简介：Recursiveformulationshavesignificantlyhelpedinachievingreal-timecomputationsandmodel-basedcontrollaws.Therecursivedynamicssimulator(ReDySim)isaMATLAB-basedrecursivesolverfordynamicanalysisofmultibodysystems.ReDySimdelvesuponthedecouplednaturalorthogonalcomplementapproachoriginallydevelopedforserial-chainmanipulators.Incomparisontothecommerciallyavailablesoftware,dynamicanalysesinReDySimcanbeperformedwithoutcreatingsolidmodel.TheinputparametersarespecifiedinMATLABenvironment.ReDySimhascapabilitytoincorporateanycontrolalgorithmwithutmostease.Inthiswork,thecapabilitiesofReDySimforsolvingopen-loopandclosed-loopsystemsareshownbyexamplesofroboticgripper,KUKAKR5industrialmanipulatorandfour-barmechanism.ReDySimcanbedownloadedforfreefromhttp://www.redysim.co.nrandcanbeusedalmostinstantly.

简介：Inthispapertheprocessofknowledgeaccumulationforaparticulartechnologyisstudied.Twocountries,saythetechnologyfollowerandthetechnologyfrontier,areconsidered.Thefrontier’sknowledgegrowthisdeterminedbyitsR&Deffortsonthetechnology.ThelevelofknowledgestockforthefollowercountryisaugmentedbyitsR&Dactivitiesforthetechnologyandabsorbingsomeoftheexternalknowledgethroughspilloverfromthefrontier.Theextenttowhichthefollowerisabletoexploittheexternalknowledgedependsontechnologicalgap,absorptivecapacity,absorptiontimeanddegreeofspillover.Newconceptssuchasnaturalandenhanceddegreeofspillover,backgroundandinnovativeknowledgeandabsorptionspeedareintroducedinthepresentworktodeeplyexploretheprocessofknowledgespillover.ThefactorsinfluencingtheknowledgedevelopmentinthelongtermaresimultaneouslystudiedinanintegratedstructureprovidedbytheSystemDynamicsapproach.Thisframeworkshowstheresponsestothechangesandprovidesthebasisforexaminingtheinteractionsamongthevariablesovertime.

简介：Nonlinearmetailogenicdynamicsisoneofthodifficultprob1emsthatcommonlyfacemoderncom-plcxscicnces.TheRussianfamousmetallogenjstA.D.Shcbeglov(1988)paidattentiontotheprob1emofnonlin-earmctal1ogenyandproposedthcconceptofnonlinearmcta11ogeny.HepointedoutthatthercjSane-cessityofamoredetailedandcomprchensive

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：Intherepresentationofnaturalandsocialphenomena,thereexistnotonlyordinaryorpartialdiferentialequationswhichareindependentofthepaststatesanddeterminedsolelybythepresentstates,butalsotimedelaydiferentialequationswhicharerelatedtosomeof更多还原

简介：Anewflowtheoryisestablishedthroughtheobjectivityrequirementonthefluiddynamics.Itwasknownthatinhomogeneousfluidmotiongaverisetoviscousforcewhiletheselectionofobserversondifferentspace-timepointswouldchangesuchaninhomogeneouscharacter.Therefore,whentheviscousforcewasconsideredasanobjectiveexistenceforeigntotheselectionofobservers,theforminvariancesofviscousforceandmomentumequationunderlocalrotationtransformationrequiredanewdynamicfield,namelythevortexfieldtobeintroduced.ThenthedynamicalequationsofallflowfieldswereobtainedthroughconstructingtheLagrangiandensityoffluidsystemandusingthevariationalapproachofenergy.

简介：日本家电制造企业将公示家电税前价格；2014年全球液晶电视出货量将增至2．13亿台；11月美国家电出货量同比增长18％

简介：Thispaperstudiestheiterationsofholomorphicself-mapswhichhavenonwanderingpointsovergeneralpseudoconvexdomainsisC^2.TheauthorsgiveespeciallyaDenjoy-Wolff-typetheoremonpseudoconvexdomainswithreal-analyticboundaries,orevenmoregeneral,ondorpainsoffinitetype.

