简介：Anactivestereovisionsystembasedonamodelofneuralpathwaysofhumanbinocularmotorsystemisproposed.Withthismodel,itisguaranteedthatthetwocamerasoftheactivestereovisionsystemcankeeptheirlinesofsightfixedonthesametargetobjectduringsmoothpursuit.Thisfeatureisveryimportantforactivestereovisionsystems,sincenotonly3Drecon-structionneedsthetwocamerashaveanoverlappingfieldofvision,butalsoitcanfacilitatethe3Dreconstructionalgorithm.Toevaluatetheeffectivenessoftheproposedmethod,somesoftwaresimulationsaredonetodemonstratethesametargettrackingcharacteristicinavirtualenvironmentapttomistrackingeasily.Here,mistrackingmeanstwoeyestracktwodifferentobjectsseparately.Thentheproposedmethodisimplementedinouractivestereovisionsystemtoperformrealtrackingtaskinalaboratoryscenewhereseveralpersonswalkself-determining.Beforetheproposedmodelisimplementedinthesystem,mis-trackingoccurredfrequently.Afteritisenabled,mistrackingneveroccurred.Theresultshowsthatthevisionsystembasedonneuralpathwaysofhumanbinocularmotorsystemcanreliablyavoidmistracking.

简介：Awheeledmobilemechanismwithapassiveand/oractivelinkagemechanismforroughterrainenvironmentisdevelopedandevaluated.Thewheeledmobilemechanismwhichhashighmobilityinroughterrainneedssophisticatedsystemtoadaptvariousenvironments.Wefocusonthedevelopmentofaswitchingcontrollersystemforwheeledmobilerobotsinroughterrain.Thissystemconsistsoftwosub-systems:anenvironmentrecognitionsystemusinglinkanglesandanadaptivecontrolsystem.Intheen-vironmentrecognitionsystem,weintroduceaSelf-OrganizingMap(SOM)forclusteringlinkangles.Intheadaptivecontrol-lers,weintroduceneuralnetworkstocalculatetheinversemodelofthewheeledmobilerobot.Theenvironmentrecognitionsystemcanrecognizetheenvironmentinwhichtherobottravels,andtheadjustablecon-trollersaretunedbyexperimentalresultsforeachenvironment.Thedualsub-systemswitchingcontrollersystemisexperi-mentallyevaluated.Thesystemrecognizesitsenvironmentandadaptsbyswitchingtheadjustablecontrollers.Thissystemdemonstratessuperiorperformancetoawell-tunedsinglePIDcontroller.

简介：Thebiologicalimmunesystemisacomplexadaptivesystem.Therearelotsofbenefitsforbuildingthemodeloftheimmunesystem.Forbiologicalresearchers,theycantestsomehypothesesabouttheinfectionprocessorsimulatetheresponsesofsomedrugs.Forcomputerresearchers,theycanbuilddistributed,robustandfaulttolerantnetworksinspiredbythefunctionsoftheimmunesystem.Thispaperprovidesacomprehensivesurveyoftheliteraturesonmodellingtheimmunesystem.Fromthemethodologyperspective,thepapercomparesandanalyzestheexistingapproachesandmodels,andalsodemonstratesthefocusingresearcheffortonthefutureimmunemodelsinthenextfewyears.

简介：Simulatingbiologicalolfactoryneuralsystem,KⅢnetwork,whichisahigh-dimensionalchaoticneuralnetwork,isdesignedinthispaper.Differentfromconventionalartificialneuralnetwork,theKⅢnetworkworksinitschaotictrajectory.ItcansimulatenotonlytheoutputEEGwaveformobservedinelectrophysiologicalexperiments,butalsothebiologicalintelligenceforpatternclassification.Thesimulationanalysisandapplicationtotherecognitionofhandwritingnmeralsarepresentedhere.TheclassificationperformanceoftheKⅢnetworkatdifferentnoiselevelswasalsoinvestigated.

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简介：Navigationsystembasedontheanimalbehaviorhasreceivedagrowingattentioninthepastfewyears.Thenavigationsystemsusingartificialpheromonearestillfewsofar.Forthisreason,thispaperpresentsourresearchthataimtoimplementautonomousnavigationwithartificialpheromonesystem.Byintroducingartificialpheromonesystemcomposedofdatacarriersandautonomousrobots,theroboticsystemcreatesapotentialfieldtonavigatetheirgroup.Wehavedevelopedapheromonedensitymodeltorealizethefunctionofpheromoneswiththehelpofdatacarriers.Weintendtoshowtheeffectivenessoftheproposedsystembyperformingsimulationsandrealizationusingmodifiedmobilerobot.Thepheromonepotentialfieldsystemcanbeusedfornavigationofautonomousrobots.

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简介：WeintroducetherelationshipbetweenexcessnoiseinOptoelectronicCoupledDevices(OCDs)andtheirinteriordefectsandexplainhowlow-fiequencynoisecanbeusedtoestimatetheirreliability.Usingconceptsfromthebiologicalimmunesystemanditsprocessofidentifyinginvaders,wepresentasystemforestimationofthereliabilityofOCDs.Thesystemhasexpressionsfortheantigen(excessnoise),lymphocyte(criterion)andtheroleofthelymphocyteeliminatingunreliabledevices.AgeneticalgorithmwasusedtoestimatethecomponentsparametersofthenoisespectrumforestimatingthereliabilityofOCDs.Theexperimentalresultsdemonstratedthatthismethodisreliable,adaptableandpractical.

