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500 个结果
  • 简介:ThispaperstartswiththediscussionoftheprincipleofReduced-Rank(RR)Space-TimeAdaptiveProcessing(STAP).Itisfollowedbyadedicationoftheupperboundperformanceofalleigen-basedRRmethodsprovidedbyCrossSpectralMethod(CSM)undertheconditionofagivenprocessorrankandanidenticalsecondarysamplesize.AperformancecomparisonbetweentwoRRSTAPprocessorswithprefixedstructureandCSMisperformedbythemeansofsimulations.Itisshownthattheperformanceoftimepre-filteringfollowedbyjointlylocalizedSTAPstructure(i.e.3DT-SAP)isveryclosetotheupperboundandtherebyitisaneffectiveRRapproach.

  • 标签: Airborne phased array RADAR REDUCED-RANK STAP
  • 简介:让S是有一个有限区域的夸张Riemann表面。让GS的盖住的组对夸张飞机H正在起作用。在这份报纸,作者在印射的班组学习一些代数学的关系为=S\{一个点}。在二Dehn扭曲的产品和印射班的产品之间的唯一的可能的关系由G的二个寓言的元素决定了的作者表演是减少的灯笼关系。作为后果,J.D.麦卡锡提出的一个问题的一个部分答案被获得。

  • 标签: 关系映射 RIEMANN 元宵 代数关系 S映射 抛物线
  • 简介:本地化是在无线传感器网络的实质的问题之一。为活动烽火本地化的关键问题是怎么选择适当烽火轨道。然而,很少研究都没在它上被做。在这篇论文,第一,我们推出位置的数字让烽火根据ROI(兴趣的区域)的面积送一个包;下我们在场一个新奇方法基于虚拟力量到在任意的ROI安排位置;然后,我们使用TSP(旅行售货员问题)算法到位置顺序到获得最佳的旅游路径,即减少的烽火轨道。活动烽火什么时候沿着旅游路径移动,送RF,在每个位置发信号,在ROI的传感器能与trilateration得出他们的位置。试验性的结果证明本地化方法,基于烽火减少的路径,是有效的;有灵活精确性。

  • 标签: 计算机网络 传感器 移动灯塔 虚拟技术
  • 简介:Inordertoslovethelarge-scalenonlinearprogramming(NLP)problemsefficiently,anefficientoptimizationalgorithmbasedonreducedsequentialquadraticprogramming(rSQP)andautomaticdifferentiation(AD)ispresentedinthispaper.Withthecharacteristicsofsparseness,relativelylowdegreesoffreedomandequalityconstraintsutilized,thenonlinearprogrammingproblemissolvedbyimprovedrSQPsolver.Inthesolvingprocess,ADtechnologyisusedtoobtainaccurategradientinformation.Thenumericalresultsshowthatthecombinedalgorithm,whichissuitableforlarge-scaleprocessoptimizationproblems,cancalculatemoreefficientlythanrSQPitself.

  • 标签: 简化序列二次规划 优化算法 自动微分法 大规模非线性规划
  • 简介:Hydrodynamicoptimizationofthehullformscanberealizedthroughtheimplementationandintegrationofcomputationaltoolsthatconsistofahydrodynamicmodule,ahullsurfacerepresentationandmodificationmodule,andanoptimizationmodule.Inthepresentpaper,anewbulbousbowgenerationandmodificationtechniquehasbeendevelopedandintegratedintothehullsurfacerepresentationandmodificationmodule.Aradialbasisfunctionbasedsurrogatemodelisdevelopedtoapproximatetheobjectivefunctionsandreducethecomputingcost.Amulti-objectiveartificialbeecolonyoptimizationalgorithmisimplementedandintegratedintotheoptimizationmodule.Toillustratetheintegratedhydrodynamicoptimizationtools,acargoshipisoptimizedforreduceddrag.Theoptimalhullformsobtainedarethenvalidatedcomputationallyandexperimentally.Validationresultsshowthatthepresenttoolscanbeusedefficientlyandeffectivelyinthesimulationbaseddesignofthehullformsforreduceddrag.

  • 标签: 船型优化 阻力 货船 优化模块 流体动力学 计算工具
  • 简介:Weintroducethenotionofproperty(RD)foralocallycompact,Hausdorffandr-discretegroupoidG,andshowthatthesetS2^l(G)ofrapidlydecreasingfunctionsonGwithrespecttoacontinuouslengthfunctionIisadensespectralinvariantandFreehet*-subalgebraofthereducedgroupoidC^*-algebraCr^*.(G)ofGwhenGhasproperty(RD)withrespecttol,sotheK-theoriesofbothalgebrasareisomorphicunderinclusion.EachnormalizedcoeycleconG,togetherwithaninvariantprobabilitymeasureontheunitspaceGoofG,givesrisetoacanonicalmapTconthealgebraCo(G)ofcomplexcontinuousfunctionswithcompactsupportonG.WeshowthatthemapTccanbeextendedcontinuouslytoS2^l(G)andplaysthesameroleasann-traceonCr^*(G)whenGhasproperty(RD)andcisofpolynomialgrowthwithrespecttol,sotheConnes'fundamentparingbetweentheK-theoryandthecycliccohomologygivesustheK-theoryinvariantsonCr^*(G).

  • 标签: GROUPOID C^*-algebra property (RD) SPECTRAL INVARIANCE
  • 简介:Epicuticularwaxformstheoutermostprotectivebarrieroftheaerialsurfacesoflandplants,workinginconcertwithothercomponentsoftheplantcuticletopreventuncontrolledlossofwaterandtoprovideprotectionagainstanarrayofexternalenvironmentalstress.Inthisstudy,chemicallymutagenizedpopulationsofrice(OryzasativaL.)derivedfromapproximately4750M2familieswerescreenedforadhesionofwaterdropletsresultinginawetleaf/glossy(wlg)phenotype.Mutantswereidentifiedin11independently-derivedM2families.Scanningelectronmicroscopyanalysisconfirmedtheassociationofthewlgphenotypewithchangesintheepicuticularwaxcrystalsoftheseplants.Thephenotypesoffivemutants(7-17A,26.1,524.2,680.2,and843.1)wereconfirmedtobetheresultofsinglerecessivegenemutation.Evaluationofmutantsfrom3(6-1A,7-17A,and11-39A)of11M2familiesrevealedsignificantreductions(>50%)insurfacewaxcontentandincreasesincuticlemembranepermeability.

  • 标签: 蜡质含量 突变体 水稻 表征 鉴定 陆地植物
  • 简介:Theerrorperformanceofcontimuonsphasemodulation(CPM)withtheoptimalcoherentdetectiondependsonitsminimumsquaredEuclideandistance(MSED).Inthispaper,areduced-statetrellisforfullresponseCPMispresentedundertheconditionthattheMSEDisnotreduced.andthereforethecomplexityoftheViterbidecodingisroduced.

  • 标签: Continuous phase modulation Optimal COHERENT detection
  • 简介:Theobjectiveofthisstudyistoidentifysystemparametersfromtherecordedresponseofbaseisolatedbuildings,suchasUSChospitalbuilding,duringthe1994Northridgeearthquake.Fullstatemeasurementsarenotavailableforidentification.Additionally,theresponseisnonlinearduetotheyieldingofthelead-rubberbearings.Twonewapproachesarepresentedinthispapertosolvetheaforementionedproblems.First,areducedorderobserverisusedtoestimatetheunmeasuredstates.Second,aleastsquarestechniquewithtimesegmentsisdevelopedtoidentifythepiece-wiselinearsystemproperties.Theobserverisusedtoestimatetheinitialconditionsneededforthetimesegmentedidentification.Aseriesofequivalentlinearsystemparametersareidentifiedindifferenttimesegments.Itisshownthatthechangeinsystemparameters,suchasfrequenciesanddampingratios,duetononlinearbehaviorofthelead-rubberbearings,arereliablyestimatedusingthepresentedtechnique.Itisshownthattheresponsewasreducedduetoyieldingofthelead-rubberbearingsandperiodlengthening.

  • 标签: USC HOSPITAL building base isolation least
  • 简介:Objectivevideoqualityassessmentmethodsoftenevaluatealltheframesregardlessoftheirimportance.Forwirelessdistortedvideos,noteveryframehasthesamecontributiontothefinaloverallqualityduetothechannelfadingandinterference,whichmayleadtothecapacityvariationintemporal.Besides,withthecontentsimilarityanderrorpropagationpatternintemporaldomain,itispossibletoevaluatetheoverallqualitywithonlypartoftheframes.Inthispaper,ademonstrationisperformedtoshowthatthevideoqualitycanbeevaluatedwithreducedframesset(RFS),andastatetransitionmodelisproposedtoextracttheRFS.Atlast,avideoqualityassessment(VQA)methodiscarriedoutbasedonRFS.Comparedwithseveralstate-of-the-artmethods,ourmethodcanachieveasuitableaccuracywithlessframestobeprocessed.

