【英文标准名称】:Informationtechnology-80mm(1,46Gbytesperside)and120mm(4,70Gbytesperside)DVDre-recordabledisk(DVD-RW)
【原文标准名称】:信息技术.80mm(每面1.46Gbytes)和120mm(每面4.7Gbytes)DVD可再记录盘(DVD-RW)
【标准号】:ISO/IEC17342-2004
【标准状态】:现行
【国别】:国际
【发布日期】:2004-07
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/IECJTC1/SC23
【标准类型】:()
【标准水平】:()
【中文主题词】:光盘;DVD;读-/写记忆;试验;RAM;定义;数据处理;尺寸;信息技术;数据介质;软盘;数据存储;磁道格式
【英文主题词】:Datamedia;Dataprocessing;Datastorage;Definitions;Dimensions;DVD;Flexibledisks;Informationtechnology;Opticaldisks;RAM;Read-/writememories;Testing;Trackformats
【摘要】:ThisInternationalStandardspecifiesthemechanical,physicalandopticalcharacteristicsofan80mmanda120mmDVDRe-recordabledisktoenabletheinterchangeofsuchdisks.Itspecifiesthequalityoftheprerecorded,unrecordedandtherecordedsignals,theformatofthedata,theformatoftheinformationzone,theformatoftheunrecordedzone,andtherecordingmethod,therebyallowingforinformationinterchangebymeansofsuchdisks.ThisdiskisidentifiedasaDVDRe-recordable(DVD-RW)disk.ThisInternationalStandardspecifies?80mmand120mmnominaldiameterdisksthatmaybeeithersingleordoublesided,?theconditionsforconformance,?theenvironmentsinwhichthediskistobeoperatedandstored,?themechanicalandphysicalcharacteristicsofthedisk,soastoprovidemechanicalinterchangebetweendataprocessingsystems,?theformatofthepre-recordedinformationonanunrecordeddisk,includingthephysicaldispositionofthetracksandsectors,theerrorcorrectingcodesandthecodingmethodused,?theformatofthedataandtherecordedinformationonthedisk,includingthephysicaldispositionofthetracksandsectors,theerrorcorrectingcodesandthecodingmethodused,?thecharacteristicsofthesignalsfrompre-recordedandunrecordedareasonthedisk,enablingdataprocessingsystemstoreadthepre-recordedinformationandtowritetothedisks,?thecharacteristicsofthesignalsrecordedonthedisk,enablingdataprocessingsystemstoreadthedatafromthedisk.ThisInternationalStandardprovidesforinterchangeofdisksbetweendiskdrives.Togetherwithastandardforvolumeandfilestructure,itprovidesforfulldatainterchangebetweendataprocessingsystems.
【中国标准分类号】:L64
【国际标准分类号】:35_220_30
【页数】:148P;A4
【正文语种】:英语


【英文标准名称】:Equipmentreliabilitytesting-Part6:Testsforthevalidityandestimationoftheconstantfailurerateandconstantfailureintensity
【原文标准名称】:设备可靠性测试.第6部分:恒定失效率和恒定失效密度的有效性和评估试验
【标准号】:IEC60605-6-2007
【标准状态】:现行
【国别】:国际
【发布日期】:2007-05
【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/TC56
【标准类型】:()
【标准水平】:()
【中文主题词】:分析;数据;缺陷;电器;电气工程;电驱动装置;设备;评估;失效;失效率;图解法;指导手册;假设;寿命周期;可维护性;维修;数值法;概率计算;可靠度;可靠度测试;表示法;样本大小;规范(验收);统计方法分析;统计测试;统计学;失效统计学;测试;有效性;验证
【英文主题词】:Analysis;Data;Defects;Electricappliances;Electricalengineering;Electrically-operateddevices;Equipment;Evaluations;Failure;Failurerates;Graphicalmethods;Guidebooks;Hypothesis;Lifecycles;Maintainability;Maintenance;Numericalmethods;Probabilitycalculations;Reliability;Reliabilitytesting;Representations;Samplesize;Specification(approval);Statisticalmethodsofanalysis;Statisticaltesting;Statistics;Statisticsoffailure;Testing;Validity;Verification
【摘要】:Thisstandardspecifiesprocedurestoverifytheassumptionofaconstantfailurerateorconstantfailureintensity,asdefinedinIEC60050(191),andtoidentifypatternsinthefailurerateorintensity.Theseproceduresareapplicablewheneveritisnecessarytoverifysuchassumptions.Thismaybeduetoarequirementorforthepurposeofassessinganyvariationwithtimeofthefailurerateorfailureintensity.Theobjectivesofthemethodsspecifiedinthisstandardareasfollows:–totestwhetherthetimestofailureofnon-repaireditemsareexponentiallydistributed,i.e.thefailurerateisconstant;–totestwhetherthetimesbetweenfailuresofrepaireditem(s)haveanytimetrend,i.e.thefailureintensitydoesnotexhibitanincreasingordecreasingtrend;–toconstructgraphsthatallowthepatternsinthefailurerateorfailureintensitytobedisplayed,withaviewtoverifyingwhethertheycanbeassumedconstant,toestimatetheirvaluesortoidentifythenatureofanydeparturefromconstancy.
【中国标准分类号】:K04
【国际标准分类号】:03_120_10;19_020;29_020
【页数】:88P;A4
【正文语种】:英语