BS 6390-1985 计算机图形编制程序的功能集.图形核心系统(GKS)规范
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【英文标准名称】:Specificationforasetoffunctionsforcomputergraphicsprogramming,theGraphicalKernelSystem(GKS)
【原文标准名称】:计算机图形编制程序的功能集.图形核心系统(GKS)规范
【标准号】:BS6390-1985
【标准状态】:作废
【国别】:英国
【发布日期】:1985-12-31
【实施或试行日期】:
【发布单位】:英国标准学会(BSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:计算机制图;图形显示器;字符串;计算机应用;句法;定义;语义学;图形核心系统;数据结构;误差;文件结构(计算机);计算机软件;算法;计算机终端;数据布置;坐标(数学);文档;接口;图形表示
【英文主题词】:
【摘要】:
【中国标准分类号】:L81
【国际标准分类号】:
【页数】:256P;A4
【正文语种】:英语
【英文标准名称】:Low-voltageswitchgearandcontrolgear-Part4-3:Contactorsandmotor-starters-ACsemiconductorcontrollersandcontactorsfornon-motorloads
【原文标准名称】:低压开关设备和控制设备.第4-3部分:电流接触器和电动机起动器非电动机负载用交流半导体控制器和电流接触器
【标准号】:IEC60947-4-3Edition1.1-2007
【标准状态】:现行
【国别】:国际
【发布日期】:2007-01-01
【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/SC17B
【标准类型】:()
【标准水平】:()
【中文主题词】:交流电压;接触器;控制装置;定义;电负载;电气工程;电磁兼容性;检验;低电压;低压电器;低压开关设备;电动机起动器;产品信息;特性;半导体连接器;半导体器件;规范(验收);开关设备;试验
【英文主题词】:Alternatingvoltages;Contactors;Controldevices;Definition;Definitions;Electricload;Electricalengineering;Electromagneticcompatibility;EMC;Inspection;Lowvoltage;Low-voltageequipment;Low-voltageswitchgear;Motorstarters;Productinformations;Properties;Semiconductorcontactors;Semiconductordevices;Specification(approval);Switchgear;Testing
【摘要】:ThispartofIEC60947appliestoa.c.semiconductornon-motorloadcontrollersandcontactorsintendedforperformingelectricaloperationsbychangingthestateofa.c.electriccircuitsbetweentheON-stateandtheOFF-state.Typicalapplicationsaregivenintable2.Ascontrollers,theymaybeusedtoreducetheamplitudeofther.m.s.a.c.voltageontheloadterminalsfromthatoftheappliedvoltage–eithercontinuouslyorforaspecifiedperiodoftime.Thehalf-waveperiodofthea.c.waveformremainsunchangedfromthatoftheappliedvoltage.Theymayincludeaseriesmechanicalswitchingdeviceandareintendedtobeconnectedtocircuits,theratedvoltageofwhichdoesnotexceed1000Va.c.Thisstandardcharacterizescontrollersandcontactorsforusewithorwithoutbypassswitchingdevices.Thesemiconductorcontrollersandcontactorsdealtwithinthisstandardarenotnormallyintendedtointerruptshort-circuitcurrents.Therefore,suitableshort-circuitprotection(see8.2.5)shouldformpartoftheinstallationbutnotnecessarilyofthecontrolleritself.Inthiscontext,thisstandardgivesrequirementsforsemiconductorcontrollersandcontactorsassociatedwithseparateshort-circuitprotectivedevices.Thisstandarddoesnotapplyto?operationofa.c.andd.c.motors;?low-voltagea.c.semiconductormotorcontrollersandstarterscoveredbyIEC60947-4-2;?electronica.c.powercontrollerscoveredbyIEC60146;?all-or-nothingsolid-staterelays.Contactorsandcontrol-circuitdevicesusedinsemiconductorcontrollersandcontactorsshouldcomplywiththerequirementsoftheirrelevantproductstandard.Wheremechanicalswitchingdevicesareused,theyshouldmeettherequirementsoftheirownIECproductstandardandtheadditionalrequirementsofthisstandard.
【中国标准分类号】:K31
【国际标准分类号】:29_130_20
【页数】:168P.;A4
【正文语种】:英语
【英文标准名称】:StandardGuideforFieldQualityAssuranceinaGround-waterSamplingEvent
【原文标准名称】:地下水取样中现场质量保证的标准指南
【标准号】:ASTMD7069-2004(2010)
【标准状态】:现行
【国别】:美国
【发布日期】:2004
【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】:D18.21
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:
【英文主题词】:ground-watersampling;qualityassurance;samplingandanalysisplan;Qualityassurance(QA);Sampling;Ground-watermonitoring/sampling
【摘要】:FieldQAdemonstratestheeffectivenessoffieldqualitycontrolprocedures.EffectiveQAfacilitatesthecollectionofstatisticallysignificantdatathatisdefendablescientificallyandinacourtoflaw.QAalsoinvolvestheuseofconsistentprocedures,increasingthevalidityofdatacomparisonamongsamplinglocationsandevents.Thisguideshouldbeusedbyaprofessionalortechnicianwhohastrainingorexperienceinground-watersampling.1.1Thisguidecoversthequalityassurance(QA)methodsthatmaybeusedtoassurethevalidityofdataobtainedduringthesamplingofaground-watermonitoringwell.QAisanyactiontakentoensurethatperformancerequirementsaremetbyfollowingstandardsandprocedures.FollowingQApracticesbecomesevenmorecriticalifthedatamustbevalidatedinacourtoflaw.Undercertainconditions,itmaybenecessarytofollowadditionalordifferentQApracticesfromthoselistedinthisguide.QApracticesshouldbebasedupondataqualityobjectives,site-specificconditions,andregulatoryrequirements.1.2ThisstandardaddressesQAproceduresusedinthefieldanddoesnotrefertolaboratoryQAprocedures1.3Thisstandardalsodoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesandtodeterminetheapplicabilityofregulatorylimitationspriortouse.1.4ThisstandardprovidesguidanceforselectingandperformingvariousfieldQAprocedures.Thisdocumentcannotreplaceeducationorexperienceandshouldbeusedinconjunctionwithprofessionaljudgement.Notalloftheproceduresareapplicableinallcircumstances.ThisASTMstandardisnotintendedtorepresentorreplacethestandardofcarebywhichtheadequacyofagivenprofessionalservicemustbejudged,norshouldthisdocumentbeappliedwithoutconsiderationofaprojectx2019;smanyuniqueaspects.Thewordx201C;standardx201D;inthetitleofthisdocumentmeansonlythatthedocumenthasbeenapprovedthroughtheASTMconsensusprocess.
【中国标准分类号】:Z16
【国际标准分类号】:13_060_45
【页数】:3P.;A4
【正文语种】:英语
