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簡(jiǎn)介:無(wú)線傳感器網(wǎng)絡(luò)WIRELESSSENSWKWSN作為一種由大量節(jié)點(diǎn)組成的新型傳感網(wǎng)絡(luò),具有應(yīng)用廣泛、快速部署的優(yōu)良特性。隨著信息行業(yè)和信息處理技術(shù)的迅猛發(fā)展,無(wú)線傳感器網(wǎng)絡(luò)的應(yīng)用開(kāi)始逐漸普及,其中在環(huán)境檢測(cè)、能源勘探、農(nóng)業(yè)生產(chǎn)和生物研究等方面有著良好的應(yīng)用前景。拓?fù)淇刂剖菬o(wú)線傳感器網(wǎng)絡(luò)研究的核心問(wèn)題之一,合理的網(wǎng)絡(luò)拓?fù)浣Y(jié)構(gòu)能夠延長(zhǎng)網(wǎng)絡(luò)生存周期,減少節(jié)點(diǎn)間相互干擾并提高路由協(xié)議效率。無(wú)線傳感器網(wǎng)絡(luò)規(guī)模較大,傳感節(jié)點(diǎn)眾多,并且節(jié)點(diǎn)能量有限,因此,為了確保信息傳輸?shù)目煽啃?,無(wú)線傳感器網(wǎng)絡(luò)必須具有較強(qiáng)的容錯(cuò)性。本文從網(wǎng)絡(luò)節(jié)能的角度出發(fā),對(duì)無(wú)線傳感器網(wǎng)絡(luò)進(jìn)行容錯(cuò)拓?fù)淇刂蒲芯?,針?duì)LEACH算法的缺點(diǎn)進(jìn)行了改進(jìn),并設(shè)計(jì)仿真實(shí)驗(yàn)進(jìn)行驗(yàn)證。主要研究工作及取得的創(chuàng)新性成果如下首先,分別從網(wǎng)絡(luò)節(jié)點(diǎn)和網(wǎng)絡(luò)結(jié)構(gòu)兩個(gè)方面對(duì)網(wǎng)絡(luò)的能耗進(jìn)行了分析;對(duì)路由節(jié)能進(jìn)行了研究,分析各路由協(xié)議的特點(diǎn);選取典型的路由協(xié)議LEACH協(xié)議為研究對(duì)象,分析LEACH算法的計(jì)算流程,并設(shè)計(jì)仿真實(shí)驗(yàn),對(duì)LEACH協(xié)議的性能進(jìn)行分析。然后,針對(duì)LEACH算法能量分布不均的缺點(diǎn),提出了基于一種基于自適應(yīng)讓位策略的改進(jìn)算法,通過(guò)設(shè)定一個(gè)能量門(mén)限來(lái)限定簇頭的選擇,和LEACH算法相比該算法能夠獲得更長(zhǎng)的網(wǎng)絡(luò)壽命,并且提高了網(wǎng)絡(luò)的吞吐量。最后,從功率控制的角度出發(fā),提出了一種基于遺傳算法的LEACH改進(jìn)方案,該算利用節(jié)點(diǎn)位置信息及節(jié)點(diǎn)剩余能量對(duì)網(wǎng)絡(luò)進(jìn)行分簇,綜合考慮簇內(nèi)節(jié)點(diǎn)剩余能量、簇內(nèi)覆蓋率和重復(fù)覆蓋面積等因素對(duì)簇內(nèi)節(jié)點(diǎn)進(jìn)行睡眠調(diào)度,使拓?fù)浣Y(jié)構(gòu)得到進(jìn)一步優(yōu)化。通過(guò)仿真實(shí)驗(yàn)對(duì)兩種改進(jìn)算法從網(wǎng)絡(luò)壽命、節(jié)點(diǎn)剩余能量和吞吐量三個(gè)方面進(jìn)行了對(duì)比分析。
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簡(jiǎn)介:工學(xué)碩士學(xué)位論文神經(jīng)網(wǎng)絡(luò)技術(shù)在衛(wèi)星故障預(yù)測(cè)中的應(yīng)用研究曾慶偉哈爾濱工業(yè)大學(xué)2006年6月CLASSIFIEDINDEXTP206V47UDC6815629783DISSERTATIONFTHEMASTERDEGREEINENGINEERINGAPPLICATIONOFNEURALWKTECHNIQUESINFAULTPREDICTIONOFSATELLITECIDATEZENGQINGWEISUPERVISPROFJIANGXINGWEIACADEMICDEGREEAPPLIEDFMASTEROFENGINEERINGSPECIALTYSPACECRAFTDESIGNAFFILIATIONDEPARTMENTOFASTRONAUTICSENGINEERINGDATEOFDEFENCEJUNE2006DEGREECONFERRINGINSTITUTIONHARBININSTITUTEOFTECHNOLOGY
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簡(jiǎn)介:西北工業(yè)大學(xué)碩士學(xué)位論文基于BS的工裝網(wǎng)絡(luò)化設(shè)計(jì)技術(shù)研究姓名田榮華申請(qǐng)學(xué)位級(jí)別碩士專業(yè)航空宇航制造工程指導(dǎo)教師王仲奇20040301西北工業(yè)大學(xué)碩L學(xué)位論文ABSTRACTABSTRACTNETWORKEDMANUFACTURINGWILLBEATRENDIN21CENTURYANDTHETECHNOLOGYOFNETWORKEDMANUFACTURINGRESOURCESHAREHASBEENAHOTSPOTRECENTLYITWILLHELPENTERPRISESRESPONSETOTHEMARKETQUICKLYACCORDINGTOTHERESEARCHPROJECTNAMEDGUANZHONGNETWORKEDMANUFACTURINGSYSTEMTHECOMPUTERAIDEDNETWORKEDDESIGNTECHNOLOGYBASEDONBSMODEWILLBESTUDIEDTOREALIZEMANUFACTURINGRESOURCESHAREINTHISDISSERTATIONNETWORKEDINFORMATIONRELEASINGTECHNOLOGYWASAPPLIEDTOPARTDESIGNINCADSYSTEMBROUGHTFORWARDANEWTHREEDIMENSIONALMODELINGMETHODBYNETWORKEDPARAMETERDRIVEONTHEBASISOFSTUDYINGDATAINTEGRATIONTECHNIQUEONNETWORKEDTHREEDIMENSIONALMODELINGTHEDATAONWEBWASINTEGRATEDTOCADSYSTEMTOREALIZEMULTITHREADINGDATAEXCHANGEBETWEENWEBINFORMATIONRELEASINGSYSTEMANDCADSYSTEMWHICHWILLMAKECAISYSTEMGETTHEDATAONWEBTHENNETWORKEDTHREEDIMENSIONALMODELINGWILLBEREALIZEDBYPARAMETERDRIVE,ANDAPROVEDMODELBASEDONCATIAWASPROVIDEDINTHISDISSERTATIONDATABASETECHNOLOGYWASAPPLIEDTOPARTLIBRARYSYSTEMANDDYNAMICEXPANSIONBASEDONPARTLIBRARYWASREALIZEDTHISDISSERTATIONWILLHAVESOMEAPPLICATIONVALUEINNETWORKEDDESIGNANDMANUFACTURINGINSOMEAREAORSPECIALTRADEKEYWORDSNETWORKEDMANUFACTURINGTHREEDIMENSIONALMODELINGPARTLIBRARY矛R
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簡(jiǎn)介:西北工業(yè)大學(xué)碩士學(xué)位論文基于神經(jīng)網(wǎng)絡(luò)技術(shù)的空中交通安全問(wèn)題研究姓名田八林申請(qǐng)學(xué)位級(jí)別碩士專業(yè)交通運(yùn)輸規(guī)劃與管理指導(dǎo)教師葉正寅20050301NWPUMASTERSDISSERTATIONSABSTRACTABSTRACTTHISPAPERGENERALLYDESCRIBESPROBLEMSOFTRAFFICSAFETYABOUTTHECIVILAVIATIONANDMULTIPLEUAVSUNMANNEDAIRVEHICLESFORMATIONFLIGHTSUMSUPBASICRESEARCHDIRECTIONSFORTHEAIRTRAFFICSAFETYGENERALLYDESCRIBESSOMEPROBLEMSABOUTFORMATIONFLIGHTOFUAVANDINTRODUCESSWARMPLANOFTHEUSNAVYSPECIALLYTODIFERFROMTHECONCEPTOFMULTIPLEUAVSFORMATIONFLIGHTTHISPAPERPRESENTSTHEFREEDOMFORMATIONFLIGHTSTUDIESTHETRACKPREDICTIONANDCOLLISIONAVOIDINGBETWEENTWOVEHICLESOFMULTIPLEUAVSFORMATIONFLIGHTANDPRESENTSCONTINUOUSFUZZYCONTROLBASEDONNEURALNETWORKITGIVESONESTEPPREDICTIONOFASSUMEDNEURALNETWORKINTHISSTUDYMATLABTOOLBOXOFLINEARNEURALNETWORKTRACKSBYISUSEDTOPREDICTBEELINEANDCURVETRACKTHERESULTSINDICATEITSEFECTIVENESSBEFOREAPPLYINGTHECOMPENSATORYFUZZYNEURALNETWORKWEESTABLISHSEVENLEVELFUZZYRULECOMBININGTHEORYKNOWLEDGETHEVEHICLESVARIETYRATIOOFRELATIVEDISTANCEANDANGLEOFRELATIVEPOSITIONAREDEALTWITHSEVENLEVELFUZZYRULEANDTRAINEDBYCOMPENSATORYFUZZYNEURALNETWORKAFTER178STEPSTRAININGOUTPUTSOFTHENETWORKREACHESTHEGOALPRECISIONINTHECHAPTER5THETRAINEDFUZZYRULEISCONFIRMEDBYTHEDATAADDINGRANDOMNOISETHERESULTSHOWSTHATCOMPENSATORYFUZZYNEURALNETWORKCANRESPONDTHETRENDOFTHEORYVARIETYINTHEENDTHEPAPERPRESENTSTHEFURTHERRESEARCHDIRECTIONKEYWORDSAIRTRAFFICSAFETYFUZZYTHEORYFUZZYCONTROLFUZZYNEURALNETWORKCOMPENSATORYFUZZYNEURALNETWORKUAVUNMANNEDAIRVEHICLESFORMATIONFLIGHT
