基本信息
| 标准名称： | 半导体直接直流变流器 |
| 英文名称： | Semiconductor direct d.c. convertors |
| 中标分类： |
电工 >>
输变电设备 >>
电力半导体期间、部件 |
| ICS分类： |
电气工程 >>
整流器、转换器、稳压电源
|
| 替代情况： | 被GB/T 3859.4-2004代替 |
| 发布日期： | 1987-04-15 |
| 实施日期： | 1999-05-01 |
| 首发日期： | 1987-04-15 |
| 作废日期： | 2005-02-01 |
| 起草单位： | 西安整流器研究所 |
| 出版日期： | 1900-01-01 |
| 页数： | 0 |
适用范围
本标准适用于各类半导体直接直流变流器（直流斩波器），即不带交流环节的直流一直流变流器。本标准不适用于某些特殊用途的直接直流变流器（例如牵引用变流器），这类变流器可另订标准或制订附加技术条件。与其他一般变流器相同的问题，可遵循GB 3859《半导体电力变流器》的有关规定。
前言
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目录
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引用标准
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所属分类： 电工 输变电设备 电力半导体期间 部件 电气工程 整流器 转换器 稳压电源
【英文标准名称】:StandardTestMethodforDeterminingShort-TermCompressionBehaviorofGeosynthetics
【原文标准名称】:土工合成织物短期压缩处理测定的标准试验方法
【标准号】:ASTMD6364-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【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】:D35.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:复合材料;压缩;变形;标记;塑料;试验方法
【英文主题词】:compression;deformation;geocomposite;indextest;yieldpoint
【摘要】:Thecompressionbehaviortestforgeosyntheticsisintendedtobeanindextest.Itisanticipatedthattheresultsofthecompressionbehaviortestwillbeusedtoevaluateproduct.Theresultsoftheanalysesmayalsobeusedtocomparetherelativecompressiveyieldpointsofmaterialsthatexhibitadetectablecompressiveyieldpoint.Itisanticipatedthatthistestwillbeusedforqualitycontroltestingtoevaluateuniformityandconsistencywithinalotorbetweenlotswheresamplegeometryfactors(forexample,thickness)ormaterialsmayhavechanged.Note18212;Thisisaone-dimensionaltestforcompressiveloadingofageosynthetic(s)inoneplane.5.1.1Thecompressiveyieldpointofgeosyntheticsmaybeevaluatedfromthestress/strainrelationship.Manymaterialsexhibitcompressivedeformationbutmaynotshowadistinctcompressiveyieldpoint.Thistestmethodcanbeusedtoevaluatetheshort-termstress/strainbehaviorofgeosyntheticsundercompressivestresswhileloadedataconstantrateofdeformation.Thistestmethodmaybeusedforacceptancetestingofcommercialshipmentsofgeosyntheticsbutcautionisadvisedbecauseinterlabtestingisincomplete.5.3.1Inthecaseofadisputearisingfromdifferencesinreportedtestresultswhenusingthistestmethodforacceptancetestingofcommercialshipments,thepurchaserandthesuppliershouldconductcomparativeteststodetermineifthereisstatisticalbiasbetweentheirlaboratories.Competentstatisticalassistanceisrecommendedfortheinvestigationofbias.Asaminimum,twopartiesshouldtakeagroupoftestspecimensfrommaterialshippedtotheproject.Thetestspecimensshouldthenberandomlyassignedinequalnumberstoeachlaboratoryfortesting.TheaverageresultsfromthetwolaboratoriesshouldbecomparedusingtheStudentrsquo;t-testforunpaireddataandanacceptableprobabilitylevelchosenbythetwopartiesbeforethetestingisbegun.Ifbiasisfound,eitheritscausemustbefoundandcorrectedorthepurchaserandsuppliermustagreetointerpretfuturetestresultsinthelightoftheknownbias.1.1Thistestmethodcoverstheproceduresforevaluationofthedeformationsofageosyntheticorcombinationofgeosynthetics(thatis,geocomposite(excludinggeotextiles,geomembranes,andgeosyntheticclayliners))undershort-termcompressiveloading.Thistestmethodisstrictlyanindextestmethodtobeusedtoverifythecompressivestrengthconsistencyofagivenmanufacturedgeosynthetic(s).Resultsfromthistestmethodshouldnotbeconsideredasanindicationofactualorlong-termperformanceofthegeosynthetic(s)infieldapplications.1.2Sincethesegeosyntheticsmayexperiencemuti-directionalcompressiveloadingsinthefield,thistestmethodwillnotshowactualfieldperformanceandshouldnotbeusedforthisspecificobjective.Theevaluatoroftheresultsshouldalsorecognizethatthedeterminationoftheshort-termsingleplanecompressivebehaviorofgeosyntheticsdoesnotreflecttheinstalledperformanceofsyntheticdrainagesystemsand,therefore,shouldnotbeusedastheonlymethodofproductspecificationorperformancewithrespecttosyntheticdrainagesystems.Thisstandarddoesnotpurporttoaddressallthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatehealthandsafetypracticesandtodeterminetheapplicabilityofregulatorylimitationspriortouse.1.3ThevaluesinSIunitsaretoberegardedasthestandard.Valuesininch-poundunitsareprovidedinparenthesesforinformation.
【中国标准分类号】:W59
【国际标准分类号】:83_140_99
【页数】:6P.;A4
【正文语种】: