简介:Akindofnovelbinaryphasecodenamedsidelobesuppressioncodeisproposedinthispaper.Itisdefinedtobethecodewhosecorrespondingoptimalsidelobesuppressionfilteroutputstheminimumsidelobes.Itisshownthattheredoexistsidelobesuppressioncodesbetterthantheconventionaloptimalcodes-Barkercodes.Forexample,thesidelobesuppressioncodeoflength11withfilteroflength39hasbettersidelobelevelupto17dBthanthatofBarkercodewiththesamecodelengthandfilterlength.
简介:改进了并置的超级正向纠错(super-FEC)的三个新奇计划代码在长拖光传输系统的发展趋势和存在FEC代码的缺点以后被建议被分析了。芦苇贤明之人(RS)+Bose-Chaudhuri-Hocguenghem(BCH)的性能模拟内部外部的连续并置的代码被实现,编码/译码并置平行的代码的概念被介绍。而且,模拟为RS结果(255,239)+RS(255,239)代码和theRS(255,239)+RS(255,223)二连续并置的代码是有这的一个优异编码方案的代码表演与经典RS相比作为更好的纠错,中等冗余性和容易的实现有利(255,239)代码和其它代码,并且他们的信号噪声比获得是分别地多于RS的2~3dB(255,239)在1x10~的误码率的代码(-13)。最后,新奇连续并置的代码的帧结构被安排在设计它的硬件打一个坚挺的基础。
简介:Theorganizationofthecanonicalgeneticcodeneedstobethoroughlyilluminated.Herewereorderthefournucleotides-adenine,thymine,guanineandcytosine-accordingtotheiremergenceinevolution,andapplytheorganizationalrulestodevisinganalgebraicrepresentationforthecanonicalgeneticcode.Underaframeworkofthedevisedcode,wequantifycodonandaminoacidusagesfromalargecollectionof917prokaryoticgenomesequences,andassociatetheusageswithitsintrinsicstructureandclassificationschemesaswellasaminoacidphysicochemicalproperties.Ourresultsshowthatthealgebraicrepresentationofthecodeisstructurallyequivalenttoacontent-centricorganizationofthecodeandthatcodonandaminoacidusagesunderdifferentclassificationschemeswerecorrelatedcloselywithGCcontent,implyingasetofrulesgoverningcompositiondynamicsacrossawidevarietyofprokaryoticgenomesequences.Theseresultsalsoindicatethatcodonsandaminoacidsarenotrandomlyallocatedinthecode,wherethesix-folddegeneratecodonsandtheiraminoacidshaveimportantbalancingrolesforerrorminimization.Therefore,thecontent-centriccodeisofgreatusefulnessindecipheringitshithertounknownregularitiesaswellasthedynamicsofnucleotide,codon,andaminoacidcompositions.
简介:Industryexpertsareincreasinglyfocusingonteamproductivityonteamproductivityasthekeytosuccess,thebaseoftheteameffortisthefour-foldstructureofsoftwareintermsoflogicalorganisation,physicalorganisation,managerialorganisation,anddynamicalstructure.WedescribetheideasputintoactionwithintheCMSsoftwarefororganisingsoftwareintosub-systemsandpackages,andtoestablishconfigurationmanagementinamultiprojectenvironment.Weuseastructurethatallowstomaximisetheindependenceofsoftwaredevelopmentinindividualareas,andatthesametimeemphasisestheoverwhelmingimportanceoftheinterdependenciesbetweenthepackagesandcomponentsinthesystem.Wecommentonreleaseprocedures,anddescribetheinter-relationshipbetweenrelease,development,integration,andtesting.
简介:WeknowthatforacodeC,it‘sveryimportanttofindouttheAutomorphismgroupAutCofC.However,itisverydifficulttoseekentireAutC.Inthispaper,usingtheG.Iofmatricesoverafinitefield,wegiveseveralmethodstojudgewhetherapermutationσ∈S_n.(Symmetricgroup)belongstoAutCornot.Theyarehelpfulforthepurposetoex-
简介:mc2llvmisaprocess-levelARM-to-x86binarytranslatordevelopedinourlabinthepastseveralyears.Currently,itisabletoemulatesinglethreadedprograms.Weextendmc2llvmtoemulatemulti-threadedprograms.Ourmaintaskistoreconstructitsarchitectureformulti-threadedprograms.Registermapping,codecachemanagement,andaddressmappinginmc2llvmhaveallbeenmodified.Inaddition,tofurtherspeeduptheemulation,wecollecthotpaths,aggressivelyoptimizeandgeneratecodeforthematruntime.Additionalthreadsareusedtoalleviatetheoverhead.Thus,whenthesamehotpathiswalkedthroughagain,thecorrespondingoptimizednativecodewillbeexecutedinstead.Inourexperiments,oursystemis8.8XfasterthanQEMU(quickemulator)onaveragewhenemulatingthespecifiedbenchmarkswith8guestthreads.
