简介：Atunableandswitchabledual-wavelengtherbium-dopedfiberlaser(EDFL)basedonall-fibersingle-modetaperedfiberstructurehasbeendemonstrated.Byadjustingthevariableopticalattenuator(VOA),thelasercanbeswitchedbetweenthesingle-wavelengthmodeandthedual-wavelengthmode.Whenthetemperatureappliedonthetaperedfiberstructurevaries,thepass-bandvariesandthewavelengthoftheoutputlasershiftscorrespondingly.Whenthetemperaturechangesfrom30°Cto180°C,thecentralwavelengthoftheEDFLgeneratedbybranchAshiftsfrom1550.7nmto1560.3nm,whilethatofbranchBshiftsfrom1530.8nmto1540.4nm,indicatingthewavelengthintervalistunable.Theseadvantagesenablethislasertobeapotentialcandidateforhigh-capacitywavelengthdivisionmultiplexingsystemsandmechanicalsensors.

简介：Alookattheongoing'5pointsin1line'coastlinedevelopmentprojectinLiaoning,NortheastChinaLIAONINGProvinceinNortheastChinawasoncethecountry'sindustrialengine.WithinadecadeofNewChina'sfounding,itwaschurningouteverythingfromcoalandsteeltofighterjets.Buttheenginesplutteredoutinthemid-1990s,whenmanyofLiaoning'sstate-owned

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简介：Dropmealine是一个非常地道的口语。在没有电话，没有email的时代，它最初表示“有什么消息简单写几个字寄过来吧”。如今，通讯发达。大家都用手机sendmessage，email，fax等等，很少用写信这种“古老方式”，但这个说法却一直沿用至今。衍生义为“记得要和我联系啊”!

简介：对线线的描述拓扑的关系尽管许多努力被做了，仍然是一个未解决的问题。这个问题涉及象空间质问，空间分析和制图综合那样的许多实际应用。开发一条健全、有效的途径描述线线关系，它是第一必要排队定义一个个人的拓扑学，即，本地拓扑学。连接的度的概念在一根线的几何结构被用于拓扑的差别的鉴定。一根线的一般拓扑的定义被给，即，端点集合和内部点设定。这个定义能被用于不同尺寸的嵌入的空格，合作尺寸是否等于或比零大。在这个基础上，打电话给4intersection-and-difference的一个通用模型为对基本线线的描述被建立拓扑的关系，一张概念的邻居图与拓扑的距离的考虑在之上被造。建议模型能在/R~1和/R~2代表在线片断之间的拓扑的变化，和基本关系的性质，这被结束。

简介：ItisacommonpracticeinChinatouseaninsulatedsilkjacklad-derinthelive-lineworktoenterthe500kVEHVelectricfield.WuhanHighVoltageResearchInstitutehassuccessfullycarriedoutsuchoperatingperformanceatthemeetingofESMO-90inCanada.(Fig.1)Theoperatingprocedureisnowrecommendedasfollows.

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简介：Anapplicationoflinesimplificationconsideringspatialknowledgeisdescribed.Amethodforidentifyingpotentialconflictregions,inordertoavoidtheselfintersectionofgeneralizedlines,isalsodiscussed.Furthermore,anewprogressivelinesimplificationalgorithmispresented.Fromtheviewpointofspatialcognition,aspatialhierarchicalstructureisproposed,anditsapplicationtoconstructionofspatialknowledgerelatedtoalineisexplained.

简介：GansuRareEarthCorporationisoneofthelargestrareearthproducersinChina.Itsannualpro-ductioncapacityofrareearthchloridehasreached18000tonREObytheendof1992,rankingthefirstinChinaandbeingthesecondintheworld(onlynexttoMolycorp.,USA).Thecorporation’soriginalannualcapacityofrareearthchloridewas12000tonREO.Inmeeting

简介：SNDisasphericalnon-magneticdetectoroperatingsince1996atVEPP-2Melectron-positroncolliderinNovosibirsk,SNDisperforminganupgradeofitssubsystems,electronics,andsoftwareforthenextrunatVEPP-2000,PresentFortran-basedofflineprogramswillbereplacedwiththeobject-orientedframework,whichsupportssimulation,reconstructionandanalysisactivities,Newframeworkexploitstheexperienceobtainedintheworkwiththecurrentofflineandsupportsorextendsitsessentialfeatures.Themainframeworkconceptisamodule,whichisabasicprocessingunitconsumingsomedataandproducingnewdata.Everymodulecanbeparameterizedduringruntime.Formalizeddescriptionofthemodulesisusedbytheframeworksequencerfortheselectionandorderingofminimalsubsetofmodulesforanygiventask.Datapersistencyservicesaremadesufficientlyabstracttoallowimplementationfordifferentpersistencytechnologies.Prsentlythereisanimplementationforthesequentialfileswithpackeddata.Theframeworkprovidesaninterfaceforscriptinglanguages.Togetherwithacustomexpressionparserthisgivesasupportforextensiblerun-timehistogramming.ThefunctionalprototypeoftheframeworkwasimplementedinPythonlanguageandprovedtheconceptsoftheproject.CurrentlythisprototypeisbeingreimplementedinC++.

简介：在有限领域上的排列代码被介绍，为自我双的排列代码的存在或不存在的一些条件被获得。

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简介：AbstractBismuth-containing quadruple therapy (BQT) has long been recommended for Helicobacter pylori (H. pylori) eradication in China. Meanwhile, in the latest national consensus in China, dual therapy (DT) comprising an acid suppressor and amoxicillin has also been recommended. In recent years, the eradication rate of H. pylori has reached >90% using DT, which has been used not only as a first-line treatment but also as a rescue treatment. Compared with BQT, DT has great potential for H. pylori eradication; however, it has some limitations. This review summarizes the development of DT and its application in H. pylori eradication. The H. pylori eradication rates of DT were comparable to or even higher than those of BQT or standard triple therapy, especially in the first-line treatment. The incidence of adverse events associated with DT was lower than that with other therapies. Furthermore, there were no significant differences in the effects of dual and quadruple therapies on gastrointestinal microecology. In the short term, H. pylori eradication causes certain fluctuations in the gastrointestinal microbiota; however, in the long term, the gastrointestinal microbiota eventually returns to its normal state. In the penicillin-naïve population, patients receiving DT have a high eradiation rate, better compliance, lower incidence of adverse reactions, and lower primary and secondary resistance to amoxicillin. These findings suggest the safety, efficacy, and potential of DT for H. pylori eradication.

简介：Thedualrandommodelsaboutthelifeinsuranceandsocialpensioninsurancehavereceivedconsiderableattentionintherecentarticlesonactuarialtheoryandapplications.Thispaperdiscussesageneralkindofincreasingannuitybasedonitsforceofinterestaccumulationfunctionasageneralrandomprocess.Thedualrandommodelofthepresentvalueofthebenefitsoftheincreasingannuityhasbeenset,andtheirmomentshavebeencalculatedundercertainconditions.

简介：Inthispaper,thedualmixedmethodforanunilateralproblem,whichisthesimplifiedmodellingofscalarfunctionforthefriction-freecontactproblem,isconsidered.Thedualmixedproblemisintroduced,theexistenceanduniqenessofthesolutionoftheproblemarepresented,anderrorboundsO(h^3/4)andO(h^3/2)areobtainedforthedualmixedfiniteelementapproximationsofRaviart-Thomaselementsfork=0andk=1respectively.

简介：Duetothegoodperformanceoftrackinglowelevationtargetascomparedtomicrowaveandthesuperiorityinpenetratingsmoke,dust,fog,anddrysnowascomparedtoinfrared,aKuandKadualbandexperimentalradarwasdesignedanddeveloped.ThisKuandKadualbandexperimentalradarisanarnplitute-comparisonmonopulsetrackingandguidingradar.Theconstitutionandparametersofthisradarisdescribedinparagraph2.Paragraph3dealswithtwoexperimentsfortestingthetrackingperformancesagainstlowelevationtarget,andgivestheimportantresults.BothKuandKabandhavehightrackingprecisionwhentheytrackhighelevationtargets,whileKabandhasmuchbettertrackingperformancethanKubandwhentheytracklowelevationtargets.Kabandcantrackahelicopter,whoseradarcrosssectionisabout6squaremeters,at40m,20m,10m,andeven5mabovesea.Kubandcanonlytrackthesamehelicopterat160mandhigherabovesea.

简介：Thispapergivesanewdualproblemfornondifferentiableconvexprogrammingandprovesthepropertiesofweakdualityandstrongdualityandoffersanecessaryandsufficientconditionofstrongduality.

简介：Thepurposeofthispaperistopresentsomedualpropertiesofdualcomodule.Itturnsoutthatdualcomodulehasuniversalproperty(cf.Theorem2).Since(()*,()°)isanadjointpair(cf.Theorem3),somenicepropertiesoffunctor()°areobtained.FinelyTheoram4providesthatthecotensorproductisthedualofthetensorproductby(MAN)°≌M°□A.N°.Moreover,theresultHomA(M,N)≌Coma.(N°,M°)isprovedforfiterelatedmodulesM,NoverarefiexivealgebraA.