def __init__(self,
cnn_rand=True,
STATIC=False,
ExternalEmbeddingModel=None,
n_symbols=None,
wordmap=None):
# Model hyperparameters
self.embedding_dim = 300 ##
self.filter_sizes = (3, 8)
self.num_filters = 10
self.hidden_dims = 100
self.dropout_prob = (0.5, 0.8)
self.loss = 'categorical_crossentropy'
self.optimizer = 'rmsprop'
self.l1_reg = 0
self.l2_reg = 3 ##according to kim14
self.std = 0.05 ## standard deviation
# Training Parameters
self.set_training_paramters(batch_size=64, num_epochs=10)
self.set_processing_parameters(
sequence_length=100,
vocab_size=vocabsize) ## changed to fit short text
# Defining Model Layers
if cnn_rand:
##Embedding Layer Randomly initialized
embedding_layer = Embedding(output_dim=self.embedding_dim,
input_dim=self.vocab_size)
Classes = dh.read_labels()
n_classes = len(Classes)
else:
## Use pretrained model
#n_symbols, wordmap = dh.get_word_map_num_symbols()
self.set_etxrernal_embedding(ExternalEmbeddingModel)
vecDic = dh.GetVecDicFromGensim(self.ExternalEmbeddingModel)
Classes = dh.read_labels()
n_classes = len(Classes)
## Define Embedding Layer
embedding_weights = dh.GetEmbeddingWeights(embedding_dim=300,
n_symbols=n_symbols,
wordmap=wordmap,
vecDic=vecDic)
embedding_layer = Embedding(output_dim=self.embedding_dim,
input_dim=n_symbols,
trainable=STATIC)
embedding_layer.build(
(None, )) # if you don't do this, the next step won't work
embedding_layer.set_weights([embedding_weights])
Sequence_in = Input(shape=(self.sequence_length, ), dtype='int32')
embedding_seq = embedding_layer(Sequence_in)
x = Dropout(self.dropout_prob[0])(embedding_seq)
## define Core Convultional Layers
conv_blocks = []
for sz in self.filter_sizes:
conv = Convolution1D(filters=self.num_filters,
kernel_size=sz,
padding="valid",
activation="relu",
strides=1)(x)
conv = MaxPooling1D(pool_size=2)(conv)
conv = Flatten()(conv)
conv_blocks.append(conv)
x = Concatenate()(
conv_blocks) if len(conv_blocks) > 1 else conv_blocks[0]
x = Dropout(self.dropout_prob[1])(x)
x = Dense(self.hidden_dims,
activation="relu",
kernel_initializer=RandomNormal(stddev=self.std),
kernel_regularizer=L1L2(l1=self.l1_reg, l2=self.l2_reg))(x)
preds = Dense(n_classes, activation='softmax')(x)
## return graph model
model = Model(Sequence_in, preds)
model.compile(loss=self.loss,
optimizer=self.optimizer,
metrics=['accuracy'])
self.model = model
def __init__(self,
BiGRU_rand=True,
STATIC=False,
ExternalEmbeddingModel=None,
n_symbols=None,
wordmap=None):
self.embedding_dim = 300
self.hidden_dims = 100
self.dropout_prob = (0.5, 0.8)
self.loss = 'categorical_crossentropy'
self.optimizer = 'rmsprop'
self.l1_reg = 0
self.l2_reg = 3 ##according to kim14
self.std = 0.05 ## standard deviation
# Training Parameters
self.set_training_paramters(batch_size=64, num_epochs=10)
self.set_processing_parameters(
sequence_length=30, vocab_size=50000) ## changed to fit short text
# Defining Model Layers if clstm_rand:
##Embedding Layer Randomly initialized
if BiGRU_rand:
##Embedding Layer Randomly initialized
embedding_layer = Embedding(output_dim=self.embedding_dim,
input_dim=self.vocab_size)
Classes = dh.read_labels()
n_classes = len(Classes)
else:
## Use pretrained model
#n_symbols, wordmap = dh.get_word_map_num_symbols()
self.set_etxrernal_embedding(ExternalEmbeddingModel)
vecDic = dh.GetVecDicFromGensim(self.ExternalEmbeddingModel)
Classes = dh.read_labels()
n_classes = len(Classes)
## Define Embedding Layer
embedding_weights = dh.GetEmbeddingWeights(
embedding_dim=self.embedding_dim,
n_symbols=n_symbols,
wordmap=wordmap,
vecDic=vecDic)
embedding_layer = Embedding(output_dim=self.embedding_dim,
input_dim=n_symbols,
trainable=STATIC)
embedding_layer.build(
(None, )) # if you don't do this, the next step won't work
embedding_layer.set_weights([embedding_weights])
Sequence_in = Input(shape=(self.sequence_length, ), dtype='int32')
embedding_seq = embedding_layer(Sequence_in)
x = Dropout(self.dropout_prob[0])(embedding_seq)
x = Bidirectional(
GRU(self.hidden_dims,
kernel_initializer=RandomNormal(stddev=self.std),
kernel_regularizer=L1L2(l1=self.l1_reg, l2=self.l2_reg),
return_sequences=False))(x)
