简介:BasedonarelativisticquarkmodelapproachwithaneffectivepotentialU(r)=(ac/2)(1+γ0)r2,thespincontentofthenucleonisinvestigated.Pseudo-scalarinteractionbetweenquarksandGoldstonebosonsisemployedtocalculatethecouplingsbetweentheGoldstonebosonsandthenucleon.Differentapproachestodealwiththecenterofmasscorrectionintherelativisticquarkpotentialmodelapproacharediscussed.
简介:Anewalgorithmofnonuniformitycorrectionforinfraredfocalplanearray(IRFPA)isreported,whichisacombinedalgorithmbasedonboththetwo-pointcorrectionandartificialneuralnetworkscorrection.Thecombinedalgorithmiscalibratedbytwo-pointcorrection,andthecalibratedcorrectioncoefficientsareautomaticallymodifiedbyBPalgorithm.Soitisnotonlycalibrated,butalsoreal-timeprocessed.Inadaptivenonuniformitycorrectionalgorithm,thephenomenaghostartifactandtargetfade-outareavoidedbyedgeextraction.Inordertogetintensifiedimage,themodifiedmedianfiltersareadopted.Thesimulateddataindicatestheproposedschemeisaneffectivealgorithm.
简介:介绍进散开张肌图象(DTI)的Rician噪音能在追踪的张肌计算和纤维以后带严肃的影响。减少Rician噪音的效果,我们建议认为基于小浪的散开方法降噪多信道的打的散开加权(DW)图象。当保存质地和边时,介绍变光滑的策略,在小浪领域利用各向异性的非线性的散开,成功地移开噪音。为了评估份量上,在为介绍进DW图象,peak-to-peaksignal-to-noise比率(PSNR)和signal-to-mean的Rician噪音的财务的介绍方法的效率摆平错误比率(SMSE)度量标准被采用。基于合成、真实的数据,我们计算了明显的散开系数(模数转换器)并且追踪了纤维。我们做了在介绍模型,波浪收缩和调整非线性的散开变光滑方法之间的比较。所有实验结果证明份量上并且视觉上介绍过滤器的更好的表演。
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简介:Toimprovetheperformanceoftransmissionbyreducingthenumberoftransmissionandnetworkoverheadofwirelesssingle-hopnetworks,thispaperpresentsahighefficientmultipacketdecodingapproachfornetworkcoding(EMDNC)inwirelessnetworksaccordingtotheideaofencodingpacketswhichcannotbedecodedandarestoredinbufferbyreceivingnodes,thelostpacketscanberecoveredfromtheseencodedpackets.Comparedwiththenetworkcodingwirelessbroadcastingretransmission(NCWBR),EMDNCcanimprovetheefficiencyofdecodingandreducethenumberofretransmissionandtransmissiondelay.SimulationresultsrevealthatEMDNCcaneffectivelyreducethenumberofretransmissionandnetworkoverhead.
简介:语篇语言学与翻译研究,进而讨论翻译研究的语篇语言学方法以及语篇翻译研究的范围、研究重点以及研究方法,即翻译研究的语篇语言学方法
简介:Algorithmsusedindataminingandbioinformaticshavetodealwithhugeamountofdataefficiently.Inmanyapplications,thedataaresupposedtohaveexplicitorimplicitstructures.Todevelopefficientalgorithmsforsuchdata,wehavetoproposepossiblestructuremodelsandtestifthemodelsarefeasible.Hence,itisimportanttomakeacompactmodelforstructureddata,andenumerateallinstancesefficiently.Therearefewgraphclassesbesidestreesthatcanbeusedforamodel.Inthispaper,weinvestigatedistance-hereditarygraphs.Thisclassofgraphsconsistsofisometricgraphsandhencecontainstreesandcographs.First,acanonicalandcompacttreerepresentationoftheclassisproposed.Thetreerepresentationcanbeconstructedinlineartimebyusingprefixtrees.Usually,prefixtreesareusedtomaintainasetofstrings.Inouralgorithm,theprefixtreesareusedtomaintaintheneighborhoodofvertices,whichisanewapproachunlikethelexicographicallybreadth-firstsearchusedinotherstudies.Basedonthecanonicaltreerepresentation,efficientalgorithmsforthedistance-hereditarygraphsareproposed,includinglineartimealgorithmsforgraphrecognitionandgraphisomorphismandanefficientenumerationalgorithm.Anefficientcodingforthetreerepresentationisalsopresented;itrequires[3.59n]bitsforadistance-hereditarygraphofnverticesand3nbitsforacograph.Theresultsofcodingimprovepreviouslyknownupperbounds(bothare2~(O(nlogn)))ofthenumberofdistance-hereditarygraphsandcographsto2~([3.59n])and2~(3n),respectively.
