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    • 簡介:基于離散頻譜的L波段數(shù)字航空通信系統(tǒng)資源分配研究重慶大學博士學位論文學生姓名黃杰指導教師曾孝平教授專業(yè)通信與信息系統(tǒng)學科門類工學重慶大學通信工程學院二O一七年四月STUDYONRESOURCEALLOCATIONINNONCONTINUOUSSPECTRUMFLBDIGITALAERONAUTICALCOMMUNICATIONSYSTEMATHESISSUBMITTEDTOCHONGQINGUNIVERSITYINPARTIALFULFILLMENTOFTHEREQUIREMENTFTHEDOCT’SDEGREEOFENGINEERINGBYHUANGJIESUPERVISEDBYPROFZENGXIAOPINGSPECIALTYCOMMUNICATIONINFMATIONSYSTEMCOLLEGEOFCOMMUNICATIONENGINEERINGOFCHONGQINGUNIVERSITYCHONGQINGCHINAAPRIL2017
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      上傳時間:2024-03-01
      頁數(shù): 124
      7人已閱讀
      ( 4 星級)
    • 簡介:南京航空航天大學碩士學位論文航空公司飛機恢復系統(tǒng)問題初步研究姓名柏強申請學位級別碩士專業(yè)交通運輸規(guī)劃與管理指導教師胡明華20060101航空公司飛機恢復問題初步研究IIABSTRACTAIRLINESARECONSTANTLYFACEDWITHDISRUPTIONPROBLEMSANDCANNOTEXECUTETHEIRSCHEDULESASPLANNEDBECAUSEOFSEVEREWEATHERPATTERNS,UNEXPECTEDAIRCRAFTMECHANICALFAILURES,CONGESTIONATAIRPORTETCWHENADISRUPTIONOCCURS,THEAIRLINEHAVETORESCHEDULEFLIGHTLEGS,NEEDAPOLICYTODECIDEWHICHFLIGHTLEGSNEEDTOBEDELAYEDANDWHICHONESNEEDTOBECANCELLED,ANDREROUTETHEAIRCRAFTS,CREWS,ANDPASSENGERSTHISPAPERSUMMARIZEDTHESOLUTIONSCURRENTLYADOPTEDBYAIRLINESUNDERTHECIRCUMSTANCESOFINTERRUPTIONSAFTERFULLYMASTERINGTHECOREBUSINESSOFTHEMOSTIMPORTANTDEPARTMENTOFAIRLINESAOCAFTERWARDS,SEVERALEXISTINGMODELSOFAIRLINESRECOVERYWEREREVIEWEDANDTHEAIRLINESINTEGRATEDRECOVERYMODELWASINTRODUCEDINDETAILSTHEAIRCRAFTRECOVERYMODELWITHTHEINTENTIONOFMINIMIZINGAIRLINESOPERATINGCOSTWASRESEARCHEDINDEPTH,INCLUDINGESTABLISHMENTOFTHEMODELANDTHECORRESPONDINGALGORITHMTHESOLUTIONTOTHEAIRCRAFTRECOVERYPROBLEMWASPROPOSEDANDAHEURISTICALGORITHMWASPUTFORWARDTOENGAGECERTAINAIRCRAFTSINTHEREROUTINGCALCULATIONACCORDINGTOTHEDIFFERENTKINDSOFINTERRUPTIONSFINALLY,BASEDONTHEABOVEAIRCRAFTRECOVERYSOLUTION,ADECISIONSUPPORTTOOLOFAIRCRAFTRECOVERYWASDEVELOPEDBYUTILIZINGOFCOMPUTERDEVELOPINGTOOLS,WHICHONTHEOTHERHANDVERIFIEDTHEAIRCRAFTRECOVERYMODELKEYWORDSAIRLINEIRREGULAROPERATION,AIRLINERECOVERYPROBLEM,AIRCRAFTRECOVERY,OPTIMIZATIONMODEL
      下載積分: 5 賞幣
      上傳時間:2024-03-01
      頁數(shù): 62
