ASTM A 717/A 717M-2006 单片样品表面绝缘电阻率的标准试验方法

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【英文标准名称】:Railwayapplications-Track-Testmethodsforfasteningsystems-Determinationoftorsionalresistance
【原文标准名称】:铁路设施.轨道.紧固系统的试验方法.抗扭曲阻力的测定
【标准号】:BSEN13146-2-2002
【标准状态】:作废
【国别】:英国
【发布日期】:2002-11-28
【实施或试行日期】:2002-11-28
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:轨枕;固定件;扭转试验;电容性负载;铁路设施;铁路建造;轨道紧固系统;轨道(物料装卸设备);铁路设备;紧固件;定义;试验;铁路;实验室试验
【英文主题词】:Capacitiveloads;Definition;Definitions;Fasteners;Fixings;Laboratorytesting;Permanency;Permanentways;Qualityrequirements;Railfasteningsystems;Railwayapplications;Railwayconstruction;Railwayinstallations;Railways;Sleepers;Testing;Torsion;Torsiontest;Torsiontesting;Torsiontests;Torsionalstrength;Torsionaltest;Tracks(materialshandlingequipment);Travelways
【摘要】:ThisPartofthisEuropeanStandardspecifiesalaboratorytestproceduretodeterminethemomentnecessarytorotatearail,securedtoasleeperbyarailfasteningassembly,through1°inaplaneparalleltothebaseofthesleeper.Thevalueobtainedcanbeusedintrackstabilitycalculations.Thistestprocedureappliestoacompletefasteningassembly.
【中国标准分类号】:S11
【国际标准分类号】:93_100
【页数】:12P;A4
【正文语种】:英语


【英文标准名称】:Industrialcommunicationnetworks—Fieldbusspecifications—Part3-17:Data-linklayerservicedefinition—Type17elements
【原文标准名称】:工业通信网络.现场总线规范.数据链路层服务定义.17型元件
【标准号】:BSEN61158-3-17-2008
【标准状态】:现行
【国别】:英国
【发布日期】:2009-01-31
【实施或试行日期】:2009-01-31
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:总线系统;总线;电路网络;通信;控制设备;控制系统;控制工艺学;数据通信;数据链层;数据连接系统;数据处理;数据服务;数据传送;定义;数字的;数字数据;数字工程;EDP;电气工程;电子仪器;电子系统;英语;现场总线;制导系统;工业的;工业设施;信息交换;信息处理;信息技术;接口;接口(数据处理);因特网协议;IP;链路层;开放系统互连;OSI;过程控制;过程控制工程;过程控制系统;信号;规范;规范(验收);传输媒质
【英文主题词】:Bussystems;Buses(dataprocessing);Circuitnetworks;Communication;Controlequipment;Controlsystems;Controltechnology;Datacommunication;Datalinklayers;Datalinksystem;Dataprocessing;Dataservices;Datatransfer;Definition;Definitions;Digital;Digitaldata;Digitalengineering;EDP;Electricalengineering;Electronicinstruments;Electronicsystems;Englishlanguage;Fieldbus;Guidancesystems;Industrial;Industrialfacilities;Informationinterchange;Informationprocessing;Informationtechnology;Interfaces;Interfaces(dataprocessing);InternetProtocol;IP;Linklayers;Opensystemsinterconnection;OSI;Processcontrol;Processcontrolengineering;Processcontrolsystems;Signals;Specification;Specification(approval);Transmissionmedia
【摘要】:ThispartofIEC61158providescommonelementsforbasictime-criticalmessagingcommunicationsbetweendevicesinanautomationenvironment.Theterm“time-critical”isusedtorepresentthepresenceofatime-window,withinwhichoneormorespecifiedactionsarerequiredtobecompletedwithsomedefinedlevelofcertainty.Failuretocompletespecifiedactionswithinthetimewindowrisksfailureoftheapplicationsrequestingtheactions,withattendantrisktoequipment,plantandpossiblyhumanlife.ThisstandarddefinesinanabstractwaytheexternallyvisibleserviceprovidedbytheType17fieldbusdata-linkLayerintermsofa)theprimitiveactionsandeventsoftheservice;b)theparametersassociatedwitheachprimitiveactionandevent,andtheformwhichtheytake;andc)theinterrelationshipbetweentheseactionsandevents,andtheirvalidsequences.Thepurposeofthisstandardistodefinetheservicesprovidedto?theType17fieldbusapplicationlayerattheboundarybetweentheapplicationanddatalinklayersofthefieldbusreferencemodel,and?systemsmanagementattheboundarybetweenthedata-linklayerandsystemsmanagementofthefieldbusreferencemodel;?specificationsTheprincipalobjectiveofthisstandardistospecifythecharacteristicsofconceptualdata-linklayerservicessuitablefortime-criticalcommunications,andthussupplementtheOSIBasicReferenceModelinguidingthedevelopmentofdata-linkprotocolsfortime-criticalcommunications.Asecondaryobjectiveistoprovidemigrationpathsfrompreviously-existingindustrialcommunicationsprotocols.ThisspecificationmaybeusedasthebasisforformalDL-Programming-Interfaces.Nevertheless,itisnotaformalprogramminginterface,andanysuchinterfacewillneedtoaddressimplementationissuesnotcoveredbythisspecification,includinga)thesizesandoctetorderingofvariousmulti-octetserviceparameters,andb)thecorrelationofpairedrequestandconfirm,orindicationandresponse,primitives.?ConformanceThisstandarddoesnotspecifyindividualimplementationsorproducts,nordoesitconstraintheimplementationsofdata-linkentitieswithinindustrialautomationsystems.Thereisnoconformanceofequipmenttothisdata-linklayerservicedefinitionstandard.Instead,conformanceisachievedthroughimplementationofthecorrespondingdata-linkprotocolthatfulfillstheType17data-linklayerservicesdefinedinthisstandard.
【中国标准分类号】:L79;M10
【国际标准分类号】:35_100_20;35_160;35_240_50
【页数】:34P.;A4
【正文语种】:英语