简介：TherelationshipbetweendissolutionrateandpHisdeterminedbycarryingoutdynamicexperimentsofhedenbergiteandgrossularitedissolution.Thedissolutionreactionequationsareestablished.Thedissolutionpro-cessesoftwomineralsaresimulatedbyusingthetheoryofmulti-phaseandmulti-componentchemicalequilibrium.Theresultsbringlighttothemechanismofdissolutionprocesses.Duetoincongruentdissolutionoftwomineralswhenthedissolutionprocessesreachametastablesupersaturationcriticalpointnewmetastablemineralscanbeformedinthesystem.TheexperimentsshowedthatdissolutionofgrossulariteandhedenbergiteconsumesH~+andthenmakespHvalueofsolutionhigh.Inturn,precipitationofmetastablemineralsmakespHvaluelow.Precipitationofmetastablemineralshasacatalyticeffectfordisso-lutionofreactingmineralsinspecialtime.PrecipitationanddissolutioncarriedoutalternatelyinthesystemanditcausesperiodicoscillationofpHvalueswithreactingtime.Thisisthe

简介：ＯｎＳｏｄｉｕｍＣｌｕｓｔｅｒＣｏｌｌｉｓｉｏｎＤｙｎａｍｉｃｓＯｎＳｏｄｉｕｍＣｌｕｓｔｅｒＣｏｌｌｉｓｉｏｎＤｙｎａｍｉｃｓ￥ＺｈａｎｇＦｅｎｇｓｈｏｕ；Ｅ．ＳｕｒａｕｄａｎｄＲ．ＧｌｏｗｉｎｓｋｉＡｄｉｓｔａｌｌｃｅ－－ｄｅｐｅｎｄｅｎｔｔｉｇ...

简介：Animportantfunctioningmechanismofbiologicalmacromoleculesisthetransitionbetweendifferentconformedstatesduetothermalfluctuation.Inthepresentpaper,abiologicalmacromoleculeismodeledastwostrandswithsidechainsfacingeachother,anditsstochasticdynamicsincludingthestatisticsofstationarymotionandthestatisticsofconformationaltransitionisstudiedbyusingthestochasticaveragingmethodforquasiHamiltoniansystems.ThetheoreticalresultsareconfirmedwiththeresultsfromMonteCarlosimulation.

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简介：Westudyanonlinearlosslesspolarizer(NLP),afiber-baseddeviceabletocontrolthepolarizationofanopticalsignalwhilepreservingitsenergy.TheNLPexploitsthelosslesspolarizationattraction(LPA)generatedbytheKerrinteractionsbetweenthesignalandafullypolarizedcontinuouswave(CW)pump.Byemployingacopropagatingpump,weshowthattheeffectivenessofLPAdependsonthejointactionoftheKerrnonlinearityandthemutualdelaybetweensignalandpump.WefindtheoptimalpumpwavelengthplacementanddemonstratethattrueLPAoccursonlywithinalimitedrangeofdelayvalues.Thus,weexplainwhythecopropagatingNLPismoreflexibleandpowerefficientcomparedwiththetraditionalcounterpropagatingNLP.

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简介：Faultisacomplexdynamicsystemcontrolledbythecouplingofrocktexture,reaction,fluidflow,stress,androckdeformationmechanism.Acoupledreaction-transport-mechanicaldynamicmodelforfaultsystemisestablishedanddescribedinthispaper.AnexampleispresentedfortheShuikoushandeposit,Hunan.Theresultsofdynamicsimulationindicatethattheevolutionandmagnitudeoffracturepermeabilityofdifferentrocksaredifferent,andthatfaultingcanenhancethespatialheterogeneityofrockpermeabilityandfacilitatefluidflowandmineralizationinlocalfaultzone.Thepressureforafaultusuallyshowsavariationmodeofaperiodicoscillationwithtime,whichreflectsthechaoticbehavioroftheevolutionofafault.

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简介：Forthedynamicsofarigidbodywithafixedpointbasedonthequaternionandthecorrespondinggeneralizedmomenta,adisplacement-basedsymplecticintegrationschemefordifferential-algebraicequationsisproposedandappliedtotheLagrange’sequa-tionsbasedondependentgeneralizedmomenta.Numericalexperimentsshowthatthealgorithmpossessessuchcharactersashighprecisionandpreservingsysteminvariants.Moreimportantly,thegeneralizedmomentabasedLagrange’sequationsshowuniquead-vantagesoverthetraditionalLagrange’sequationsinsymplecticintegrations.

