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299 个结果
  • 简介:在这个工作,有为BP神经网络的动量的一个坡度方法被考虑。动量系数以一种适应方式被选择加速并且稳定网络重量的学习过程。相应集中结果被证明。

  • 标签: 神经网络 梯度方法 动量 收敛方法
  • 简介:Anewsystemisdevelopedtorecognizepromotersequencesfromnon-promotersequencesbasedonpositionweightmatrixandbackpropagationneuralnetworkinthispaper.Thesystemperformssignificantlybetteronthetrainingsetandthetestset,themeanrecognitionrateisashighas99%onthetrainingsetand97%onthetestingset.Experimentalresultsdemonstratetheeffectivenessofthesystemtorecognizethepromotersequencesthathavebeentrainedandthepromotersequencesthathavenotbeenseenpreviously.

  • 标签: 真核状态启动子 神经传导 中枢神经功能 BP神经网络 方位重量基体
  • 简介:100piecesof26650-typeLithiumironphosphate(LiFePO4)batteriescycledwithafixedchargeanddischargeratearetested,andtheinfluenceofthebatteryinternalresistanceandtheinstantaneousvoltagedropatthestartofdischargeonthestateofhealth(SOH)isdiscussed.Abackpropagation(BP)neuralnetworkmodelusingadditionalmomentumisbuiltuptoestimatethestateofhealthofLi-ionbatteries.Theadditional10piecesareusedtoverifythefeasibilityoftheproposedmethod.Theresultsshowthattheneuralnetworkpredictionmodelhaveahigheraccuracyandcanbeembeddedintobatterymanagementsystem(BMS)toestimateSOHofLiFePO4Li-ionbatteries.

  • 标签: BP神经网络 状态估计 电池内阻 神经网络预测模型 LIFEPO4 锂离子电池
  • 简介:MostofthestudiesonArtificialNeuralNetwork(ANN)modelsremainrestrictedtosmallerriversandcatchments.Inthispaper,anattempthasbeenmadetocorrelatevariabilityofsedimentloadswithrainfallandrunoffthroughtheapplicationoftheBackPropagationNeuralNetwork(BPNN)algorithmforalargetropicalriver.ThealgorithmandsimulationaredonethroughMATLABenvironment.Themethodologycomprisedofacollectionofdataonrainfall,waterdischarge,andsedimentdischargefortheNarmadaRiveratvariouslocations(alongwithtimevariables)andapplicationtodevelopathreelayerBPNNmodelforthepredictionofsedimentdischarges.Fortrainingandvalidationpurposesasetof549datapointsforthemonsoon(16June-15November)periodofthreeconsecutiveyears(1996–1998)wasused.Fortestingpurposes,theBPNNmodelwasfurthertrainedusingasetof732datapointsofmonsoonseasonoffouryears(2006–07to2009–10)atninestations.Themodelwastestedbypredictingdailysedimentloadforthemonsoonseasonoftheyear2010–11.ToevaluatetheperformanceoftheBPNNmodel,errorswerecalculatedbycomparingtheactualandpredictedloads.Thevalidationandtestingresultsobtainedatalltheselocationsaretabulatedanddiscussed.Resultsobtainedfromthemodelapplicationarerobustandencouragingnotonlyforthesub-basinsbutalsofortheentirebasin.Theseresultssuggestthattheproposedmodeliscapableofpredictingthedailysedimentloadevenatdownstreamlocations,whichshownonlinearityinthetransportationprocess.Overall,theproposedmodelwithfurthertrainingmightbeusefulinthepredictionofsedimentdischargesforlargeriverbasins.

  • 标签: Artificial NEURAL network BACK propagation Sediment
  • 简介:(About ,can’t ,can’t 

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  • 简介:Aprojectthatputscamerasinthehandsofwar’syoungestvictimsoffersthemawaytotell—andshow——theirstories.Twomillionchildrendead.Sixmillionmaimedormutilated.Tenmillionpsychologicallydamaged.Suchisthetragictally,inthelastdecade,oftheworld’swars.borderskirmishesandethnicconflicts.Anditdoesn’tstopthere.Accordingtoa1999reportbytheU.N.’sSpecialRepresentativeforChildrenandArmedConflict,morethan20

  • 标签: children CONFLICT BORDER TALLY HANDS giving
  • 简介:Chinesestudentsarestillheadingoverseasforeducation-butthesedays,they'realsocomingback.THEseaturtlemaybeoneoftheanimalkingdoms'mostendangeredspecies,hutinitsallegoricalsense,itthrives.Eachyear,thousandsofChinesesetoutfordistantlandsonahuntforknowledge,andwell-worntrailsleadtoeverytopuniversityonearth.Somenevermakeit-they'resnaffledupbymassivecompetition,financialrestraintsorbureaucracybeforetheyeverleavetheirshores.Butthosethatdogetthroughhavedifferentinstinctsthantheirpredecessors-they

  • 标签: 中国 归国留学生 生活状况 创业精神
  • 简介:can’t ,can’t ,don’t 

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