【英文标准名称】:ElectromagneticcompatibilityandRadiospectrumMatters(ERM)-Wirelessmicrophonesinthe25MHzto3GHzfrequencyrange-Part1:Technicalcharacteristicsandmethodsofmeasurement(EndorsementoftheEnglishversionEN300422-1V1.4.2(2011-08)as
【原文标准名称】:电磁兼容性及无线电频谱事项(ERM).频率范围在25MHz到3GHz之间的无线麦克风.第1部分:技术特性和测量方法(英文版本EN300422-1V1.4.2(2011-08)的核准本作为
【标准号】:EN300422-1-.4.2
【标准状态】:现行
【国别】:
【发布日期】:2011-11
【实施或试行日期】:
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Electricalengineering;Electromagneticcompatibility;EMC;Frequencyranges;Measurement;Measuringtechniques;Microphones;Mobileradiosystems;Properties;Radioengineering;Radioequipment;Ratings;Telecommunication;Telecommunications;Wireless
【摘要】:
【中国标准分类号】:L06
【国际标准分类号】:33_160_50
【页数】:2P;A4
【正文语种】:英语


【英文标准名称】:StandardTestMethodsforOne-DimensionalSwellorSettlementPotentialofCohesiveSoils
【原文标准名称】:粘性土的单维膨胀或沉降趋势的标准试验方法
【标准号】:ASTMD4546-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D18.05
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:collapse;compression;expansivesoil;freeswell;heave;hydrocompression;laboratorytests;settlement;swell;swellpressure;Cohesivesoils;Heave;Loadingtests--soil/relatedmaterials;One-dimensionalswell/settlementpotential;Pressuretesting--so
【摘要】:Thesoilswell/collapsestrainsmeasuredfromthesetestmethodscanbeusedtodevelopestimatesofheaveorsettlementforaconfinedsoilprofilesubjecttoone-dimensionalheaveorsettlement,orstress-inducedsettlementfollowingwetting-inducedheave/settlement.Theycanalsobeusedtoestimatethepressurethatwouldbenecessarytopreventswelling.Selectionoftestmethod,loading,andinundationsequencesshould,ascloselyaspossible,simulatefieldconditionsbecauserelativelysmallvariationsinunitweightandwatercontent,orsequenceofloadingandwettingcansignificantlyalterthetestresults.(See6.1.8andRefs(1-5).)Note28212;Notwithstandingthestatementonprecisionandbiascontainedinthisstandard:Theprecisionofthistestmethodisdependentonthecompetenceofthepersonnelperformingthetestandthesuitabilityoftheequipmentandfacilitiesused.AgencieswhichmeetthecriteriaofPracticeD3740aregenerallyconsideredcapableofcompetentandobjectivetesting.UsersofthistestmethodarecautionedthatcompliancewithPracticeD3740doesnotinitselfassurereliabletesting.Reliabletestingdependsonseveralfactors;PracticeD3740providesameansofevaluatingsomeofthesefactors.1.1Thesetestmethodscoverthreealternativelaboratorymethodsformeasuringfreeswell,swellpressure,andthemagnitudeofone-dimensionalswellorcollapseofcompactedorintactcohesivesoils.Note18212;RefertoSections4,5,6and13.8todeterminethebestmethodforaparticularapplication.1.2Thetestmethodscanbeusedtomeasurethemagnitudeofone-dimensionalwetting-inducedswellorcollapse(hydrocompression)underdifferentvertical(axial)pressures,aswellasthemagnitudeofswellpressureandthemagnitudeoffreeswell.Itcanalsobeusedtoobtaindataforstress-inducedcompressionfollowingwetting-inducedswellorcollapse.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesstatedininch-poundunitsareapproximate.1.4AllmeasuredandcalculatedvaluesshallconformtotheguidelinesforsignificantdigitsandroundingestablishedinPracticeD6026.1.4.1Themethodusedtospecifyhowdataarecollected,calculated,orrecordedinthisstandardisnotdirectlyrelatedtotheaccuracytowhichthedatacanbeappliedindesignorotheruses.Howoneappliestheresultsobtainedusingthisstandardisbeyonditsscope.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:P13
【国际标准分类号】:93_020
【页数】:9P.;A4
【正文语种】:英语