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    • 簡介:中圖分類號V214論文編號102870113S049學科分類號080104碩士學位論文航空結構關鍵部位損傷識別方法研究研究生姓名金培學科、專業(yè)工程力學研究方向結構健康監(jiān)測指導教師周麗教授南京航空航天大學研究生院航空宇航學院二○一三年三月NANJINGUNIVERSITYOFAERONAUTICSANDASTRONAUTICSTHEGRADUATESCHOOLCOLLEGEOFAEROSPACEENGINEERINGRESEARCHONDAMAGEDETECTIONMETHODSFORAEROSPACESTRUCTURALHOTSPOTSATHESISINENGINEERINGMECHANICSBYJINPEIADVISEDBYPROFZHOULISUBMITTEDINPARTIALFULFILLMENTOFTHEREQUIREMENTSFORTHEDEGREEOFMASTEROFENGINEERINGDECEMBER,2012
      下載積分: 5 賞幣
      上傳時間:2024-03-01
      頁數(shù): 90
      0人已閱讀
      ( 4 星級)
    • 簡介:分類弓V23題目學佼代碼10699研究生學號046076382西北工業(yè)大學碩士學位論文學位研究生作者趔D態(tài)學科專業(yè)控劍堡途皇控劍工猩指導教師楚工2007年3月西北工業(yè)大學碩士學位論文英文摘要ABSTRACTTHEHI咖DUTY觚LCOOLEDOILTESTBEDISANIMPONARLTEQUIPMENTFORTLI舟D啊MELCOOLEDOILCOOLERTOBEIILSPECTEDANDRESEARCHEDINORDERTOI11SDECTCOOLERMORCQUICKLYAILDSAFCLY,ANDALSOIMPROVCCOQORATION’SECONOMICBENE矗TS,N,SNECESSAN,TODESIGNMELLI曲DUTY如E1COOLEDOILTESTBEDTILATCON打01WITHTHCCOM口UTERFIRSTLY’THISPAPERIN仃ODUCESMEDEVELOPMENTOFCOMPUTERCON仃OLTHEORY徹DT11ETESTINGPROCESSOFLLIGHDMY如ELCOOLEDOILCOOLERACCORDINGTOTHEREQUESTFORTESTING,MESCHEMEOFTESTBEDISPRESENTSECONDLY,BASEDONTHE鋤LYSISOFSYSTEM’SJ1ARD啪RE,NLEP印ER丘NISHEDT王LEDESIGLLOFTHISSYSTEM’SHARD呲AILDAISOSEIEC倒APP跏CUSTHJRDLY,HOWTODES咖111IS螂BED’SSORWAREARCINTRODUCEDFINALLY,APIDCONTROLLERFORTEMPERATUREISDESIGNED觚DSIMUIATEDASTILDYONYSTEMCOMMISSIONINGISPRESEMEDATJASTIN協(xié)EANICLETHEPRACTICALSHOWSTHATTHESYSTCMDESIGNISFCASIBLEAILDREACHESTTLEREQUIREMENTSPRESET【KEYWORD】HIGHDUTY舭LCOOLEDOILC00IERVISUALB∞ICTESLBEDCOMPUTERC0NTROLDALAB船EN
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      上傳時間:2024-03-01
      頁數(shù): 66
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    • 簡介:西北工業(yè)大學碩士學位論文光纖通道在航空計算領域的研究和應用姓名宋少峰申請學位級別碩士專業(yè)計算機科學與技術指導教師張延園20070301ABSTRACTW汕T11EDEVELOPMENTOFAVIOTRONICS,WENEEDHI曲ERDATA一柵1SMITSPEEDINAYIONICSCOMPUTEFIELDATT11ES鋤ETIME,AGRCATDEALDATASHOLLLDBETRANSMINEDAMONGONBOARDELECTRONICSEQUIPMENTINCOMPLEXNETWORKENVIRONMENT;BOWEVER,TRADITIONALONBOARDNETWORKSYSTEMCAILNOTAFRORDTHATNEWMATERIALANDPROTOCOLARENEEDEDDATACANBCT啪SMITCEDAT齜SPEEDOFGB№INFIBRE礬ATISMORE,F(xiàn)IBRCHASTHEABIL畸OFANTIJ鋤MINGA11DBITEHDRRATELLLLDER10叫2,W11ICHPROVIDESHI曲RELIABILITY10WLATENCY,“GHISPEEDCOMMUNICATIONSOLUTIONT11ISPAPERIN打ODUCESTHEDEVELOPMENTHISTORYOFAVIOILICSNE柳OTI【INGTECLLILOLOGY,∞SEARCHESFIBRECHANNELTECHNOLOGY’DISCUSSESUPPERM印PINGPROTOCOLOFFIBRECHANNELIN耐ONICSENVIROMENT,ANDPROPOSESAILIMPLEMENTEDMC也ODOFFCLP助RECHANNEL1IGHT、ⅣEIGHTPMTOC01BECAUSEOFTHEREQUIREMEMFORHI曲RELIABILI饑LOWLATENCYANDHI曲SPEEDINAVIONJCSENVIRONMENT,WESIMPIIFIEDSCSICO咖ANDSA11DREDUCETHEHEADEROFDATA矗跏ETHETRAILSMITSPEEDISIINPROVEDTHEN,THEPAPERPROPOSEST11EDESIGLLANDHPLEMEMAT王ONOFTASKN1卸AG鋤EMWEDESIGNTLLREEQUEUESTOMANAGEDI臟RCNTTASKS,W11ICHWILLENSURCEVERYTASK1111DERCONTR01PRIORITYMECHANISMANDMILLISECONDOVEMMESYSTEMARCADOPTEDTOENSURERCALTIⅡLEP髓FBRNLANCEWEUSEDI恐REMPRIORITIESTODIS廿NGUISHTHEIINPORTANCEOFDI彘RENTDATA,AND“CTOVENIMESYSTEMTOENSLLRETASKSTOBEFINISHEDINSPECIFICALLYPERIODMEALL、,HILE,MTLLTISTATECHANNEL,INTE舒ATEDS詛1【ETRANSITIONPLALLATLDSYNCHRONOUS/ASYNCHRONOUSMODELAREDESI911EDTOIMPROVERCLIABILI可ANDNEXIBILI夠FINALLY,WETESTTHESYSTEM’SRELIA_BILITYANDCOMMUNICATIONPERFBRMANCEARERALONGTIMETEST,TLLERESULTSHOWSTLLATMESYSTEMMEETSRCQLLIREMENTSOFAVIONICSENVIM工LIILENTBO血INREALTIMEANDRELIABILITYFCLPSYSTEMISIMPORTAMTESEARCHNEXTGENERATIONA、,IONICSCOMMUNICATIONSYSTEMKEYWORDSAVIONICS,F(xiàn)C,F(xiàn)CLP,EMBEDDED,REALTIME,RELIABILITYII
      下載積分: 5 賞幣
      上傳時間:2024-03-01
      頁數(shù): 63
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    • 簡介:匠兩L⑧目MR镕一M★天洋大尊TIANJLNUNVERSITY碩士學位論文學科專業(yè)絲蘭王莖作者姓名型盍擅指導教師苤擔盎塾撞天津大學研究生院2006年1月ABSTRACTCFITICFLTEMPERATURESANDPRESSURESOFFUELSAREIMPORTANTPARAMETERSFURRATINGOFMERITWHICHDEFINETHEPHASEBEHAVIORS,PERFORMANCEANDTEMPERATURERANGEOFFUELSAPPLIEDINTHEAIRPLANESANDHYPERSONICAIRCRAFTSINADDITIONTHEYAREVERYUSEFULINTHEINVESTIGATIONOFTHETHERMALDEGRADATIONORAGGREGATIONANDCARBONDEPOSITUNDERSUBSUPERERITICALCONDITIONSOFFUELSITISGENERALLYDIFFICULTTOMEASURETHECRITICALDATAOFFUELSDUETOITSCOMPLEXCOMPOSITIONUNSTABLEFEATURESANDHIGHERCRITICALVALUESINTHISTHESIS,VARIOUSEXPERIMENTALMETHODSANDTHEORYTODETERMINECRITICALPROPERTIESOFSUBSTANCEWEREINTRODUCEDONELOWRESIDENCETIMEFLOWEQUIPMENTFORTHEMEAGUREMEMOFTHECRITICALTEMPERATURESANDPRESSURESOFTHERMALUNSTABLEFLUIDSWAGDESIGNEDITIMPROVEDTHEORGMALMETHODSANDENLARGEDTHERANGEOFTEMPERATURESANDPRESSURESMEAGUREZL_,WITLLTHETESTEDTEMPERATUREAS0500。