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简介：【摘要】在深圳卷烟厂，YJ112卷烟机已作为卷烟卷制环节的主力机型；该机型主要依靠平准器对烟支重量进行控制调节和紧固烟支端部烟丝。通过对YJ112卷烟机平准器主传动法兰部位的改进，采用主传动法兰表面喷涂陶瓷和主传动法兰内孔加装防油垫片等措施，有效减少了平准器漏油的次数；通过安装双重法兰和回油管，进一步降低了平准器漏油风险，加装回油管使得漏油更容易观察；通过实践证明，以上的设计改进是可行的。

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简介：从老年骨质疏松症发病情况入手,探讨维生素D治疗骨质疏松的作用机制、活性代谢产物种类以及活性维生素D监测的临床意义,有利于指导临床用药,使老年骨质疏松症患者做到个体化治疗。

简介：本文介绍经过抛物线y^2=2px（p〉0）上两点A（x1，y1）、B（x2，y2）的直线AB方程，并说明它在解题中的应用．

简介：TheEuropeanUnion(EU)isoneofthemainenergyconsumersandimportersintheworld.SafeguardingenergysecurityhasbecomethepriorityobjectiveininternalandexternalpoliciesoftheEU.Byimplementingitsdiversificationstrategyinenergysupply,theEUhasstrengtheneditsrivalryforenergyinCentralAsia.ChinaandtheEUfacesimilarenergysecurityproblem.AfterthelaunchingofthenaturalgaspipelinesinCentralAsia,thesourcesofgassupplyforChinaandtheEUbecomeintertwinedintheregion,makingtheircontentionfiercerthanever.ProperlyhandlingtheenergycompetitionandcooperationwiththeEUintheregionhasbecomeanimportantconcerninChina'senergysecuritystrategy.

简介：Luminescentpolystyrenemicrosphereswereeasilyfabricatedfrompoly(styrene-co-methacrylicacid)andaqueousRE(III)chloridesolution(RE=Eu,Tb)inthepresenceof2,20-bipyridineassecondligand.Thenegativechargesofcarboxylgroupsonthesurfaceofmicrospherescoordinatedwithrareearthionsatfirst,suchascomplexescovalentlylinkedto2,20-bipyridine,resultinginstrongphotoluminescence.Variousmethods,includingtransmissionelectronmicroscope(TEM),scanningelectronmicroscope(SEM),energydispersivespectroscopy(EDS),Fouriertransforminfraredspectroscopy(FT-IR),andfluorescencespectrophotometer,wereusedtocharacterizetheresultantpolystyrenecompositemicrospheres.Thisworkhighlightstheideathatitisfaciletosynthesisluminescentmicrospheresbysurface-modifiedmethoddirectly.

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简介：Objective:Tofabricatepolymericnanocompositeswithexcellentphotoluminescence,magneticproperties,andstabilityinaqueoussolutions,inordertoimprovespecificityandsensitivityofcellularimagingunderamagneticfield.Methods:FluoridatedLn3+-dopedHAP(Ln3+-HAP)NPsandironoxides(IOs)canbeencapsulatedwithbiocompatiblepolymersviaamodifiedsolventexaction/evaporationtechniquetopreparepolymericnanocompositeswithfluoridatedLn3+-HAP/ironoxide.Thenanocompositeswerecharacterizedforsurfacemorphology,fluorescencespectra,magneticpropertiesandinvitrocytotoxicity.MagnetictargetedcellularimagingofsuchnanocompositeswasalsoevaluatedwithconfocallaserscanningmicroscopeusingA549cellswithorwithoutmagneticfield.Results:Thefabricatednanocompositesshowedgoodstabilityandexcellentluminescentproperties,aswellaslowinvitrocytotoxicity,indicatingthatthenanocompositesaresuitableforbiologicalapplications.Nanocompositesundermagneticfieldachievedmuchhighercellularuptakeviaanenergy-dependentpathwaythanthosewithoutmagneticfield.Conclusion:Thenanocompositesfabricatedinthisstudywillbeapromisingtoolformagnetictargetedcellularimagingwithimprovedspecificityandenhancedselection.

