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ANSI/ISO 7779(incl AMD1)-1999 声学.信息技术设备和电信设备气载噪声测量

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【英文标准名称】:Acoustics-MeasurementofAirborneNoiseEmittedbyInformationTechnologyandTelecommunicationsEquipment
【原文标准名称】:声学.信息技术设备和电信设备气载噪声测量
【标准号】:ANSI/ISO7779(inclAMD1)-1999
【标准状态】:作废
【国别】:美国
【发布日期】:1999
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:电信;试验;声学;信息技术;噪声(环境的)
【英文主题词】:Acoustictesting;Acoustics;Airbornenoise;Airbornesound;CD-player;CD-ROM;Computerhardware;Computers;Definition;Definitions;Determination;Diskdrives;DVD;Informationtechnology;Installations;Measurement;Measuringenvironment;Measuringincertainity;Noiseemissions;Noise(environmental);Noisemeasurements;Officeequipment;Officemachines;Operatingconditions;PC;Personalcomputers;Printers;Reverberationroommethod;Soundlevel;Soundpressurelevel;Telecommunications;Terminals;Testing;Tests;Workingplaces
【摘要】:Specifiesmethodsformeasurementofairbornenoiseemittedbyinformationtechnologyandtelecommunicationsequipment.Hitherto,widevarietyofmethodshavebeenappliedbymanufacturersanduserstosatisfyparticularequipment/applicationneeds.Thesepracticesmakecomparisonofnoiseemissiondifficult.Simplifiescomparisons&isthebasisfordeclarationofnoiseemissionlevelsofinfotechnologyandtelecommunicationsequipment.NationalAdoptionofISO7779:1999withamendmentFDAM1.
【中国标准分类号】:Z32
【国际标准分类号】:17_140_20;35_180;35_260
【页数】:
【正文语种】:英语


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【英文标准名称】:StandardSpecificationforSemi-CrystallinePoly(lactide)PolymerandCopolymerResinsforSurgicalImplants
【原文标准名称】:外科植入物用半结晶(交酯)聚合物和共聚物树脂的标准规范
【标准号】:ASTMF1925-2009
【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】:F04.11
【标准类型】:(Specification)
【标准水平】:()
【中文主题词】:
【英文主题词】:PGA:PLA;PLA;PLA:PGA;PLGA;PlLA;polyglycolic:lacticacid;poly(glycolide:lactide);poly(lacticacid);polylactic:glycolicacid;polylactide;poly(lactide);poly(lactide:glycolide);poly(l-lact
【摘要】:1.1Thisspecificationcoversvirginsemi-crystallinepoly(l-lactide)orpoly(d-lactide)homopolymerresinsintendedforuseinsurgicalimplants.Thisspecificationalsocoverssemi-crystallineresinsofl-lactidecopolymerizedwithotherbioabsorbablemonomersincluding,butnotlimitedto,glycolide,d-lactide,anddl-lactide.Thepoly(l-lactide)orpoly(d-lactide)basedhomopolymersandcopolymerscoveredbythisspecificationpossesslactidesegmentsofsufficientlengthtoallowpotentialfortheircrystallizationuponannealing.1.2Sincepoly(glycolide)iscommonlyabbreviatedasPGAforpoly(glycolicacid)andpoly(lactide)iscommonlyabbreviatedasPLAforpoly(lacticacid),thesepolymersarecommonlyreferredtoasPGA,PLA,andPLA:PGAresinsforthehydrolyticbyproductstowhichtheyrespectivelydegrade.PLAisatermthatcarriesnostereoisomericspecificityandthereforeencompassesboththeamorphousatactic/syndiotacticdl-lactidebasedpolymersandcopolymersaswellastheisotacticd-PLAandl-PLAmoieties,eachofwhichcarriespotentialforcrystallization.Inclusionofstereoisomericspecificitywithinthelacticacidbasedacronymsresultsinthefollowing:poly(l-lactide)asPlLAforpoly(l-lacticacid),poly(d-lactide)asPdLAforpoly(d-lacticacid),andpoly(dl-lactide)asPdlLAforpoly(dl-lacticacid).1.3Thisspecificationisapplicabletolactide-basedpolymersorcopolymersthatpossessisotacticpolymericsegmentssufficientinsizetocarrypotentialforlactide-basedcrystallization.Suchpolymerstypicallypossessnominalmolefractionsthatequalorexceed50%l-lactide.Thisspecificationisparticularlyapplicabletoisotactic-lactidebasedblockcopolymersortopolymersorcopolymerssynthesizedfromcombinationsofd-lactideandl-lactidethatdifferbymorethan1.5totalmolepercent(1.5%oftotalmoles).Thisspecificationisnotapplicabletolactide-co-glycolidecopolymerswithglycolidemolefractionsgreaterthanorequalto70%(65.3%inmassfraction),whicharecoveredbySpecificationF2313.Thisspecificationisnotapplicabletoamorphouspolymersorcopolymerssynthesizedfromcombinationsofd-lactideandl-lactidethatdifferbylessthan1.5totalmolepercent(1.5%oftotalmoles)ascoveredbySpecificationF2579.1.4Thisspecificationcoversvirginsemi-crystallinepoly(lactide)-basedresinsabletobefullysolvatedat30x00B0;Cbyeithermethylenechloride(dichloromethane)orchloroform(trichloromethane).Thisspecificationisnotapplicabletolactide:glycolidecopolymersthatpossessglycolidesegmentssufficientinsizetodeliverpotentialforglycolide-basedcrystallization,therebyrequiringfluorinatedsolventsforcompletedissolutionunderroomtemperatureconditions(seeSpecificationF2313).1.5Withinthisspecification,semi-crystallinitywithintheresinisdefinedbythepresenceofaDSC(differentialscanningcalorimetry)crystallineendothermafterannealingabovetheglasstransitiontemperature.Whileothercopolymerics......
【中国标准分类号】:C45
【国际标准分类号】:83_080_20
【页数】:9P.;A4
【正文语种】:英语


【英文标准名称】:Methodforthedeterminationofthespacerequiredbycapacitorsandresistorswithunidirectionalterminations
【原文标准名称】:具有单向终端的电容器和电阻器所需空间的测定方法
【标准号】:IEC60717-1981
【标准状态】:作废
【国别】:国际
【发布日期】:1981
【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/TC40
【标准类型】:()
【标准水平】:()
【中文主题词】:分单双面(向)的;尺寸;电阻器;电气工程;空间要求;连接;测量;尺寸测量;接线端;电容器
【英文主题词】:Capacitors;Connections;Dimensionalmeasurement;Dimensions;Duesided;Electricterminals;Electricalengineering;Measurement;Resistors;Spacerequirement
【摘要】:Appliestocapacitorsandresistorsintendedforuseinelectronicequipment.Determinesthewidthandlengthofthecomponentsusingagaugecontainingamatrixofholesbasedonstandardgriddimensions.Givesaguidefordeterminationtheheightofth
【中国标准分类号】:L13;L11
【国际标准分类号】:31_040_01;31_060_01
【页数】:9P.;A4
【正文语种】:英语