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簡(jiǎn)介:電子科技大學(xué)碩士學(xué)位論文空天地一體化網(wǎng)絡(luò)抗毀技術(shù)與TCP協(xié)議的研究姓名石幼瑩申請(qǐng)學(xué)位級(jí)別碩士專業(yè)通信與信息系統(tǒng)指導(dǎo)教師虞紅芳20080501ABSTRAL0TABSTRACTBASEDONTHEPROMINENTDEMANDOFCONSTRUCTINGANINTEGRATEDNETWORK,HENCEEXPANDINGINTERNETTOSPACE,WEINVESTIGATEDTHEOUTLINEOFINTEGRATEDSPACEGROUNDNETWORKSYSTEMANINTEGRATEDSPACEGROUNDNETWORKSYSTEMISMAINLYCOMPOSEDOFSPACESEGMENTANDTERRESTRIALSEGMENTCONNECTEDBYGATEWAYLINKSTHISSTRUCTURECOULDPROVIDEHI曲CAPACITY/HIGHTHROUGHPUTANDHIGHLYRELIABLEGLOBALADDRESSABILITYATTHECOSTOFHIGHPROPAGATIONDELAYANDEXPENSIVECONSTRUCTIONCOSTINTHISPAPERWEFOCUSEDONIMPROVINGSURVIVABILITYTOGETHERWITLLINTEGRATEDRESOURCEOPTIMIZATIONANDTHEAPPLICATIONOFSTANDARDNETWORKPROTOCOLSINTHEINTEGRATEDSPACEGROUNDNETWORKSYSTEMINSPITEOFITSBANDWIDTHLIMITANDCOMPARATIVELYLOWSURVIVABILITY,GATEWAYLINKWHICHCONNECTSGROUNDSTATIONSWITHSPACECRAFTISSTILLTHEONLYWAYTOSUPPORTSPACESEGMENTANDTERRESTRIALCOMPONENTCOMMUNICATIONASINGLELINKFAILUREMAYLEADTOTHEFAILUREOFALLTHETRAFFICTRAVERSINGTHELINK,ANDRESULTSINSIGNIFICANTLOSSHENCEWEINTRODUCEAKINDOFPROTECTIONTOENHANCEFAULTTOLERANCEOFOURNETWORKSOMEEXTRABANDWIDTHTOEVERYGROUNDSTATIONISPROPERLYASSIGNEDASTHEBACKUPBANDWIDTHFORSOMEGROUNDSTATIONELSETHUSWECOULDPRESERVESOMETRAMCWHILESOMEOFTHEGATEWAYLINKSFAILEDWEALSOPROPOSEDAHEURISTICALGORITHMOFOPTIMIZEDSHAREDPROTECTIONANDBANDWIDTHASSIGNMENTOSPBAALGORITHMTHESIMULATIONSHOWTHATOURSCHEMECOULDGREATLYIMPROVEINTEGRATEDRESOURCEUTILIZATIONRATIOTOPROVIDEGLOBALADDRESSABILITYANDSTANDARDNETWORKPROTOCOLSANDAPPLICATIONSFORFUTURESPACEMISSIONS,WEINTRODUCEDWORKBEINGDONEBYTHEOPERATINGMISSIONSASNODESONTHEINTEMETOMNIPROJECTTODEMONSTRATETHEAPPLICATIONOFINTERACTCOMMUNICATIONTECHNOLOGIESTOSPACECOMMUNICATIONDUETOTHEEFFECTSOFLONGPROPAGATIONDELAYSANDHI曲LINKERRORRATES,CURRENTTCPPROTOCOLSOVERIPBASEDNETWORKSINSPACECOULDNOTACHIEVEACCEPTABLETHROUGHPUTPERFORMANCETHUSINTHISPAPERWEINTRODUCEDANEWCONGESTIONCONTROLSCHEMECALLEDTCPPEACH,WHICHWASSPECIALLYDESIGNEDFORLINKSWITHHIGHBITERRORRATETOPROMOTERESOURCEUTILIZATIONRATIOANDFAIRSHAREOFNETWORKRESOURCESCONSIDERINGTHELONGPROPAGATIONDELAYOFOURII
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簡(jiǎn)介:分類號(hào)V279學(xué)號(hào)13033173UDC密級(jí)公開(kāi)工學(xué)碩士學(xué)位論文基于移動(dòng)通信網(wǎng)絡(luò)的無(wú)人機(jī)飛行基于移動(dòng)通信網(wǎng)絡(luò)的無(wú)人機(jī)飛行管理關(guān)鍵技術(shù)研究管理關(guān)鍵技術(shù)研究碩士生姓名朱雷學(xué)科專業(yè)控制科學(xué)與工程研究方向無(wú)人作戰(zhàn)系統(tǒng)技術(shù)指導(dǎo)教師沈林成教授國(guó)防科學(xué)技術(shù)大學(xué)研究生院國(guó)防科學(xué)技術(shù)大學(xué)研究生院二〇一二〇一五年十一月年十一月基于移動(dòng)通信網(wǎng)絡(luò)的無(wú)人機(jī)飛行管理關(guān)鍵技術(shù)研究國(guó)防科學(xué)技術(shù)大學(xué)研究生院
