Multilayer neural network yog dab tsi?
Multilayer neural network yog dab tsi?

Video: Multilayer neural network yog dab tsi?

Video: Multilayer neural network yog dab tsi?
Video: How to create your FIRST NEURAL NETWORK with TensorFlow! 2024, Kaum ib hlis
Anonim

A ntau txheej perceptron (MLP) yog ib chav kawm ntawm feedforward dag neural network (ANN). Ib qho MLP muaj tsawg kawg yog peb txheej ntawm cov nodes: txheej txheej nkag, txheej zais thiab txheej txheej tawm. Tsuas yog rau cov nodes input, txhua qhov node yog a neuron uas siv lub nonlinear activation muaj nuj nqi.

Ib yam li ntawd, nws raug nug, yuav ua li cas ntau txheej neural network kawm?

Multilayer networks daws cov teeb meem kev faib tawm rau cov kab tsis sib xws los ntawm kev siv cov txheej txheem zais, uas nws cov neurons yog tsis ncaj qha txuas rau cov zis. Cov txheej txheem zais ntxiv ua tau tau txhais geometrically li ntxiv hyper-planes, uas txhim khu kev sib cais muaj peev xwm network.

Tsis tas li ntawd, vim li cas thiaj siv ntau txheej hauv ib lub neural network? A neural network siv cov kev ua haujlwm tsis-linear ntawm txhua qhov txheej . Ob txheej txhais tau hais tias tsis yog-linear muaj nuj nqi ntawm ib qho kev sib xyaw ua ke ntawm cov haujlwm tsis-linear ntawm cov kab sib txuas ntawm cov khoom siv. Qhov thib ob yog nplua nuj ntau dua li thawj tus. Li no qhov txawv ntawm kev ua tau zoo.

Ua raws li qhov xav tau, Multilayer Perceptron ua haujlwm li cas?

A multilayer perceptron (MLP) yog qhov sib sib zog nqus, dag neural network . Lawv yog tsim los ntawm ib txheej input kom tau txais lub teeb liab, ib tug tso zis txheej uas ua rau ib tug txiav txim los yog kwv yees txog cov tswv yim, thiab nyob rau hauv nruab nrab ntawm ob, ib tug arbitrary naj npawb ntawm zais khaubncaws sab nraud povtseg uas yog qhov tseeb computational cav ntawm lub MLP.

Dab tsi yog sigmoid muaj nuj nqi hauv neural network?

Nyob rau thaj tsam ntawm Artificial Neural Networks , cov sigmoid Funcion yog ib hom kev ua kom muaj nuj nqi rau artifical neurons. Cov Sigmoid muaj nuj nqi (qhov tshwj xeeb ntawm logistic muaj nuj nqi ) thiab nws cov qauv zoo li: Koj tuaj yeem muaj ntau hom kev ua kom muaj nuj nqi thiab lawv yog qhov zoo tshaj plaws haum rau ntau lub hom phiaj.

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