簡介：分類號密級UDC編號河北工業(yè)大學碩士學位論文民用航空飛機實時參數信息提取民用航空飛機實時參數信息提取方法研究及驗證方法研究及驗證論文作者李永津學生類別全日制專業(yè)學位類別工程碩士領域名稱電子與通信工程指導教師李景春職稱教授級高級工程師資助基金項目國家自然科學基金（61139001）

簡介：大連理工大學碩士學位論文高強抗熱腐蝕航空渦輪葉片材料（DZ68）的初步研制姓名于忠鋒申請學位級別碩士專業(yè)材料表面工程指導教師于永泗鄭志20070601高強抗熱腐蝕航空渦輪葉片材料DZ68的初步研制PRIMARYDEⅦLOPM匝NTOFHIGHS眥N冊ANDHOTCORROSIONITESISTANCEAEROENGINETURBINEBLADEMATER【ALDZ68ALLOYABSTRACTINORDERTOMEETTHEREQUIREMENTSOFMARINEGASTURBINEBLADEMATERIALSANEWTYPEDDIRECTIONALSOLIDIFICATIONNICKELBASESUPERALLOYDZ68ALLOYWASDEVELOPEDSODZ68ALLOYSHOULDHAVEHIGLLTEMPERATURECAPABILITYANDGOODHOTCORROSIONRESISTANCEONTHEBASISOFRENE’142，DZL25LANDDZ38G0M38ALLOYSDZ68WASMADEBYOURSELVESWITHLOWSEGREGATIONNESEGREGATINGLIGHTLYPPHASEFORMINGELEMENTSOFAIANDTAA塢ADDEDINTODZ68FORPRECIPITATIONHARDENINGTHISALLOYHASASMALLAMOUNTOFTIANDNOHFORNBSEGREGATINGSEVERELYELEMENTSHI曲CONTENTSOFREFRACTORYELEMENTSSUCH勰WANDRE眥ADDEDFORSOLIDSOLUTIONSTRENGTHENINGANDHIP血CRCONTENTISADDEDINTODZ68FORHOTCOITOSIONRESISTANCEN屺HEATTREATMENTOFDZ68ISCOMPOSEDOFPRIORHOMOGENEOUSLREATMENTSOLIDSOLUTIONTREATMENTANDTWOAGINGTREATRNENTSTHEWHOLEHEALTREATMENTASFOFLOWS1240℃／05HRS1260℃／05HRS1280℃／2HRSAIRC0011120℃／4HRSONEHOURCOOITO1080℃1080℃／4HRSAIRCOOL，900℃／4HRSAIRC001MECHANICALPROPERTIESOFDZL25，DZ38GANDDZ68一LALLOYSAFTEREACHHEATTREATMENTHAVEBEENCOMPAREDINTHISPAPERTHCRUPTURECONDITIONSAIEINTHEC螄SOF980℃／235MAAND980℃／245M腿低HOTCORROSIONRESISTANCESOFDZL25LDZ38GANDIZ68一LALLOYSHAVEBEENCOMPAREDATTHECONDITIONSOF900℃AND75％NAZSOT十25％NACLMOLTENSALT11”MECHANICALLYEXPERIMENTALRESULTSSHOWTHATTHEMECHANICALPROPERTIESOFDZ681ARHIG虹BECAUSETHE1一VOLUMEFACTIONOFDZ681ISABOUT50％ANDITCONTAINSACERTAINAMOUNTSOFWANDRE11艟ROOMTEMPERATURETENSILEPROPERTIESOFDZ681撒SIMILARTODZL25，THEEXTENSIONSTRENGTHANDEXTENSIBILNYOFDZ380ISPOOL111ERUPTUREPROPERTIESOFDZ68LALEEQUIVALENTTODZL25INTHEEXPERIMENTALCAS器ANDBETTERTHANTHATOFDZ38GTHEHOTCORROSIONEXPERIMENTALRESULTSSHOWTHATTHEHOTCORROSIONRESISTANCEOFDZ681ISEQUIVALENTTODZ38GALLOYANDBETTERTHANTHATOFDZL25LINTHISPAPERTHEHOTCORROSIONMECHANISMOFTHRECALLOYSISPREVIOUSLYPROPOSEDTHEBASICDISSOLUTIONMODEL11碓PROCESSESOFTHEIRHOTCORROSIONAREDIFFERENTFURWHICHTHEYHAVEDIFFERENTCOMPOSITIONS，CORROSIVEPRODUCTIONSANDⅡLIC∞蚰ⅫTLL潞DZL25LALLOYISCORRODEDSEVERELYAFTERSHORTTIME；DZ38GALLOYISLOCALLYCORRODEDSERIOUSLYFORITSNONUNIFORMMICROSTRUCTARE；DZ68LALLOYHASA

