简介:Cellulasesareimportantglycosylhydrolases(GHs)thathydrolyzecellulosepolymersintosmalleroligosaccharidesbybreakingthecelluloseβ(1→4)bonds,andtheyarewidelyusedtoproducecellulosicethanolfromtheplantbiomass.N-linkedandO-linkedglycosylationswereproposedtoimpactthecatalyticefficiency,cellulosebindingaffinityandthestabilityofcellulasesbasedonobservationsofindividualcellulases.Asfarasweknow,therehasnotbeenanysystematicanalysisofthedistributionsofN-linkedandO-linkedglycosylatedresiduesincellulases,mainlyduetothelimitedannotationsoftherelevantfunctionaldomainsandtheglycosylatedresidues.Wehavecomputationallyannotatedthefunctionaldomainsandglycosylatedresiduesincellulases,andconductedasystematicanalysisofthedistributionsoftheN-linkedandO-linkedglycosylatedresiduesintheseenzymes.ManyN-linkedglycosylatedresidueswereknowntobeintheGHdomainsofcellulases,buttheyarethereprobablyjustbychance,sincetheGHdomainusuallyoccupiesmorethanhalfofthesequencelengthofacellulase.OuranalysisindicatesthattheO-linkedglycosylatedresiduesaresignificantlyenrichedinthelinkerregionsbetweenthecarbohydratebindingmodule(CBM)domainsandGHdomainsofcellulases.Possiblemechanismsarediscussed.
简介:Aclassoflarge-sealesystems,wheretheoverallobjectivefunctionisanonlinearfunctionofperformanceindexofeachsubsystem,isinvestigatedinthispaper.Thistypeoflarge-scalecontrolproblemisnon-separableinthesenseofconventionalhierarchicalcontrol.Hierarchicalcontrolisextendedinthepapertolarge-scalenon-separablecontrolproblems,wheremultiobjectiveoptimizationisusedasseparationstrategy.Thelarge-scalenon-separablecontrolproblemisembedded,under;ertainconditions,intoafamilyoftheweightedLagrangianformulation.TheweightedLagrangianformulationisseparablewithrespecttosubsystemsandcanbeeffectivelysolvedusingtheinteractionbalanceapproachatthetwolowerlevelsintheproposedthree-levelsolutionstructure.Atthethirdlevel,theweightingvectorfortheweightedLagrangianformulationisadjustediterativelytosearchtheoptimalweightingvectorwithwhichtheoptimaloftheoriginallarge-scalenon-separablecontrolproblemisobtained.Theoreticalbaseofthealgorithmisestablished.Simulationshowsthatthealgorithmiseffective.
简介:Large-scaleMIMO(multiple-inputmultiple-output)systemswithnumerouslow-powerantennascanprovidebetterperformanceintermsofspectrumefficiency,powersavingandlinkreliabilitythanconventionalMIMO.Forlarge-scaleMIMO,thereareseveraltechnicalissuesthatneedtobepracticallyaddressed(e.g.,pilotpatterndesignandlow-powertransmissiondesign)andtheoreticallyaddressed(e.g.,capacitybound,channelestimation,andpowerallocationstrategies).Inthispaper,weanalyzethesumrateupperboundoflarge-scaleMIMO,investigateitskeytechnologiesincludingchannelestimation,downlinkprecoding,anduplinkdetection.Wealsopresentsomeperspectivesconcerningnewchannelmodelingapproaches,advanceduserschedulingalgorithms,etc.
简介:尽管有在中国喷雾器上增加注意,从来没有它的一般特征的遍及全国的调查。这份报纸在23个地点为喷雾器论述元素的数据在并且在中国附近,主要从文学,和表演绘画一些大规模模式。艾尔,Na,和Se被用来代表外壳,水兵,和污染部件分别地。大多数模式在SWNE被排列。分别地,艾尔和Na对NW和SE最高级,他们的比率变化很快接近海岸。Se从NW日益增多地在华中,和Se/Al比率(污染对外壳的喷雾器的指示物)增加上有宽广最大值到SE。为模仿污染喷雾器的一个简单索引,使用人口密度,年度降水,和吝啬的风速度,足够地复制污染喷雾器的大规模模式并且显示出在NW的外壳的艾尔怎么逐渐地向SE让路给flyash艾尔。
简介:与超级计算机的快速的开发,规模和复杂性曾经正在增加,并且可靠性和跳回面临更大的挑战。在容错有许多重要技术,例如基于差错预言的积极失败回避技术,反应容错基于检查点,和安排技术到改进可靠性。系统差错的特征上的质、量的描述为这些技术是很批评的。这研究在超级计算机把SunwayBlueLight称为的二典型petascale上分析失败的来源(基于多核心中央处理器)并且SunwayTaihuLight(基于异构的manycore中央处理器)。它揭开一些有趣的差错特征并且在主要部件差错之中发现未知关联关系。最后,纸在资源和不同时间跨度的各种各样的谷物分析二台超级计算机的失败时间,并且为petascale超级计算机造一个一致多维的失败时间模型。
简介:Asimplecriterionfordelay-independentstabilityoflarge-scalelineartime-varyingsystemsisdeducedbyemployingatypeofLyapunoyfunction.Thenotablefeaturesoftheresultsinthispaperareitssimplicityandefficiencyintestingthestabilitylarge-scalelineartime-varyingsystems.Someillustrativeexamplesaregiventodemonstratetheadvantagesoftheobtainedresultsoverthoseinliterature.
简介:Inthepreprocessingphase,theglobalterrainmodelispartitionedintoblockswiththeirfeaturepointsbeingpickedouttogenerateTINmodelforeachterrainblock,thenthemulti-resolutionmodelsofterrainorganizedintheformofquad-treeiscreatedbottom-up.Cracksbetweenterrainblocksareavoidedbyinsertingverticestoformcommonboundaries.Atrun-time,aview-dependentLODalgorithmisusedtocontroltheloadingandunloadingoftheproperblocksbyanadditionalsynchronousthread.ToeliminatetheartifactscreatedbyLODtransitions,geomorphingisusedinreal-time.TheserenderingstrategiesincreasethethroughputofGPUandavoidimbalanceofloadamongCPU,GPUandDiskI/O.Experimentalresultsshowthatthesystemcanperformvisuallysmoothrenderingoflarge-scaleterrainsceneswithfinequalityatanaveragerateof80fps.
简介:Longwavesgeneratedbyamovingatmosphericpressuredistribution,associatedwithastorm,incoastalregionareinvestigatednumerically.Forsimplicitythemovingatmosphericpressureisassumedtobemovingonlyinthealongshoredirectionandthebeachslopeisassumedtobeaconstantintheon-offshoredirection.Bysolvingthelinearshallowwaterequationsweobtainnumericalsolutionsforawiderangeofphysicalparameters,includingstormsize(2a),stormspeed(U),andbeachslope(α).Basedonthenumericalresults,itisdeterminedthatedgewavepacketsaregeneratedifthestormspeedisequaltoorgreaterthanthecriticalvelocity,Ucr,whichisdefinedasthephasespeedofthefundamentaledgewavemodewhosewavelengthisscaledbythewidthofthestormsize.ThelengthandthelocationofthepositivelymovingedgewavepacketisroughlyUt/2≤y≤Ut,whereyisinthealongshoredirectionandtisthetime.Oncetheedgewavepacketisgenerated,thewavelengthisthesameasthatofthefundamentaledgewavemodecorrespondingtothestormspeedandisindependentofthestormsize,whichcan,however,affectthewaveamplitude.Whenthestormspeedislessthanthecriticalvelocity,theprimarysurfacesignatureisadepressiondirectlycorrelatedtotheatmosphericpressuredistribution.
简介:Simulationandrenderingoflarge-scalenaturalenvironments,especiallytheocean,hasalwaysbeenoneofthehotissuesincomputergraphics,whichcanproviderealismforvariousapplicationssuchascomputergame,movieandmilitaryusage.Simulationofoceanenvironmentisoftenlackofrealismforreal-timeapplicationduetoitscomplexityofdynamicwaves.Inthispaper,amethodbasedonFFTWavemodelisproposedtosolvethisproblem,whichcanalsosimulatetheoceanopticpropertywithatmospherescattering.Furthermore,ourmethodhasalotofadvantagesincludingglobaloceandatasetsupport,real-time,dynamicreflectionofocean,thefoamonthewave,smoothtransitionfromdeepoceantoseacoast,etc.Theexperimentalresultsdemonstratetherealismandeffectivenessofourapproach.
简介:Efficientestimationofpopulationsizeisacommonrequirementformanywirelesssensornetworkapplications.Examplesincludecountingthenumberofnodesaliveinthenetworkandmeasuringthescaleandshapeofphysicallycorrelatedevents.Thesetasksmustbeaccomplishedatextremelylowoverheadduetothesevereresourcelimitationofsensornodes,whichposesachallengeforlarge-scalesensornetworks.Inthisarticlewedesignanovelmeasurementtechnique,FLAKEbasedonsparsesamplingthatisgeneric,inthatitisapplicabletoarbitrarywirelesssensornetworks(WSN).Itcanbeusedtoefficientlyevaluatesystemsize,scaleofevent,andotherglobalaggregatingorsummationinformationofindividualnodesoverthewholenetworkinlowcommunicationcost.Thisfunctionalityisusefulinmanyapplications,buthardtoachievewheneachnodehasonlyalimited,localknowledgeofthenetwork.Therefore,FLAKEiscomposedoftwomaincomponentstosolvethisproblem.OneistheInjectedRandomDataDissemination(Sampling)method,theotherissparsesamplingalgorithmbasedonInverseSampling,uponwhichitimprovesbyachievingatargetvariancewithsmallerrorandlowcommunicationcost.FLAKEusesapproximatelyuniformrandomdatadisseminationandsparsesamplinginsensornetworks,whichisanunstructuredandlocalizedmethod.Atlastweprovideexperimentalresultsdemonstratingtheeffectivenessofouralgorithmonbothsmall-scaleandlarge-scaleWSNs.Ourmeasurementtechniqueappearstobethepracticalandappropriatechoice.
