学科分类
/ 6
117 个结果
  • 简介:

  • 标签:
  • 简介:Rainbow是个神奇的自然现象,它的出现总是给人惊喜和愉悦,所以RainbowBridge将是一个传递惊喜和欢乐的桥梁。通过RainbowBridge,你可以把你的祝福送到每个角落。你的父母、你的老师、你的朋友将在这里接收到你对他们的关心和帮助。

  • 标签: 小学 英语学习 学习方法 阅读
  • 简介:Rainbow是个神奇的自然现象,它的出现总是给人惊喜和愉悦,所以RainbowBridge将是一个传递惊喜和欢乐的桥梁。

  • 标签: 小学 英语 课外阅读 阅读材料
  • 简介:THESEoldZhuangminorityfarmers'houseshavethreestories-pigs,hensandotherfarmanimalsarekeptonthefirstfloor,familymembersliveonthesecondandgrainandcornarestoredonthethird.'It'saprettysmartdesignbecauseit

  • 标签: 中国 农业信息化 信息技术 农业经济
  • 简介:ThereisariverflowinginfrontofBainamVillageinDeqengTownofDarzeCounty.Becauseschools,infirmaries,supplyandmarketingcooperativesandmostofthefarmlandareallontheothersideoftheriver,anyonewhowantedaccesshadtoundertakeaninconvenient12-kindetour.Mattersbecameevenworseintherainyseason,whenthewaterlevelrose.

  • 标签: 达孜县 桥梁 奉献精神 退休教师 人格精神
  • 简介:Thelogicalderivativesofp-adiccopy-shiftandshift-copygeneralizedBridgefunctionsaregiveninthispaper.Whenpequals2,theyareexactlythelogicalderivativesofnaturalorderingcopy-shiftandcopy-shiftBridgefunctions.

  • 标签: 矿气 生产
  • 简介:Thispapersummarizesthedesignequationsforlocalscourdeptharoundbridgeabutmentsasproposedbydifferentinvestigators,andalsothedifferentfactors,affectingthescourdepth.Methodsfortheestimationoflocalscourdepthbasedondimensionalanalysisarealsopresented.Thedesignmethodsbasedonempiricalrelationssuchasflowdepth,flowintensity,sedimentcharacteristics,abutmentsshapeandsize,alignment,andapproachchannelgeometryarealsodiscussed.Sinceclear-waterscouristhemaximumscourdepth,theequationforclear-waterscourisrecommendedforthecomputationoflocalscourdeptharoundbridgeabutmentsforuniformlyandnon-uniformlygradedsediments.

  • 标签: Local scour Bridge abutments FLOOD plain
  • 简介:Anintegratedcouplingelementconsideringwheel-railinterfaceforanalyzingthedynamicresponsesofvehicle-rail-bridgeinteractionsystemwithanon-uniformcontinuousbridgeispresented.Thegoverningequationsoftheinteractionsystemareestablishedfirst,andthesolutionprocedureandassemblymethodofthecouplingelementaredemonstrated.Finally,theaccuracy,efficiencyandfunctionoftheintegratedcouplingelementaretestedusingtwonumericalexamples.Theinfluencesofdifferentcombinationsofrailandbridgeelementlengthinthecouplingelementonthesolutionareinvestigated,andtheeffectsofdifferentrailirregularitiesonthedynamicresponsesarediscussed.

  • 标签: 耦合单元 统集成 非均匀 连续梁桥 元件 相互作用系统
  • 简介:Tosystematicallystudythevehicle–bridgecoupleddynamicresponseanditschangerulewithdifferentparameters,avehiclemodelwithsevendegreesoffreedomwasbuiltandthetotalpotentialenergyofvehiclespacevibrationsystemwasdeduced.Consideringthestimulationofroadroughness,thedynamicresponseequationofvehicle–bridgecoupledsystemwasestablishedinaccordancewiththeelasticsystemprincipleoftotalpotentialenergywithstationaryvalueandthe‘‘set-in-right-position''rule.Onthebasisoftheself-compiledFortranprogramandbridgeengineering,thedynamicresponseoflongspancontinuousgirderbridgeundervehicleloadwasstudied.Thisstudyalsoincludedthecalculationofvehicleimpactcoefficient,evaluationofvibrationcomfort,andanalysisofdynamicresponseparameters.Resultsshowtheimpactcoefficientchangeswithlanenumberandislargerthanthevaluecalculatedbythe‘‘generalcodefordesignofhighwaybridgesandculverts(China)''.TheDieckmannindexofbridgevibrationisalsorelatedtolanenumber,andthevibrationcomfortevaluationisgoodinnormalconditions.Therelevantconclusionsfromparametricanalyseshavepracticalsignificancetodynamicdesignanddailyoperationoflong-spancontinuousgirderbridgesinexpressways.Safetyandcomfortareexpectedtoimprovesignificantlywithfurthercontrolofthevibrationofvehicle–bridgesystem.

  • 标签: 大跨度连续梁桥 耦合系统 动力响应 数值分析 FORTRAN程序 舒适性评价
  • 简介:Mr.KanYi'sbookScouringatBridgeCrossings,basedonalargeamountoffieldsurveydata,fieldinvestigationdataandlaboratorytestdata,hasbeenpublishedbyChinaRailwayPublishingHouseonAugust2004inBeijing.Itisamonographicwritingonscouringatbridgecrossings.

  • 标签: 冲刷作用 桥墩 设计思路 预防方法 洪水计算
  • 简介:与空隙的牛顿的液体由一座钟摆运动的液体桥连接的一双中央动人的球形的粒子经常在微粒结合过程被遇到。在这篇论文,由假定完成式湿的状况,静态的液体桥牌上的液体体积和分离距离的效果被分析,并且在破裂精力之间的关系和液体桥体积也被学习。这些点将具有在与粘合剂粒子有关的工业过程的意义。

  • 标签: 液体电桥 微粒 化学分析 实验
  • 简介:<正>NanjingNO.2YangtzeRiverBridgewasanationalkeyconstructionprojectduringtheNinthFive-YearPlanperiod(1995-2000).Itislocated11kilometresupstreamfromthefirstYangtze

  • 标签: YANGTZE NANJING UPSTREAM Hangzhou AHEAD smoothly
  • 简介:为在用部分纠缠的州的资源的一个量通讯系统的信息转移的传统的方法是量蒸馏或直接远距传物。以便减少在hop-by-hop传播花费并且在每个节点独立地执行的等待的时间,我们建议从来源节点与部分纠缠的状态衔接方法到teleport量状态到目的地节点的量。我们也证明衔接电路的设计的特定的量为越过多重中间的节点的部分纠缠的状态远距传物是可行的。比作二个传统的方法,我们的部分,纠纷量衔接方法使用更简单的逻辑门,更好的安全,和罐头处于更少的量资源状况被使用了。

  • 标签: 量子隐形传态 纠缠态 隐形传输 桥接方法 资源状况 逻辑门电路