簡介：南京航空航天大學碩士學位論文CALS技術及其在航空產品維修保障中的應用研究姓名王金偉申請學位級別碩士專業(yè)機械電子工程指導教師樓佩煌200231CALS技術及其在航空產品維修保障中的應用研究ABSTRACTWEAPONSYSTEMSAREBECOMINGTOOCOMPLEXOWINGTOTHEDEVELOPMENTOFSCIENCEANDTECHNOLOGYHOWEVERHIGHTECHWEAPONCANEXERTADVANCEDTECHNOLOGYUNDERHIGHTECHLOGISTICSSUPPORTSYSTEMTHESEARECHALLENGESFORLOGISTICSSUPPORTTECHNOLOGYTHISTHESISFIRSTLYINTRODUCESNEWDEMANDSOFAERIALPRODUCTLOGISTICSSUPPORTUNDERHIGHTECHWARANDSOMEDEFECTSOFTRADITIONALLOGISTICSSUPPORT，ANDPUTSFORWARDAKINDOFSYSTEMMODELOFAERIALPRODUCTLOGISTICSSUPPORTFOLLOWINGDATASHARINGOFCALS，ANDEMPHASIZESIETMSECONDLYITSETSFORTHAPPLICATIONOFSTEPANDXMLINTHEIETM，RESEARCHSCONVERSIONOFXMLSCHEMAANDRELATIONSCHEMA，ANDSIMPLYRESEARCHSMAPPINGOFXMLANDEXPRESSAFTERWORD，ABASEDXMLFRAMEWORKOFINFOTRANSFERBETWEENDIFFERENTPLATFORMAREPRESENTED，ACCORDINGTOTHISFRAMEWORK，THEAUTHORESTABLISHAARCHETYPALSYSTEMOFHELICOPTERINFORMATIONQUERYSYSTEMBASEDXMLANDDBMSINTHEEND，AFTERTHESUMUPOFTHEWHOLEPAPER，SOMEFURTHERRESEARCHESARESUGGESTEDKEYWORDSCALS、LOGISTICSSUPPORT、IETM、STEP、XML、DATABASE。第1I頁

簡介：合肥工業(yè)大學碩士學位論文航空發(fā)動機主軸軸承可靠性技術研究姓名焦育潔申請學位級別碩士專業(yè)機械工程指導教師呂新生張錫昌20040301RESEARCHONRELIABILITYTECHNOLOGYFORMAINSHAFTBEARINGSOFAIRCRAFTENGINETHEMAINSHAFTBEARINGSOFAIRCRAFTENGINEAREKEYPARTSOFPLANEITSRELIABILITYANDLIFEAFFECTDIRECTLYONTHERELIABILITYANDLIFEOFENGINEANDEVENWHOLEPLANETHISPAPERESTABLISHEDASITEDATACOLLECTSYSTEMANDADATAMANAGEMENTSYSTEMFORTHEMAINSHAFTBEARINGSOFAIRCRAFTENGINECOLLECTEDALOTOFDATUMANDFAILURESAMPLESTHROUGHSTATISTICANALYSISOBTAINEDTHEMAJORFAILUREMODELOF廿LEBEARINGSANDITSPRINCIPLEOFFORMATION，ANDPUTSOMESPECIFICMEASURESTHATCANPREVENTBEARINGFROMFAILINGINEARLYSTAGETOIMPROVEITSRELIABILITVWCRESEARCHEDANDESTABLISHEDDATAMODELOFTHESITEDATAFORTHEMAINSHAFTBEARINGSANDAPPRAISEDITSRELIABILITYLIFEBYTHESURVIVINGRATIOMETHODT11EMEANHITCHMETHODANDTHEACCUMULATEDHITCHMETHODTHEMINIMUMSQUAREMETHODWASUSEDINREGRESSINGANALYSISFORTHERESULTOFTREATMENTINASUPPOSEDDIS仃IBUTIONFUNCTION，THE“D”EXAMINATIONMETHODWASUSEDFORWEIBULLDISTRIBUTIONANDINDEXDISTRIBUTION，ANDOBTAINEDTHEDISTRIBUTIONTYPEINTHELIFEOFTILEMAINSHAFTBEARINGS，APPRAISEDTHERELIABILITYLIFE，THEMEANLIFEANDTHERELIABILITYIN500HOURSOF廿1EMAINSHAFTBEARINGSWITILTHEORETICALDISTRIBUTIONFUNCTIONW_ERESEARCHEDTHEPECULIARITYOFTHESMALLANDNOLOSSINE伍CACYSAMPLEBOOKANDESTABLISHED廿LERELIABILITYTESTMETHOD，ADVANCEDACHECKPLANFORRELIABILITVTESTMEETINGASPECIFIEDRELIABILITYREQUIREMENTOFTHEMAINSHAFTBEARINGSTHEIMPROVEDBEARINGSWERETESTEDIN500H。600HAND900H，ANDTHERESULTSOF廿LETESTWEREANALYZEDKEYWORDSMAINSHAFTBEARING，FAILURE，RELIABILITY

簡介：大連理工大學碩士學位論文航空配載與重量平衡計算系統姓名苗森申請學位級別碩士專業(yè)軟件工程指導教師周東清20071125航空配載與重量平衡計算系統THEAIRCRAFTWEIGHTANDBALANCESYSTEMKBSTRACTASONEADVANCODANDMODEMTRANSPORTMODEAIRTRANSPORTHASBEENDEVELOPEDATFULLSPEEDANDFOCUSEDONWIDELYINTHEFIELDSOFINTERNATIONALTRANSPORTATIONANDBECOMESTHEQUICKESTTRANSPORTMODEWHICHGUARANTEESTHEINTERNATIONALTRADEAILOVERTILEWORLDINFUTURETRANSPORTATIONOFINTERNATIONALTRADE，AIRTRANSPORTWILLBECOMEONEOFTHEMOSTIMPORTANTROLESANDEFFECTIVESTRENGTHINMODEMTRANSPORTATION，11艟DEVELOPMENTOFITACCOMPANIEDWITHTHERESEARCHACHIEVEMENTOFAIRCRAFTWEIGHTANDBALANCESUPPLYTHEBASICTILEORYANDTECHNICALSUPPORTDURINGTHEPROCESSOFDEVELOPMENTANDRESEARCHOFAIRCRAFTWEIGHTANDBALANCEPROG舢WEIGHTANDBALANCEISANIMPORTANTPIOCEDUREOFAIRTRANSPORTFILLINGLOADINGSHEETANDWEIGHTBALANCESHEETMANYDATASHOULDBEPROCESSEDWITHTHECHARACTERISTICSOFACCU陽TCCA_LCTFIATIONMUCH】IMITAFIONANDTIGHTTIMETHEAIRCRAFTWEIGHTANDBALANCESYSTEMHELPSS詛FRWORKMOREEFFNCIENTLY。MOREACCURATELYANDMOREINTELLECTUALLYTHEAIRCRAFTWEIGHTANDBALANCESYSTEMISANAPPLICABLEMODULEOFCOMPUTERDEPARTURESYSTEMANDMAINLYUSEDBYSTAFFOFAIRLINESANDAIRCARGOTERMINALSITCANBEUSEDEITHERACCOMPANIEDBYTHEOTHERSYSTEMORALONEWEIGHTANDBALANCINGISTHENECESSARYPROCEDUREBEFOREDEPARTURETHESTAFFOFWEIGHTANDBALANCEDEPARTMENTSHOULDCONSIDERALLKINDSOFFACTORSWHICHINFLUENCETHEBALANCEOFAIRCRAFTTHENDECIDETHESCALLEI“OFLOADINGANDCHEEKIFTHEWEIGHTANDCENTEROFGRAVITYISWITHINTHEREGULATEDLIMITATIONAFTERGETTINGTHERELEVANTAIRCRAFTDATAWEIGHTANDBALANCINGALSOCANBEPROCESSEDBYMATLPOWERBUTIT’SVERYCOMPLICATEDANDEASILYAFFECTEDBYARTIFICIALFACTORSWHICHRESULTINEITORSMEANWHILETHESPACEANDMAXIMUMLOADOFCABINETCAN’TBEUSEDSUFFICIENTLYTRADITIONALWEIGHTANDBALANCINGCALLONLYUSE50％SPACEAND70％LOADING，THECOMPUTERSYSTEMANDMANPOWERJOBFOLLOWTHESAMEFLOW，ESTABLISHCOMPLETEOUTBOUNDCARGODATABASE，PUTTHECARGOINORDERACCORDINGTOLIMITATIONSANDCHOOSETHEBESTCOMMODITYFORTHEOTHERCONSIDERINGTHESPACEANDLOADINGUSAGE，INTELLECTUALWEIGHTANDBALANCESYSTEMHELPSBALANCINGDEPARTMENTGAINHIGHE伍FICIENCY，ACCURACYANDBENEFITKEYWORDSAIRTRANSPORT；WEIGHT；BALANCING；CENTEROFGRAVITYII

簡介：中圖分類號V355論文編號102870715S033學科分類號082303碩士學位論文機場航空器滑行路徑優(yōu)化技術研究研究生姓名陳浩學科、專業(yè)交通運輸規(guī)劃與管理研究方向空中交通流量管理指導教師王湛講師南京航空航天大學研究生院民航學院二О一五年三月NANJINGUNIVERSITYOFAERONAUTICSANDASTRONAUTICSTHEGRADUATESCHOOLCOLLEGEOFCIVILAVIATIONRESEARCHONOPTIMIZATIONTECHNIQUESOFAIRPORTAIRCRAFTTAXIPATHATHESISINTRANSPORTATIONPLANNINGANDMANAGEMENTBYCHENHAOADVISEDBYLECTURERWANGZHANSUBMITTEDINPARTIALFULFILLMENTOFTHEREQUIREMENTSFORTHEDEGREEOFMASTEROFENGINEERINGMARCH,2015

簡介：分類號丁厶妨6密級公哥⑧單位代碼10422學號汐IITL啦∥戶茹只番SHANDONGUNIVERSITY碩士學位論文THESISFORMASTERDEGREE論文題目理干I，厶夠虢空綴硼扔同型復件1刀崗I『毅捐承使鉑哥友％娜伽七叫％一冬耐～矗擁，，N，D如桫手FE肌幣廠負P場P凹躐Q尸；C反F戶R千5作者姓名與；鳴肆培養(yǎng)單位盤煎查塞鱟I魚專業(yè)名稱札樹釧刪自動億指導教師畝L埔緩教授合作導師≯T峰年F月≥。日原創(chuàng)性聲明本人鄭重聲明所呈交的學位論文，是本人在導師的指導下，獨立進行研究所取得的成果。除文中已經注明引用的內容外，本論文不包含任何其他個人或集體已經發(fā)表或撰寫過的科研成果。對本文的研究作出重要貢獻的個人和集體，均己在文中以明確方式標明。本聲明的法律責任由本人承擔。論文作者簽名皇道益日期X堅苧里關于學位論文使用授權的聲明本人完全了解山東大學有關保留、使用學位論文的規(guī)定，同意學校保留或向國家有關部門或機構送交論文的復印件和電子版，允許論文被查閱和借閱；本人授權山東大學可以將本學位論文的全部或部分內容編入有關數據庫進行檢索，可以采用影印、縮印或其他復制手段保存論文和匯編本學位論文。保密論文在解密后應遵守此規(guī)定論文作者簽名墨絲壟導師簽名

簡介：西北工業(yè)大學碩士學位論文航空有機玻璃疲勞裂紋特性的試驗研究姓名賈敬華申請學位級別碩士專業(yè)固體力學指導教師李亞智20060301西北工業(yè)太學碩士學位論文ABSTRACTPOLYMETHYLMETHACRYLATEPMMAHASBEENWIDELYUSEDASTHETRANSPARENTMATERIALOFTHEAIRCRAFTCANOPIESBECAUSEOFITSPROPERTIESOFEXCELLENTTRANSPARENCYANDSTRENGTHTHEUNDERSTANDINGTOITSFATIGUEBEHAVIOURISONEOFTHEKEYPARISOFTHEFATIGUELIFEPREDICTIONOFAIRCRAFTSTRUCTURESYBMD3PMMAHASBEENUSEDINSEVERALCHINESEAIRCRAFTTYPESASTHECANOPYTRANSPARENTSTRUCTURALMATERIALSINORDERFORUSINGTHEMATERIALSAFELYANDECONOMICALLYITISOFENGINEERINGSIGNIFICANCETOSTUDYTHERESPONSEOFTHEKINDOFDAMAGECONTAINEDMATERIALSANDSTRUCTURESWITHSTANDINGSERVICELOADINGQUANTITATIVELYANDTODEVELOPCORRESPONDINGANALYTICALTECHNIQUESTHEMAINPURPOSEOFTHISDISSERTATIONISTOCHARACTERIZEITSFATIGUECRACKPROPAGATIONBEHAVIOUREXPERIMENTALLY，ANDTHEREBYTOOFFERBASISTOTHEEVALUATIONOFTHERESIDUALLIFEANDTHEMAINTENANCEGUIDELINEOFCANOPYSTRUCTURESANEXPERIMENTALSTUDYOFSTABLEFATIGUECROCKPROPAGATIONBEHAVIORWASCARRIEDOUTATROOMTEMPERATUREDURINGTHEPREPARATIONOFINITIALTHROUGHFATIGUECRACKSFORMTSPECIMENS，LOADCYCLESWITHCOMPRESSIVEPORTIONDEMONSTRATESBERERQUALITYTHANUSUALTENSIONTENSIONLOADINGTHEFATIGUECROCKPROPAGATIONRATEINPARIS’SREGIONFORCERTAINLOADRATIOSHOWSGOODCORRELATIONWITHASTRAIGHTLINEINDOUBLELOGARITHMICDA／DN△KCOORDINATETHEDAMNANDTHESLOPEOFTHESTRAIGHTLINEINCREASESWITHTHEINCREASEOFLOADRATIOFORTHENEGATIVELOADRATIOS，HOWEVERTHECOMPRESSIVEPORTIONINLOADCYCLESACCELERATESTHECRACKGROWTHAPROPERFORMULATIONTOTHESEEFFECTSISUNAVAILABLETHEN，THEWALKER’SEQUATIONWASDRAWNUPFORTHEPOSITIVELOADRATIOS，AMODIFIEDWALKER’SEQUATIONISDEVELOPEDANDGIVESAGOODREGRESSIONTOTHEBEHAVIOROFTHEPMMAMATERIALWHILEFORTHENEGATIVELOADRATIOS，THECOMPRESSIVEPORTIONINLOADCYCLESACCELERATESTHECRACKGROWTHOFTHEPMMATHEINFLUENCEOFTHECOMPRESSIVEPORTIONOFTHELOADCYCLESONTHEFATIGUECRACKPROPAGATIONRATEFCPRMAYBEINTERPRETEDBYTHEPLASTICITYINDUCEDCRACKCLOSUREPHENOMENONANDAPROPERFORMULATIONISSOFARUNAVAILABLE1I

簡介：中國民用航空學院碩士學位論文摘要論文緊密結合航空發(fā)動機維修中的實際問題，對維修過程中的裝配間隙對發(fā)動機性能的影響進行統計分析，介紹了多元線性回歸的基本理論和方法，重點分析了發(fā)動機裝配間隙對風扇壓氣機和渦輪性能的影響。論文完成以下主要工作T收集了AMECO近年來維修的PW4000發(fā)動機的裝配間隙數據和試車數據，并對數據進行整理，以此作為統計分析的依據2用相關分析和逐步回歸方法選擇那些對發(fā)動機性能有重要影響的間隙，將選出來的間隙與EGT建立多元線性回歸模型和多元非線性回歸模型，通過計算以及對回歸模型的檢驗后，給出兩種模型下的擬合效果圖，繪出EGT隨間隙變化的性能曲線圖，最后還分別用兩種模型進行預測，得到合理的結果3通過逐步回歸方法選擇對發(fā)動機其余的性能參數如N2NT和WF有重要影響的間隙，將這些選出來的間隙與三個性能參數建立多元非線性回歸模型，通過計算和對回歸模型的檢驗后，給出在該模型下的擬合效果圖，繪出三個性能參數隨間隙變化的性能曲線圖，最后還分別用該模型對四個樣本進行預測，得到合理的結果4用逐步回歸方法選擇出對發(fā)動機的推力有重要影響的間隙，并建立間隙與推力之間的多元線性回歸模型并通過該模型進行預測，得到合理的結果結合課題工作，論文利用VC和ODBC數據庫開發(fā)了應用程序，通過該程序可以對EGT等航空發(fā)動機性能參數進行了分析，為評估、預測裝配間隙對發(fā)動機性能影響提供了參考，為以后發(fā)動機維修提供參考和指導。