简介：TheLa-CosubstitutedSr_（1–x）La_xFe_（12–x）Co_xO_（19）（x=0–0.5）ferriteswithappropriateBi_2O_3additivewerepreparedbyconventionalsinteringmethodandmicrowavesinteringmethodatlowsinteringtemperaturescompatiblewithLTCC（lowtemperatureco-firedceramics）systems,andtheirsinteringbehaviorwaschieflyinvestigated,includingthecrystalstructure,saturationmagnetizationMs,magneticanisotropyfieldHa,intrinsiccoercivityHci,andCurietemperatureTC.ExperimentresultsclearlyshowedthatthepureM-typecrystalphasewassuccessfullyobtainedwhentheLa-Cosubstitutionamountxdidnotexceed0.3.However,thesingleM-typephasestructuretransformedtomultiphasestructurewithfurtherincreasedx,wheretheM-typephasecoexistedwiththenon-magneticphasesuchasα-Fe_2O_3phase,La_2O_3phase,andLaCoO_3phase.AppropriateLa-CosubstitutionimprovedtheMs（〉62emu/g）,Ha（〉1400kA/m）,andHci（〉320kA/m）fortheferriteswithxvaryingfrom0.1to0.3,buttheTCdecreasedwithincreasingsubstitutionamount.Moreover,themicrowavesinteredferritescouldprovidelargerHciandsimilarMscomparedwiththeconventionalsinteredferrites.

简介：La公司代替了M类型钡铁酸盐(欺骗)由传统的稳固的状态被准备在低温度(1173K)的方法和sintered。X光检查衍射(XRD)，扫描电子显微镜学(SEM)和颤动的样品磁强计(VSM)被采用在样品的结构和磁性上调查La公司的影响。由在为在空中的6h的1173K的sintering，有Ba(LaCo)xFe122xO19(x=0.00.5)的化学作文的单个阶段M类型钡铁酸盐被形成。M-H曲线证明钡铁酸盐的磁性被La公司替换显然完成。浸透磁化(女士)和coercivity(Hc)分别地到达了65.15Am2/kg和4165Oe的最大的价值。这行为被归因于La公司替换和粒子尺寸的地点。SEM表明铁酸盐粒子的形状被La公司替换影响。

简介：TheeffectofLaelementonthemechanicalpropertiesandconstitutionnearbygrainboundaryinaCo-basesuperalloyCo-22Ni-22Cr-14kduring760℃ageinghasbeeninvestigatedbyAESandmaterialtesting.ResultsshowthatelementLacanbeinastateofsolidsolutionandsegregatesmainlyatthevicinityofgrainboundaries.ThepriorsegregationofLaatomscanaffectsegregationbehaviourofotherelements,sothatexertsinfluenceonmicrostructureofthealloy,ParticularlyincreasingofLacontentcandecreasePconcentrationatthevicinityofgrainboundariesbutnotdecreaseSconcentration.StogetherwithLaproducecosegregationeffect.ThecontentofLahasnoobviouseffectonhightemperaturestrength.WhenthecontentofLacomesupto0.02wt-％,itcanobviouslyimprovethehightemperatureductility.

简介：Low-CoLa1.8Ti0.2MgNi8.9Co0.1alloyswerepreparedbymagneticlevitationmeltingfollowedbyannealingtreatment.TheeffectofannealingonthehydrogenstoragepropertiesofthealloyswasinvestigatedsystematicallybyX-raydiffraction（XRD）,pressure-compositionisotherm（PCI）,andelectrochemicalmeasurements.TheresultsshowthatallsamplescontainLaNi5andLaMg2Ni9phases.LaCo5phaseappearsat1,000℃.Theenthalpychangeofallhydridesiscloseto-30.6kJ·mol-1H2ofLaNi5compound.Annealingnotonlyincreaseshydrogencapacityandimprovescyclingstabilitybutalsodecreasesplateaupressureat800and900℃.Afterannealing,thecontractionofcellvolumeandtheincreaseofhydridestabilitycausethehighratedischargeabilitytoreduceslightly.Theoptimumalloyisfoundtobeoneannealedat900℃,withitshydrogencapacityreachingupto1.53wt%,anddischargecapacityremaining225.1mAh·g-1after140charge–dischargecycles.

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简介：作者在此文中将法语中的隐喻大致分为四种类型,然后探讨了各自的汉译方式,这四种类型是:①用“是”、“成”、“为”、“等于”等系词作比喻词的隐喻;②不用比喻词的隐喻,即注释型、呼语型和同位语型隐喻;③虚假定语型隐喻;④拟人或拟物型隐喻。

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简介：PolycrystallineNd3+andLa3+co-dopedyttriananopowderNd3+:Y1.90La0.10O3fortransparentceramicswassynthesizedbyco-precipitationmethodusingoxalateacidastheprecipitantand(NH4)2SO4astheelectricalstabilizerunderultrasonicradiation.Nanopowderscalcinedatdifferenttemperatureswerecharacterizedwiththermalgravimetric-differentialthermalanalysis(TG/DTA),X-raydiffraction(XRD),transmittingelectronmicroscopy(TEM),energydispersivespectrometry(EDS)andspectralanalysistechniques.Th...