简介：TheapplicationofLanthanumBromide(LaBr3)detectorsprovidesauniqueopportunitytomeasurelifetimeofexcitedstatesinpicosecond-nanosecondregion.Reducingthebackgroundisofcriticalimportancetogetpreciseresults.Forsomeexcitedstatesfeedingfromisomerswithlifetimelongerthan1μs,itcanbeachievedbytheSpectrometerforHeavyAtomandNuclearStructure(SHANS)[1].143Eunucleiwerepopulatedviathe123Sb(24Mg,4n)fusion-evaporationreaction.Mostoftheevaporationresiduesatgroundstateorlong-livedisomersweretransferredtodetectionterminalafteraflightofabout1.4μsinSHANS.Inthecaseof143Eu,threetransitionshavebeenobserved(Fig.1).

简介：采用粉末冶金方法制备含Y2O3的稀土钼合金,利用金相显微镜、扫描电子显微镜（SEM）、X射线衍射（XRD）、能谱分析（EDS）等手段对钼合金的断裂特征和组织结构进行对比分析,研究稀土氧化物Y2O3含量对钼合金组织和性能的影响。研究表明：添加Y2O3能细化晶粒、改善钼合金的晶粒均匀性和致密度、提高钼合金的性能;拉伸强度和屈服强度随Y2O3含量的增加呈现先增高后降低的趋势,在Y2O3含量为1%时,抗拉强度达511.43MPa,屈服强度456.99MPa,分别是纯钼材料的1.31倍和1.57倍,综合力学性能最佳;在烧结坯中,Y2O3颗粒分布均匀,主要以球形和等轴状形式存在于晶界上。

简介：随着社会的不断发展和进步，人们的生活水平不断提高，学生的营养状况得到了极大地改善，但随之而来的是身体素质的极度下降，为解决青少年健康的这一问题，国家提出了“亿万学生阳光体育运动”。本文提出了阳光体育活动“3x＋y＋z”模式，旨在为中小学阳光体育的顺利进行提供更好的参考价值。

简介：相等的隧道(ECAP)处理的尖紧迫和常规挤出(前)被用于Mg-12Gd-3Y-0.5Zr(wt%)镁合金以便在机械性质评估潜在的改进。ECAP实验在380污瀠潲散被进行吗？

简介：摘要：采用改进的密封装置制备了Fe(OH)3胶体，通过蒸汽和溶液中HCl的检验，证明了Fe(OH)3胶体制备过程中产生的HCl没有从溶液中挥发；向5支各盛1 mL胶体的试管中分别加入不同浓度盐酸、饱和NaCl溶液、蒸馏水的对比实验，证明加入的电解质溶液达到一定浓度时胶体才会聚沉。

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简介：CurrentChina-EUSecurityRelationsTherearetwolevelsofsecurityrelationsbetweenChinaandtheEU.ThefirstlevelisthatofChinaandtheEUasawhole.ThesecondlevelisthatbetweenChinaandmemberstatesoftheEUrespectively.

简介：Withthecomingofthenewcentury,theEuropeanUnion(EU)arrivesontheworldscenewithacompletenewlook.Atthebeginningoftheyear,theunionsignedtheNiceTreatyinresponsetotheneedsoffurtherintegrationandeast-

简介：StrivingforcloserbilateraltieshasdominatedEuropeanUnion’sChinapolicyadjustmentssincethemid-nineties.Fourmajordecisionsofstrategicsignifi-canceinthisregardweremadeinquicksuccessionfromJanuarytoAprilthisyear.FirstcametheconsensusinJanuarytoholdanEU-ChinaSummitinthemar-

简介：TheEU'sstrategyforRussiasincetheendofthecoldwarhastoalargeextentfailed,andthedirectconsequencesarethecurrentlydeadlockedEU-Russiarelationship.Therearethreereasonsforthis:theEUandRussia'srespectivestrengthandstatusrelativetoeachotherhavebeenchangingsincethebeginningofthiscentury;theEU'sstrategytowardsRussiahasbeenmorefragmentinginrecentlyyears;andtheAmericanfactor.TheEU-Russiarelationscouldcontinuetobeinpoorshapeintheyearstocome,anditisverylikelysometimesevenfurtherworsening.Butthetwosideswouldrefrainfromextrememeasuresandpreventtheirrelationsfromslidingintorealcoldwar.