简介：本文首先介绍了粒子群算法（PSO）的基本模型及其运行机制；然后，通过粒子迭代位移、轨迹分析和函数上的参数试验，研究了c1，c2参数对粒子行为和算法进化性能的影响，以及对粒子目标识别和方向感的影响；接着，又探讨了PSO中的解的更新空间不断塌缩、粒子的“游荡”与“振荡”、粒子进化与多样性损失等几个确定性现象和随机性搜寻的必要条件；最后，分析了早熟收敛和局部收敛的原因。通过研究，加深了对粒子群算法（PSO）基本模型运行机制的认识和对C1，c2参数特性的了解。

简介：The12C+13Csystemhasbeenstudiedextensively,becauseofthesimilarityoftheentrancechanneltotheastrophysicallyimportant12C+12Creaction[1??3].Untilnow,threedifferentmethodshavebeenexploitedtoperformthefusioncrosssectionmeasurementsfor12C+13CundertheCoulombbarrier:(1)measuringtheyieldofcharacteristicrays,(2)thetotal-rayyieldsusingNaIsummingdetectorsand(3)theactivityofthereactionresidue24Na(T1=2=15.0h).Recently,thefusioncrosssectionof12C+13Chasbeenmeasureddownto0.9nbthroughtheactivitymeasurementbyourgroup[4].Althoughthestatisticalmodelcalculationsinallthesethreemethodshavebeenroutinelyusedtoconverttheobservedpartialcrosssectionsintothetotalfusioncrosssections[5],thesystematicuncertaintyinducedbythestatisticalcorrectionshasnotbeenstudiedverywell.

简介：作者在C上给围住的双线性的表格的Fourier变换的描述*(S1)×C*(二基础半的S2)以乔丹组织S1和S2*-representations,hemimogeneous随机域，并且象一样微弱地，harmonizable随机S回答1和S2直到Hilbert空格。

简介：我们学习形式的非线性的堕落椭圆形的问题的解决方案的存在结果，—div(一(x，u，∇u))在Ω的=F，在Ω是ℝN,N≥的一个围住的领域的地方2，一：Ω×ℝ×ℝN→ℝN是Carathéodory功能令人满意自然生长条件和coercivity调节，但是他们验证仅仅大单音的强健。第二条款F属于W−1,p′(Ω,w*)。存在结果被使用L1-version证明薄荷的词根。

简介：1．对比热容的概念缺乏理解例1由Q=cm（t-t0）可得：c=Q／m（t-t0），关于同一种物质的比热容c．下列说法正确的是（）

简介：本文主要讨论意义更为一般的广义逆矩阵AT,s^（2）的若干性质及在解限制性线性方程组方面的应用．

简介：本文介绍由三片集成块ＣＳ８２０４、ＷＥ９１４０Ａ、ＴＥＡ１０６１组成的典型电话机电路，主要分析电话机的电源供给电路、振铃电路、拨号电路和通话电路。

简介：讨论c（Г）单位球面问等距算子的延拓问题，给出c（Г）单位球面间的等距算子可实线性等距延拓的充要条件．

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简介：让A是unitalAF代数学(简单或非简单)并且让伪是A的自守。假定伪有某些Rokhlin性质，A是伪-简单。也假定有整数J鈮?1以便伪*0J=标志K0(A)。作者证明那A吗？伪？让tracial评价零。关键词Rokhlin性质-Tracial等级零-AF代数学2000苏布杰克特先生分类46L35-46L55工程由国家天赋支持了中国的科学基础(Nos.10771069，10671068)并且上海优先级大学教师学科(没有。B407)。

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简介：Animidazolemodifiedsilverelectrodeispreparedbyimmersingthesubstratesilverelectrodeina2%imidazolesolutionofethanolat50℃for10min.Themodifiedelectrodeisthensweptinacytochromecsolutionandthemodifiedlayertakesoffbecausethemodifiedelectrodeisveryunstable.Althoughtheamountofthesilver-imidazolecomplexisverysmallcomparedwiththeamountofcytochromecintheproteinsolution,itgreatlyfacilitatesredoxreactionsinvolvingthebiomacromolecules.

