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【英文标准名称】:Securities-Internationalsecuritiesidentificationnumberingsystem(ISIN);TechnicalCorrigendum1
【原文标准名称】:证券.国际证券鉴别标志编号系统(ISIN).技术勘误表1
【标准号】:ISO6166TechnicalCorrigendum1-1997
【标准状态】:作废
【国别】:国际
【发布日期】:1997-12
【实施或试行日期】:
【发布单位】:国际标准化组织(ISO)
【起草单位】:ISO/TC68
【标准类型】:()
【标准水平】:()
【中文主题词】:安全;识别方法;编号;银行业务;识别号;国际识别号
【英文主题词】:identificationnumbers;identificationmethod;internationalidentificationnumbers;numbering;safety;bankoperations
【摘要】:
【中国标准分类号】:A11
【国际标准分类号】:03_060
【页数】:1P;A4
【正文语种】:英语


【英文标准名称】:StandardTestMethodforMeasuringRelativeComplexPermittivityandRelativeMagneticPermeabilityofSolidMaterialsatMicrowaveFrequencies
【原文标准名称】:微波频率下固体材料相对复介电常数和磁导率测量标准试验方法
【标准号】:ASTMD5568-2001
【标准状态】:现行
【国别】:
【发布日期】:2001
【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】:D09.12
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:电容率;回转磁的
【英文主题词】:coaxialline;dielectricconstant;magneticpermeability;measurement;microwave;millimetre-wave;permittivity;radiofrequency;rectangularwaveguide;scatteringparameter;transmission/reflection
【摘要】:DesigncalculationsforRadioFrequency(RF),microwaveandmillimeter-wavecomponentsrequiretheknowledgeofvaluesofcomplexpermittivityandpermeabilityatoperatingfrequencies.Thistestmethodisusefulforevaluatingbatchtypeorcontinuousproductionofmaterialforuseinelectromagneticapplications.Itmaybeusedtodeterminecomplexpermittivityonlyorbothcomplexpermittivityandpermeabilitysimultaneously.1.1Thistestmethodcoversaprocedurefordeterminingrelativecomplexpermittivity(relativedielectricconstantandlossindex)andrelativemagneticpermeabilityofisotropic,reciprocal(nongyromagnetic)solidmaterials.Ifthematerialisnonmagnetic,thisproceduremaybeusedtomeasurepermittivityonly.1.2Thismeasurementmethodisvalidoverafrequencyrangeofapproximately1MHzto50GHz.Theselimitsarenotexactanddependonthesizeofthespecimen,thesizeandtypeoftransmissionlineusedasaspecimenholder,andontheapplicablefrequencyrangeofthenetworkanalyzerusedtomakemeasurements.Thelowerfrequencyislimitedbythesmallestmeasurablephaseshiftthroughaspecimen,andtheupperfrequencylimitisdeterminedbytheexcitationofhigher-ordermodesthatinvalidatesthedominant-modetransmissionlinemodel.Anynumberofdiscretemeasurementfrequenciesmaybeselectedinthisfrequencyrange.Toachievemaximummeasurementaccuracy,useofdifferenttransmissionlinesizesandtypesmayberequired.Forexample,useofa7-mmdiametercoaxialgeometrycanprovideformeasurementsfrom1MHzto18GHz.However,airgapsthatexistbetweenthespecimenandthetransmissionline'sconductorsintroduceerrorsthatmaynecessitatetheuseofalargerdiametercoaxialtransmissionlineandaseriesofrectangularwaveguidesofdifferentsizetocoverthisfrequencyrange.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:A42
【国际标准分类号】:17_220_01
【页数】:15P.;A4
【正文语种】: