标准资料网-标准资料免费资源平台

【英文标准名称】:FixedRadioSystems-Characteristicsandrequirementsforpoint-to-pointequipmentandantennas-Part2-2:Digitalsystemsoperatinginfrequencybandswherefrequencyco-ordinationisapplied-HarmonizedENcoveringtheessentialrequirementsofArticl
【原文标准名称】:固定无线电系统.点对点设备和天线的特征和要求.第2-2部分:工作在采用频率协调频段的数字系统.包含基本要求的统一欧珠标准EN
【标准号】:DINEN302217-2-2-2009
【标准状态】:作废
【国别】:德国
【发布日期】:2009-10
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Antennas;Bandoffrequencies;Communication;Digital;Electricalengineering;Frequencies;Guidelines;Informationprocessing;Radioantennas;Radioengineering;Radiosystems;Ratings;Receivingstation;Specification(approval);Telecommunication;Telecommunications;Transmissionmethods;Transmissiontechnique
【摘要】:
【中国标准分类号】:
【国际标准分类号】:33_060_30;33_120_40
【页数】:2P.;A4
【正文语种】:德语


【英文标准名称】:StandardTestMethodforStereologicalEvaluationofPorousCoatingsonMedicalImplants
【原文标准名称】:医用植入物上多孔覆层的立体测量评价的标准试验方法
【标准号】:ASTMF1854-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:F04.15
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:coatinggradiants;metallography;porosity;porouscoatings;stereology;thickness;Meaninterceptlength;Metallicsurgicalimplantmaterials;Porosity--medical/surgicalmaterials;Stereologicalmeasurement;Thickness--surgicalimplantmaterials;Voidco
【摘要】:Allofthesetestmethodsarerecommendedforelementaryquantificationofthemorphologicalpropertiesofporouscoatingsbondedtosolidsubstrates.Thesetestmethodsmaybeusefulforcomparativeevaluationsofdifferentcoatingsordifferentlotsofthesamecoating.Withtheexceptionofusingthealternatemountingmethod,allthemethodsshouldbeperformedonthesameworkingsurfaces.Thealternatemountingmethodcanonlybeusedfor9.2and9.3.Astatisticalestimatecanbemadeofthedistributionsofthemeancoatingthicknessandthevolumepercentvoid.Noestimatecanbemadeofthedistributionofinterceptlengths.Therearelimitstotheaccuratecharacterizationofporosity,dependingonspacingbetweenthelinesinthelinegrid(orpointsinthepointgrid)andtheindividualandcumulativefieldsusedforthemeasurements.Increasingthesizeofthefields,increasingthenumberoffields,ordecreasingthegridspacingwillincreasetheaccuracyofthemeasurementsobtained.Thismethodisnotsuitableforceramiccoatingsforwhichaccuratecoatingcrosssectionscannotbeproducedusingmetallographictechniques.Thistestmethoddoesnotaddresscharacterizationofcoatingshavingathicknessoflessthan300x03BC;m.1.1Thistestmethodcoversstereologicaltestmethodsforcharacterizingthecoatingthickness,voidcontent,andmeaninterceptlengthofvariousporouscoatingsadheringtononporoussubstrates.1.2Amethodtomeasurevoidcontentandinterceptlengthatdistinctlevels(x201C;tissueinterfacegradientsx201D;)throughtheporouscoatingthicknessisoutlinedin9.4.1.3Thealternatesampleorientationmethodin8.2isnotsuitableforthetissueinterfacegradientsmethodin9.4.1.4ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:C45
【国际标准分类号】:11_040_40
【页数】:10P.;A4
【正文语种】:英语