学科分类
/ 7
130 个结果
  • 简介:组G的Wielandt亚群,由w(G)表示了,是G的所有低于正常的亚群的normalizers的交叉。在这份报纸,作者为每整数i为最大的班G,为所有整数i的任何一个wi(G)=i(G)或wi(G)=i+1(G)的p组显示出那,并且为在有K1的G的每正常亚群K的w(G/K)=(G/K)。同时,为最大的班的常规p组的一个必要、足够的条件令人满意的w(G)=2(G)被给。最后,如果G是有基本z(G)的non-abelianp组,作者证明力量自守组PAut(G)是基本abelianp组?\mho1(G)\zeta(G)\cap\mho_1(G)。

  • 标签: WIELANDT不等式 P-群 次正规子群 极大 充分必要条件 无线网络
  • 简介:Theadsorptionprocessesofantibioticsofthetetracylinegroup(ATG)byseveralhome-madesulfocationitesarestudiedinthispaper.TheresultsshowthattheadsorptionmaybeofnonequivalentnormalityundercertainpHcondition.Theadsorptionmechanismisdiscussedwithinfraredspectrometry.ItcanbeconcludedthatATGcaninteractwithsulfocationitesbyionexchangemechanismorion-transfermechanismorbothofthem.

  • 标签: 吸附性 抗菌素 抗生素 四环素 磺基阳离子交换剂 离子交换机理
  • 简介:Thispaperconsiderssingle-machineschedulingproblemsingrouptechnologywiththejobs'processingtimesbeingsimplelinearfunctionsoftheirstarttimes.Theobjectivefunctionsaretheminimizingofmakespanandtotalweightedcompletiontime.SomeoptimalconditionsandalgorithmsaregivenandthefactthattheproblemoftotalweightedcompletiontimesisNP-hardisproved.

  • 标签: 排序问题 群论 工艺处理 时间约束 目标函数
  • 简介:让是四元数海森堡组,并且让P是仿射的自守组。我们上经由P的单一的代表在四元数海森堡组上开发连续小浪变换的理论。光线的小浪的一个班被构造。反的小浪变换被使用光线的小浪简化。然后,我们上调查氡变换。一个Semyanistyi-Lizorkin空格被介绍,在哪个上氡变换是bijection。我们由欧几里德几何学的Fourier变换和组Fourier变换在两个上处理氡变换。这二个处理是实质上相等的。如果小浪是光滑的,我们也由使用小浪给一个倒置公式,它不要求功能的光滑。另外,我们获得上与亚拉普拉斯算符联系的氡变换的一个倒置公式。

  • 标签: HEISENBERG群 RADON变换 小波变换理论 四元 拉普拉斯变换 反演公式
  • 简介:TheauthorsestablishsomeuniformestimatesforthedistancetohalfwaypointsofminimalgeodesicsintermsofthedistantcetoendpointsonsometypesofRiemannianmanifolds,andthenprovesometheoremsaboutthefinitegenerationoffundamentalgroupofRiemannianmanifoldwithnonnegativeRiccicurvature,whichsupportthefamousMilnorconjecture.

  • 标签: 基群 开流形 RICCI曲率 过分函数 RIEMANN流形 有限生成
  • 简介:LetAbeaunitalC*-algebra,n∈N∪{∞}.Itisprovedthattheisomorphism△n:Un0(A)/DUn0(A)→AffT(A)/△n0(π1(Un0(A)))isisometricforsomesuitabledistances.Asanapplication,theauthorhasthesplitexactsequence0→AffT(A)/△n0(π1(Un0(A)))iA→Un(A)/DUn(A)πA→Un(A)/Un0(A)→0withiAcontractive(andisometricifn=∞)undercertainconditionofA.

  • 标签: 迹空间 不变量 酉群 C^*代数 同胚群 等距群
  • 简介:Inthispaper,wegivetheholomorphicautomorphismgroupofthehigher-dimensionalgeneralizationofThullendomain.

  • 标签:
  • 简介:在这份报纸,为有海森堡组上的重量的第一顺序插值不平等的足够、必要的条件被给。必要性被海森堡组的极的坐标变化讨论。由插值为功能和Hardy-Sobolev类型不平等经由一个新表示公式建立强壮的类型不平等的一个班,我们导出充足。最后,为强壮的类型不平等的锋利的常数是坚定的。

  • 标签: HEISENBERG群 HARDY型不等式 插值 一阶 重量 充分必要条件
  • 简介:Thetitlepolymerwaspreparedfrom5-diethylamino-3-thia-pentylglycidyletheranddiethyleneglycolbisglycidyletherviaring-openingcopolymerization.Itwasfoundthatthisreactioncouldbecatalyzedbysodium,butnotLewisacid.Theobtainedpolymercancoordinatewithplatinumcompound,andtheplatinumcomplexisanewkindofcatalystforthehydrosilylationofolefinswithtriethoxysilane.