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簡(jiǎn)介:北京化工大學(xué)碩士學(xué)位論文RBF型神經(jīng)網(wǎng)絡(luò)預(yù)測(cè)控制在衛(wèi)星姿態(tài)仿真系統(tǒng)中的應(yīng)用技術(shù)研究與試驗(yàn)姓名李彥琴申請(qǐng)學(xué)位級(jí)別碩士專業(yè)檢測(cè)技術(shù)與自動(dòng)化裝置指導(dǎo)教師韓建國(guó)200332塞些三奎璺登主鯊塞_一一。。效粟。最蜃,將上述麴毒棗綴瓤終疼??刂茟?yīng)照予氣浮臺(tái)鐫真系統(tǒng),實(shí)驗(yàn)證鞠該方法對(duì)予菲線性時(shí)交系統(tǒng)切實(shí)可行、效采菠好,兵有較強(qiáng)的魯椿塋,對(duì)今后的應(yīng)用其有一定韻措導(dǎo)意義。關(guān)鍵讕RBF網(wǎng)終,內(nèi)??刂疲琄MEANS聚類法,LYAPUNOV穩(wěn)寇性,氣浮臺(tái)
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簡(jiǎn)介:摘要隨著中國(guó)經(jīng)濟(jì)的不斷發(fā)展,中國(guó)金融市場(chǎng)在社會(huì)經(jīng)濟(jì)領(lǐng)域中所起到的資源配置作用越加凸顯,在全球化市場(chǎng)的不斷完善、金融創(chuàng)新層出不窮的大背景下,金融市場(chǎng)的穩(wěn)定運(yùn)作,己成為支持我國(guó)經(jīng)濟(jì)持續(xù)向前穩(wěn)步發(fā)展的重要因素,與我國(guó)未來(lái)的發(fā)展前景具有密不可分的聯(lián)系。在我國(guó)股票市場(chǎng)發(fā)展的二十多年歷史中,行業(yè)間的輪動(dòng)現(xiàn)象始終是投資者關(guān)注的熱點(diǎn)。如果能夠把握市場(chǎng)中行業(yè)間不斷此消彼長(zhǎng)的節(jié)奏,從行業(yè)配對(duì)交易策略入手,準(zhǔn)確預(yù)測(cè)相對(duì)表現(xiàn)強(qiáng)勢(shì)的行業(yè),不僅能在一定程度上揭示股票市場(chǎng)的運(yùn)行規(guī)律,更能在實(shí)踐中對(duì)投資起到良好的指導(dǎo)作用。神經(jīng)網(wǎng)絡(luò)技術(shù),因其具有的非線性映射、對(duì)于樣本的自適應(yīng)能力等優(yōu)點(diǎn),一經(jīng)面世就受到了學(xué)術(shù)界很大程度的關(guān)注,隨著其在模式識(shí)別、智能控制等工程領(lǐng)域所取得的一系列成功,人們逐漸發(fā)現(xiàn),神經(jīng)網(wǎng)絡(luò)擅于揭示數(shù)據(jù)間復(fù)雜的非線性映射關(guān)系的特性,為揭開(kāi)金融市場(chǎng)中變量間的相互關(guān)系提供了有效的途徑。本文首先通過(guò)市場(chǎng)中,不同行業(yè)的市盈率序列的平穩(wěn)性與協(xié)整性出發(fā),指出市盈率序列的差值往往具有更強(qiáng)的“均值回復(fù)特性”,從而表現(xiàn)出不同行業(yè)間的相對(duì)估值通常比行業(yè)本身的絕對(duì)估值具有更強(qiáng)穩(wěn)定性。進(jìn)而通過(guò)引入BP神經(jīng)網(wǎng)絡(luò)技術(shù),結(jié)合本文的預(yù)測(cè)對(duì)象,對(duì)BP網(wǎng)絡(luò)的輸入變量,網(wǎng)絡(luò)結(jié)構(gòu),初始權(quán)值、訓(xùn)練方法等多個(gè)方面進(jìn)行了優(yōu)化。最后以金融服務(wù)行業(yè)與醫(yī)藥生物行業(yè)為例,采用滾動(dòng)預(yù)測(cè)法,對(duì)2011142012229間的行業(yè)間相對(duì)強(qiáng)弱關(guān)系進(jìn)行了預(yù)測(cè)。仿真的結(jié)果表明,基于BP網(wǎng)絡(luò)對(duì)于行業(yè)間相對(duì)強(qiáng)弱關(guān)系的預(yù)測(cè)是切實(shí)可行的,并且對(duì)實(shí)際投資也具有很強(qiáng)的指導(dǎo)意義。關(guān)鍵詞量化投資,行業(yè)配對(duì),BP神經(jīng)網(wǎng)絡(luò),協(xié)整性檢驗(yàn)1目錄艘1ABSTRACT21緒論411選題背景412數(shù)理金融與量化投資在國(guó)內(nèi)外發(fā)展歷史與現(xiàn)狀513本文的研宄目的1014本文框架112市盈率序列協(xié)整性與行業(yè)配對(duì)交易策略1221行業(yè)輪動(dòng)現(xiàn)象與行業(yè)配對(duì)交易策略1222市盈率序列的平穩(wěn)性與協(xié)整性檢驗(yàn)1323本章小結(jié)183神經(jīng)網(wǎng)絡(luò)模型的構(gòu)建1931神經(jīng)網(wǎng)絡(luò)模型的發(fā)展歷史與特性1932BP神經(jīng)網(wǎng)絡(luò)2133本章小結(jié)294基于神經(jīng)元網(wǎng)絡(luò)的行業(yè)輪動(dòng)投資策略仿真3041投資策略仿真系統(tǒng)的設(shè)計(jì)邏輯3042樣本數(shù)據(jù)的選擇3143BP神經(jīng)網(wǎng)絡(luò)的構(gòu)建3744仿真結(jié)果與分析4145本章小結(jié)485辦4951本文的主要研宄成果4952本文的創(chuàng)新之處4953下一步工作方向50參考書(shū)目52附錄行業(yè)間相關(guān)系數(shù)矩陣54觀573