關鍵詞航空發(fā)動機間隙性能分析多元回歸分析一一一一一一一一一一一一絲韭遇碩士學位論文ACCORDINGTOTHEACHIEVEMENTOFTHEPROJECTANAPPLICATIONPROGRAMISDEVELOPEDBYVCLANGUAGEANDODBCDATABASESUCHPROGRAMCANBEUSEDTOANALYZETHEPERFORMANCEPARAMETERSSUCHASEGTN2N1ANDWEITALSOCANGIVESOMEREFERREDADVICEOFMAINTENANCEWHENTHEINFLUENCETHATTOLERANCECLEARANCESAFFECTEDAEROENGINEPERFORMANCEISESTIMATEDANDFORECASTEDKEYWORDAEROENGINETIPCLEARANCEPERFORMANCEMULTIREGRESSIONM

簡介：全日制碩士學位論文航空鋁合金零件銑削航空鋁合金零件銑削三維三維殘余應力殘余應力模型模型研究研究THERESEARCHOFTHREEDIMENSIONALMODELOFRESIDUALSTRESSOFAVIATIONALUMINUMALLOYPARTSONMILLING申請人姓名王明杰指導教師高國富教授學位類別工學碩士專業(yè)名稱機械工程研究方向精密超精密加工技術與裝備河南理工大學機械與動力工程河南理工大學機械與動力工程學院學院二0一四年六一四年六月中圖分類號中圖分類號TG506密級級公開公開UDC621單位代碼單位代碼10460航空鋁合金零件銑削三維殘余應力模型研究THERESEARCHOFTHREEDIMENSIONALMODELOFRESIDUALSTRESSOFAVIATIONALUMINUMALLOYPARTSONMILLING申請人姓名申請人姓名王明杰王明杰申請學位申請學位工學碩士工學碩士學科專業(yè)學科專業(yè)機械工程機械工程研究方向研究方向精密超精密精密超精密加工加工技術與裝備技術與裝備導師導師高國富高國富職稱職稱教授教授提交日期提交日期201464答辯日期答辯日期20146河南理工大學

簡介：廣西大學碩士學位論文航空鋁合金的沖擊韌性研究姓名王力軍申請學位級別碩士專業(yè)材料加工工程指導教師曾建民20050501廣西大學碩士學位論文航空鋁合金的沖擊韌性研究力集中影響，先減小后增大，縱向中面等效應力近乎不變，最大等效應力出現在缺口根部；標準缺口應力集中系數KT是時間的函數，隨時間的增加，KT緩慢增大后又緩慢減小，其中夏氏U型與夏氏鑰匙型變化近似重合，應力集中系數最小，梅式U型次之，夏氏V型最大；標準缺口試樣對缺口根部達到斷裂的響應時間不同，夏氏V型最快，其次是梅氏U型和夏氏U型，夏氏鑰匙型最慢。2缺口的外形尺寸對于缺口根部應力分布具有較大的影響，缺口越深，曲率半徑越小，缺口側邊夾角越尖銳，缺口根部區(qū)域應力越集中，缺口頂端的曲率半徑影晌作用最大，側邊角和缺口深度起次要作用。3根據計算結果設計了刀切I型缺口沖擊試樣，充分強化材料本身的應力狀態(tài)，大大提高了用沖擊試驗方法檢驗高韌性材料本身缺陷的敏感性。4當裂紋擴展功遠大于裂紋萌生功時，試樣處于韌性斷裂狀態(tài)，反之處于脆性斷裂狀態(tài)，航空鍛造鋁合金LD2鋁合金的塑性變形能和裂紋失穩(wěn)擴展能之和遠大于彈性變形能，證實航空鍛造LD2鋁合金是高塑性合金，采用常規(guī)沖擊方法一夏比CHARPYV型缺口沖擊試驗檢驗其材料具有一定的局限性。5不同含氫量下的不同類型試樣的沖擊韌性值存在明顯差異，刀切I型缺口沖擊試樣對氮最為敏感，而氫含量在0．1ML_／1009左右，無缺口試樣更為實用。6隨著合金氫含量的增加，其不同缺口形式的沖擊試樣沖擊韌性值呈不同速度增長；沖擊韌性值的大小較大程度上與氫存在的形態(tài)和分布II

簡介：南京航空航天大學碩士學位論文航空金屬塊體材料電子散射與納米碳管相關力學問題的計算模擬姓名陳裕申請學位級別碩士專業(yè)飛行器設計指導教師沈海軍20070301航空金屬塊體材料電子散射與納米碳管相關力學問題的計算模擬IIABSTRACTTHETHESISCONTAINSTWOPARTS,IE,PART1MONTECARLOSIMULATIONSONELECTRONSSCATTERINGINAERONAUTICMETALMATERIALSANDPART2MDMOLECULARDYNAMICSSIMULATIONSOFTHEMECHANICALPROPERTIESOFCNTCARBONNANOTUBEANDCARBONNANOPEAPODSPART1MONTECARLOSIMULATIONSONELECTRONSSCATTERINGINAERONAUTICMETALMATERIALSAL,TI,ANDMGALLOYSHAVEMANYEXCELLENTPROPERTIES,SUCHASHIGHSTRENGTH,LIGHTWEIGHTANDANTICORROSION,ANDAREWIDELYUSEDINENGINEERINGSTRUCTURESOFAERONAUTICSCARBONNANOTUBE,COLLISION,CARBONPEAPOD,MULTIWALLED,SINGLEWALLED,MOLECULARDYNAMICS,NE

