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MeCabとKerasを使ったテキスト分類
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masa-ita
February 23, 2019
Technology
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MeCabとKerasを使ったテキスト分類
masa-ita
February 23, 2019
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Transcript
MeCabKeras 2019/2/23 @Python in
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livedoor
MeCab
MeCab HN7GSMGegi−69PKPLW`8:%/0-$ &25iGQoegI _@eg1-*,.4'",BC? !.5)(
fdkRm 5'5 V;T[nUJaGoogle Inc. ^p\Ffh]cX +.3-5#><jl = Y ,"5DAbEZ O
MeCab MeCab C++ '& # !*(
Windows %$ https://taku910.github.io/mecab/#download #"+) 32 64 , https://github.com/ikegami-yukino/mecab/releases/tag/v0.996 #"+) Mac %$ Homebrew mecab, mecab-ipadic #!+) Ubuntu %$ apt mecab, mecab-ipadic #!+)
Keras
keras.preprocessing.text.Tokenizer /-.2 /- !%"(8$&5 * #31)76 0)% +4
', fit &5tokenize !%0) %
keras.preprocessing.sequence.pad_sequences ! ( " # $'%
&
BoW: Bag of Words # %EC* G DEC?
- J;/ F<+EC,8=@1/0&%) 58 ()! '"%*$* ,8I209&%) 58 /1 TF-IDF: Term Frequency Inverse Document Frequency EHI2 ><,8 EC:67B4A .1&% )3
Word Embedding a]!.$*2C<@ fTY=!UD :9RPJG5 a]J ?Z10,000 20,000K6
Ni '3&, &.$*2 7<a]![RP7dJ`RPe.$*2 F S< Word Embeddinga]gO Google A; Xb!LWord2vec^V \B W^Ec!80)2H_!LRP IM Word2vec&#(-%1/Qh@Ec!8 )"-1 +4%0)27> Ec!8<@
RNN: Recurrent Neural Network *-H,+.=8 G "!%AB !*DF
@162 ,'/5?)/ G#$&!:(8 RNN> C;79304E LSTMLong Short Term MemoryGRU Gated Recurrent Unit<
BoW DNN
Word EmbeddingGlobalAveragePooling1D
Word EmbeddingRNNLSTM DNN
BoWDNN 0.5E #9("%$)CBoW+/ DNN4: * DBG6GlobalAveragePooling1D1 !$=2F
A LSTM7H2F,- <4: ' ; 7I ?3>8)CLSTM 4: & @:4
NLP,B8?=4-1$!&)%+"C5>@.A 7EFDQ&A-1Sequence-to-Sequence($* Attention :($*.A;3 OpenAIGoogle
Transformer '#Allen Institute 2.ELMo Google G5($*3BERTOpenAI .6GPT-204 <($* 9/