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20 个结果
  • 简介:TheFinalBattleAgainstPovertyChinahasannouncedtotheworlditscommitmenttoeliminatingpovertybytheendofthecentury.Greatprogresshas...

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  • 简介:TheSaemangeumprojectincludeswell-developedtidalflats,twoestuariesoftheMankyeongandDongjinrivers,andachainofsmalliskandsintheouterareaoffthedikebyreclaimingasurfaceareaof40100ha.Alongseadikeof30kmhasbeenconstructedinthemid-westareaofKorea.ThispaperdescribestheconstructionoftidaldikesfocusingonthefinalclosureoperationperformedinApril,2006employingintermediatetechnology.Predictivemodellingwasalsocarriedouttopredictthereal-timeflowfieldsduringthegradualclosureoperationofthefinalstage.

  • 标签: 潮汐预报 关闭 大堤 堤防建设 预测模型
  • 简介:《最终的决定》(TheFinalDecision)选自美国著名的儿童文学作家弗吉尼亚·沃尔夫(VirginiaEuwerWlolff)的小说《莫扎特时节》(TheMozartSeason)的第一章。上篇选文讲述了主人公阿莱格拉(Allegra)在卡普兰老师(Kaplan)的指导下拉小提琴的水平有所提高,但是她对自己不太自信.不知道自己有没有实力参加比赛。本篇选文主要通过师生间的对话刻画出了主人公对是否参赛犹豫、矛盾、纠结的心理变化过程。最后,她做出了什么样的决定?又是什么原因促使她做出这样的决定呢?

  • 标签: 英语学习 学习方法 阅读知识 阅读材料
  • 简介:我们建议复杂性的一个新定义。定义看那一个系统什么时候经由一个短暂状态演变到一个最后的状态,它的复杂性两个都取决于许多最后的州、短暂的状态。许多短暂状态可以被对骚乱的反应的差异描述。我们希望这个定义能由证明所有简单系统有零复杂性描述在简单系统和复杂系统之间的一条清楚的边界,并且所有复杂系统有积极复杂性。复杂性计算的一些例子被举,它支持我们的希望。

  • 标签: 干扰作用 最后状态 测量方法 复杂性
  • 简介:Thehigh-powerlaserbeaminthefinalopticsassemblyofhigh-powerlaserfacilitiesisoftenmodulatedbycontaminationparticles,whichmaycauselocalhighlightintensity,therebyincreasingthefilamentarydamageprobabilityforopticalcomponents.Tostudythegeneraldesignbasisforafinalopticsassemblytodecreasetheriskoffilamentarydamage,different-sizedcontaminationparticlesdepositedonacomponentsurfacearesimulatedtomodulatea351-nmlaserbeambasedontheopticaltransmissiontheory,andthecorrespondingsimulationresultsareanalyzedstatisticallyintermsofthepropagationcharacteristicandthelightfieldintensitydistributionofthemodulatedlaserbeam.Thestatisticalresultsshowthatcomponentthicknessanddistancebetweencomponentscantosomeextentbeoptimizedtoreducetheappearanceoflocalhighlightintensity,andthegeneraldesignbasisofcomponentthicknessandarrangementaregivenfordifferentcontrollevelsofparticlesizes.Moreover,thestatisticalresultscanalsopredictthelaserbeamqualityapproximatelyundertheexistingopticsdesignandenvironmentalcleanliness.Theoptimizeddesignforfinalopticsassemblybasedonenvironmentalcleanlinesslevelisusefultoprolongthelifetimeofopticsandenhancetheoutputpowerofhigh-powerlaserfacilities.

  • 标签: 光学组件 设计基准 基础 高功率激光器 统计学分析 模拟调制
  • 简介:6月12日,苹果公司推出了FinalCutPro4软件,这是苹果获得艾美奖的电影、HD、SD和DV编辑软件的主要升级版本。FinalCutPro4具有300多种新功能,包括RTExtreme、LiveType、Soundtrack、Compressor和每通道32位浮点视频处理功能。FinalCutPro4还引入了三个全新的集成式应用——用于制作标题的LiveType、用于创作音乐的Soundtrack和用于全功能批量代码转换的Compressor。

  • 标签: FINAL CUT EXTREME 剪辑 苹果公司 编辑软件
  • 简介:GeologicalresearchontheMediterraneanregionispresentlycharacterizedbythetransitionfromdisciplinarytomultidisciplinaryresearch,aswellasfromnationaltointernationalinvestigations.Inordertosynthesizeandintegratethevastdisciplinaryandnationaldatasetswhichareavailable,itisnecessarytoimplementmaximuminteractionamonggeoscientistsofdifferentbackgrounds.Thecreationofproject-orientedtaskforcesinuniversitiesandotherresearchinstitutions,aswellasthedevelopmentoflargeinternationalcooperationprograms,isinstrumentalinpursuingsuchamultidisciplinaryandsupranationalapproach.TheTRANSMEDAtlas,anofficialpublicationofthe32ndInternationalGeologicalCongress(Florence2004),istheresultofaninternationalscientificcooperationprogramwhichbroughttogetherforovertwoyearssixtythreestructuralgeologists,geophysicists,marinegeologists,petrologists,sedimentologists,stratigraphers,paleogeographers,andpetroleumgeologistscomingfromeighteencountries,andworkingforthepetroleumindustry,academia,andotherinstitutions,bothpublicandprivate.TheTRANSMEDAtlasprovidesanupdated,synthetic,andcoherentportrayaloftheoverallgeological-geophysicalstructureoftheMediterraneandomainandthesurroundingareas.TheinitialstimulusfortheAtlascamefromtherealizationoftheextremelyheterogeneousnatureoftheexistinggeological-geophysicaldataaboutsuchdomain.Thesedatahavebeengatheredbyuniversities,oilcompanies,geologicalsurveysandotherinstitutionsinseveralcountries,oftenusingdifferentproceduresandstandards.Inaddition,muchofthesedataarewritteninlanguagesandpublishedinoutletsthatarenotreadilyaccessibletothegeneralinternationalreader.Bysynthesizingandintegratingawealthofpreexistingandnewdataderivedfromsurficialgeology,seismicsectionsatvariousscales,andmantletomographies,theTRANSMEDAtlasprovidesforthefirsttimeacoherentgeologicaloverv

  • 标签: 地质构造 地中海 地球物理学 海洋沉降
  • 简介:TheShenguang-IIUpgrade(SG-IIUp)facilityisanunder-constructionhigh-powerlaserdriverwitheightbeams,24kJenergy,3nspulsedurationandultravioletlaseroutput,intheShanghaiInstituteofOpticsandFineMechanics,China.Theprototypedesignandexperimentalresearchoftheprototypefinalopticsassembly(FOA),whichisoneofthemostimportantpartsoftheSG-IIUpfacility,havebeencompletedontheninthbeamoftheSG-IIfacility.Thirty-threeshotswerefiredusing1-ωenergyfrom1000to4500Jand3-ωenergyfrom500to2403Jwitha3nssquarepulse.Duringtheexperiments,emphasiswasgiventotheprocessofopticaldamageandtotheeffectsofclean-gascontrol.AnumericalmodeloftheFOAgeneratedbytheIntegratedComputerEngineeringandManufacturingcodeforComputationalFluidDynamics(ICEMCFD)demonstratedthatafluxwithin1–5ls-1anda180speriodiseffectualtoavoidcontaminantsputteringtotheoptics.Thepresenceofsurface‘mooning’damageandsurfacespotslocatedoutsidetheclearapertureareinducedbycontaminantssuchaswire,silicagelandmillimeterorderfiberandmetal.

  • 标签: FINAL OPTICS ASSEMBLY optical damage SG-II-Up
  • 简介:IGCP421—""""""""NorthGondwanamid-Palaeozoicbioevent/biogeographypatternsinrelationtocrustaldynamics""""""""—wasdirectedtowardsanalysisofbioevents(especiallyglobalextinctionsandrecoveries),majorvariationinbiodiversity,andchangeinbiogeographicdifferentiationalongtheNorthGondwanacontinentalmarginduringthemid-Palaeozoic.Incidentaltothiswasintegrationofthesedatawiththebiofacies/lithofaciesdatabasefortheregioninpursuitofincreasedprecisioninstratigraphicalignmentsandimprovedpalaeogeographicandpalaeoclimatologicsyntheses.

  • 标签: 地壳动力学 冈瓦纳大陆 古生代 生物地理
  • 简介:Thispaperisconcernedwithanoptimalcontrolproblemofanablation-transpirationcoolingcontrolsystemwithStefan-Signoriniboundarycondition.Asthecontinuationoftheauthors'previouspaper,theDubovitsRii-MilyutinfunctionalapproachisagainadoptedininvestigationofthePontryagin'smaximunprincipleofthesystem.Thenecessaryoptimalityconditionispresentedfortheproblemwithfreefinalhorizonandphaseconstraints.

