简介：

简介：

简介：

简介：

简介：

简介：

简介：

简介：Exploringthehumanbrainisperhapsthemostchallengingandfascinatingscientificissueinthe21stcentury.Itwillfacilitatethedevelopmentofvariousaspectsofthesociety,includingeconomics,education,healthcare,nationaldefenseanddailylife.Theartificialintelligencetechniquesarebecomingusefulasanalternatemethodofclassicaltechniquesorasacomponentofanintegratedsystem.Theyareusedtosolvecomplicatedproblemsinvariousfieldsandbecomingincreasinglypopularnowadays.Especially,theinvestigationofhumanbrainwillpromotetheartificialintelligencetechniques,utilizingtheaccumulatingknowledgeofneuroscience,brain-machineinterfacetechniques,algorithmsofspikingneuralnetworksandneuromorphicsupercomputers.Consequently,weprovideacomprehensivesurveyoftheresearchandmotivationsforbrain-inspiredartificialintelligenceanditsengineeringoveritshistory.Thegoalsofthisworkaretoprovideabriefreviewoftheresearchassociatedwithbrain-inspiredartificialintelligenceanditsrelatedengineeringtechniques,andtomotivatefurtherworkbyelucidatingchallengesinthefieldwherenewresearchesarerequired.

简介：

简介：Asanadvancedprocessdetectiontechnology,electricalimpedancetomography(EIT)haswideapplicationprospectsandadvantagesinmedicalimagingdiagnosis.However,aseriesofissuesneedtobeaddressedbeforeapplyingEITforbedsidemonitoring.Medicaldiagnosisandbedsidemonitoringaredynamicmeasuringprocess,wherethepositionsofmeasuringelectrodesandtheshapeofthedetectedfieldarechangingdynamical.Duetotheinabilitytocopewiththechangeableelectrodepositionsandvariousdynamicfields,existingEITsystemsaremainlyusedforindustrialdetectioninconditionofstaticmeasurementandvisualization.Inthispaper,weinvestigatethedynamicmeasurementandvisualizationofhumanbreastinEITfield,describethedesignofthemeasuringsensorsystem,andexpoundthemeasuringprinciple.Themaincomponentofthehardwaresystemisabuiltinservoelectricalresistancetomographysensorwithcapacitiveslidingrod,whichcanadapttothecrowdofdifferentchestcontourandthechangeofchestshapeinthedynamicprocessofbreathing.Thecorrespondingmeasuringprincipleisextractingallreal-timepositionsofmeasuringelectrodes,thenobtainingthedynamicboundary,finallydividingthedetectionfieldrapidly.Experimentalresultsconfirmedthattheproposedsystemcanobtainreal-timelocationofboundarysensoranddynamicallysolvetheproblemofarbitrary-shapeboundarymeasurement.Theimagingresultsvalidatetheavailabilityofdesignedsensorsystemandtheeffectivenessofthecorrespondingmeasuringprinciple.

简介：

简介：

简介：Extremewaterlevelisanimportantconsiderationwhendesigningcoastalprotectionstructures.However,frequencyanalysisrecommendedbystandardcodesonlyconsiderstheannualmaximumwaterlevel,whereaswaterlevelsshouldactuallyberegardedasacombinationofastronomicaltideandstormsurge.Thetwoimpactingfactorsarebothrandomvariables,andthispaperdiscussestheirdependencystructuresandproposesanewjointprobabilitymethodtodetermineextremedesignwaterlevels.Thelognormal,Gumbel,Weibull,Pearsontype3,traditionalmaximumentropy,andmodifiedmaximumentropydistributionsareappliedtofitunivariatedataofastronomicaltidesandstormsurgesseparately,andthebivariatenormal,Gumbel-Hougaard,FrankandClaytoncopulasarethenutilizedtoconstructtheirjointprobabilitydistributions.Toensurethatthenewdesignmethodissuitableforusewithtyphoondata,theannualoccurrencefrequencyoftyphoonprocessesisconsideredandcorrespondingbivariatecompoundprobabilitydistributionsareproposed.BasedonmaximumwaterleveldataobtainedfromHengmenhydrologicalstationinthePearlRiverBasin,China,theseprobabilitymodelsareappliedtoobtaindesignsforextremewaterlevelsusingthelargestsumoftheastronomicaltideandstormsurgeobtainedunderfixedjointreturnperiods.Thesedesignvaluesprovideanimprovedapproachfordeterminingthenecessaryheightofcoastalandoffshorestructures.

简介：

简介：TheSongkeNo.2well(easternhole)(referredtoasWellSK-2),oneofthe"twowellsandfourholes"oftheDeepContinentalScientificDrillingEngineeringProjectintheSongliaoBasin,isinAndaCity,HeilongjiangProvince,andwasofficiallycompletedonMay26,2018.TliescientificgoalsofWellSK-2coverfouraspects:paleoclimateresearch,resourceandenergyexploration,primarygeologicalresearch,anddevelopmentofdeepearthexplorationtechniques.Sincetheofficialcommencementofdrillingin2014,theWellSK-2scientificdrillingengineeringteamhasorganizedandimplementeddrillingforcoring,insitulogging,chemicalanalysisofcoreelements,anddeepstructuralexplorationaroundthewell.Currently,thefollowingpreliminaryscientificresearchprogresshasbeenmade:4334.81minsitucoredatahasbeenobtained;thecentimeter-levelhigh-resolutioncharacterizationofthemostcompleteandcontinuousCretaceouscontinentalstrataeverunearthedhasbeencompleted,andthestandardprofileofcontinentalstratahasbeeninitiallyestablished;theunconventionalnaturalgasresourcesandbasin-typehotdryrocksinthedeepSongliaoBasinwerefoundtohavegoodprospectsforexplorationanddevelopment;theclimaticevolutionaryhistoryoftheCretaceouscontinentalstratawasrebuiltforthefirsttime,coveringhundredsofthousandstomillionsofyears,andthemajoreventsofCretaceousclimatefluctuationshavebeendiscovered;alltheserevealstrongevidenceforthesubductionandaggregationofpaleo-oceanplates,providingatheoreticalbasisforthere-recognitionofthegenesisoftheSongliaoBasinandfordeepearthoilandgasexploration.TheimplementationoftheDeepContinentalScientificDrillingEngineeringProjectintheSongliaoBasinisofgreatsignificanceforexploringthemysteriesoftheEarthandsolvingmajorproblemssuchasthoserelatedtothedeepenergyenvironment.Itisasolidstepalongtheroadof"goingdeepintotheEarth".

简介：Nerveguidanceconduits(NGCs)canprovidesuitablemicroenvironmentfornerverepairandpromotetheproliferationandmigrationofSchwanncells(SCs).Thus,wedevelopednerveguidanceconduits(NGCs)withpolypyrrole-coatedpoly-caprolactonenanoyarns(PPy-PCL-NYs)asfillersinthisstudy.PCL-NYswiththeorientedstructurewerepreparedwithadouble-needleelectrospinningsystemandthenPPywascoatedonPCL-NYsviatheinsituchemicalpolymerization.Subsequently,PCLnanofiberswerecollectedaroundnanoyarnsbytheconventionalelectrospinningprocessastheouterlayertoobtainPPy-PCL-NYnerveguidanceconduits(PPy-PCL-NYNGCs).PPy-PCL-NYswereanalyzedbySEM,FTIRandXPS.ResultsshowedthatPPywashomogeneouslyanduniformlydepositedonthesurfaceofPCL-NY.Strain-stresscurvesandtheYoung’smodulusofPPy-PCL-NYswereinvestigatedcomparedwiththoseofnon-coatedPCL-NYs.StudiesonbiocompatibilitywithSCsindicatedthatPPy-PCL-NYNGCsweremoreconducivetotheproliferationofSCsthanPCL-NYNGCs.Insummary,PPy-PCL-NYNGCsshowthepromisingpotentialfornervetissueengineeringrepairandregeneration.

简介：

简介：

简介：