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簡(jiǎn)介:西北工業(yè)大學(xué)博士學(xué)位論文基于NURBS及神經(jīng)網(wǎng)絡(luò)技術(shù)的葉片優(yōu)化設(shè)計(jì)與實(shí)驗(yàn)研究姓名靳軍申請(qǐng)學(xué)位級(jí)別博士專業(yè)航空宇航推進(jìn)理論與工程指導(dǎo)教師劉波20070301西北工業(yè)大學(xué)博士學(xué)位論文部改型后尾緣區(qū)的氣流分離區(qū)減小,尾緣后部的漩渦強(qiáng)度減弱,尾跡漩渦的中心位置后移。同時(shí)風(fēng)扇在設(shè)計(jì)點(diǎn)處的壓比從27951上升到28014,上升了大約O2254%,效率從085917提高到O86243,增長(zhǎng)了約03794%。完成了自行設(shè)計(jì)的雙排對(duì)轉(zhuǎn)壓氣機(jī)性能匹配實(shí)驗(yàn)研究,實(shí)現(xiàn)了實(shí)驗(yàn)與數(shù)值計(jì)算結(jié)果的有效性驗(yàn)證;一系列的實(shí)驗(yàn)結(jié)果表明在設(shè)計(jì)轉(zhuǎn)速下,從堵點(diǎn)到喘點(diǎn),壓氣機(jī)的效率較高,基本處于08至O90之間,壓比浮動(dòng)范圍較大,但總體上維持在較高水平。隨著轉(zhuǎn)速的降低或兩轉(zhuǎn)子間轉(zhuǎn)差的增大,壓氣機(jī)雖然能穩(wěn)定工作,但性能迅速惡化,穩(wěn)定裕度減小,快速進(jìn)入喘振區(qū)。研究還發(fā)現(xiàn)當(dāng)轉(zhuǎn)子L中分配的加功量稍多于轉(zhuǎn)子2時(shí),兩轉(zhuǎn)子間的性能匹配更為合理。針對(duì)對(duì)轉(zhuǎn)壓氣機(jī)原始設(shè)計(jì)中葉片暴露的問(wèn)題對(duì)轉(zhuǎn)子L進(jìn)行了優(yōu)化改進(jìn)設(shè)計(jì),結(jié)果表明優(yōu)化設(shè)計(jì)后,轉(zhuǎn)子1吸力面上的氣流分離線位置后移,氣流分離區(qū)減小,根部區(qū)域馬赫數(shù)等值線變化不大,在中間和尖部區(qū)域靠近尾緣處的尾跡區(qū)減?。辉诓煌D(zhuǎn)速下的對(duì)轉(zhuǎn)壓氣機(jī)的壓比都比改型前提高了約09%左右,效率變化不大,但穩(wěn)定工作范圍都有所增加,且轉(zhuǎn)速越低,穩(wěn)定工作范圍增長(zhǎng)幅度越大,達(dá)到了優(yōu)化的目的關(guān)鍵詞M瓜BS,神經(jīng)網(wǎng)絡(luò),優(yōu)化設(shè)計(jì),對(duì)轉(zhuǎn)壓氣機(jī),性能實(shí)驗(yàn)Ⅱ
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簡(jiǎn)介:西北工業(yè)大學(xué)碩士學(xué)位論文航空電子系統(tǒng)可信計(jì)算網(wǎng)絡(luò)關(guān)鍵技術(shù)研究姓名吳延昌申請(qǐng)學(xué)位級(jí)別碩士專業(yè)計(jì)算機(jī)系統(tǒng)結(jié)構(gòu)指導(dǎo)教師馮萍20060301ABSTRACTINTHEFUTURENETWORKWARIFEENVIRONMENTALLTHETERMNALUNITSOFAIRPLANE,SUCHASTHEAIRBORNESENSOR,THEEXECUTOR,THEDISPAY,THECONTROLLERORTHEPROCESSOR,SHOULDBEREGM‘DEDASTHENODESOFTHEBETWORKOFNEWGENERATIONAVIONICSINTEGRATEDSYSTEMAIS,WHICHANSWERFOFTHEDIFFERENTTASKSOFINFORMATIONCOLLECTI0I,STORAGE,PROCESSJNGANDAPPLICATIONTHERESEARCHWORKOFTHISDISSERTATIONISSUPPERTEDBYTHEAVIATIONSCLENCEFOUNDATIONPROJECT,NAMED“ASTUDYOFAVIONICSINTEGRALEDSYSTEMORIENTEDSWITCHNETWORKWITHTRANSMISSIONFIBRECHANNEL”MA【NRESEARCHWORKINCLUDESTHEFOLLOWINGSEVERALWORKSTOPICSTHEDEVELOPMENTOFTHEAISWASANALYZEDINTHISDISSERTATIONFORTHEFUTURECENTRICNETWORKWARFAREANDTHETARGETOFTHETRUSTEDCOMPUTLNG,ALAYEREDARCHITECTUREOFTHENEWAISUNIFIEDNETWORKWASBROUGHTFORWARD,INWHICHTHERESEARCHAIMANDTHECONTENTOFEACHLAYERWASEXPATIDTED,ANDTHEAISTRUSTEDCOMPUTINGNETWORKISDEFINEDFORTHENEWMODELOFTHENETWORKAYER,THEAIRBORNESENSORWASSEJECTEDASTHERESEARCHOBJECT,BECAUSETHENUMBEROFTHEAJRBORNESENSORSISLARGERANDLARGER,ANDTHEDATATHATNEEDPROCESSBECOMEMEREANDMOREINTHENEWGONERATONAISTHEHIGHINTEGRATIONANDRETWORKIZATIONOFTHE“RBORNEMULTISENSEGSHAVEBEENTHEMAINDOVELPINGDJRECTIONATTHESALLLELIME,THENETWORKLZATIONWARFAREOBJECTIVELYNEEDSTHATTHEAIRBORNESENSERSGETRICLOFTHEIJMITOFTHESINGLEFIGHTERPLANEBECEMINGONENODEOI’THEWHO_EW,LRFARENOTWORKSOALLESENSORSINTHENETWORKEJWGRFARECANS|1IRETILEINFORMATIONBYTHEWAYORCOLLECTINGPRCOSSINGANDTFUNSILLISSJ11THEKEYTECHNOLOGYORTHEAIRBORNESENSERSCONNECTEDTOTHE“UNIFIEDNETWORK”『1THENETWORKIZLTIONWARFAROENVIRONMENTWASRESEARCHCCJINTHJSDISSERTATION7RHECOLIECTJNGS01ECTINGANDPROCOSSINGFTHELIRBERNESENSORDATAINTHENETWORKWASARKLLVZEDAMDRESEARCHEDBASEJON1HECHARACTERISTICOFFUTUROA【RBORNESENSORSTHEDOVELOPMENTDIFEETJOIL0FTHESTANDARDIZATIONANTLNETWORKIZATIONWASANALVZEDTHECONNECTIONEF’THEII
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簡(jiǎn)介:上海交通大學(xué)博士后學(xué)位論文面向未來(lái)航電應(yīng)用的FC統(tǒng)一網(wǎng)絡(luò)關(guān)鍵技術(shù)研究姓名徐曉飛申請(qǐng)學(xué)位級(jí)別博士后專業(yè)通信與信息系統(tǒng)指導(dǎo)教師姚拱元龔誠(chéng)20060801上海交通大學(xué)博十后研究I作報(bào)告ABSTRACTT11ERESEARCHCONDUCTEDINTHISREPORTISDEVOTEDTOTHEHIGHSPEEDSWITCHNETWORKBASEDONFIBERINTERCONNECTS,WHICHISACORETECHNOLOGYOFDATA仃ANSMININGNETWORKTOBEAPPLIEDINMODEMSYSTEMSANDISHENCEAMAINTOPICINCHINESETENTHFIVEYEARPROGRAMBYUSINGAFABRICSTRUCTUREBASEDONHIGHSPEEDCROSSBARTHISREPORTFOCUSESONTHEFIBERCHANNELRFCUNIVERSENETWORKINAVIONIC8SYSTEMSDETAILSOFTHEREPORTAREASFOLLOWSCURRENTLYTHECOMMERCIALHIGHSPEEDSWITCHISUSUALLYREALIZEDBYSEVERALMODULESWHICHISINTERCONNECTEDBYABACLDLANEBUSTHESIZEOFCOMMERCIALSWITCHISNOTRESTRICTEDHOWEVELA32PORTSWITCHIMPLEMENTATIONWITHLIMITEDSIZEISREQUIREDBYANAVIONICSSYSTEMDESIGNTO廿LISENDWEHAVEDESIGNEDASCHEMEOF32一PORTSWITCHINWHICHFOURSWITCHCHIPS,EACHOFAVIRTUALOUTPUTQUEUINGVOQSTRUCTURE,ARCDIRECTLYINTERCORMECTEDTHESIMULATIONRESULTSHOWSTHATTHESWITCHCANMEETTHEDEMANDOFAVIONICSSYSTEMTHESTATEOFARTFLOWCONTR01STRATEGIESINCOMMERCIALFCSWITCHNETWORKAREUSUALLYDATAFRAMEORIENTED,ANDAREHENCEINADEQUATEOFAVIONICSAPPLICATIONSACCORDINGTOTHEFCCOMMUNICATIONPROTOCO】ANDTHECHARACTERISTICOFHIGHSPEEDSWITCHTHISREPORTPROPOSESACELLORIENTEDMECHANISMTOREALIZEFLOWCONTROLINAVIONICSSYSTEMTHESIMULATIONRESULTSSHOWTHAT,COMPAREDTOTRADHIONALFLOWCONTROLMECHANISM,THEEMCIENCYOFTHEPROPOSEDFLOWCONTROLMECHANISMISSIGNIFICANTLYHIGHERACCORDINGTOTHERELEVANTFCPROTOCOL,THEREPORTBUILDSANDSIMULATESASUCCINCTMODELFORFCUNIVERSENETWORK111EFUNCTIONALANDPERFORMANCESIMULATIONOFTHEMODELSHOWSTHATTHEMODELOFFCUNIVERSENETWORKHASGOODPERFORMANCEPRACTICEINTHEDESIGNOF32PORTSWITCHALSOPROVESTHATTHEMODELISCORRECTANDAPPROPRIATEACCORDINGTOFCPROTOCOL,THEPAPERDESIGNS,IMPLEMENTSANDTESTSA1GBPS8PORTFCSWITCHWHICHBUILDSAGOODBASISFORFURTHERREALIZATIONOF32一PORTSWITCHKEYWORDSAVIONICS,HI曲一SPEEDSWITCHNETWORKSWITCHSTRUCTURE,COMMUNICATIONSCHEDULINGALGORITHMS,F(xiàn)LOWCONTROL,SIMULATIONSYSTEM