  • 标签: 消融蒸发冷却处理 Stefan-Signorini边界条件 优化控制 最大原则 相位约束
  • 简介:掺杂物在在协议的sintering期间定制微观结构起一个关键作用。这些掺杂物可以在体积以内形成稳固的答案,或分离到谷物边界(GB)和稳固蒸汽的接口(免费表面),引起管理质量的一种不同精力充沛的情形的各个在densification和谷物生长期间搬运。在这个工作,控制掺杂物分发的力量,特别地在表面和GB的并发的分离的可能性,基于分离的各自的热含量被讨论。一个方程基于系统的最小的吉布斯精力被导出从试验性的接口精力数据决定分离的热含量,并且当氧化钇的接口energetics上的掺杂物在它sintering的最后的阶段期间稳定了氧化锆,结果适用描绘La的角色。La实质地减少,这被显示出GB和表面精力(不同地)当sintering进行,动态地在这个阶段影响它的驱动力,和作为结果的谷物生长和densification。

  • 标签: 氧化钇稳定氧化锆 烧结过程 表面能量 掺杂剂 偏析 晶界
  • 简介:在我们讨论基于含碳二叠的stratigraphic的领域调查预定Paleo亚洲的海洋的最后的闭合的这份报纸,在东南的内部蒙古的序列和沉积环境与它的附近的区域的地质学结合了。研究显示出那在期间在Tianshan-HingganOrogenic系统的东方片断含碳二叠,有对大陆人沿岸浅海的巨大的ENE-NE-trending沉积的盆,通过东南的内部蒙古向东从Ejinqi在西方开始进吉林和Heilongjiang。分发更低在广阔区域含碳是稀少的。晚含碳或二叠的暴烈沉积的岩石unconformably总是躺泥盆纪以上单位。上面含碳中间二叠被沿岸浅海的存款统治并且上面二叠,由大陆人存款。晚含碳二叠没有subduction碰撞造山运动的踪迹,逐渐地暗示盆由缩小和shallowing消失了。另外,是笔记感兴趣Ondor和和Hegenshanophioliticm戠獩畣瑩Τ

  • 标签: 含碳二叠 stratigraphic 序列 东南的内部蒙古 Paleo 亚洲的海洋
  • 简介:AbstractBackground:The COVID-19 novel coronavirus is contagious, and the mortality is higher in the elderly population. Lockdown in different parts of the world has been imposed since January 2020. Chronic subdural haematoma (cSDH) has a unique natural history in which symptoms can be non-specific, and the onset is insidious. This study aims to evaluate the impact of the COVID-19 pandemic on the presentation of cSDH.Methods:Consecutive adult cSDH patients admitted from 1 March 2020 to 30 April 2020 were reviewed. Exclusion criteria including those who had no definite history of head injury or the diagnosis of cSDH were made from a scheduled follow-up scan. Corresponding data during the same period in 2019 were reviewed for comparison. The primary outcome was the interval between the initial head injury and the final radiological diagnosis of cSDH. Secondary outcomes include Markwalder chronic subdural haematoma grade upon admission, length of stay in the acute hospital, and the modified Rankin scale (mRS) upon discharge.Results:For the primary outcome, the average interval between head injury and the diagnosis of cSDH was significantly longer at 56.6 days (49 to 74 days, SD 9.83 days) during the period from March to April 2020, versus 29.4 days (17 to 42 days, SD 8.59 days) in 2019 for the corresponding period (p = 0.00703). There was no significant difference in the functional outcome upon discharge.Conclusions:cSDH patients can present late during the COVID-19 lockdown period. The functional outcome was comparable when operations for drainage were timely performed.

  • 标签: Chronic subdural haematoma Novel coronavirus COVID-19 Head injury
  • 简介:摘要:阅读理解教学是培养学生综合语言运用能力的重要环节。本文通过深入探讨思维品质的理论框架,并结合具体的教学案例,详细分析了如何在阅读理解教学中有效培养学生的逻辑性、批判性和创造性等思维品质。文章提出了运用思维导图、问题链设计和情境探究等教学手段,以提升学生的阅读理解能力和思维品质,进而促进其全面发展。

  • 标签: 阅读理解 思维品质 教学案例 思维导图 问题链设计
  • 简介:In1997,IGCPProjectNo.410wasestablishedtoappraiseknownrecordsofOrdovicianbiotas,inordertoevaluateoneofthegreatest-everdiversificationsoflifeonEarth,between489and443millionyearsago.Datacollectionandanalysisofbiodiversitywerecoordinatedthroughsevenregionalteams,andaglobal“clade”team.

  • 标签: 奥陶纪 生物多样化 物种大爆发 古生物化石