  • 标签: CROWN ETHER CROWN ETHER POLYMER Platinum
  • 简介:DigitaldecayspectroscopyofactinideisotopesatthegasfilledseparatorSHANSAlloverthechartofnuclides,theregiontothe“north-east”of208Pb,withZ≥84andN=128~130,hoststheshortest-livedαradioactivities,withhalf-livesintherangeofnanosecondstomicroseconds.Synthesisanddetectionofneutron-deficientisotopesabovethoriuminthisregionarechallengingduetotheirlowproductioncrosssectionsandshorthalf-lives.

  • 标签:
  • 简介:Thispaperreportsthekineticsofgrouptransferpolymerization(GTP)ofethylacrylate(EA)withzinciodidecatalystin1,2-dichloroethaneusingdimethylketenemethyltrimethylsilylacetal(MTS)asinitiatorat0℃andabove0℃.Theamountofcatalystusedwasstudied.Whenzinciodidecatalystusedismorethan10mol%relativetomonomer,therateofpolymerizationisproportionaltotheconcentrationofmonomer,whereaszinciodidecatalystusedislessthan10mol%ofthemonomer,therateofpolymerizationisindependentofthemonomerconcentration.IntheGTPofEAaninductionperiodwasobservedwhenthezinciodidecontentsarelessthanl0mol%.Ifthereactiontemperatureisover0℃,livingspeciesbecomeunstableanddiminish,leadingtoincompletemonomerconversion.Thereactioncurvesequationsareobtained.Thepolymershavenarrowmolecularweightdistributionswhicharenotchangedasdecreasingzinciodidecontents.Thepolydispersityisabout1.2.

  • 标签: Group TRANSFER POLYMERIZATION LIVING POLYMERIZATION Polyethyl
  • 简介:在氧气体的处理以后,包含胺组的小分子能射出荧光。氧化被相信在荧光中心的形成起一个重要作用。比作以前的结果,小分子和大分子可能有一样的荧光中心。

  • 标签: 荧光发射 氧化作用 氧气 小分子 大分子
  • 简介:Interestinthenonlinearpropertiesofmulti-modeopticalwaveguideshasseenarecentresurgenceonaccountofthelargedimensionalityaffordedbytheplatform.Thelargevolumeofmodesinthesewaveguidesprovidesanewspatialdegreeoffreedomforphasematchingnonlinearopticalprocesses.However,thisspatialdimensionisquantized,whichnarrowstheconversionbandwidthsofintermodalprocessesandconstrainsspectralandtemporaltailoringofthelight.Hereweshowthatbyengineeringtherelativegroupvelocitywithinthespatialdimension,wecantailorthephase-matchingbandwidthofintermodalparametricnonlinearities.Wedemonstrategroup-velocity-tailoredparametricnonlinearmixingbetweenhigher-ordermodesinamulti-modefiberwithgainbandwidthsthataremorethananorderofmagnitudelargerthanthatpreviouslythoughtpossibleforintermodalfour-wavemixing.Asevidenceofthetechnologicalutilityofthismethodology,weseedthisprocesstogeneratethefirsthigh-peak-powerwavelength-tunableall-fiberquasi-CWlaserintheTi:sapphirewavelengthregime.Moregenerally,withthecombinationofintermodalinteractions,whichdramaticallyexpandthephase-matchingdegreesoffreedomfornonlinearoptics,andintermodalgroup-velocityengineering,whichenablestailoringofthebandwidthofsuchinteractions,weshowcaseaplatformfornonlinearopticsthatcanbebroadbandwhilebeingwavelengthagnostic.

  • 标签: NONLINEAR properties WAVEGUIDES OPTICAL PROCESSES
  • 简介:TheNb-bromomethylderivative(2)ofgelsemine,aquaternaryammoniumsalt,wasfoundtoberecalcitranttowardHofmanntypealkalinedegradationwhichhasbeensuccessfulinothercases.Instead,are-distributionoftheN-methylgrouptookplace,givingriseto3a,1,3band3c,indescendingorderofRfvalues.

  • 标签: DESCENDING hasbeen GIVING ALKALINE derivative toward
  • 简介:Thescientificprogramofthegroupcoversbigbangnucleosynthesis,hydrostaticburninginstarsandexplosivenucleosynthesisinsupernova.Byconsideringnon-equilibriumstatistics,wesuggestapossiblewaytosolvetheLiprobleminbigbangnucleosynthesis.The13C(α,n)16Oisthemajorneutronsourceforthes-processhappeninginAGBstars.The19F(p,α)16Oisrelevanttotheproductionoffluorine.WearedevelopingexperimentalplatformstostudytheimportantreactionforthefirsttimedirectlyattheirstellarenergiesinJinpingUndergroundLaboratory.The59Festellardecayrateisimportantfortheproductionof60Fe,animportantisotopewhosegammarayhasbeenobservedbysatellites.WedetermineitsstellardecayrateforthefirsttimeusingexperimentalB(GT)strength.Thenewratereducesthediscrepancyofthe60Feyieldsbetweenthemodelpredictionsandtheobservations.Theundergroundexperimentisexpectedtobeginin2018.

  • 标签: