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简介：Anovelbipolarconjugatedpolymercontainingtriphenylamineand1,3,4-oxadiazoleunitswassynthesizedbySuzukireaction.ItsstructureandpropertieswerecharacterizedbyNMR,IR,UV-Vis,PLspectroscopyandelectrochemicalmeasurement.Thephotoluminescentspectroscopyandcyclicvoltammogramsmeasurementdemonstratedthattheresultingpolymershowsblueemission(477nm)andpossessesbothelectronandhole-transportingproperty.

简介：ＰＡＲＡＢＯＬＩＣＥＱＵＡＴＩＯＮＳＷＩＴＨＢＯＴＨＮＯＮ－ＣＯＮＶＥＸＩＴＹＮＯＮＬＩＮＥＡＲＩＴＩＥＳＡＮＤＳＴＲＯＮＧＤＥＧＥＮＥＲＡＣＹＹｉｎＪｉｎｇｘｕｅ（尹景学）（ＩｎｓｔｉｔｕｔｅｏｆＭａｔｈｅｍａｔｉｃｓ，ＪｉｌｉｎＵｎｉｖｅｒｓｉｔ...

简介：Theauthorsstudyaporousmediumequationwitharight-handside.TheoperatorhasnonlocaldiffusioneffectsgivenbyaninversefractionalLaplacianoperator.ThederivativeintimeisalsofractionalandisofCaputo-type,whichtakesintoaccount'memory'.TheprecisemodelisD_t~αu-div(u(-Δ)~(-σ)u)=f,0<σ<1/2.Thispaperposestheproblemover{t∈R~+,x∈R~n}withnonnegativeinitialdatau(0,x)≥0aswellastheright-handsidef≥0.Theexistenceforweaksolutionswhenf,u(0,x)haveexponentialdecayatinfinityisproved.ThemainresultisH¨oldercontinuityforsuchweaksolutions.

简介：Aprobabilistieprogressivefailureanalyzingmethodisappliedtoestimatingthereliabilityofasimplysupportedlaminatedeompositeplatewithaninitialimperfectionunderbi-axialeompressionload.Theinitialimperfectionandthestrengthparametersareconsideredasrandomvariables.Ply-levelfailureproba-bilityisevaluatedbythefirstorderreliabilitymethod(FORM)togetherwiththeTsai-WustrengtheriterionandTancriterion.Currentstressesinthelaminatedstructurearecalculatedbytheclassicallaminationtheorywiththestiffnessmodifiedbasedonthelaststepplyfailure.Probabilistieallydominantply-levelfailurese-quencesleadingtooverallsystemfailureareidentified,basedonwhichthesystemfailureprobabilityisesti-mated.Anumeriealexampleispresentedtodemonstratethemethodologyproposed.Throughparameterstud-iesitisshownthatthedeviationoftheinitialimperfeetionandsomeofthestrengthparameterslargelyinflu-encethesystemreliability.

简介：包含尾-氨基酸和尾-aminophosphonate的结构的新奇organophosphorus混合物被设计并且综合。有P(OEt)的Arbuzov反应3，N-Boc保护了3不能提供的碘化物需要的产品但是2-oxazolidinone4因为Boc一半的附近组的参予。避免氨基甲酸酯的intramolecular参予，保护组的T被采用并且5负担得起的保护Ts的碘化物目标产品成功地。

简介：Inthispaper,aboundaryfeedbacksystemofaclassofnon-uniformundampedTimoshenkobeamwithbothendsfreeisconsidered.Alinearizedthree-leveldifferenceschemefortheTimoshenkobeamequationsisderivedbythemethodofreductionoforderonuniformmeshes.Theuniquesolvability,unconditionalstabilityandconvergenceofthedifferenceschemeareprovedbythediscreteenergymethod.Theconvergenceorderinmaximumnormisofordertwoinbothspaceandtime.Thevalidityofthistheoreticalanalysisisverifiedexperimentally.

简介：Bothenantiomersoffluoxetineweresynthesizedinfivestepsfromethylbenzoylacetate(1)usingmicrobial-chemicalapproachwithoverallyieldsof59%and62%respectively.(S)-Enan-tiomercanbeobtainedin>99%e.e.byrestingcellofbaker’syeastandtheRformwasproducedin81%e.e.byimmobilizedGeotrichumsp.G38.

简介：Pipesarewidelyusedtotransportgas,oilandwaterinindustries.Dragreductioninpipesisanincreasinglyconcernedproblemtosaveenergy.Someresearcheshaveindicatedthatthenon-smoothsurfacewithspecialstructurescanreduceflowloss.Inthispaper,anexperimentalinvestigationhasbeenperformedontheeffectsofakindofsurfacegrooveonthedraginbothrectangularandcircularductatdifferentReynoldsnumbers.Intheexperimentoftherectangularduct,totalpressureatbothinletandoutletweremeasured.Staticpressureonthewallwasmeasuredonthesurfacewithsmoothandgroovedfilmrespectively.Inthecircularduct,aboundarylayerpressureprobewasusedtomeasurethetotalpressuredistributionatbothinletandoutlet.Fourtapsatinletandoutletwereusedtomeasurestaticpressure.Thelosscoefficientisusedtoevaluatetheeffectsofthesurfacegrooveondragreduction.TheexperimentwasconductedwiththeReynoldsnumberrangefrom1.28×10~4to2.57×10~4.Theresultshowsamaximumdraglossreductionofapproximately2.4%inrectangularductatReynoldsnumberof2.4×10~4.A10%reductionofpipepressurelossbygroovedsurfaceismeasuredincircularductataReynoldsnumberof3.0×10~5.

简介：WeinvestigatethePainlevéintegrabilityofnonautonomousnonlinearSchrdinger(NLS)equationswithbothspace-andtime-dependentdispersion,nonlinearity,andexternalpotentials.ThePainlevéanalysisiscarriedoutwithoutusingtheKruskal'ssimplification,whichresultsinmoregeneralizedformofinhomogeneousequations.TheobtainedequationsareshowntobereducibletothestandardNLSequationbyusingapointtransformation.WealsoconstructthecorrespondingLaxpairandcarryoutitsKundu-typereductiontothestandardLaxpair.SpecialcasesofequationsfromchoosinglimitedformofcoefficientscoincidewiththeequationsfromthepreviousPainlevéanalysesand/orbecomeunknownnewequations.

简介：在一封初步的信(四面体Lett。2010，51，188)，我们报导了二个新基于一种肺结核特效药的四倍的结合氢的主题，这是，二monopodal(1a和1b)和五dipodal(2a，2b和3a3c)从在烃的dipodal主题的超分子的聚合物和泡的芳香的一种肺结核特效药衍生物，和形成。在这份报纸，我们在场有他们在水的媒介的自我装配的行为上的一个重音的这些结合氢的主题的性质上的一幅完整的图画。SEM，AFM，TEM并且荧光灯显微图显示所有dipodal混合物也在极的甲醇和水甲醇(多达50%水)形成泡混合物。控制实验证明1b不在一样的媒介形成泡。到dipodal混合物的溶液的1b的增加禁止后者形成泡的能力。在高集中，3b和3c另外gelate分离溶剂，包括的烃，酉旨，甲醇，和甲醇水混合。集中依赖者SEM调查表明3b和3c的泡熔化形成胶化和3c罐头de总数的胶化reversibly形成泡。

简介：ＴＨＥＧＥＮＥＲＡＴＩＯＮＯＦＮＯＮ－ＬＩＮＥＡＲＳＴＩＦＦＮＥＳＳＭＡＴＲＩＸＯＦＴＲＩＡＮＧＬＥＥＬＥＭＥＮＴＷＨＥＮＣＯＮＳＩＤＥＲＩＮＧＢＯＴＨＴＨＥＢＥＮＤＩＮＧＡＮＤＩＮ－ＰＬＡＮＥＭＥＭＢＲＡＮＥＦＯＲＣＥＳｚｈａｎｇＪｉａｎ－ｈａｉ（...

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简介：Acombinedphysicalmodelofbubbelgrowthispropsedalongwithacorrespondingbubblegrowthmodelforbinarymixturesonsmoothtubes.UsingthegeneralmodelofWangetal.^[1].andthebubblegrowthmodelforbinarymixtures,ananalyticalmodelfornucleatepoolboilingheattransferofbinarymixturesonsmoothtubesisdeveloped.Inaddition,nucleatepoolboilingheattransferofpureliquidsandbinarymixtruesonahorizontalsmoothtubewasstudiedexperimentally.Thepureliquidsandbinarymixturesincludedwatermethanol,ehanol,andtheirbinarymixtures.Theanalyticalmodelsforbothpureliquidsandbinarymixturesareingoodagreementwiththeexperimentaldata.