JT/T 629-2005 Ku波段车/船载卫星电视接收站
作者:标准资料网 时间:2024-05-16 01:40:12 浏览:8342
来源:标准资料网
基本信息
| 标准名称： | Ku波段车/船载卫星电视接收站 |
| 英文名称： | Ku-band satellite television vehicular (shipborne) receive station |
| 中标分类： |
通信、广播 >>
广播、电视设备 >>
卫星广播设备 |
| ICS分类： |
电信、音频和视频技术 >>
音频、视频和视听工程 >>
其他音频、视频和视听
|
| 发布日期： | 2005-05-26 |
| 实施日期： | 2005-09-01 |
| 首发日期： | |
| 作废日期： | |
| 出版日期： | |
| 页数： | 10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： 通信 广播 广播 电视设备 卫星广播设备 电信 音频和视频技术 音频 视频和视听工程 其他音频 视频和视听
【英文标准名称】:StandardGuideforMonitoringofSuspended-SedimentConcentrationinOpenChannelFlowUsingOpticalInstrumentation
【原文标准名称】:利用光学仪器监测明渠流量悬沙浓度的标准指南
【标准号】:ASTMD7512-2009
【标准状态】:现行
【国别】:
【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】:D19.07
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:
【英文主题词】:continuousmeasurementofSSC;opticalmeasurements;sediment;sedimenttransport;streammonitoring;suspended-sedimentconcentration;suspended-sedimentload;turbidity
【摘要】:Thisguideisgeneralandintendedasaplanningguide.Tosatisfactorilymonitoraspecificsite,aninvestigatormustsometimesdesignspecificinstallationstructuresormodifythosegiveninthisguidetomeettherequirementsofthesiteinquestion.Becauseofthedynamicnatureofthesedimenttransportprocess,theextenttowhichcharacteristicssuchasmassconcentrationandparticle-sizedistributionareaccuratelyrepresentedinthemonitoringprogramdependsonthetypeofequipmentusedandmethodofcollectionoftheSSCsamplesusedtocalibratetheopticalreadings.Sedimentconcentrationishighlyvariableinbothtimeandspace.Numeroussamplesmustbecollectedandanalyzedwithproperequipmentandstandardizedmethodsfortheratingoftheopticalequipmentataparticularsite(seeGuideD4411andPracticeD3977).Allopticalequipmenthaveanupperlimitforvalidreadings,beyondwhichthemeterwillnotreadproperly,commonlyreferredtoasx201C;blackingout.x201D;IfupperrangeofSSCareexpectedtocauseopticalinstrumentblackout,thensomeothermeansshouldbedevised,suchasautomaticpumpingsamplers,tocollectsamplesduringthisperiod.SeeEdwardsandGlysson(1)andGlysson(2)forinformationoncollectionofsuspendedsedimentsamplesusingpumpingsamplers.Itshouldbenotedthatothertechnologies,suchaslasersandacousticdopplers,arealsobeingusedtomonitorSSCcontinuously.Theuserofthisguideshouldrealizethatbecausedifferenttechnologiesanddifferentmodelsofthesametechnologyofturbiditymeterscanproducesignificantlydifferentoutputsforthesameenvironmentalsample,onlyonemanufacturerandmodeloftheturbiditymetercanbeusedtodeveloptherelationshipbetweentheSSCandturbidityreadingsatasite.Ifadifferentmanufactureroradifferentmodeltypeofturbiditymeterisused,anewrelationshipwillneedtobedevelopforthesite.1.1Thisguidecoverstheequipmentandbasicproceduresforinstallation,operation,andcalibrationofopticalequipmentasasurrogateforthecontinuousdeterminationofsuspended-sedimentconcentration(SSC)inopenchannelflow.1.2Thisguideemphasizesgeneralprinciplesfortheapplicationofopticalmeasurementstobeusedtoestimatesuspended-sedimentconcentration(SSC)inwater.Onlyinafewinstancesarestep-by-stepinstructionsgiven.Continuousmonitoringisafield-basedoperation,methodsandequipmentareusuallymodifiedtosuitlocalconditions.Themodificationprocessdependsupontheoperatorskillandjudgment.1.3Thisguidecoverstheuseoftheoutputfromanopticalinstrument,suchasturbidityandsuspended-solidsmeters,torecorddatathatcanbecorrelatedwithsuspended-sedimentconcentration.Itdoesnotcovertheprocessofcollectingdataforcontinuousturbidityrecord,whichwouldrequireadditionalcalibrationoftheturbidityreadingstothemeanturbidityofthemeasurementcrosssection.Forthepurposesofthismethoditisassumedthatthedependentvariablewillbemeancross-sectionalsuspended-sedimentconcentrationdata.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesandtodeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:
【国际标准分类号】:17_120_20
【页数】:14P.;A4
【正文语种】:
【英文标准名称】:Aerospaceseries-Sockets,bi-hexagonal-Technicalspecification;GermanandEnglishversionEN3710:2008
【原文标准名称】:航空航天系列.双六角套筒.技术规范
【标准号】:EN3710-2008
【标准状态】:现行
【国别】:
【发布日期】:2008-12
【实施或试行日期】:
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:验收规范;航空航天运输;航空运输;交货条件;名称与符号;尺寸;硬度;六角(边)形;多语种的;性能;套管扳手;管套扳手;航天运输;规范(验收);表面处理
【英文主题词】:Acceptancespecification;Aerospacetransport;Airtransport;Deliveryconditions;Designations;Dimensions;Hardness;Hexagon;Multilingual;Properties;Socketspanners;Socketwrenches;Spacetransport;Specification(approval);Surfacetreatment
【摘要】:
【中国标准分类号】:V95
【国际标准分类号】:49_030_99
【页数】:16P.;A4
【正文语种】:英语