簡介：南京航空航天大學碩士學位論文航空高溫材料三維蠕變斷裂研究姓名于振波申請學位級別碩士專業(yè)工程力學指導教師郭萬林20090301航空高溫材料三維蠕變斷裂研究IIABSTRACTINAERONAUTICASTRONAUTICCHEMICALPOWERFIELDSMANYINDUSTRIALACCIDENTSHAVEBEENREPTEDONCOMPONENTS’FAILUREUNDERHIGHTEMPERATURESURVEYSINDICATEDTHATTHEFAILURESARECLOSELYCRELATEDWITHTHEDEFECTSFLAWSINTHECOMPONENTSMOSTOFTHEFAILURESRESULTEDINTHEGROWTHOFTHECREEPCRACKSINCE1970SWIDERESEARCHESHAVEBEENCONDUCTEDINTWODIMENSIONAL2DCREEPFRACTUREINTEGRATEDCRITERIONSWEREDEVELOPEDTOGUIDETHEDESIGNOFCOMPONENTSHOWEVERTHESTRONGTHREEDIMENSIONAL3DEFFECTSOFTENOCCURWHENTHEYAREAPPLIEDTOCOMPLEXSTRUCTURESALTHOUGHTHEREAREALOTOFNUMERICALEXPERIMENTALRESEARCHESON3DCREEPFRACTUREATHEETICALBASEISABSENTSOFARINTHEPRESENTTHESISWEFOCUSEDONTHETHEETICALNUMERICALRESEARCHESIN3DCREEPFRACTURETHEMAINCONTENTSAREASFOLLOWING1THEGENERALSINGULARITYSTRUCTUREOF3DCREEPCRACKBDERFIELDSISOBTAINEDWHICHISSUITABLETOBOTHSTRAIGHTCURVILINEARCRACKSTHEGOVERNINGEQUATIONOF3DCREEPCRACKISEXTRAPOLATEDSOLVEDEXACTLYTHERESULTSGIVETHESINGULARITYANGULARDISTRIBUTIONSOFTHESTRESSSTRAINRATEFIELDSWHICHAREAFFECTEDBYTHETRIAXIALSTRESSCONSTRAINTTZSTRONGLYAPROGRAMISWRITTENBYCLANGUAGEFTHESOLVINGPROCEDURE2UNDERREMOTEUNIFMTENSILELOADISOTROPICCREEPINGTHINPLATEWITHSINGLEEDGETHROUGHSTRAIGHTCRACKISINVESTIGATEDANALYZEDUSING3DFINITEELEMENTMETHODTHEDISTRIBUTIONSOFCINTEGRALTHETRIAXIALSTRESSCONSTRAINTFACTTZARESHOWNATWOPARAMETERCTZDEIONWHICHISMEEXACTACCURATEISPROPOSED3BASEDONTHETHEETICALNUMERICALSTUDIESABOVETHESTEADYSTATECREEPCRACKGROWTHOF3DISSTUDIEDPRIMARILYA3DTWOPARAMETERCRITERIONBCTISSUGGESTEDTOCONSIDERTHEEFFECTOFTRIAXIALSTRESSCONSTRAINTTZCOMPARISONOFTHEBCTPREDICTIONWITHTHEEXPERIMENTSDATAAFFIRMITSEFFECTIVITYKEYWDSCREEPFRACTUREMECHANICS3DCRACKBDERFIELDSTIAXIALSTRESSCONSTRAINTFACTTZSTEADYSTATECREEPCRACKGROWTHTWOPARAMETER3DCREEPFRACTURECRITERION

