简介：Aneworganicsemiconductortartaricaciddopedsaltofemeraldinepolyaniline(PANI-C4H6O6)hasbeenobtainedbythemethodofoxidativepolymerizationofmonomericanilinewithammoniumpersulfateinacidicsolution.ThestructurewascharacterizedbyFourierTransformInfraredtechnique(FTIR)andX-raydiffraction(XRD).Thetemperaturedependencedcconductivityδdc(T)showsasemiconductorbehaviorandfollowsthequasionedimensionalvariablerangehopping(Q1D-VRH)model.Dataonδdc(T)arealsodiscussed.

简介：Photoluminescenceevaluationofpandntype6H-SiCsampleshasbeendone.Resultsshowthatatlowtemperaturethephotoluminescenceof6H-SiCisclearlydominatedbydonor-acceptorpairtransitions,insomecase,free-to-donortransitioncouldbeobservedathighertemperature.Thethermalquenchingprocessesofthephotoluminescencehavebeeninvestigatedtodeterminethepossibleionizationnenergiesoftheimpurities.

简介：ThemicrostructureandopticalpropertiesofaburiedlayerformedbyO+(200keV,1.8×1018/cm2)andN+(180keV,4×1017/cm2)co-implantationandannealedat1200℃for2hhavebeeninvestigatedbyAugerelectron,IRabsorptionandreflectionspectroscopicmeasurements.TheresultsshowthattheburiedlayerconsistsofsilicondioxideandSiOx（x<2）andthenitrogensegregatestothewingsoftheburiedlayerwhereitformsanoxynitride.BydetailtheoreticalanalysisandcomputersimulationoftheIRreflectioninterferencespectrum,therefractiveindexprofilesoftheburiedlayerwereobtained.

简介：我们认识到NiCo2由激光照耀的O4nanomaterialsNiCo2有不同集中的O4暂停。结果表明同样准备的样品是有568nm和优异dispersity的最大的平均尺寸的需要的范围，它在0.30JDS的精力密度被获得)。Obwohl死ErkrankungenvieleGemeinsamkeitenaufweisen(Fiebersch浭湥慦獳湵?浉畭歮浯牰浯瑩楴牥湵?楢杲?浩敭?楥?牥???獥删獩歩????釧????????闧?郦????駥?釧?闦??駥?跧???闦?臧?臧????駥膹?郦?飧?蓦???釧?釧?蓦???跧?觧??跧?????觧?釧??闦??闦?觧?郧?闦???跧???釧????触?跧??趥觧?鷦？？

简介：UsingdoublecrystalX-raysdiffraction(DCXRD)andatomicforcemicroscopy(AFM),theresultsofGexSi1-xgrownUHV/CVDfromSi2H6andSiH4areanalyzedandcompared.Adsorbatescanmigratetotheenergy-favoringpositionduetotheslowgrowthratefromSiH4.Inthiscase,aSibufferthatisolatestheeffectofsubstrateonepilayercouldnotbegrown,whichresultsinapitpenetratingintoepilayerandbuffer.TheFWHMis0.055°inDCXRDfromSiH4.Thepresenceofdiffractionfringesisanindicationofanexcellentcrystallinequality,TheroughnessofthesurfaceisimprovedifgrownbySi2H6:however,thecrystalqualityoftheGex2Si1-xmaterialbecameworsethanthatfromSiH4duetomuchlargergrowthratefromSi2H6.ThecontentofGeisobtainedfromDCXRD,whichindicatesthegrowthratefromSi2H6islargest,thenGeH4andthatfromSiH4isleast.

简介：C4ISR系统正向网络中心化发展，其体系架构研究成为系统研制和建设中的关键问题之一。总结归纳了C4ISR系统架构的发展历程，提出了C4ISR系统网络中心架构模型。该模型是一种基于军事信息基础设施的“三网”耦合模型。针对体系资源的组织和运用，进一步提出了C4ISR系统网络中心资源组织与处理模型，旨在为网络中心化C4ISR系统的设计、研制和建设提供理论指导和参考。

简介：Organicmultiplequantumwells(OMQWs)consistingofalternatinglayersoforganicmaterialshavebeenfabricatedfromtris(8-hdroxyquinoline)aluminum(Alq)and2-(4-biphenylyl)-5-(4-tertbutylphenyl)-1,3,3-oxadiazole(PBD)byamultisource-typehigh-vacuumorganicmoleculardeposition.Fromthesmall-angleX-raydiffractionpatternsofAlq/PBDOMQWs,aperiodicallylayeredstructureisconfirmedthroughtheentirestack.TheAlqlayerthicknessintheOMQWswasvariedfrom1nmto4nm.Fromtheopticalaborption,photoluminescenceandelectroluminescencemeasurements,itisfoundthattheexcitonenergyshiftstohigherenergywithdecreasingAlqlayerthickness,ThechangesoftheexcitonenergycouldbeinterpretedastheconfinementeffectsofexcitonintheAlqthinlayers.Narrowingoftheemissionspectrumhasalsobeenobservedfortheelectroluminescentdevices(ELDs)withtheOMQWsstructureatroomtemperature.