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簡(jiǎn)介:|INTLILLHLLLLLLIIILLLLLILL111111111LY1436650分類號(hào)UDC密級(jí)編號(hào)工學(xué)碩士學(xué)位論文基于小波神經(jīng)網(wǎng)絡(luò)的導(dǎo)航傳感器故障診斷技術(shù)研究碩士研究生指導(dǎo)教師學(xué)位級(jí)別學(xué)科、專業(yè)所在單位論文提交日期論文答辯日期學(xué)位授予單位馬吉臣錢(qián)華明教授工學(xué)碩士檢測(cè)技術(shù)與自動(dòng)化裝置自動(dòng)化學(xué)院2008年1月15日2008年1月22日啥爾濱工程大學(xué)ABSTRACTUNDERTHEDEMANDOFAVIATIONANDSPACETECHNOLOGYACARRIERMAYBEEQUIPPEDMANYDIFFERENTNAVIGATIONEQUIPMENTSANDONLYANAVIGATIONEQUIPMENTCANNOTADEPTTOALLTHECIRCUMSTANCES,THEINFORMATIONPROVIDEDBYNAVIGATIONSYSTEMHADDEVELOPEDFROMSIMPLEPOSITIONPARAMETERTOTHECOMBINATIONBETWEENNAVIGATIONSYSTEMANDMEASUREMENTSYSTEM,WHICHCANPROVIDEACCURATEPOSITIONANDMILITARYMEASUREMENTCOMPOSEDINTOANAVIGATIONSYSTEMNAVIGAITONSYSTEMCANCOMPENSATENAVIGATIONINFORMATIONWHICHPROVIDEDFROMNAVIGATIONEQUIPMENTS,WITHTHISABILITYINTERGRATEDNAVIGATIONSYSTEMCALLADEPTTOCOMPLEXITYWORKENVIRONMENTANDHASACCURATENAVIGATIONACCURACYIN也EPAPERTHEINTEGRATEDNAVIGATIONSENSORSSYSTEMISTHESUBJECTINVESTIGATEDTHEPAPERCHOSEALLINTELLIGENTMETHODTOFAULTDIAGNOSISBASEDONNAVIGATIONSENSORSWHENASENSORHADFAULTSOTHERSENSORSINSTEADTHEFAULTSENSORASTHENAVIGATIONEQUIPMENT,THEMETHODCANAVOIDTHEHIGHPRICEOFHARDWAREREDUNDANTMANYMATERIALSARELOOKEDUPBEFORETHETHEMESTART,ANDPROOFTHETHEMEFEASIBLEINTHEPAPERANALYZEDTHEPROCESSOFFAULTDIAGNOSISANDTHEPURPOSEOFFAULTDIAGNOSIS,ANDINTRODUCEDWAVELETTRANSFORMTHEPAPERSIMULATESTHEWAVELETTRANSFORMANDNEURALNETWORKPROCESS,WHICHTARGETISGYROOWINGTOINERTIASYSTEMSAMPLINGTHESTATUSOUTPUTOFGYRO,DECOMPOSETHESIGNALBYTHREELAYERWAVELETPACKETFEATUREEXERTIONAFTERDECOMPOSITIONFOREIGHTNODES,THENAN8DIMENSIONALEIGENVECTORISUSEDASFAULTSAMPLESTOTRAINATHREE1AYERRADICALBASISFUNCTIONRBFNEURALNETWORKAFTERTHETRAININGPROCESSTHENETWORKCANDETECTAFAULTONLINEAFTERTESTINGTHEMETHODCANDETECTEDTHEFAULTSACCURATELYCOMPACTNESSMETHODWASCHOSENTOFAULTDIAGNOSIS,THEMETHODMIXESTHEWAVELETTRANSFORILLANDNEURALNETWORKTOGETHERWHICHCHOOSEWAVELETFUNCTIONASTHENEURONFUNCTIONOFBPNEURALNETWORKTHEGPSANDDVLWERECHOSENASTHEEXAMPLESTOFAULTSDIAGNOSISTHEMETHODAVOIDSTHEDISADVANTAGEOFBPNEURAL
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簡(jiǎn)介:南京航空航天大學(xué)碩士學(xué)位論文熱工流體網(wǎng)絡(luò)流量調(diào)節(jié)技術(shù)研究姓名呂永超申請(qǐng)學(xué)位級(jí)別碩士專業(yè)人機(jī)與環(huán)境工程指導(dǎo)教師朱春玲20060201熱工流體網(wǎng)絡(luò)流量調(diào)節(jié)技術(shù)研究IIABSTRACTTHERMALDISSIPATIONOFELECTRONICEQUIPMENTSISRISINGMEMEQUICKLYBUTTHEIRVOLUMEISSMALLERSMALLERTHEHEATFLUXOFCOMPONENTISINCREASINGGEMINATELYTHEFLUIDCOOLINGSYSTEMPLAYSANIMPTANTROLEININDUSTRYPRODUCTIONAERONAUTICSASTRONAUTICSMILITARYEQUIPMENTOFNATIONALDEFENCEINLARGEMULTIHEATSOURCEFLUIDCOOLINGSYSTEMWATERPOWERMALADJUSTMENTISVERYSEVERETHEWATERPOWERMALADJUSTMENTCANMAKEHEATSOURCEOUTOFCOOLINGFLUIDMACHINERYOUTOFEFFICIENCYTHATTHEPOWEROFWHOLESYSTEMCANGOUPQUICKLYSOITISVERYIMPTANTTOBALANCETHEWATERPOWEROFFLUIDCOOLINGSYSTEMTHISPAPERRESEARCHESANALYSESDOMESTICOVERSEASFLUXREGULATIONMETHODSOFFLUIDWKCOMPARESTHESEMETHODSIDESIGNEDANEXPERIMENTSYSTEMOFFLOWDISTRIBUTIONREGULATIONANALYZEDTHEPRINCIPLEOFFLUIDWKMADEAMATHEMATICALMODELOFEXPERIMENTSYSTEMWITHGRAPHTHEYFINDTHESOLUTIONOFTHEMODELFLUIDWKWASDIVIDEDINTOALOTOFINDEPENDENTLOOPSTHROUGHCHANGINGSTATESOFVALVESIGOTPIPEFLUXPIPEPRESSUREBASEDONPRESSUREBALANCEEQUATIONIBUILTTHEDIFFERENTIALEQUATIONSYSTEMSOLVEDTHEDIFFERENTIALEQUATIONSYSTEMACQUIREDRESISTANCECOEFFICIENTSOFPIPESCOMPONENTTHROUGHSETTINGIDEALFLUXOFTHEEXPERIMENTSYSTEMSOLVINGTHEMATHEMATICALMODELIACQUIREDOPENDEGREEOFEVERYREGULATIONVALVEAFTERSETTINGREGULATIONVALVESITESTEDFLUXOFTHEWKCOMPAREDTHETESTEDFLUXWITHTHEIDEALFLUXVALIDATECRECTNESSOFTHEWAYIUSEDINTHISPAPERKEYWDSFLUIDWKFLOWREGULATIONNODEFLOWINDEPENDENTLOOPSPIPERESISTANCECOEFFICIENTOPENDEGREEOFVALVE
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簡(jiǎn)介:中國(guó)民航大學(xué)碩士學(xué)位論文機(jī)場(chǎng)網(wǎng)絡(luò)可視化監(jiān)測(cè)系統(tǒng)關(guān)鍵技術(shù)研究與實(shí)現(xiàn)姓名司振生申請(qǐng)學(xué)位級(jí)別碩士專業(yè)計(jì)算機(jī)應(yīng)用技術(shù)指導(dǎo)教師姚立平顧兆軍20080405中國(guó)民航大學(xué)碩士學(xué)位論文ABSTRACTWITHTHERAPIDDEVELOPMENTOFINFORMATIONTECHNOLOGYTHENETWORKINAIRPORTBECOMESINCREASINGLYCOMPLEXANDDIVERSEIFTHENETWORKEQUIPMENTISFAILUREORDOESN’TOPERATEWELL,ITWILLAFFECTEFFICIENCYANDEVENRESULTINTHEPARALYSISOFTHEENTIREAIRPORTHOWEVERTHETRADITIONALNETWORKEQUIPMENTMONITORINGSYSTEMHASBEENUNABLETOMEETTHELARGESCALENETWORKMONITORINGSOINTHISPAPERTHECOMGISISEMBEDINTONETWORKMONITORINGSYSTEMANDIMPLEMENTTHEARCHETYPALSYSTEMOFAIRPORTNETWORKVISUALIZATIONMONITORINGSYSTEMATFIRST,THISPAPERDESCRIBESNETWORKMONITORINGANDRELATEDTECHNOLOGIESTHEN,ACCORDINGTOTHECHARACTERISTICOFTHEAIRPORTNETWORK,KEYTECHNOLOGIESUSEDINVISUALIZATIONMONITORINGSYSTEMARETOBEANALYSISANDRESEARCH,SUCHASNETWORKTOPOLOGYDISCOVERYNETWORKFLOWCOLLECTANDMONITORINGHOSTRESOURCEMONITORINGFAULTMONITORINGERETHEGISTECHNOLOGYASTHEMAJORMEANSOFVISUALIZATIONMONITORINGISBESTUDIEDANDUSEDTOPACKAGENETWORKEQUIPMENTATLAST,THEPROTOTYPESYSTEMOFAIRPORTNETWORKVISUALIZATIONMONITORINGSYSTEMBASEDONTHREETIERC/SSTRUCTUREISDESIGNEDANDIMPLEMENTEDTHEVISUALIZATIONMONITORINGSYSTEMUSESTHISGISTECHNOLOGYTOIMPLEMENTNETWORKMONITORINGANDCANMEETTHENEEDSOFNETWORKMONITORINGINCURRENTAIRPORTITISVERYPRACTICALANDSCALABILITYKEYWORDSNETWORKMONITORING,NETWORKTOPOLOGYDISCOVERYNETWORKMANAGEMENT,COMGISII
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