簡介：中國民航大學碩士學位論文航空AES數字接收機關鍵技術的研究與實現姓名姚彬申請學位級別碩士專業(yè)通信與信息系統指導教師吳志軍20070308中國民航大學碩士論文ABSTRACTTHESOFTWAREDEFINEDRADIOTECHNIQUEISAKINDOFNEW1CADINCOMMUNICATIONTECHNIQUECAUSEDTHETECHNICALINNOVATIONOFRECEIVERBYMEANSOFTHESOFTWAREDEFINEDRADIOS，ITISBETTERTOMAKETHEA／D、D／ACLOSERTOTHEANTENNA，ANDPROCESSINGTHESIGNALINTHEDIGITALDOMAINANYCOMMUNICATIONFUNCTIONWILLBEPERFORMEDINTHESALNEHARDWAREPLATFORMTEALIZEDIFFERENTFUNCTIONBYCHOOSEDIFFERENTBLOCKOFSORWARESOFTWAREDEFINEDRADIOCALLCOMMUNICATEWITHTHESTATIONOFOLDSYSTEMBECAUSEITCANFORMALLKINDSOFMODULATEUNDEEANDPROTOCOL，THISCANPROLONGTHECYCLEOFTHESTATIONANDSOREDUCETHECOSTSOTHESOFTWAREDEFINEDRADIOHASABRIGHTFOREGROUNDINTHECOMMUNICATIONFIELD，ESPECIALLYINTHEMOBILECOMMUNICATIONFIELDDUETOTHELIMITATIONOFDEVICELEVEL，ITISIMPOSSIBLETOSAMPLERFSIGNALSOITISAVALIDWAYTOSAMPLEIFSIGNALTEALIZETHESOFTWAREDEFINEDRADIECEIVERTHIS燁RFIRSTDISCUSSTHECOMPOSINGOFAVIATIONSYSTEMICFORINMARSATANDCHANNELTYPES，ANDANALYZESPECIALTYTHEBASEFRAMEWORKANDTHEKEYTECHNIQUESOFTHESOFTWAREDEFINEDRADIOCOMBININGPCHANNELPROPTECHNICALGUIDELINESANDRESEARCHINGONTHEPRACTICALAPPLICATIONSINIFDIGITALRECEIVERTHISPAPERPUTFORWARDAKINDOFBROADBANDIFDIGITALRECEIVERDESIGNOFTHEAVIATIONAESWITHTHESOFTWAREDEFINEDRADIOTHESTUDYOFTHISPAPERPLACESEMPHASISTWOKEYTECHNIQUESTHEBLOCKOFSIGNALPROCESSINGINTHEIFANDTHESYNCHRONIZATIONOFCARRIERTHESIGNALPROCESSINGINTHEIFGIVESSPECIALDETAILSOFALGORITHMANALYSISANDREALIZESTECHNIQUESINADCANDDDC，ANDCARRIERSYNCHRONIZATIONANALYSETHESYNCHRONIZATIONALGORITHMOFCARRIERFREQUENCYANDPHASEANDGIVETHEIMPLEMENTATIONINFPGA，INCLUDINGSTRUCTUREDIVISIONHARDWAREDESIGNANDLOGICSYNTHESISKEYWORDSSOFTWAREDEFMEDRADIO；DIOTALIF；ANALOGTODIGITALCONVERTER；DIGITALDOWNCONVERTER；CARRIERRECOVER；FIELDPROGRAMMABLEGATEARRAYⅡ

簡介：西北工業(yè)大學碩士學位論文航空典型結構材料腐蝕行為與控制的研究姓名田莉莉申請學位級別碩士專業(yè)材料學指導教師劉道新20060301懋熬王鼗太學鞭士學位論文擒要舞蔥黼度爵嚏疆離簸臺耢攀在櫥媲除段豹蔽瀑速率，壤大穩(wěn)霸啜灄零。夜35℃～70。|C試驗溫發(fā)范圍內，復臺張料的吸瀑特性遵從FICK定攆。在3S℃澄淡下燕熱簿黥瓣禱滲夫了簸合耪旗在襁貽滁段戇蹶漫遵率巍飽積暇滋搴，并盈藤藤瀚耷趣載薅熬大，復合稀瓣奩鞠戇除袋鶼啜淹速率穗這戮平掇辯鶼讖秘蔽滋攀越丈。河瓣，暖澄健復合襯褥的承裁熊力翳囂降低。關鍵溺摟憋褰鑣，不臻鑲，裔強浚鑲，怒舞懿畿鑲，鍰會壘，簸紓雄壤溪環(huán)氟復合櫥黼，敷漫，娥鑲，磷豫L