简介:Thispaperpresentsanewdecompositionmethodforsolvinglarge-scalesystemsofnonlinearequations.ThenewmethodisofsuperlinearconvergencespeedandhasratherlesscomputationalcomplexitythantheNewton-typedecompositionmethodaswellasotherknownnumericalmethods,Primalnumericalexperimentsshowthesuperiorityofthenewmethodtotheothers.
简介:Afamilyofarraycodeswithamaximumdistanceseparable(MDS)property,namedLcodes,isproposed.ThegreateststrengthofLcodesisthatthenumberofrows(columns)inadiskarraydoesnotberestrictedbytheprimenumber,andmorediskscanbedynamicallyappendedinarunningstoragesystem.Lcodescantolerateatleasttwodiskerasuresandsomesectorlosssimultaneously,andcantoleratemultiplediskerasures(greaterthanorequaltothree)underacertaincondition.BecauseonlyXORoperationsareneededintheprocessofencodinganddecoding,LcodeshaveveryhighcomputingefficiencywhichisroughlyequivalenttoXcodes.AnalysisshowsthatLcodesareparticularlysuitableforlarge-scalestoragesystems.
简介:Inthispaper,theeddycoefficientandthetreatmentfordividinglayersofEstoque’snumericalmodelinmodernPBLdynamicshavebeenappliedtoderiveorder-zeroandorder-oneanalyticsolutionsoverlarge-scaletopography,thesolutionsareusedtoobtainthedivergenceandverticalvelocity,improvingthepreviousresults.
简介:De-duplicationusingbiometricshasgainedmuchattentionfromresearchcommunitiesasitprovidesauniqueidentityforeachandeveryindividualamongthelargepopulation.De-duplicationistheprocessofremovingtheinstancesofmultipleenrollmentsbythesamepersonusingtheperson’sbiometricdata.Animportantissueinthelarge-scalede-duplicationapplicationsisthespeedofmatchingandtheaccuracyofthematchingbecausethenumberofpersonstobeenrolledrunsintomillions.Thispaperpresentsanefficientmethodtoimprovetheaccuracyoffingerprintde-duplicationinde-centralizedmanner.De-duplicationaccuracydecreasesbecauseofthenoisepresentinthedata,whichwouldcauseimproperslapfingerprintsegmentation.Inthispaper,anattemptismadetoremovethenoisepresentinthedatabyusingbinarizationofslapfingerprintimagesandregionlabelingofdesiredregionswith8-adjacencyneighborhood.Thedistinctfeatureofthistechniqueistoremovethenoisepresentinthedataforanaccurateslapfingerprintsegmentationandimprovethede-duplicationaccuracy.Experimentalresultsdemonstratethatthefingerprintsegmentationrateandde-duplicationaccuracyareimprovedsignificantly.
简介:Thispapermakesastudyontheinteractivedigitalgener-alization,wheremapgeneralizationcanbedividedintointellectivereason-ingprocedureandoperationalproce-dure,whicharedonebyhumanandcomputer,respectively.Andaninter-activemapgeneralizationenvironmentforlargescaletopographicmapisthendesignedandrealized.Thisresearchfocuseson:①thesignificanceofre-searchinganinteractivemapgenerali-zationenvironment,②thefeaturesoflargescaletopographicmapandinter-activemapgeneralization,③thecon-structionofmapgeneralization-orien-teddatabaseplatform.
简介:大规模膜结构的导致风的回答,博览会大街,在这研究被评估。为了在房顶上获得风压力分发,出现,风隧道测试被执行。膜房顶上的风压力的简短分析首先被进行然后结构的导致风的回答的分析在时间领域用一个数字不可分的方法被执行。在计算的过程,几何非线性被考虑。结果显示那个平均数,RSM和当来临的流动速度增加时,回答非线性地增加的结构的山峰价值。强壮的非线性的特征在排水量回答被观察,而节的应力和电报的回答轴的力量看最小的非线性的性质膜结构什么时候被使遭到弯屈负担。因为背景部件是全部的动态反应的主导的部分,反响的部件是太小的,抑制比率的不同价值仅仅在结构的RSM反应上有最小的影响。作为从0.02~0.05的抑制比率增加,垂直排水量,节的压力和电报的RMS回答在8.1%,6.7%和17.9%的轴的力量减少分别地。因为吝啬的部件在导致风的反应起一个重要作用,阵风反应因素的价值不为博览会大街高。