学科分类
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302 个结果
AIR
  • 简介:第四章解疑涂桦为了验证高冷轩的真实身份,上专业网站查询到验证AIR的方法:至今为止,AIR还无法使用有强辐射的东西,因为使用强辐射的东西时他们会爆炸。

  • 标签: 中学生 作文 语文学习 课外阅读
  • 简介:Dropshaftsareverticalstructureswidelyusedinurbandrainagesystemsandbuildingsforwatertransportation.Inthispaper,aphysicalmodelstudywasconductedtoinvestigatetheairentrainmentinthedropshaftundervariousflowregimeswithandwithoutairventilation.Observedfromtheexperiments,theairentrainmentmechanismsvariedwiththewaterflowregimesinthedropshaft.Whentherewasnowaterplugformedinthedropshaft,aircouldbesupplieddirectlyfromdownstream.Oncethewaterplugwasformed,whilewithoutventing,theairwasreplenishedonlyfromdownstreamintermittentlyandthenintheformoflargeairbubbletravelingupwardstotheairspaceatthetop;whilewithventing,airwasmainlyreplenishedfromthedropshafttopandnolargeairbubblewasobserved.Theexperimentalresultsalsoshowedthattheamountofentrainedairinthedropshaftwithventingwasgreaterthanthatwithoutventing.

  • 标签: AIR ENTRAINMENT AIR supply BUBBLE Flow
  • 简介:<正>球鞋配置前后分离式ZOOMAIR,中底碳板撑托,鞋身轻量化,全内靴,完全是顶级配置中的顶级了。脚踝保护性9分,外踝底内踝高,既减轻了重量和阻碍,又保证了脚踝的安全。减震性9.8分,zoom!还是zoom,即使使用的是较薄的气垫,仍然给人很踏实的感觉。包裹舒适度9.5分,看似空间较窄,但实际上还是可以的,并没有夹脚的感觉,和12成鲜明对比。

  • 标签: 减震性 中底 AIR JORDAN XIV 公愉
  • 简介:<正>AirJordanⅩⅢ代表了乔丹篮球生涯的巅峰,巅峰的意义就是所有乔丹迷的一个美妙的记忆,但是我们也不得不说在这以后,乔丹和公牛队最辉煌的历史画上了一个句号。就算这个句号是非常完美的,但是让人感觉还是非常的遗憾。第六届总冠军的庆功宴上,全体公牛队总共签了六双鞋来代(?)总冠军,其中五双相继

  • 标签: 公牛队 总冠军 AIR JORDAN JORDAN
  • 简介:WENXiangcaiisonthestaffofChinaNationalEnvironmentalMonitoringCenter.Herjobiscollectingandaggregatingdata,whichisgreatforher-she’sascientist.ButinrecentyearsWenfeelslikeshe’sturnedintosomethingofamediapersonality.Sheisaskedquestionsonavarietyoftopicswhensheattendsconferences,andsheisofteninterviewedbyjournalistsforherexpertopinion.AsenvironmentalconsciousnesshasgrowninChinaoverthepastfewyears,moreandmorepeoplewanttoknow

  • 标签: 空气污染 警报 环境监测中心 工作人员 科学家
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  • 简介:Opticalemissionspectroscopy(OES)wasappliedforplasmacharacterizationduringtheerosionofasphaltenesubstrates.Anamountof100mgofasphaltenewascarefullyappliedtoanelectrodeandexposedtoair-plasmaglowdischargeatapressureof1.0Torr.Theplasmawasgeneratedinastainlesssteeldischargechamberbyanacgeneratoratafrequencyof60Hz,outputpowerof50Wandagasflowrateof1.8L/min.Theelectrontemperatureandiondensitywereestimatedtobe2.15±0.11eVand(1.24±0.05)×1016m-3,respectively,usingadoubleLangmuirprobe.OESwasemployedtoobservetheemissionfromtheasphalteneexposedtoairplasma.BothmolecularbandemissionfromN2,N+2,OH,CH,NH,O2aswellasCN,andatomiclightemissionfromVandHγwereobservedandusedtomonitortheevolutionofasphalteneerosion.Theasphalteneerosionwasanalyzedwiththeaidofascanningelectronmicroscope(SEM)equippedwithanenergydispersiveX-ray(EDX)detector.TheEDXanalysisshowedthatthetimeevolutionofelementsC,O,SandVweresimilar;andthechemicalcompositionoftheexposedasphaltenesremainedconstant.Particlesizeevolutionwasmeasured,showingamaximumsizeof2307μmafter60min.Thisbehaviorismostlikelyrelatedtoparticleagglomerationasafunctionoftime.

  • 标签: 空气等离子 发射光谱仪 沥青基材 侵蚀过程 离子反应 表面分析
  • 简介:WhathappenedtoChina'sinsurancesectorthisyear?Aboveall,thisyearwasthefirstinthenewFive-YearPlanfortheStandardizationofChina'sInsur-ance(2007-2011).TheFive-YearPlan,releasedbackinFebruary,setsthefirststandardsfortheinsuranceindustry

  • 标签: 经济状态 中国 保险行业 项目投资
  • 简介:Airpressureistheforceexertedonyoubytheweightoftinyparticlesofair(airmolecules).Althoughairmoleculesareinvisible,theystillhaveweightandtakeupspace.Sincethere’salotof"empty"spacebetweenairmolecules,aircanbecompressedtofitinasmallervolume.

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  • 简介:ThispaperisfocusedonthemodelidentificationofaMicroAirVehicle(MAV)instraightsteadyflightcondition.Theidentificationisbasedoninput-outputdatacollectedfromflighttestsusingbothfrequencyandtimedomaintechniques.Thevehicleisanin-house40cmwingspanairplane.Becauseofthecomplexcoupled,multivariableandnonlineardynamicsoftheaircraft,linearSISOstructuresforboththelateralandlongitudinalmodelsaroundareferencestatewerederived.TheaimoftheidentificationistoprovidemodelsthatcanbeusedinfuturedevelopmentofcontroltechniquesfortheMAV.

  • 标签: 系统识别技术 飞行试验 飞行器 模型识别
  • 作者: Haidong Kan
  • 学科: 医药卫生 >
  • 创建时间:2022-12-13
  • 出处:《中华医学杂志(英文版)》 2022年第05期
  • 机构:School of Public Health, Key Lab of Public Health Safety of the Ministry of Education and NHC Key Lab of Health Technology Assessment, Fudan University, Shanghai 200032, China Children’s Hospital of Fudan University, National Center for Children’s Health, Shanghai 200032, Chi
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