简介:Basedonhighorderdynamicneuralnetwork,thispaperpresentsthetrackingproblemforuncertainnonlinearcompositesystem,whichcontainsexternaldisturbance,whosenonlinearitiesareassumedtobeunknown.Asmoothcontrollerisdesignedtoguaranteeauniformultimateboundednesspropertyforthetrackingerrorandallothersignalsintheclosedloop.Certainmeasuresareutilizedtotestitsperformance.Noaprioriknowledgeofanupperboundonthe'optimal'weightandmodelingerrorisrequired;theweightsofneuralnetworksareupdatedon-line.Numericalsimulationsperformedonasimpleexampleillustrateandclarifytheapproach.
简介:Inthispaper,amulti-objectiveparticleswarmoptimization(MOPSO)algorithmandanondominatedsortinggeneticalgorithmⅡ(NSGA-Ⅱ)areusedtooptimizetheoperatingparametersofa1.6L,sparkignition(SI)gasolineengine.Theaimofthisoptimizationistoreduceengineemissionsintermsofcarbonmonoxide(CO),hydrocarbons(HC),andnitrogenoxides(NOx),whicharethecausesofdiverseenvironmentalproblemssuchasairpollutionandglobalwarming.Stationaryenginetestswereperformedfordatageneration,covering60operatingconditions.Artificialneuralnetworks(ANNs)wereusedtopredictexhaustemissions,whoseinputswerefromsixengineoperatingparameters,andtheoutputswerethreeresultingexhaustemissions.TheoutputsofANNswereusedtoevaluateobjectivefunctionswithintheoptimizationalgorithms:NSGA-ⅡandMOPSO.Thenadecision-makingprocesswasconducted,usingafuzzymethodtoselectaParetosolutionwithwhichthebestemissionreductionscanbeachieved.TheNSGA-Ⅱalgorithmachievedreductionsofatleast9.84%,82.44%,and13.78%forCO,HC,andNOx,respectively.WithaMOPSOalgorithmthereachedreductionswereatleast13.68%,83.80%,and7.67%forCO,HC,andNOx,respectively.
简介:
简介:BACKGROUND:Duetothelackofautografttransplantrejection,Schwanncells(SCs)canpromotetheproliferationofembryonicstemcellsandtheinductionofdopaminergicneurons.Mesencephalicstemcellscanbeinducedtoproducedopaminergicneurons.Thetherapeuticeffectsofco-graftsofSCsandneuralstemcells(NSCs)deservesfurtherstudyandverificationinParkinsoniananimalmodels.OBJECTIVE:ToinvestigatetheeffectsofSchwanncellsandmesencephalicNSCco-graftsinParkinsoniananimalmodelsonanimalbehaviorandhistology.DESIGN:Randomizedcontrolledexperiment.SETTING:FudanUniversity;InstituteofNeuroscience,ChineseAcademyofSciences.MATERIALS:ThefollowinganimalswereobtainedfromtheExperimentalAnimalCenter,ShanghaiInstituteforBiologicalScience,ChineseAcademyofSciences:5Sprague-Dawleyrats,embryonicday(E)13-16;16neonatalSprague-Dawleyrats,postnatalday1-3;and18adultSDratsofbothgenders.Animalexperimentationmetanimalethicalapproval.METHODS:TheexperimentwasperformedattheDepartmentofAnatomy,HistologyandEmbryology,ShanghaiMedicalCenter,FudanUniversityfromSeptember2005toJanuary2007.ThemesencephalicNSCswereobtainedfromthebrainsofSDratsatE13-16,andSCswereharvestedfromthesciaticnervesofneonatalratsatday1-3.Hemiparkinsonianrats(n=18)wereselectedfortransplantationafterestimatingrotationalbehaviorinresponsetoapomorphineandwererandomlyassignedtothreegroups:controlgroup,NSCgroup,andco-graftgroup.Therewere6ratsineachgroup.Eitherphosphatebufferedsaline(PBS),NSCs,orSCsplusNSCsweretransplantedintotherightneostriatumofParkinsonianrats,respectively.MAINOUTCOMEMEASURES:①Rotationalbehaviorwasinducedbyapomorphine(0.05mg/kg,i.p.)2,4,6,8,and10weeksaftertransplantation,andthenumberofrotationswerecounted.②Differentiationandsurvivalofdopaminergicneuronsintherightneostriatumwerequantifiedbytyrosinehydroxylaseimmu