简介：Thispaperreportsonthelongevityofglycerol-dry(CO2)reformingoverthelanthanum(La)promotedNi/Al2O3catalysts.TheXRDresultsshowedthattheNiparticlewaswell-dispersedinthepresenceofLapromoter.Inaddition,viatheNH3-TPDanalysis,itwasfoundthattheLapromoterhasreducedtheacidityofNicatalystwhichmayhaveexplainedthemitigationofcarbonlaydown.Itwasdeterminedthatthe3.0wt%La-promotedNi/Al2O3catalystpossessedthelargestBETspecificsurfaceareaof97m2g-1.Consequently,ityieldedthebestcatalyticlongevityperformancewithconversionattainedmorethan90%,evenafter72hofreactionduration.Significantly,itcanbeconfirmedthatthepresenceofCO2duringtheglyceroldryreformingwasessentialinreducingcarbondeposition,mostlikelyviagasificationpathway.Thishasensuredastabilityofcatalyticactivityforalongreactionperiod(72h).

简介：作为行为和处世的方式，礼仪存在于生活的各个层面。它在人类社会里有共性的一面，也因国家、文化的不同而各有所异。本文借鉴西方理论探讨礼仪在法国社会里的意义和作用。

简介：ThestructureandelectrochemicalcharacteristicsofLa0.7Mg0.3Ni2.875Co0.525Mn0.1-boroncompositewasstudiedsystematically.TheAB3typehydrogenstoragealloysLa0.7Mg0.3Ni2.875Co0.525Mn0.1weresuccessfullysynthesizedbymeansofinter-mediaalloyLa2Mg17.Thealloyswerecompositedwithboronatdifferentweightrate.FromtheXRDanalyses,eachalloyofthisseriesismainlycomposedof(La,Mg)Ni3phaseandtheLaNi5phase,andthephaseabundanceofeachphasevarieswiththeboronweightrate,moreover,aftercomposition,thecandcellvolumesof(La,Mg)Ni3phaseincrease,andtheLaNi5phasekeepthesame,whichindicatethattheboronmayenter(La,Mg)Ni3phase.Theelectrochemicalstudiesshowthatthemaximumdischargecapacityofthecompositesdecreases,butthecyclinglifeimproved.Andthehighratedischargeabilityandexchangeimpendencespectroscopy(EIS)oftheAB3alloysanditscompositewerealsostudied.

简介：Sincethe1980s,IhavetrampedthemountainsandriversofnearlyalltheTibetan-inhabitedareas.WhattouchesmedeeplyisthatwhereverIwent,Iwouldfindholymountains,holyriversandholylakes.Invisibledeitiescanbefoundeverywhereatanytime.Likeman,theyarehierarchical.Smallholymountainsservelargeholymountainsandperformdutiesforthem.Thefourlargestholymountainsare:MagyiabenriMountainintheeast,

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简介：香港创作单位sbya-la-la在平面设计，产品包装等媒体创作上享有盛名，单位中极具代表性的摄影师Wing，Shya操刀是装声国际，这次首度跟日本年青时装品牌A/T来个3-D交叉合作，由sbya-la-la负责款式和图案设计，Wing.Shya操九目录摄影，更邀请了日籍名模RilsOkazorri亲身演绎，在各方实力单位共同努力下，一只名叫Grabbitl的粉紫小兔诞生了。

简介：通过气雾化方法制备Al86Ni7Y4．5Co1La1.5（摩尔分数，％）合金粉末。首先，将粉末进行不同时间的球磨，然后在不同的烧结温度及保压时间等条件下对粉末分别进行热压烧结和放电等离子烧结。通过X射线衍射仪（XRD），扫描电镜（sEM）以及透射电镜（TEM）对粉末和块体材料的显微组织和形貌进行表征。结果表明：在特定球磨参数下球磨100h以上可以产生非晶，而且通过放电等离子烧结可以得到非晶／纳米晶块体材料，然而这种材料的相对密度较低。通过热压烧结可制备抗压强度为650MPa的Al86Ni7Y4．5Co1La1.5纳米块体材料。

简介：Afewhours'drivetookmetoaplacecalledBingzhongluo,thelargestpieceofflatlandinthecanyon,wheretheNujiangRivertakestwoabruptturns,formingthefirstbendontheNujiangRiver,whichisabestknownscenicspotinChina.Atthesideoftheriverthereisatabletofpurewhitemarbleinscribedwithwordspaintedinbrightred,reading:“Bingzhongluo,theShangri-La.”

简介：此文是对20世纪上半叶法国文化在中国的传播和接受过程的总体回顾。作者结合现代中国的特殊历史背景，着重论述了五四运动和《新青年》杂志、留法勤工俭学运动、中法大学等历史事件和相关人物对传播法国文化所起的作用，并介绍了这个时期法国思想和文学在中国的译介情况。

简介：ThestructureandelectrochemicalpropertiesofanewlowcobalthydrogenstorageelectrodealloysLa1-xLixNi3.2Co0.3Al0.3(0≤x≤0.2)wereinvestigatedwithadifferentadditionsofLiinreplacementofLa.WiththeincreaseofLicontentsthemaximumdischargecapacityincreasesfrom240mAh·g-1(x=0)to328.4mAh·g-1(x=0.1)andthecyclestabilityisimprovedcorrespondingly.ThecapacitydecaycanremaiN28.6%(x=0.2)after230charge/dischargecycles.Thehighratedischarge(HRD)abilityofthealloys(x≤0.1)isimprovedandthebestHRDis34.1%(x=0.1)underthedischargecurrentdensity1200mA·g-1.ItisfoundthatthepreparedalloysarebasicallycomposedofLaNi5asmatrixphaseandLaNi3assecondphase(x≤0.1).ButtheabundanceofLaNi3phasedramaticallydecreaseswithincreasingx.Whenx=0.2,anewphaseAl(NiCo)3isformed.

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