简介:Thispaperdescribestheinverstigationdevotedtoestablishsuitableweightsinafeed-forwardneuralnetworkrealizingthenarrow-bandfilteringmapinthecaseofadaptivelineenhancement(ALE)bytheutilityoftheoptimumcommonlearningratebackpropagation(OCLRBP)algorithm.Itisfoundthatafeed-forwardnetworkwith64linearinputandoutputneurons,and8oddsigmoidneuronsinthehiddenlayer,i.e.an(64→8→64)architecture,couldestablishthespecificinput-outputfunctioninthecaseofrelativelylowsignal-to-noiseradio.Onlyisaninputsignalconsistingofmixedperiodicandbroad-bandcomponentsavailabletothenetworksystem.Afterlearning,boththe"fanning-in-connectionpatterns",eachofwhichconsistsofweightsfanningintoahidden-neuronFromalltheoutputsofinput-neurons,andthe"fanning-out-connectionpatterns",eachofwhichconsistsofweightsfanningoutfromahidden-neurontoalltheinputsofoutput-neurons,aretunedtotheperiodicsignals.Thenonline
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简介:Thenetworkmethodformodelingthermoacousticenginesisdescribed.Somesimulationresultsonacousticfieldsandphasesinengine,especiallyinthethermoacousticstackarepresentedandanalyzed.Theeffectsofsomekeyfactorsonperformanceofstackandenginesystemaresimulatedanddiscussed.Theseeffectfactorsincludethespacesofplatesofstack,thepositionofstackinenginesystem,thesourceparameterofstack,andthemeanworkingpressureoftheenginesystem.