简介：贝叶斯分类方法,是以概率假设为基础的.假设需要分类的数据遵循某种假设分别,通过这些概率分布以及对观察数据本身进行推理,得出最好的分类结果.本文重点介绍贝叶斯分类模型的相关理论基础以及常见的几种贝叶斯分类模型.

简介：Asystemisdescribedherethatcannoninvasivelycontrolthenavigationoffreelybehavingratviaultrasonic,epidermalandLEDphoticstimulatorsontheback.Thesystemreceivescommandsfromaremotehostcomputertodeliverspecifiedelectricalstimulationstothehearing,painandvisualsensesoftheratrespectively.Theresultsdemonstratethatthethreestimuliworkingroupsfortheratnavigation.Wecancontroltherattoproceedandmakerightandleftturnswithgreatefficiency.Thisexperimentverifiedthattheratwasabletoreachasettingdestinationinthewayofcablewiththehelpofapersonthroughtheappropriatecoordinationofthethreestimulators.Thetelemetryvideocameramountedontheheadoftheratalsoachieveddistantimageacquisitionandhelpedtoadjustitsnavigationpathoveradistanceof300m.Inaword,thenon-invasivemotioncontrolnavigationsystemisagood,stableandreliablebio-robot.

简介：Withtheincreaseinminingdepth,mineheatharmhasappearedtobemoreprominent.Themineheatharmcouldberesolvedorreducedbyicerefrigeration.Thus,icetransportationthroughpipelinebecomesacriticalproblem;typicallyflowresistanceoccursintheelbow.Inthepresentstudy,accordingtotheanalysisofthesurfacemorphologyoffishscale,abiomimeticfunctionalsurfacestructurefortheinteriorwallofelbowisdesigned.Basedonthetheoryofliquid-solidtwophaseflow,aCFDnumericalsimulationofice-watermixtureflowingthroughtheelbowiscarriedoutusingfiniteelementmethod.Conventionalexperimentsofpressuredropandflowresistanceforbothbionicandcommonelbowsareconductedtotesttheeffectofthebionicelbowonflowresistancereduction.Itisfoundthatwiththeincreaseintheicemassfractionintheice-watermixture,theeffectofbionicelbowonresistancereductionbecomesmoreobvious.

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简介：Thispaperproposesanewadaptivelineardomainsystemidentificationmethodforsmallunmannedaerialrotorcraft.Byusingtheflashmemoryintegratedintothemicroguidenavigationcontrolmodule,systemrecordsthedatasequencesofflighttestsasinputs(controlsignalsforservos)andoutputs(aircraft’sattitudeandvelocityinformation).Afterdatapreprocessing,thesystemconstructsthehorizontalandverticaldynamicmodelforthesmallunmannedaerialrotorcraftusingadaptivegeneticalgorithm.Theidentifiedmodelisverifiedbyaseriesofsimulationsandtests.Comparisonbetweenflightdataandtheone-steppredictiondataobtainedfromtheidentificationmodelshowsthatthedynamicmodelhasagoodestimationforrealunmannedaerialrotorcraftsystem.Basedontheproposeddynamicmodel,thesmallunmannedaerialrotorcraftcanperformhovering,turning,andstraightflighttasksinrealflighttests.

简介：当前,一项称为“生命的条形码”计划正在欧美等国展开,其目的是实现对地球上现存的约1000万物种进行快速和准确的鉴定。DNA条形码是一种利用短的DNA序列对物种进行鉴定的技术。对DNA条形码的概念和原理进行了介绍,举例说明了其在物种分类、遗传多样性及物种鉴定研究中广泛的利用价值,阐述了当前该领域的研究现状,对未来的发展方向进行了展望。

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简介：C3d是补体C3不可再被酶解的最小片段,在抗原特异性免疫建立之前,C3d可识别非己抗原并与之共价结合,增强了抗原递呈细胞的递呈能力、降低了B细胞的活化阈、提高特异性抗体的滴度、促进抗体亲和力成熟等.近年来研究显示,C3d还可以促进抗原特异性细胞免疫应答水平并改变机体免疫应答模式.所以,C3d是连接固有性免疫和获得性免疫的桥梁.本文对C3d的分子生物学特征、生物学功能以及作为分子佐剂可能的分子机制进行了简要总结.

简介：Thispaperproposesanautopilotsystemthatcanbeusedtocontrolthesmallscalerotorcraftduringtheflighttestforlinear-frequency-domainsystemidentification.Theinputfrequency-sweepisgeneratedautomaticallyaspartoftheautopilotcontrolcommand.Thereforethebandwidthcoverageandconsistencyofthefrequency-sweepareguaranteedtoproducehighqualitydataforsystemidentification.Besidethat,wecansetthesafetyparametersduringtheflighttest(maximumroll/pitchvalue,minimumaltitude,etc.)sothesafetyofthewholeflighttestisguaranteed.Thisautopilotsystemisvalidatedusinghardwareintheloopsimulatorforhoverflightcondition.

简介：思维导图是一种优秀的可视化学习手段,符合学生记忆的特点和规律,对提高高中生物教学质量有着显著的作用.本文首先阐述了思维导图的概念、特征和制作,然后从学生和教师两个角度,对思维导图在高中生物课的应用展开了探讨,目的是为了通过思维导图教学来有效激发学生的学习热情,开发学生的智力,改善高中生物教学的效果.

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