CANDTESTEXLPRESSURE雒05MPNPENTANE、NHEXANE、CYCLOHEXANEANDNDECANEWEREUSED嬲STANDARDREAGENTSTOCHEEKTHERELIABILITYOFTHEAPPARATUSTHEMAXIMUMDEVIATIONOFTEMPERATUREANDPRESSURESARE028。CANDO006MPARESPECTIVELYTHESERESULTSFULLYPROVETHATTHEAPPARATUSISRELIABLETODETERMINETHECRITICALDATAOFTHERMALUNSTABLEFLMDSTHECRITICALTEMPERATURESANDPRESSURESOFTWOENDOTHERMICHYDROCARBONFUELSRP3ANDSIMULATEJP7,ONEHIGLLENERGYFUELSJP10ANDMIXTURESOFJPLOWI也METHYLEYCLOHEXANEMC聊WEREDETERMINEDFORTHEFIRSTTIMEINADDITIONTHECRITICALDATAOFENDOTHERMIEAVIATIONFUELSOFRP3ANDSIMULATEJP7WEREESTIMATEDUSING6METHODSTHETEMPERATUREDEVIATIONWAGLESSTHAN6630C,ANDTHEPRESSUREDEVIATIONSAMONGESTIMATEDMETHODSHOWEVERCALLBEASMUCH硒O828MPATHEMAXILNUNLRELATIVEERTOROFTEMPERATURESANDPRESSURESWERE167%AND384%,RESPECTIVELYTHEAPIMETHODS,ANDRIAZIANDDANBERTCORRELATIONARERELATIVELYRELIABLEANEWMETHODTODETERMINETHECRITICALDATAUSINGHIGHPRESSUREDIFFERENTIALSCANNINGCALORIMETRYWAGPROPOSED,WHICHCANINFERREDTHECRITICALTEMPERATURESANDPRESSURESFROMVARIOUSDSCCURVESUNDERDIFFERENCESMEASURINGPRESSURETHECRITICALDATAOFNPENTANEANDJP10WEREOBTAINEDFROMTHISMETHOD,THERESULTSWERE19760CAND337MPA4238。CAND360MP丑RESPECTIVELYTHERESULTSWEREINGOODAGREEMEMWITHTHEPUBLISHEDDATAINDICATINGTHATTHISMETHODISRELIABLEINPRACTICAL
      下載積分: 5 賞幣
      上傳時間:2024-03-01
      頁數(shù): 66
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    • 簡介:南京航空航天大學碩士學位論文航空發(fā)動機混疊振動信號的盲源分離研究姓名陽平申請學位級別碩士專業(yè)航空宇航推進理論與工程指導教師李舜酩20080101航空發(fā)動機混疊振動信號的盲源分離研究IIABSTRACTMODERNSIGNALPROCESSINGMETHODSCAN’TSEPARATETHECOMPLICATEDMULTIMIXEDVIBRATIONSIGNALSEFFECTIVELYWITHOUTANYPREINFMATIONASONEOFTHEHOTTESTMOSTEXCITINGTOPICSINTHEFIELDSOFSIGNALPROCESSINGATPRESENTBLINDSOURCESEPATIONBSSISPAIEDATTENTIONFSOLVINGTHISPROBLEMBUTTHERESEARCHESAREMOSTLYABOUTTHETHEYSIMULATIONLITTLEININTHEREALSIGNALAPPLICATIONTHEMAJWKOFTHISPAPERISTORESEARCHTHEEXISTINGMETHODSOFBSSTHENGETSOMEIMPROVEDMETHODSFITTEDFSEPARATINGTHEVIBRATIONSIGNALSWHICHWILLPROVIDEANEWWAYFTHESTATESTIRINGDIAGNOSISOFAIRCRAFTENGINESTHESPECIFICWKASFLOWERING1ANALYSEDEXPLAINEDTHEINDEPENDENTCOMPONENTANALYSISICATHEYALGITHMINDETAILGAVETHECLASSOFCEFUNCTIONAWAYOFITSION2PROPOSEDANIMPROVEDALGITHMCALLEDICAWITHREFERENCEICARWHICHISCOMBINEDWITHACTERSOFTHEVIBRATIONSIGNALTOPURSUITTHEEXPECTEDONETHROUGHSIMULATIONANALYSISTHISTECHNIQUEHASNOTONLYMESEPARATINGPRECISIONBUTALSOFASTERCONVERGENCETHANTRADITIONALMETHODS3ANALYSEDSTSOFVIBRATIONEXPERIMENTSUSINGBSSACHIEVEDSOMEAVAILABLECONCLUSIONSADAPTIVEMETHODSWHICHWASSUCCESSFULTOCONFIRMTHEVALIDITYOFBSSAPPLIEDTOSEPARATINGVIBRATIONSIGNAL4ABSSPACKAGEUSINGMATLABVCSOFTWARESWASDESIGNEDBASEDONTHETHEYOFSETTINGPARAMETERSTHISPACKAGEMADETHEOPERATIONOFBSSSIMULATIONSAPPLICATIONSCONVENIENTLYUNDERAGRAPHICALINTERFACESCONTROLKEYWDSBLINDSOURCESEPARATIONBSSVIBRATIONSIGNALCEFUNCTIONINDEPENDENTCOMPONENTANALYSISWITHREFERENCEICARBSSPACKAGE
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      上傳時間:2024-03-01
      頁數(shù): 84
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    • 簡介:分類號密級UDC編號專業(yè)碩士學位論文(工程碩士)航空用可快拆蜂窩夾層艙門強度等效模型研究碩士研究生劉祥指導教師陳東良副教授企業(yè)導師季寶鋒工程師工程領域機械工程論文主審人王茁教授哈爾濱工程大學2014年5月分類號密級UDC編號專業(yè)碩士學位論文(工程碩士)航空用可快拆蜂窩夾層艙門強度等效模型研究碩士研究生碩士研究生劉祥指導教師指導教師陳東良副教授學位級別學位級別工程碩士工程領域工程領域機械工程所在單位所在單位機電工程學院論文提交日期論文提交日期2014年5月論文答辯日期論文答辯日期2014年6月學位授予單位學位授予單位哈爾濱工程大學
      下載積分: 5 賞幣
      上傳時間:2024-03-01
      頁數(shù): 104
      3人已閱讀
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    • 簡介:上海交通大學碩士學位論文航空發(fā)動機變比熱容熱力計算和系統(tǒng)級仿真研究姓名韋福申請學位級別碩士專業(yè)航空宇航推進理論與工程指導教師杜朝輝20060201上海交通大學碩士論文摘要II和組分燃氣的復雜函數(shù)其中壓力對比熱容的影響很小氣體經(jīng)過燃燒室和燃油混合燃燒后生成的燃氣由多種不同性質(zhì)的物質(zhì)組成而且隨著余氣系數(shù)不同其成分及比例不同物性也不一樣如果都考慮每種氣體的比熱容就會給計算帶來困難為了計算方便將系統(tǒng)的工質(zhì)分為空氣和純?nèi)細庥扇剂吓c理論空氣量完全燃燒而成的的混合分別考慮他們的比熱容如果是燃燒室前的模塊比如進氣道壓氣機等可把其工質(zhì)看成燃氣為零的混合氣體純空氣一般的比熱容是按照空氣和純?nèi)細獾谋葻崛莞鶕?jù)質(zhì)量分數(shù)關系線性組合而成的然后對每一模塊建立變比熱容的數(shù)學計算模型同時以單軸渦輪噴氣式發(fā)動機為算例進行計算仿真跟用軟件GASTURB和定比熱計算的結果相比較證明變比熱的計算結果合理性和更接近物理實際以及有推廣應用的價值最后利用已有的模塊庫對常見的發(fā)動機系統(tǒng)比如渦輪噴氣渦輪軸渦輪螺漿渦輪風扇等進行系統(tǒng)建模仿真并對它們進行設計點和非設計點的熱力計算非設計點仿真計算包括速度特性高度特性和節(jié)流特性的計算還有過渡工作狀態(tài)比如啟動加速減速接通加力與斷開加力等仿真從計算結果的分析和與GASTURB的計算相比較中可以看出利用MODELICADYMOLA進行建模仿真的方法具有有效性通用性合理性可行性和便捷性等關鍵詞航空發(fā)動機模塊化建模變比熱容仿真DYMOLAMODELICA
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      上傳時間:2024-03-01
      頁數(shù): 95
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