简介：移动Ad—Hoc网络是一系列装备无线通信装置、具有联网能力的设备的集合，其网络运行完全取决于自身的能力，不依赖于已有的网络基础设施，且具有优异的抗毁修复能力，因此非常适合构建C4ISR系统。着重介绍了Ad-Hoc网络的结构和关键特性，并以空中、地面为应用场景提出了Ad-Hoc网络在C4ISR中的应用设想。

简介：对C4ISR系统项目实施科学、有效的管理和控制，能够有效保障和提高其作战效能的发挥。进度控制、成本控制和质量控制是项目控制的基本内容，文中先针对C4ISR系统研制项目特点、C4ISR系统项目管理中的质量控制、进度控制和成本控制流程及适用的方法工具进行了详述，最后特别指出了对C4ISR系统项目质量、进度、成本进行协调控制的必要性。

简介：Modelingandreasoningondomaincontextsplayakeyroleforaddingintelligencetocommunicationservices,andtheapproachofcapability-basedrequirementengineeringensuresthescientificityandaccuracyofrequirementelicitation.Thispaperpresentsacapability-basedcontextontologymodelingapproachforcommandandcontrol,communication,computer,intelligence,surveillanceandreconnaissance(C4ISR)communication.Primarily,acapability-basedC~4ISRcommunicationmeta-conceptmodelandaC~4ISRcommunicationcontextmeta-ontologyareconstructed.ThecontextontologyisestablishedundertheconstraintsoftheC~4ISRcommunicationcontextmeta-ontology,andfurthermore,algorithmsareproposedtosupportcontextreasoningbasedondescriptionlogic.Acasestudyispresentedtodemonstrateapplicabilityoftheproposedmethod.

简介：体系对抗环境下，需要考虑电磁干扰对C4ISR系统应用层的影响。提出了从系统效能层和作战效能层评估防空CtISR系统抗干扰能力的方法。建立了系统抗干扰评估指标体系，介绍了评估指标的定量计算模型及其规范化处理方法。结合层次分析法，给出了系统在应用层抗干扰能力的综合评估模型。通过应用案例，阐明该评估模型的应用方法。实践证明，该评估模型对改进系统设计、提高系统效能具有一定价值。

简介：Anultrahighvacuumchemicalvapordeposition(UHV/CVD)systemisintroduced.SiGealloysandSiGe/Simultiplequantumwells(MQWs)havebeengrownbycold-wallUHV/CVDusingdisilane(Si2H6)andgermane(GeH4)asthereactantgasesonSi(100)substrates.ThegrowthrateandGecontentsinSiGealloysarestudiedatdifferenttemperatureanddifferentgasflow.ThegrowthrateofSiGealloyisdecreasedwiththeincreaseofGeH4flowathightemperature.X-raydiffractionmeasurementshowsthatSiGe/SiMQWshavegoodcrystallinity,sharpinterfaceanduniformity.Nodislocationisfoundintheobservationoftransmissionelectronmicroscopy(TEM)ofSiGe/SiMQWs.TheaveragedeviationofthethicknessandthefractionofGeinsingleSiGealloysampleare3.31%and2.01%,respectively.

简介：Inthispaper,wedemonstratetheacetylehe(C2H2)sensorwithhighsensitivityusingahollow-corephotonicbandgapfiber(HC-PCF).ExperimentsformeasuringC2H2concentrationsingasmixtureareperformed.Usinga2m-longHC-PCFasgascell,thespectrumofacetyleneatn1+n3bandhasbeenmeasured,andtheP11-branchhasbeenselectedforthepurposeofsensing.Aminimumdetectivityof143partspermillionbyvolume(ppmv)forthesystemconfigurationisestimated.

