学科分类
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457 个结果
  • 简介:Tenfull-scalesteelbeam-to-columnmomentconnectionsusedinmoment-resistingframes(MRFs)weretestedtostudythefailureprocess,failuremode,strengthandplasticrotationcapacity.Thespecimensincludeonetraditionalweldedflange-boltedwebconnection,onetraditionalfullyweldedconnection,fourbeamflangestrengthenedconnections,threebeamflangeweakenedconnections,andonethrough-diaphragmconnection.ThetestresultsshowthattheconnectionswithflangecoverplatesorwithpartlycutbeamflangessatisfythebeamplasticrotationdemandforductileMRFs.Fromthemeasuredstressprofilesalongthebeamflangeandbeamwebdepth,themechanicsofbrittlefractureattheendofthebeamisdiscussed.Designrecommendationsforsteelbeam-to-columnmomentconnectionsareproposed.

  • 标签: 钢结构 延性 刚度 地震 抗震结构
  • 简介:Aseriesofshake-tabletestswasconductedbyinsertingandreplacing4differenttypesofdampers,orbyremovingtheminafull-scale5-storysteelframebuilding.Theobjectiveistovalidateresponse-controltechnologiesthatareincreasinglyadoptedformajorJapanesebuildingswithoutbeingattestedto-datebyamajorearthquake.Testresultsarebrieflydescribed,andgoodperformanceofthedampersandframedemonstrated.Theconceptsofthefull-scalebuildingtestsandvariouscontributionsarediscussed.Thedifficultyassociatedwithfull-scaledynamictestingisexplained.

  • 标签: response-controlled building STEEL frame STEEL DAMPER
  • 简介:Twolargeexplosiontrials(5000kgTNTand500kgANFO)wereconductedinWoomera,AustraliainApril/May2006.AdvanceProtectiveTechnologiesforEngineeringStructures(APTES)grouptested2largesingle-storeyconcretemoduleswithindividualcomponentssuchasdoors,windowsandtiledpanels.Adescriptionofthetrialanddetailsofvariousmodulestestedinthesetrialsarepresentedinthepaper.Numericalmodellingandsimulationsareperformedusingcomputerprograms,CONWEP,AIR3DandAUTODYN.Acomparisonofthepressuretimehistoriesobtainedusingthesecodesismadealongwiththeconcludingremarks.

  • 标签: 爆破试验 混凝土模块 爆炸压力 模型 保护技术 模拟试验
  • 简介:地震照明在表面下的成像起一个重要作用。一幅更好的图象也能通过优化获得几何学或介绍包含照明赔偿的更先进的地震移植或tomographic倒置方法被期望。垂直电报调查是为它的灵活性和数据质量的传统的海洋的地震调查的潜在的代替。处理的常规垂直电缆线数据在移植前要求primaries和multiples的分离。我们建议使用多尺度的完整的波形倒置(FWI)改进垂直电报调查的照明范围。一个深水速度模型被造在在海床下面检测低速度异例测试多尺度的FWI的能力。合成结果证明多尺度的FWI是在深海的探索的一个有效模型大楼工具。通过面向的照明分析和多尺度的FWI可以帮助减轻垂直电报调查的风险的目标的几何学优化。多尺度的FWI,低频率的数据和multi-vertical-cable获得系统的联合可以提供高分辨率和高保真度表面下的模型。

  • 标签: 垂直电缆 反演方法 波形反演 多尺度 海上地震勘探 海洋
  • 简介:聆听光碟,把你听到的英文字母涂掉,用剩下的字母组成一句句子,让它告诉你这男孩该怎样做。

  • 标签: 小学 英语 课外阅读 阅读材料
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  • 简介:时隔两年再度回到大家视线的申敏儿,对于新作《阿娘使道传》有着满满期待和勃勃野心。对于首次触电古装剧,她也觉得虽辛苦但有趣。

  • 标签: 音乐 歌手 个人专辑 单曲
  • 简介:时隔一年,KARA带着四辑《FullBloom》华丽归来,不论是英伦风的帅气英姿还是华公主装的华贵装扮,她们用五人五色全面绽放属于KARA的舞台。

  • 标签: 音乐 歌手 个人专辑 单曲
  • 简介:迈克尔绝非等闲之辈.他总是那么乐观,总能看到事物积极的一面。在工作中,假如有人问他“你最近好吗?”.他就会说:“太好了.简直没的说。”

  • 标签: 高中 英语 课外阅读 阅读材料
  • 简介:Theaimofthisstudyistodevelopdatacollectiontoolsforevaluationofschoolpracticecoursesandforperceptionsofteachercandidatesregardingteachercompetenciesforeffectiveteaching.Threehundredandeighty-eightlastyearundergraduatestudentsfromsevenprogramsoffacultiesofeducationattwostateuniversitiesparticipatedinthestudy.Itemsofthe5-pointLikertscalewerewrittenaccordingtothedimensionsoftheconstructswithrespecttotherelatedliterature.Theitemswerereviewedbythreeexperts,oneofwhomisintheeducationalmeasurementandtwoofwhomareinthescienceandbiologyeducationdepartments.Dimensionalitiesofthetwo-dimensionalEvaluationofPracticumScale(EPS)andone-dimensionalCompetencyofInstructionQualityScale(CIQS)wereanalyzedusingfactoranalysis.UnweightedleastsquaresestimationmethodandPromaxrotationwereusedinthefactoranalysisprocedures.Cronbach'sacoefficientswere0.89and0.83forthetwodimensionsofEPSand0.82forCIQS.

  • 标签: teaching quality TEACHER education intemship classes
  • 简介:JointlysponsoredbytheChineseMinistryofEnergyandtheCanadianFederalDepartmentofIndustry,ScienceandTechnology,Sino-CanadianseminarsonhydropowertechnologywereheldinsuccessioninBeijing,ChengduandKunmingbetweenNovember18-27.Morethan200expertsat-tendedtheseminarsrespectively.Inthecourseofeachseminarheld,ChineseparticipantsreviewedwithinterestCanadianprac-ticesandsomeoftheuniquetechnologiesdevelopedintappingtheirhydropotentialsoveryearswhileinthemeantimeChinesecounterpartsalsohighlightedthehistoric,currentandfuturepro-grammeforhydropowerdevelopmentinChina.AsindicatedinhisopeningspeechbyMr.LuYoumei,ViceMinisterofEnergy,

  • 标签: SEMINAR Minister Canadian gramme Chengdu SUCCESSION
  • 简介:HaveyoueverheardofAgathaChristie,anexcellentwriter?AgathaChristieis,withoutadoubt,themostfamousmystery1intheworld.Herbookshavebeentranslatedintomorethan100languages.All77novelsandstorycollectionsshewrotearestillonthemarket25yearsafterher2.AgathaChristiewasbornin1890inasouthwestEnglandseasidetown.She3averycomfortablechildhoodinabighousewithplentyofservants(仆人).Agathawasknown4animaginativechild.Withhersisterandbrotherawayatschool,sheoftenplayedalone.Shepassedthetimeby5upstorieswhichshetoldtoherself.

  • 标签: UNIT 12 LIFE IS full of