简介：所有液体动态方程在他们的当模特儿的规模下面是有效的，意味着免费路径例如粒子并且意味着Boltzmann方程的碰撞时间规模和NavierStokes(NS)方程的水动力学规模。当前的计算液体动力学(CFD)集中于部分微分方程(PDE)的数字答案，并且它的目的是得到这些管理方程的精确答案。在如此的一个CFD惯例下面，它是难的开发盖住流动物理从的一个统一计划对水动力学运动因为没有能用Boltzmann做光滑的转变到当模特儿的NS的如此的管理方程，连续地可伸缩。液体动力学的学习需要超出传统的数字部分微分方程。出现设计应用程序，例如为近空间的飞行和流动和热转移在的空气车辆设计微设备，确实要求煤气的动力学的概念的进一步的扩大到物理现实，而非传统的可区分的管理方程的更大的域。在当前的阶段，非平衡流动物理很好还没由于适当工具的缺乏被探索了或清楚地理解。不幸地在当前的数字PDE途径下面，它是难的由于有效PDE的缺席开发如此的一个有意义的工具。以便多尺度的构造和类似于构造管理方程的Boltzmann或NS的当模特儿的过程的multiphysics模拟方法，一个数字算法的发展应该基于物理建模的第一个原则。在这份报纸，而不是跟随传统的数字PDE路径，我们介绍为CFD算法开发的作为一个原则的直接建模。因为所有计算与有限房间分辨率在一个discretized空格被进行，要当模特儿的流动物理不得不在网孔尺寸和时间步骤规模被做。这里，CFD是差不多分离数字进化方程的直接构造，在网孔尺寸和时间步骤将玩的地方，在建模的动态角色处理。与在网孔之间的比率的变化，尺寸和本地粒子意味着免费路径，从到水动力学波浪繁殖的运动粒子运输和碰撞的计划愿望俘获流动物理。基于直接建模，流动运动的连续动力学�

简介：Reaction-diffusion(RD)equationwasoftenusedtoinvestigatethepatterndynamics,buttelegraphreaction-diffusion(TRD)systemwasseldomstudied.Inthispaper,theIzhikevichmodelwasmodifiedtoexplainsomebiologicalmechanismsbyRDandTRDinneuronalcluster.Thenanewconditionunderwhichthesystemlosesstabilitywasproposedandtheeffectofparameters,diffusion,memoryandsteadystatewereconsideredontheprocessofneuronalspiking.Themethodpresentedisanovelapproachtoinvestigatethepatterndynamicsofbiologicalsystems.Finally,simulationsarecarriedouttovalidateourtheoreticalresults.

简介：Northernpeatlandsstorealargeamountofcarbonandplayasignificantroleintheglobalcarboncycle.Owingtothepresenceofwaterloggedandanaerobicconditions,peatlandsaretypicallyasourceofmethane(CH4),averypotentgreenhousegas.ThispaperreviewsthekeymechanismsofpeatlandCH4production,consumptionandtransportandthemajorenvironmentalandbioticcontrolsonpeatlandCH4emissions.TheadvantagesanddisadvantagesofmicrometeorologicalandchambermethodsinmeasuringCH4fluxesfromnorthernpeatlandsarealsodiscussed.ThemagnitudeofCH4fluxvariesconsiderablyamongpeatlandtypes(bogsandfens)andmicrotopographiclocations(hummocksandhollows).Someanthropogenicactivitiesincludingforestry,peatharvestingandindustrialemissionofsulphurdioxidecancauseareductioninCH4releasefromnorthernpeatlands.FurtherresearchshouldbeconductedtoinvestigatetheinfluenceofplantgrowthformsonCH4fluxfromnorthernpeatlands,determinethewatertablethresholdatwhichplantproductioninpeatlandsenhancesCH4release,andquantifypeatlandCH4exchangeatplantcommunitylevelwithahighertemporalresolutionusingautomaticchambers.