简介:平淡的波浪重叠途径不能在一块协调的声学的地的重建和预言被使用,因为分开单个来源产生的压力是不可能的。根据协调的声学的地的重叠理论,一个新奇方法基于联合波浪重叠途径被开发重建并且由造匹配在全息图表面和来源之间的矩阵的联合压力预言协调的声学的地。方法能重建个人的表面的声学的信息采购原料,并且预言也从每来源和全部的协调的声学的地罐头散发的声学的地自发地被计算是可能的。试验性、数字的模拟结果证明这个方法能有效地解决holographic重建和协调的声学的地的预言,它能也被用作一种协调的声学的地分离技术。这个新奇方法上的学习扩大声学的雷射摄影术技术的应用程序范围。
简介:Inthispapertheprocessofknowledgeaccumulationforaparticulartechnologyisstudied.Twocountries,saythetechnologyfollowerandthetechnologyfrontier,areconsidered.Thefrontier’sknowledgegrowthisdeterminedbyitsR&Deffortsonthetechnology.ThelevelofknowledgestockforthefollowercountryisaugmentedbyitsR&Dactivitiesforthetechnologyandabsorbingsomeoftheexternalknowledgethroughspilloverfromthefrontier.Theextenttowhichthefollowerisabletoexploittheexternalknowledgedependsontechnologicalgap,absorptivecapacity,absorptiontimeanddegreeofspillover.Newconceptssuchasnaturalandenhanceddegreeofspillover,backgroundandinnovativeknowledgeandabsorptionspeedareintroducedinthepresentworktodeeplyexploretheprocessofknowledgespillover.ThefactorsinfluencingtheknowledgedevelopmentinthelongtermaresimultaneouslystudiedinanintegratedstructureprovidedbytheSystemDynamicsapproach.Thisframeworkshowstheresponsestothechangesandprovidesthebasisforexaminingtheinteractionsamongthevariablesovertime.
简介:Calibratingasmallfieldcameraisachallengingtaskbecausethetraditionaltargetwithvisiblefeaturepointsthatfitthelimitedspaceisdifficultandcostlytomanufacture.Wedemonstrateanovelcombinedtargetusedincameracalibration.Thetangentpointssuppliedbyonecirclelocatedatthecenterofasquareareusedasinvisiblefeatures,andtheperspectiveprojectioninvarianceisproved.Bothvisibleandinvisiblefeaturesextractedbytheproposedfeatureextractionalgorithmareusedtosolvethecalibration.Thetargetsuppliesasufficientnumberoffeaturepointstosatisfytherequirementsofcalibrationwithinalimitedspace.Experimentsshowthattheapproachcanachievehighrobustnessandconsiderableaccuracy.Thisapproachhaspotentialforcomputervisionapplicationsparticularlyinsmallfieldsofview.
简介:Ageometricframeworkisproposedfornonlinearmodelswithrantiomeffects,basedonamodifiedversionofthegeometricstructurepresentedbyBates&Wattes(1980).Thisgeometricframeworkisusedtostudysomeasymptoticinferenceintermsofcurvaturesfornonlinearregressionmodelswithrandomeffects.Severalpreviousresultsareextended.