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BS EN 60512-23-4-2001 屏蔽和过滤试验.试验23d:传输线路时域反射

作者:标准资料网 时间:2024-05-14 18:21:35  浏览:9483   来源:标准资料网
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【英文标准名称】:Connectorsforelectronicequipment-Testsandmeasurements-Screeningandfilteringtests-Test23d-Transmissionlinereflectionsinthetimedomain
【原文标准名称】:屏蔽和过滤试验.试验23d:传输线路时域反射
【标准号】:BSEN60512-23-4-2001
【标准状态】:现行
【国别】:英国
【发布日期】:2001-09-24
【实施或试行日期】:2001-09-24
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:电学测量;电子设备及元件;电气元件;机电装置;性能试验;试验;电气试验;反射
【英文主题词】:Braidshieldings;Cleaningmaterials;Components;Connectors;Damping;Electricconnectors;Electricplugs;Electricalcomponents;Electricalengineering;Electricalimpedance;Electromechanicaldevices;Electronicengineering;Electronicequipment;Filtering;Interruptions;Measurement;Measuringtechniques;Qualityassurance;Reflectancemeasurement;Reflection;Reflectivematerials;Resistance;Runningtime;Screening;Testing;Timedomainreflectometry;Timeranges;Transmissionlines;Transmissionprocedures
【摘要】:ThispartofIEC60512definestwotestmethodsforevaluatingtheperformanceofaconnectorinatransmissionlinebymeasuringthereflectionsproducedbyitinthetimedomain.Inthesemethods,theconnectorundertestistreatedasadiscontinuityinatransmissionlinewithacontrolledcharacteristicimpedance.TestmethodAusesprecisioncoaxialandsemi-rigidcoaxialcablestoconnecttheconnectorundertestandthetestequipment.Thismethodissuitableformanyconnectororcableassemblygeometries.TestmethodBusesprecisiontestboards,precisioncoaxialcablesandsemi-rigidcoaxialcablestoconnecttheconnectorundertestandthetestequipment.Thismethodissuitableforprintedboardconnectors.
【中国标准分类号】:L10
【国际标准分类号】:
【页数】:18P;A4
【正文语种】:英语


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【英文标准名称】:StandardGuideforConductingaSensitivityAnalysisforaGround-WaterFlowModelApplication
【原文标准名称】:地下水流样品应用的灵敏度分析标准导则
【标准号】:ASTMD5611-1994(2002)
【标准状态】:现行
【国别】:
【发布日期】:1994
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:D18.21
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:计算机;校准;地下;土壤;导则;地下水;取样;水文地质系统;有关材料;灵敏度分析;水流样品应用;水样品
【英文主题词】:calibration;computer;groundwater;modeling;sensitivity;
【摘要】:Afteramodelhasbeencalibratedandusedtodrawconclusionsaboutaphysicalhydrogeologicsystem(forexample,estimatingthecapturezoneofaproposedextractionwell),asensitivityanalysiscanbeperformedtoidentifywhichmodelinputshavethemostimpactonthedegreeofcalibrationandontheconclusionsofthemodelinganalysis.Ifvariationsinsomemodelinputsresultininsignificantchangesinthedegreeofcalibrationbutcausesignificantlydifferentconclusions,thenthemerefactofhavingusedacalibratedmodeldoesnotmeanthattheconclusionsofthemodelingstudyarevalid.Thisguideisnotmeanttobeaninflexibledescriptionoftechniquesofperformingasensitivityanalysis;othertechniquesmaybeappliedasappropriateand,afterdueconsideration,someofthetechniqueshereinmaybeomitted,altered,orenhanced.1.1Thisguidecoverstechniquesthatshouldbeusedtoconductasensitivityanalysisforaground-waterflowmodel.Thesensitivityanalysisresultsinquantitativerelationshipsbetweenmodelresultsandtheinputhydraulicpropertiesorboundaryconditionsoftheaquifers.1.2Afteraground-waterflowmodelhasbeencalibrated,asensitivityanalysismaybeperformed.Examinationofthesensitivityofcalibrationresidualsandmodelconclusionstomodelinputsisamethodforassessingtheadequacyofthemodelwithrespecttoitsintendedfunction.1.3Afteramodelhasbeencalibrated,amodelermayvarythevalueofsomeaspectoftheconditionsapplyingsolelytothepredictionsimulationsinordertosatisfysomedesigncriteria.Forexample,thenumberandlocationsofproposedpumpingwellsmaybevariedinordertominimizetherequireddischarge.Insofarastheseaspectsarecontrollable,variationoftheseparametersispartofanoptimizationprocedure,and,forthepurposesofthisguide,wouldnotbeconsideredtobeasensitivityanalysis.Ontheotherhand,estimatesoffutureconditionsthatarenotcontrollable,suchastherechargeduringapostulateddroughtofunknowndurationandseverity,wouldbeconsideredascandidatesforasensitivityanalysis.1.4Thisguidepresentsthesimplestacceptabletechniquesforconductingasensitivityanalysis.Othertechniqueshavebeendevelopedbyresearchersandcouldbeusedinlieuofthetechniquesinthisguide.1.5Thisguideiswrittenforperformingsensitivityanalysesforground-waterflowmodels.However,thesetechniquescouldbeappliedtoothertypesofground-waterrelatedmodels,suchasanalyticalmodels,multi-phaseflowmodels,non-continuum(karstorfractureflow)models,ormasstransportmodels.1.6Thisguideisoneofaseriesonground-watermodelingcodes(software)andtheirapplications,suchasGuideD5447andGuideD5490.Otherstandardshavebeenpreparedonenvironmentalmodeling,suchasPracticeE978.1.7Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.TheSIunitsgiveninparenthesesareforinformationonly.1.8Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.1.9Thisguideoffersanorganizedcollectionofinformationoraseriesofoptionsanddoesnotrecommendaspecificcourseofaction.Thisdocumentcannotreplaceeducationorjudgement.Notallaspectsofthisguidemaybeapplicalbeinallcircumstances.ThisASTMstandardisnotintendedtorepresentorreplacethestandardofcarebywhichtheadequacyofagivenprofessionalservicemustbejudged,norshouldthisuniqueaspects.Theword"Standard"inthetitleofthisdocumentmeansonlythatthedocumenthasbeenapp......
【中国标准分类号】:P12
【国际标准分类号】:13_060_10
【页数】:5P.;A4
【正文语种】:


基本信息
标准名称:硅抛光片表面质量目测检验方法
中标分类: 冶金 >> 金属理化性能试验方法 >> 金属无损检验方法
替代情况:被GB/T 6624-1995代替
发布日期:1900-01-01
实施日期:1987-07-01
首发日期:1900-01-01
作废日期:1900-01-01
出版日期:1900-01-01
页数:3页
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所属分类: 冶金 金属理化性能试验方法 金属无损检验方法

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