简介：对维林金系统{ψ,n≥1}和0＜α＜1定义极大算子σ^α＊f：=sup│σ^αnf│，其中σ^αnf是函数f的（C，α）平均值．证明了算子σ^α＊是（p，p）型（1〈P〈∞）和弱（1，1）型．另外‖σ^α＊f‖1≤C‖f‖H1,，其中H1是Hardy空间．利用上述结果，证明了对任一可积函数f，σ^αnf几乎处处收敛于f．

简介：Thisarticleprovestheexistenceofsingulardirectionsofvaluedistributiontheoryforsometranscendentalholomorphiccurvesinthen-dimensionalcomplexprojectivespacePn(C).Anexampleisgiventocomplementtheseresults.

简介：Inthispaper,MPt/C(M=La,Nd)catalystsofPEMFCweresynthesizedbymicrowaveradiationprocess.ThecrystallinityandstructureofcatalystswererespectivelyanalyzedbyXRDandnitrogenadsorptiontests.Theactivityofcatalystswasinvestigatedbyelectrochemistryexperiment.Theresultsshowedthat:1)comparedwithPt/Ccatalystpreparedbytypicalimpregnation-reductionprocess,thesizeofMPt/CcatalystparticledecreasedandtheavailablecrystalforO2reductionincreased;2)theMPt/CcatalystshadrelativelyhighBETsurfaceareas;and3)thesecrystaltransformationsoftheMPt/Ccatalystbroughthightheelectrocatalyticactivity,andasaresult,improvedthepowerofPEMFC.

简介：Itiswellknownthateveryprimeidealminimaloveraz-idealisalsoaz-ideal.TheconverseisalsowellknowninC(X).ThuswheneverIisanidealinC(X),thenI~(1/2)isaz-idealifandonlyifIis,inwhichcaseI~(1/2)=I.Weshowthesamefactforz~o-idealsandthenitturnsoutthatthesumofaprimaryidealandaz-ideal(z~o-ideal)inC(X)whicharenotinachainisaprimez-ideal(z~o-ideal).Wealsoshowthateverydecomposablez-ideal(z~o-ideal)inC(X)istheintersectionofafinitenumberofprimez-ideals(z~o-ideal).Somecounter-examplesingeneralringsandsomecharacterizationsforthelargest(smallest)z-idealandz~o-idealcontainedin(containing)anidealaregiven.

简介：TheconstructionofadsorptivetypeC60modifiedelectrodeanditselectrochemicalreductionandoxidationbehaviorinaqueoussolutionsaredescribedinthisreport.Fourpairsofone-electrontransferreductionandoxidationcyclicvoltammetryisobtainedinaqueoussolutioncontaining30%CH3CNand2%(C2H5)4NOH.ItisreportedinthispaperthattheC60modifiedelectrodealsocatalyzestheelectrochemicalreductionofdissolvedoxygenin40%DMFand2%(C2H5)4NOHaqueoussolutionandthismightopenanewfieldforthepotentialapplicationsofC60inelectrochemistryandelectroaualyticalchemistry.

简介：Theapplicabilityandlimitationofseveralquadraticstrengththeorieswereinvestigatedwithrespectto2D-C/SiCand2.5D-C/SiCcomposites.Akindofdamage-basedfailurecriterion,referredtoasD-criterion,isproposedfornonlinearceramiccomposites.Meanwhile,thenewlydevelopedcriterionispreliminarilyvalidatedundertension-shearcombinedloadings.ThepredictionshowsthatthefailureenvelopegivenbyD-criterionislowerthanthatfromTsai–HillandHoffmancriteria.Thisrevealsthatthedamage-basedcriterionisreasonableforevaluationofdamage-dominatedfailurestrength.

简介：摘要刻画了|C(S)／L|≤2的完全正则半群S的同余格的具体特征，给出了具有上述性质的所有完全正则半群的分类．

简介：AnaturalcompactificationofthevirtualconfigurationspaceofNpointsontheRiemannsphereisconstructedbyusingcross-ratios.WeshowthatthiscompactificationishomeomorphictotheBers’compactificationofthevirtualmodulispaceofapuncturedRiemannsphereoftypeN.Inparticular,thesystemofglobalandexplicitcoordinatesofthisstandardcompactificationisgivenbycross-ratios.