简介:客观:为了探索可行性构造遗传工程人,神经干细胞(hNSCs)由lentivirus调停了多表示基因以便为针的绳索损害(SCI)的进一步的研究提供接枝来源。方法:从人的流产胎的大脑外皮的人的神经干细胞被孤立并且有教养,然后,基因被lentivirus修改两个都表示绿荧光蛋白质(GFP)和老鼠neurotrophin-3(NT-3);转基因的表示被荧光显微镜,胎儿的老鼠的背面的根中心和槽污点的方法检测。结果:遗传工程hNSCs成功地被构造。所有在荧光显微镜下面表示了明亮绿的荧光的遗传工程hNSCs被观察。转基因的hNSCs的调节媒介能导致从背面的根中心(DRG)挥舞长出的神经突。遗传工程hNSCs表示了高级NT-3which能被使用槽污点检测。结论:遗传工程hNSCs调停了bylentivirus能被构造多成功地表示基因。
简介:Allkindsofreasonsareanalysedintheoryandafaultrepositorycombinedwithlocalexpertexperiencesisestablishedaccordingtothestructureandtheoperationcharacteristicofsteamgeneratorinthispaper.Atthesametime,Kohonenalgo-rithmisusedforfaultdiagnosessystembasedonfuzzyneuralnetworks.Fuzzyarithmeticisinductedintoneuralnetworkstosolveuncertaindiagnosisinducedbyuncertainknowledge.Accordingtoitsself-associationinthecourseofdefaultdiagnosis.thesystemisprovidedwithnon-supervise,self-organizing,self-learning,andhasstrongclusterabilityandfastclustervelocity.
简介:Heterogeneouscellularnetworksimprovethespectrumefficiencyandcoverageofwirelesscommunicationnetworksbydeployinglowpowerbasestation(BS)overlappingtheconventionalmacrocell.ButduetothedisparitybetweenthetransmitpowersofthemacroBSandthelowpowerBS,cellassociationstrategydevelopedfortheconventionalhomogeneousnetworksmayleadtoahighlyunbalancedtrafficloadingwithmostofthetrafficconcentratedonthemacroBS.Inthispaper,weproposeaload-balancecellassociationschemeforheterogeneouscellularnetworkaimingtomaximizethenetworkcapacity.Byrelaxingtheassociationconstraints,wecangettheupperboundofoptimalsolutionandconverttheprimalproblemintoaconvexoptimizationproblem.FurthermoreweproposeaLagrangemultipliersbaseddistributedalgorithmbyusingLagrangedualtheorytosolvetheconvexoptimization,whichconvergestoanoptimalsolutionwithatheoreticalperformanceguarantee.Withtheproposedalgorithm,mobileterminals(MTs)needtojointlyconsidertheirtraffictype,receivedsignal-to-interference-noise-ratios(SINRs)fromBSs,andtheloadofBSswhentheychooseserverBS.SimulationresultsshowthattheloadbalancebetweenmacroandpicoBSisachievedandnetworkcapacityisimprovedsignificantlybyourproposedcellassociationalgorithm.
简介:Inthispaper,anovelframework,namedasglobal-localfeatureattentionnetworkwithrerankingstrategy(GLAN-RS),ispresentedforimagecaptioningtask.Ratherthanonlyadoptingunitaryvisualinformationintheclassicalmodels,GLAN-RSexplorestheattentionmechanismtocapturelocalconvolutionalsalientimagemaps.Furthermore,weadoptrerankingstrategytoadjustthepriorityofthecandidatecaptionsandselectthebestone.TheproposedmodelisverifiedusingtheMicrosoftCommonObjectsinContext(MSCOCO)benchmarkdatasetacrosssevenstandardevaluationmetrics.ExperimentalresultsshowthatGLAN-RSsignificantlyoutperformsthestate-of-the-artapproaches,suchasmultimodalrecurrentneuralnetwork(MRNN)andGoogleNIC,whichgetsanimprovementof20%intermsofBLEU4scoreand13pointsintermsofCIDERscore.