  • 标签: VQA wireless distortion quality of experience
  • 简介:Theprocessesoffineironorereducedinfluidizedbedhavebeenreviewedinthispaper,thesuperioritiesandlimitationsoftheprocessesofdirectreduction,pre-reductioninfluidizedbedhavealsobeencomprehensivelyanalysed,whichmatcheswithbathsmeltingfurnaceorcokebedtypefurnace.Theanalysishasalsobeenmadeonseveralcontroversialtopics,andthegasuseratiohasbeenpointouttobethekeyofthecompetitionofthereductionprocessinfluidizedbed.Thesuitabilitywithfinalreductionfurnaceisalsoimportanttotheenergysavinginthewholesmeltingreductionprocess.

  • 标签:
  • 简介:IntroductionInGuixiSmelter,copperanodeslimewastreatedbymeansoftechnologicalprocesofvolatilizingSeinarotarykiln,pickingcoppe...

  • 标签: PT and PD DISPLACEMENT OPTIMIZATION
  • 简介:Magneticreducedgrapheneoxide(MRGO)nanocompositewaspreparedbythechemicalcoprecipitationmethodandappliedasadsorbentforremovingemulsifiedoilfromoilywastewater.SEM,TEM,XRD,FT-IR,VSMandotheranalyticalmethodswereutilizedtocharacterizethepreparedMRGO.TheadsorptionperformanceofMRGOwasevaluatedunderdifferentinitialadsorbateconcentration,MRGOdosage,temperature,andpHvalueofthesolution.Theadsorptionkineticsandisothermswereinvestigated.Inaddition,theMRGOrepeatabilitywasalsotested.Itwasfoundthatalmost65%ofemulsifiedoilwereremovedbyMRGOinthefirst15min.TheMRGOadsorptioncapacityandefficiencyforremovalofadsorbatereached335.85mg/gand92.52%within60min,respectively.TheadsorptioncapacityreducedwithanincreasingMRGOdosage,whileincreasedwiththeincreaseofemulsifiedoilconcentration.TheadsorptionperformanceofMRGOinthealkalineenvironmentwaslowerthanthatintheacidicenvironment.Theadsorptiondatacouldwellfittothepseudosecond-ordermodel.TheLangmuirmodelcouldwelldescribetheisothermdata.TheMRGOadsorptioncapacitywasstillmorethan236.1mg/gatthesixthregenerationcycle.

  • 标签: MAGNETIC REDUCED graphene oxide NANOCOMPOSITES adsorption
  • 简介:在这份报纸,我们在一个减少的形式模型与counterparty信用风险学习大祸选择的价格。我们假设损失过程被一个二倍地随机的泊松过程产生,股票价格过程通过被相关到损失过程,利率过程和缺省的一个跳散开过程被建模紧张过程通过Vasicek模型被建模。我们在一个减少的形式模型为定价大祸选择导出关上的形式公式。而且,我们在明确的公式上使一些成为数字分析。

  • 标签: 定价 大祸选择 counterparty 风险 措施变化 减少的形式模型
  • 简介:瞄准:在人的肝细胞癌(HCC)检验E-cadherin的免疫反应和catenin家庭的四种子类型并且调查在HCC病人的E-cadherin/catenin复杂、临床病理的参数的表示之间的关联。方法:免疫为E-cadherin和catenins的组织化学的学习在HCC的97个修理福尔马林的、嵌入石蜡的标本上被执行。结果:E-cadherin的减少的表示,alpha-,贝它--,gamma-catenin和p120分别地在69%,76%,63%,71%和73%被观察。E-cadherin和catenin部件的两表示显著地与肿瘤等级被相关(P=0.000)。它显示出在catenin成员和肿瘤舞台的表示之间的有效差量(P=0.003,P=0.017,P=0.007并且P=0.000,分别地)。在HCC的E-cadherin的减少的表示显著地与肝内转移(IM)和胶囊的侵略被相关(P=0.008,P=0.03,分别地)。靠近的关联也在catenins和肿瘤尺寸的表示之间被观察(P=0.002,P=0.034,P=0.016并且P=0.000,分别地)。另外,每catenin的表示被发现与IM相关(P=0.012,P=0.049,P=0.026并且P=0.014,分别地)。不,统计上,有效差量在E-cadherin/catenin建筑群和淋巴节点允许的表达式水平之间被观察,脉管的侵略和卫星小瘤。有趣地,仅仅p120的表示与法新社价值显示出关联(P=0.035)。E-cadherin的表示与alpha-一致,贝它--,gamma-catenin和p120表示(P=0.000)。最后,E-cadherin/catenin建筑群的反常表示显著地与病人的幸存被联系(P=0.0253,P=0.0052,P=0.003,P=0.0105并且P=0.0016,分别地)。不过,E-cadherin/catenin建筑群的部件都不是HCC病人的独立预示的因素。结论:E-cadherin,catenins和p120的下面调整的表达式在HCC经常发生并且贡献肿瘤的前进和开发。检测复杂的E-cadherin/catenin的合作表示可以比在预言肿瘤侵略,转移和病人是幸存探索他们之一是准确、珍贵的更多。

