  • 标签: (H3O)Zn(H2O)2BP2O8·H2O 合成 结构 质子化 螺旋带状物 硼磷酸锌化合物
  • 简介:有N-(2-propionic酸)的新奇金轧(III)建筑群-salicyloylhydrazone(C10H10N2O4,H3L)并且1,10-phenanthroline(C12H8N2,phen)被准备并且描绘。水晶结构[Gd(H2L)(HL)-(H2O)3]2潲楰湯捩???慳楬祣潬汹?票牤穡湯??ㄠ??桰湥湡桴潲楬敮???????楢慯瑣癩瑩?

  • 标签: 邻二氮杂菲 晶体结构 X射线衍射 三斜晶系
  • 简介:WegiveaCliffordalgebracharacterizationofclassicalHardyspacesHp(R+n+1),0

  • 标签: 艺人 气石