简介:Non-centernetworkcomputingenvironmentshavesomeuniquecharacteristics,suchasinstability,heterogeneity,autonomy,distributionandopenness,whichbringseriousissuesofsecurityandreliability.Thisarticleproposesabrand-newcredibilityprotectionmechanismforresourcesharingandcollaborationinnon-centernetworkcomputingenvironments.First,thethree-dimensionalhierarchicalclassifiedtopology(3DHCT)isproposed,whichprovidesabasicframeworkforrealizationsoftheidentitycredibility,thebehaviorcredibilityandthecapabilitycredibility.Next,theagenttechnologyisutilizedtoconstructthecredibilityprotectionmodel.Thisarticlealsoproposesanewcomprehensivecredibilityevaluationalgorithmwithsimple,efficient,quantitativeandabletomeettherequirementsofevaluatingbehaviorcredibilityandthecapabilitycredibilityevaluationaswell.TheDempster-Shafertheoryofevidenceandthecombinationruleareusedtoachievetheevaluationofthecapabilitycredibility.Thebehaviorcredibilityisevaluatedwiththecurrentandhistoricalperformanceofnodesforprovidersandconsumerstorealizemoreaccurateprediction.Basedonthenon-centernetworkcomputingsimulationtestplatform,simulationisbeenconductedtotesttheperformanceandvalidityoftheproposedalgorithms.Experimentandanalysisshowthattheproposedalgorithmsaresuitableforlarge-scale,dynamicnetworkcomputingenvironments,andabletomaintainthecredibilityfornetworkswithoutrelyingoncentralnode,makeanon-centernetworkgraduallyevolveintoanorderly,stableandreliablecomputingenvironmentefficiently.
简介:Basedonanalysesofthespatio-temporalevolutionarycharacteristicsofteleseismicresponserecordedbyFu-jiansubsurfacefluidnetworkandincombinationwithearthquakeshappenedinFujianprovinceduringthesameperiod,thispaperpointsoutthatthestep-likerisingofwaterlevelafterdistantearthquakesmayincludesomeregionalstressfieldinformation,andtheareawherewaterlevelstep-likerisescouldbethepositionthatthestressconcentratedonandwherethefutureearthquakeswouldoccur.Ifcombinedwithotherimpendingprecursors,thelocationoftheeventsmaybepredictedtoacertaindegree.
简介:Duetotheenergyandresourceconstraintsofawirelesssensornodeinawirelesssensornetwork(WSN),designofenergy-efficientmultipathroutingprotocolsisacrucialconcernforWSNapplications.Toprovidehigh-qualitymonitoringinformation,manyWSNapplicationsrequirehigh-ratedatatransmission.Multipathroutingprotocolsareoftenusedtoincreasethenetworktransmissionrateandthroughput.Althoughlarge-scaleWSNcanbesupportedbyhighbandwidthbackbonenetwork,theWSNremainsthebot...
简介:在一个二维的方形的数组的螺线波浪的开发由于部分离子隧道块(钾,钠)被调查,节点的动力学被HodgkinHuxley神经原描述,这些神经原最近被结合邻居连接。参数比率xNa(并且xK),它定义钠(钾)的工作离子隧道数字的比率到钠的全部的离子隧道数字(并且钾),被用来测量隧道块导致的移动传导力。在二参数的阶段空间(参数比率对毒害的区域)的统计可变R的分发广泛地被计算为部分离子隧道块导致的螺线波浪的转变标记参数区域,有同步R的更小的因素的区域被联系那个螺线波浪使明白毒害的隧道、柔韧的参数区域。当毒害的区域(钾或钠)和沉醉的度是小的时,螺线波浪保持活着,不同转变(死亡,几个螺线波浪共存或多手臂螺线波浪出现)发生在中等比率xNa下面(并且xK)当堵住的区域的尺寸超过某些阀值时。螺线波浪的决裂发生,螺线的多手臂飘动当隧道噪音被考虑时,被观察。
简介:Anovelcomplex,(H3O)2[Ni(2,6-pydc)2]·2H2Owassynthesizedinanaqueoussolutionandcharacterizedbymeansofsingle-crystalX-raydiffraction,elementalanalysesandIRspectra.TheX-raystructuralanalysisrevealedthatthenovelcompoundformsthree-dimensional(3D)networksbybothπ-πstackingandhydrogen-bondinginteractions.Thecrystaldataforthecomplexarea=13.853(3)nm,b=9.6892(19)nm,c=13.732(3)nm,α=90.00°,β=115.52(3)°,Y=90.00°,Z=3,R,=0.0786,wR2=0.1522.