  • 标签: 肝细胞癌 组织学特征 基因表达 生存率
  • 简介:在2013年6月,美国国家安全机构分别地建议了小块零,叫的SIMON和斑点的二个家庭。这些零被设计在硬件和软件平台上最优地表现。在这份报纸,我们主要在SIMON的各种各样的版本上介绍零关联的线性密码翻译法。由使用missin-the-middle途径,第一,我们构造零关联的线性distinguishersSIMON,和零关联的线性攻击基于关键恢复的小心的分析被介绍阶段。第二,多维的零关联的线性攻击被用来减少数据复杂性。我们的零关联的线性攻击比不可能的微分攻击求婚由的更好表现卧病在床等。在ePrint报告2013/568。最后,我们也使用divide-and-conquer技术改进Javad等建议的线性密码翻译法的结果。在ePrint报告2013/663。

  • 标签: 线性密码分析 零相关 缩减 线性攻击 分组密码 国家安全
  • 简介:Inthispaper,weextendtheapplicationsofproperorthogonaldecomposition(POD)method,i.e.,applyPODmethodtoamixedfiniteelement(MFE)formulationnaturallysatisfiedBrezz-Babuskaforparabolicequations,establishareduced-orderMFEformulationwithlowerdimensionsandsufcientlyhighaccuracy,andprovidetheerrorestimatesbetweenthereduced-orderPODMFEsolutionsandtheclassicalMFEsolutionsandtheimplementationofalgorithmforsolvingreduced-orderMFEformulation.Somenumericalexamplesillustratethefactthattheresultsofnumericalcomputationareconsistentwiththeoreticalconclusions.Moreover,itisshownthatthenewreduced-orderMFEformulationbasedonPODmethodisfeasibleandefcientforsolvingMFEformulationforparabolicequations.

  • 标签: MFE POD 降阶 抛物方程 配方 抛物型方程
  • 简介:AbstractBackground:School closure is a common mitigation strategy during severe influenza epidemics and pandemics. However, the effectiveness of this strategy remains controversial. In this study, we aimed to explore the effectiveness of school closure on seasonal influenza epidemics in provincial-level administrative divisions (PLADs) with varying urbanization rates in China.Methods:This study analyzed influenza surveillance data between 2010 and 2019 provided by the Chinese National Influenza Center. Taking into consideration the climate, this study included a region with 3 adjacent PLADs in Northern China and another region with 4 adjacent PLADs in Southern China. The effect of school closure on influenza transmission was evaluated by the reduction of the effective reproductive number of seasonal influenza during school winter breaks compared with that before school winter breaks. An age-structured Susceptible-Infected-Recovered-Susceptible (SIRS) model was built to model influenza transmission in different levels of urbanization. Parameters were determined using the surveillance data via robust Bayesian method.Results:Between 2010 and 2019, in the less urbanized provinces: Hebei, Zhejiang, Jiangsu and Anhui, during school winter breaks, the effective reproductive number of seasonal influenza epidemics reduced 14.6% [95% confidential interval (CI): 6.2-22.9%], 9.6% (95% CI: 2.5-16.6%), 7.3% (95% CI: 0.1-14.4%) and 8.2% (95% CI: 1.1-15.3%) respectively. However, in the highly urbanized cities: Beijing, Tianjin and Shanghai, it reduced only 5.2% (95% CI: -0.7-11.2%), 4.1% (95% CI: -0.9-9.1%) and 3.9% (95% CI: -1.6-9.4%) respectively. In China, urbanization is associated with decreased proportion of children and increased social contact. According to the SIRS model, both factors could reduce the impact of school closure on seasonal influenza epidemics, and the proportion of children in the population is thought to be the dominant influencing factor.Conclusions:Effectiveness of school closure on the epidemics varies with the age structure in the population and social contact patterns. School closure should be recommended in the low urbanized regions in China in the influenza seasons.

  • 标签: School closure Influenza epidemics Urbanization Contact China