简介:这被相信在RNA世界上运作(ribozymes)并且参考(riboscripts)RNA分子被创造与仅仅三(腺苷,uridine,和海鸟粪正弦)并且二(腺苷和uridine)nucleosides,分别地以便遗传密码开始了不复杂。随后发展能剪贴自己和riboscripts的Ribozymes对严密编辑善于接受(到肌甙的腺苷);RNA分子的集中的多样化塑造了能够polymerizing氨基酸的新奇细胞的机械—细胞的大楼材料的一种新类型永久。开始,遗传密码,编码七氨基酸,仅仅被创造区分嘌呤和嘧啶;它以后以编码12,15,和20的一个逐步的方法被扩展通过从它的角色的鸟嘌呤的消除的氨基酸作为运作的信号并且通过胞嘧啶的招募。因此,遗传密码的成熟也与一致与(1)从初发的翻译机械的aminoacyl-tRNA(AARS)的离开,(2)由DNA的参考RNA的代替,并且(3)AARS的合作进化和他们的血缘的tRNAs。这个模型由DNA预言做RNA的分子的机制,由蛋白质的细胞的过程,和参考利用的渐渐的代替。
简介:Thecodontableforthecanonicalgeneticcodecanberearrangedinsuchawaythatthecodeisdividedintofourquartersandtwohalvesaccordingtothevari-abilityoftheirGCandpurinecontents,respectively.Forprokaryoticgenomes,whenthegenomicGCcontentincreases,theiraminoacidcontentstendtoberestrictedtotheGC-richquarterandthepurine-contentinsensitivehalf,whereallcodonsarefourfolddegenerateandrelativelymutation-tolerant.Conversely,whenthegenomicGCcontentdecreases,mostofthecodonsretracttotheAU-richquarterandthepurine-contentsensitivehalf;mostofthecodonsnotonlyremainencodingphysicochemicallydiversifiedaminoacidsbutalsovarywhentransversion(betweenpurineandpyrimidine)happens.Aminoacidswithsixfold-degeneratecodonsaredistributedintoallfourquartersandacrossthetwohalves;theirfourfold-degeneratecodonsareallpartitionedintothepurine-insensitivehalfinfavoriteofrobustnessagainstmutations.Thefeaturesmanifestedinthere-arrangedcodontableexplainmostoftheintrinsicrelationshipbetweenproteincodingsequences(theinformationalcontent)andaminoacidcompositions(thefunctionalcontent).Therenovatedcodontableisusefulinpredictingabundantaminoacidsandpositioningtheaminoacidswithrelatedordistinctphysicochem-icalproperties.
简介:在靠近范围的摄影测量学,3D信息获得基于图象匹配。代码标记的应用程序帮助改进自动匹配和匹配的精确性的水平。这份报纸调查惯性椭圆算法的应用程序编码标记匹配。我们能与某个边界计算一个目标的惯性椭圆。首先,方法被用于一个单个代码标记;角度并且可伸缩是有效的。然后,纸介绍多编码由惯性椭圆匹配方法的标记。旋转和同形异义图象的可伸缩的变化能被惯性椭圆算法计算。这些参数能被用于在任意的态度匹配靠近范围的摄影测量学的代码标记。
简介:在一个复杂不规则的区域把信息标记是在表金属和将部分地有益的家具工业经常发生的一个有用过程管理。快基于代码的labeler(FCBL)被建议在这篇论文完成这个目的。区域是第一discretized,然后由1D代码由为提供2D编码技术的弗里曼编码地区性的信息,冗余性省略了。我们提高编码计划为我们的复杂问题使它更合适。基于代码,寻找算法被设计并且能与设定的限制被扩大。由介绍一个聪明的最佳的方向评价,另外,FCBL的标记的速度和精确性显著地被改进。有从工业工厂获得的真实数据的一个大范围的实验表明稳定性和FCBL的毫秒级的速度。建议方法集成于一个造船CAD系统,并且在把进程标记的轮船部分起一个很重要的作用。
简介:Inordertoimplementlarge-scaleandhigh-betatokamaksimulation,anewalgorithmoftheelectromagneticgyrokineticPIC(particle-in-cell)codewasproposedandinstalledontheGpic-MHDcode[GyrokineticPICcodeformagnetohydrodynamic(MHD)simulation].Inthenewalgorithm,thevorticityequationandthegeneralizedOhm’slawalongthemagneticfieldarederivedfromthebasicequationsofthegyrokineticVlasov,Poisson,andAmperesystemandareusedtodescribethespatio-temporalevolutionofthefieldquantitiesoftheelectrostaticpotentialφandthelongitudinalcomponentofthevectorpotentialAz.Thebasicalgorithmisequivalenttosolvingthereduced-MHD-typeequationswithkineticcorrections,inwhichMHDphysicsrelatedtoAlfvenmodesarewelldescribed.Theestimationofperturbedelectronpressurefromparticledynamicsisdominant,whiletheeffectsofothermomentsarenegligible.Anotheradvantageofthealgorithmisthatthelongitudinalinducedelectricfield,Etz=-■z/■t,isexplicitlyestimatedbythegeneralizedOhm’slawandusedintheequationsofmotion.Furthermore,theparticlevelocitiesalongthemagneticfieldareused(vz-formulation)insteadofgeneralizedmomentums(pz-formulation),hencethereisnoproblemof’cancellation’,whichwouldotherwiseappearwhenAzisestimatedfromtheAmpere’slawinthepz-formulation.ThesuccessfulsimulationofthecollisionlessinternalkinkmodebythenewGpic-MHDwithrealisticvaluesofthelarge-scaleandhigh-betatokamaksrevealedtheusefulnessofthenewalgorithm.