【英文标准名称】:StandardTestMethodforDeterminingChemicalCompatibilityofThreadSealantswithThermoplasticThreadedPipeandFittingsMaterials
【原文标准名称】:热塑性螺纹管和配件材料用螺纹封装剂的化学兼容性测定的标准试验方法
【标准号】:ASTMF2331-2004
【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(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:热塑性的;测定;兼容性;试验;配件;螺纹;密封层(剂);管道配件;化学的
【英文主题词】:Chemical;Compatibility;Determination;Fittings;Pipefittings;Sealants;Testing;Thermoplastic;Thread
【摘要】:
【中国标准分类号】:J13
【国际标准分类号】:23_040_80
【页数】:2P;A4
【正文语种】:英语


【英文标准名称】:Characterizationofpavementtexturebyuseofsurfaceprofiles-Part4:Spectralanalysisofsurfaceprofiles
【原文标准名称】:表面外观路面结构的特性.第4部分:表面轮廓的光谱分析
【标准号】:ISO/TS13473-4-2008
【标准状态】:现行
【国别】:国际
【发布日期】:2008-05
【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/TC43
【标准类型】:()
【标准水平】:()
【中文主题词】:声信号;声学;应用;车行道(公路);分类;数据处理;定义;测定;精整;解释;轮廓的研究;测量;测量仪器;测量范围;方法;噪声降低;路面(道路);剖面高度;轮廓;轮廓曲线仪;道路磨耗层;道路上层结构;扫描;光谱分析;表面性质;表面;工艺学;测试;纹理
【英文主题词】:Acousticsignals;Acoustics;Applications;Carriageways;Classification;Dataprocessing;Definition;Definitions;Determination;Finishes;Interpretations;Investigationofprofiles;Measurement;Measuringinstruments;Measuringranges;Methods;Noisereduction;Pavements(roads);Profilheight;Profile;Profilometers;Roadcarpets;Roadsuperstructure;Scanning;Spectralanalysis;Surfaceproperties;Surfaces;Technology;Testing;Texture
【摘要】:ISO/TS13473-4:2008describesthemethodsthatareavailabletoperformaspectralanalysisofpavementsurfaceprofilesignals.Itspecifiesthreepossiblemethodsforspatialfrequencyanalysis(ortexturewavelengthanalysis)oftwo-dimensionalsurfaceprofilesthatdescribethepavementroughnessamplitudeasafunctionofthedistancealongastraightorcurvedtrajectoryoverthepavement.Theresultofthefrequencyanalysiswillbeaspatialfrequency(ortexturewavelength)spectruminconstant-percentagebandwidthbandsofoctaveorone-third-octavebandwidth.ISO/TS13473-4:2008offersthreealternativemethodstoobtainthesespectra:1)analogueconstant-percentagebandwidthfiltering;2)digitalconstant-percentagebandwidthfiltering;3)constantnarrowbandwidthfrequencyanalysisbymeansofDiscreteFourierTransform,followedbyatransformationofthenarrow-bandspectrumtoanoctave-orone-third-octave-bandspectrum.TheobjectiveofISO/TS13473-4:2008istostandardizethespectralcharacterizationofpavementsurfaceprofiles.Thisobjectiveispursuedbyprovidingadetaileddescriptionoftheanalysismethodsandrelatedrequirementsforthosewhoareinvolvedinpavementcharacterization,butarenotfamiliarwithgeneralprinciplesoffrequencyanalysisofrandomsignals.Thesemethodsandrequirementsaregenerallyapplicabletoalltypesofrandomsignals.
【中国标准分类号】:P66
【国际标准分类号】:17_140_30;93_080_20
【页数】:35P;A4
【正文语种】:英语