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简介：［1］CaoYY,LamsJ.RobustH∞ControlofUncertainMarkovianJumpSystemswithTime-Delay.IEEETrans.Automat.Contr.,2000,45(1):77～83.［2］DoyleJC,Glover,KhargonekarPP,etal.State-SpaceSolutionstoStandardH2andH∞ControlProblems.IEEETrans.Automat.Contr.,1989,34(8):831～847.［3］FridmanE,ShakedU.H∞-normandInvariantManifoldsofSystemswithStateDelays.Sys.&Contr.Lett.,1999,36(2):157～165.［4］GeJ,FrankPM,LinCF.RobustH∞StateFeedbackControlforLinearSystemswithStateDelayandParameterUncertainty.Automatica,1996,32(6):1183～1185.［5］HirataM,LiuKZ,SatoT,etal.ASolvabilityConditionofanExtendedH∞ControlProblemUsingRiccatiInequalities.Int.J.Contr.,2000,73(4):265～275.［6］HmamedA.FurtherResultsontheRobustStabilityofUncertainTime-DelaySystems.Int.J.Syst.Sci.,1991,22(3):605～619.［7］IwasakiT,Skelton,E.AllControllersfortheGeneralH∞ControlProblem:LMIExistingConditionsandState-SpaceFormulas.Automatica,1994,42(7):1307～1317.［8］LeeB,LeeJG.RobustStabilizationofLinearDelayedSystemswithStructuredUncertainty.Automatica,1999,35(6):1149～1154.［9］LeeKH,MoonYS,KwonWH.RobustStabilityAnalysisofParametricUncertainTime-DelaySystems.InProceedingofIEEEConferenceonDecisionandControl,Tampa,FL,1998:1346～1352.［10］LehmanB,KhalilS.DelayIndependentStabilityConditionsandDecayEstimatesforTime-VaryingFunctional.IEEETrans.Automat.Contr.,1994,39(8):1673～1676.［11］MahmoudMS,Al-MuthairiNF.DesignofRobustControllersforTime-DelaySystems.IEEETrans.Automat.Contr.,1994,39(2):159～161.［12］MoriETN,KuwaharaM.AwaytoStabilizeLinearSystemswithDelayedState.Automatica,1983,19(5):571～573.［13］NiculescuSI,andAnnasuamyAM.ASimpleAdaptiveControllerforPositive-RealSystemswithTime-Delay.ProceedingoftheAmericanControlConference,Chicago,Illi

简介：Recently,Changetal.proposedaSudoku-basedsecretimagesharingscheme.TheyutilizedtheSudokugridtogeneratemeaningfulshadowimages,andtheirschemesatisfiedallessentialrequirements.BasedonChangetal.'sscheme,weproposeanovel(n,n)secretimagesharingschemebasedonSudoku.Intheproposedscheme,asecretimagecanbesharedamongndifferentcoverimagesbygeneratingnshadowimages,andthesecretimagecanbereconstructedwithoutdistortionusingonlythesenshadowimages.Also,theproposedschemecansolvetheoverflowandunderflowproblems.Theexperimentalresultsshowthatthevisualqualityoftheshadowimagesissatisfactory.Furthermore,theproposedschemeallowsforalargeembeddingcapacity.

简介：针对各类系统资源如何高效协同运作以适应战场变化问题,建立了系统资源主体模型,提出了一种基于工作流和自主协商相结合的系统资源主体动态协同机制,并建立了4种系统资源主体间协同策略,实现了系统资源主体动态协同。最后通过仿真试验分析,验证了协同框架与协同策略的有效性。

简介：HandoverinDigitalVideoBroadcastingforHandhelds(DVB-H)aimstoprovidecontinuousmobilebroadcastingserviceswhenauseristravelingthroughcellboundaries.Agoodhandovercontrolcanimprovethepowerefficiencyandgainmuchbetterreceptionquality.ThisletterprovidesanovelapproachforDVB-HhandoverbasedonDVB-H/UniversalMobileTelecommunicationsSystem(UMTS)hybridnetwork,whichmovesthemainhandoverfunctionfromtheterminalstothenetworks,sothatitreducestheoperationcomplexityoftheterminalsandincreasesthepowersaving.WhentheterminalcannotreceivetheDVB-Hsignalinthetransmissionshadowareasorbecauseofsomeotherreasons,theUMTSnetworksmayofferthesameservicetouserstomaketheservicecontinuous.AstheUMTSnetworkshavethetopologyoftheDVB-Hnetworks,bycommunicatingwiththeterminals,theUMTSnetworkscanhelptheterminalstopredictthehandover,andavoidunnecessaryhandover.

简介：Thea-Si∶H/SiNx∶HsampleseriesareinvestigatedbymeansofRamanscatteringtechnique(RST).Theresultshowsthatduetothestructuralmismatchbetweena-Si∶Handa-SiNx∶H,severeinduceddistortionsareproducedintheinterfaceoftheheterojunction,andtheseinduceddistortionstendtowardsacertainenergystate.Theorderingoftheinterfacestructuredependsontheperiodicnumberofmultilayerthinfilms.

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