Product Code:SAE AMS5781
Title:Steel Welding Electrodes, Covered, Corrosion and Moderate Heat Resistant 15.5cr 4.5ni 2.9mo 0.10n (Cancelled Oct 2001)
Issuing Committee:Ams F Corrosion Heat Resistant Alloys Committee
Scope:This specification covers a corrosion and moderate heat resistant steel in the form of covered welding electrodes.
基本信息
| 标准名称： | 数控机床用六齿莫氏锥柄立铣刀 d＝22？63mm |
| 中标分类： |
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| 发布日期： | 1994-06-01 |
| 实施日期： | 1994-06-01 |
| 首发日期： | 1900-01-01 |
| 作废日期： | 1900-01-01 |
| 出版日期： | 1900-01-01 |
| 页数： | 5页 |
适用范围
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前言
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目录
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引用标准
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所属分类：
【英文标准名称】:StandardPracticeforComputingRideNumberofRoadsfromLongitudinalProfileMeasurementsMadebyanInertialProfileMeasuringDevice
【原文标准名称】:通过用惯性纵剖面测量装置做的纵剖面测量来计算道路承载值的标准方法
【标准号】:ASTME1489-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:E17.33
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:longitudinalprofile;meanpanelratings(MPR);panelrating;pavementridequality;profileindex;rideability;ridenumber(RN);subjectiveridequality;subjectiveridequalityestimate;Inertialmeasurement;Longitudinalprofile;Meanpanelrating(M
【摘要】:Thispracticeprovidesameansforobtainingaquantitativeestimateofapavementpropertydefinedasridequalityorrideabilityusinglongitudinalprofilemeasuringequipment.TheRideNumber(RN)isportablebecauseitcanbeobtainedfromlongitudinalprofilesobtainedwithavarietyofinstruments.TheRNisstablewithtimebecausetrueRNisbasedontheconceptofatruelongitudinalprofile,ratherthanthephysicalpropertiesofparticulartypeofinstrument.Ridequalityinformationisausefulinputtothepavementmanagesystems(PMS)maintainedbytransportationagencies.Thesubjectiveridequalityestimateproducedbythispracticehasbeendetermined(6)tobehighlycorrelated(r=0.92)withmeasuredsubjectiveridequalityandtoproducealowstandardestimateoferror(0.29RNunits)fortheridequalityestimate.Thesubjectiveridequalityestimatesproducedbythispracticewerefoundtobenotsignificantlydifferentwithrespecttopavementtype,roadclass,vehiclesize,vehiclespeed(withinpostedspeedlimits),andregionalityovertherangeofvariablesincludedintheexperiment(1,2,3,and4).Thesubjectiveridequalityestimatesproducedbythispracticehavebeenfoundtobegoodpredictorsoftheneedofnon-routineroadmaintenanceforthevariousroadclassifications(3).Theuseofthispracticetoproducesubjectiveridequalityestimatesfrommeasuredlongitudinalprofileeliminatestheneedforexpensiveridepanelstudiestoobtainthesameridequalityinformation.1.1Thispracticecoversthemathematicalprocessingoflongitudinalprofilemeasurementstoproduceanestimateofsubjectiveridequality,termedRideNumber(RN).1.2Theintentofthispracticeistoprovidethehighwaycommunityastandardpracticeforthecomputingandreportingofanestimateofsubjectiveridequalityforhighwaypavements.1.3ThispracticeisbasedonanalgorithmdevelopedinNationalCooperativeHighwayResearchProject(NCHRP)1x2013;23(1and2),twoOhioDepartmentofTransportationridequalityresearchprojects(3and4),andworkpresentedinRefs(5and6).1.4ThecomputedestimateofsubjectiveridequalityproducedbythispracticewasnamedRideNumber(RN)inNCHRPResearchProject1x2013;23(1and2)todifferentiateitfromothermeasuresofridequalitycomputedfromlongitudinalprofile.Eq1ofSection8.2representsthemathematicaldefinitionofRideNumber.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:P66
【国际标准分类号】:93_080_99
【页数】:16P.;A4
【正文语种】:英语