ASTM D 4923-2001 增强热固性塑料杆的标准规范
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【英文标准名称】:StandardSpecificationforReinforcedThermosettingPlasticPoles
【原文标准名称】:增强热固性塑料杆的标准规范
【标准号】:ASTMD4923-2001
【标准状态】:现行
【国别】:美国
【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(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:玻璃纤维增强塑料;照明系统;杆(柱)
【英文主题词】:Glass-fibrereinforcedplastics;Lightingsystems;Masts
【摘要】:
【中国标准分类号】:G33
【国际标准分类号】:83_120
【页数】:10P;A4
【正文语种】:英语
【英文标准名称】:Lightconveyorbelts-Principalcharacteristicsandapplications
【原文标准名称】:轻型传送带.主要特性和应用
【标准号】:BSEN873-1997
【标准状态】:作废
【国别】:英国
【发布日期】:1997-05-15
【实施或试行日期】:1997-05-15
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:输送带;物料装卸;抗拉强度;尺寸;负荷;载荷支撑部件;物料搬运设备零部件;轻型;层覆材料
【英文主题词】:
【摘要】:Alsoincludesexamplesofthetypesofmachinerythatincorporatemachinebelts.
【中国标准分类号】:J81
【国际标准分类号】:53_040_20
【页数】:10P;A4
【正文语种】:英语
【英文标准名称】:Reliabilityoffibreopticinterconnectingdevicesandpassiveopticalcomponents-Part4:Productscreening
【原文标准名称】:纤维光学互连器件和无源光学元件可靠性第4部分:产品筛选
【标准号】:IEC62005-4-1999
【标准状态】:现行
【国别】:国际
【发布日期】:1999-08
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/SC86B
【标准类型】:()
【标准水平】:()
【中文主题词】:连接工艺;方法;玻璃纤维电缆;测量技术;电插头;组件;紧固件;元部件;分类;可靠度;试验;玻璃纤维;阻尼(波);产品试验;阻尼容量;插接件连接;证实;调节;调节;光波导;单模纤维
【英文主题词】:Adjustment;Adjustments;Classifications;Components;Connectiontechnology;Connectoredjoints;Damping;Dampingcapacity;Electricplugs;Fasteners;Fibreoptics;Glassfibrecables;Glassfibres;Measuringtechniques;Methods;Monomodefibres;Opticalwaveguides;Producttests;Reliability;Testing;Validation
【摘要】:ThisInternationalStandarddescribesproductscreening.Aproperproductscreenisactuallyaprocess,notatest.Asaprocess,itismaintainedandconstantlyvalidatedtoensureitachievesthepurposeforwhichitwasdefined.Thisprocessisappliedtoaproductinordertoinduceproductswithaknownfailuremechanism,tofailinacontrolledsituationbeforetheproductisdeployedinthefield.Ifthisprocessisproperlyapplied,thenallinfantmortalityfailuresinthefield,associatedwiththefailuremechanism(s)forthescreen,willbeeliminated.Figure1showstheclassical"bathtub"three-regioncurveoffailureratesformostproducts.Althoughthefailureratesofpassiveopticalcomponentshavenotbeenconclusivelyshowntofollowthiscurve,itisusefulforillustrativepurposes.Screeningisknownforsomeproductsasaproofstressorinthecaseofelectronics,asa"burn-inprocess".Whenappliedtoaproduct,itwillnormallyaffectthefailurerateappliedduringtheinfantmortalityportionoftheproductlifecycle.Ifthescreenisproperlychosen,itwillinduceaportionoftheinfantmortalityfailurescausedbythechosenfailuremechanism(s)tooccurinthemanufacturingcycle,earlierthanwouldnormallybeseenintheunscreenedpopulationshowninthedashedline.Also,itshouldbenotedthataproperlyappliedscreendoesnotweakenordegradethewear-outorendoflifeperformanceofaproductpopulation.Inanycase,thescreenshouldalsonotaffectthemiddleregionofnormallifeutilization.Screeningandthedecisiontoapplyascreentoaproductprocessshouldneverbearequirement.Itshouldbedesignatedasanoptionoranalternative.Onceproducttestingidentifiesafailuremechanisminapopulationorsub-populationofaproduct,screeningtoremovethatmechanismisonlyonealternative.Equallyvalid,andinmostcasespreferable,isthealternativetomakedesignormanufacturingprocessimprovementstoeliminatethemechanism.Obviously,anychangestotheproductarethenrevalidated,andthescreenisrevalidatedaswell.However,thedecisiontochoosewhethertoscreenorimprovetheproductshouldbebasedoneconomics,customerexpectations,andproductuse.
【中国标准分类号】:L23
【国际标准分类号】:33_180_20
【页数】:9P.;A4
【正文语种】:英语
