Klasifikace vzorů pomocí fuzzy neuronových sítí

| Kategorie: Diplomové, bakalářské práce  | Tento dokument chci!

Práce popisuje základy principu funkčnosti neuronů a vytvoření umělých neuronových sítí. Je zde důkladně popsána struktura a funkce neuronů a ukázán nejpoužívanější algoritmus pro učení neuronů. Základy fuzzy logiky, včetně jejich výhod a nevýhod, jsou rovněž prezentovány. Detailněji je popsán algoritmus zpětného šíření chyb a adaptivní neuro-fuzzy inferenční systém. Tyto techniky poskytují efektivní způsoby učení neuronových sítí.

Vydal: FCC Public s. r. o. Autor: Tamás Ollé

Strana 42 z 67

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Poznámky redaktora
e. For the case usage neural network, the function feedforwardnet used, which creates neural network suitable for classification tasks.m This function used for audio file loading and parameter calculation (see Appendix). Analysis parameters –params. Afterwards, the network tested for correctness with the same data used for training using the function evalfis. These functions can create simple neural network structure, and are able train and evaluate it. The input signal limited with band-pass filter with range 100 kHz to filter out background noise then divided into number frames depending its length and the adjusted parameters. The given file read into vector and normalized have maximal amplitude Subsequently, the parameters are calculated using the params function. Loading audio files wavload. The first letter corresponds the first letter the used languages (i. The target matrix and the matrix parameters are returned return values of the function. The file names are prepared contain information about the language of the recording. However, parameters can be used instead the original signals that describe the signal shape appropriate level. This information used for creating the target matrix (tgt) that used for training the network. The number neurons in each layer also set here.33 The learning itself realized the function anfis that executes the learning algorithm individually for each network. 'c' means Czech, 'e' means English and the prefix 'h' for Hungarian). . Firstly, the file names are determined the given directory that has the wav extension.1. After that, all files are processed sequentially, described herein. The result each network saved the corresponding column matrix res. Further signal preparation described in Chapter 6. The number ANFIS networks equals the number output variables (columns matrix tgt). Since the average length the recorded words are around 700ms, each file set to this length cutting the signal this time point and filled with zeros case of shorter files.m The signals their raw form are not suitable inputs network because these contain extremely large amount information. In the case, the mode set 'nnv', the neural network functions created within the frame Semestral Project MM2E (netinit, netlearn and neteval) are use. The function train trains the network for the given training data. utilizes hybrid learning technique, what combination the least-squares estimator (LSE) method and the error backpropagation (EBP) algorithm