preds = Dense(n_classes, activation='softmax')(x)
## return graph model
model = Model(Sequence_in, preds)
model.compile(loss=self.loss,
optimizer=self.optimizer,
metrics=['accuracy'])
self.model = model
def __init__(self,
att_rand=True,
ExternalEmbeddingModel=None,
n_symbols=None,
wordmap=None,
STATIC=True):
self.dropout_prob = (0.36, 0.36)
self.hidden_dims = 100
self.std = 0.05
self.l1_reg = 3
self.l2_reg = 3
self.loss = 'categorical_crossentropy'
self.optimizer = 'rmsprop'
self.sequence_length = 30
self.embedding_dim = 300
self.vocab_size = 50000
self.num_epochs = 5
self.batch_size = 64
## Define the BiGRU model
if att_rand:
##Embedding Layer Randomly initialized
embedding_layer = Embedding(output_dim=self.embedding_dim,
input_dim=self.vocab_size)
else:
## Use pretrained model
#n_symbols, wordmap = dh.get_word_map_num_symbols()
self.set_etxrernal_embedding(ExternalEmbeddingModel)
vecDic = dh.GetVecDicFromGensim(self.ExternalEmbeddingModel)
## Define Embedding Layer
embedding_weights = dh.GetEmbeddingWeights(
embedding_dim=self.embedding_dim,
n_symbols=n_symbols,
wordmap=wordmap,
vecDic=vecDic)
embedding_layer = Embedding(output_dim=self.embedding_dim,
input_dim=n_symbols,
trainable=STATIC)
embedding_layer.build(
(None, )) # if you don't do this, the next step won't work
embedding_layer.set_weights([embedding_weights])
###################################################
SeqIn = Input(shape=(self.sequence_length, ), dtype='int32')
embedding_seq = embedding_layer(SeqIn)
M1 = Dropout(self.dropout_prob[0])(embedding_seq)
#M1 = Activation('tanh')(embedding_seq)
activations = Bidirectional(
GRU(self.hidden_dims,
kernel_initializer=RandomNormal(stddev=self.std),
kernel_regularizer=L1L2(l1=self.l1_reg, l2=self.l2_reg),
return_sequences=True))(M1)
## Timedistributed dense for each activation
attention = TimeDistributed(Dense(1, activation='tanh'))(activations)
attention = Flatten()(attention)
attention = Activation('softmax')(attention)
attention = RepeatVector(2 * (self.hidden_dims))(attention)
attention = Permute([2, 1])(attention)
# apply the attention
sent_representation = merge([activations, attention], mode='mul')
sent_representation = Lambda(lambda xin: K.sum(xin, axis=1))(
sent_representation)
Classes = dh.read_labels()
n_classes = len(Classes)
preds = Dense(n_classes, activation='softmax')(sent_representation)
model = Model(input=SeqIn, output=preds)
model.compile(optimizer=self.optimizer,
loss=self.loss,
metrics=['accuracy'])
self.model = model
def __init__(self,
crepe_rand=True,
STATIC=False,
ExternalEmbeddingModel=None,
n_symbols=None,
wordmap=None,
vocabsize=None,
maxseq=None,
embedding_dim=None):
'''
Deep CNN for text classification based on Lecun15
'''
self.embedding_dim = embedding_dim
self.filter_kernels = [7, 7, 3, 3, 3, 3]
self.nb_filters = 256
self.batch_size = 80
self.nb_epochs = 10
self.std = 0.05
self.dropout_prob = (0.5, 0.8)
self.hidden_dim = 300
self.loss = 'categorical_crossentropy'
self.optimizer = 'rmsprop'
''' Set Training Parameters'''
self.set_training_paramters(batch_size=self.batch_size,
num_epochs=self.nb_epochs)
self.set_processing_parameters(sequence_length=maxseq,
vocab_size=vocabsize)
Classes = dh.read_labels()
n_classes = len(Classes)
if crepe_rand:
##Embedding Layer Randomly initialized
embedding_layer = Embedding(output_dim=self.embedding_dim,
input_dim=self.vocab_size)
else:
## Use pretrained model
# n_symbols, wordmap = dh.get_word_map_num_symbols()
self.set_etxrernal_embedding(ExternalEmbeddingModel)
vecDic = dh.GetVecDicFromGensim(self.ExternalEmbeddingModel)
## Define Embedding Layer
embedding_weights = dh.GetEmbeddingWeights(embedding_dim=300,
n_symbols=n_symbols,
wordmap=wordmap,
vecDic=vecDic)
embedding_layer = Embedding(output_dim=self.embedding_dim,
input_dim=n_symbols,
trainable=STATIC)
embedding_layer.build(
(None, )) # if you don't do this, the next step won't work
embedding_layer.set_weights([embedding_weights])
SequenceIn = Input(shape=(self.sequence_length, ), dtype='int32')
embedding_layer = embedding_layer(SequenceIn)
x = Dropout(self.dropout_prob[0])(embedding_layer)
x = Convolution1D(filters=self.nb_filters,
kernel_size=self.filter_kernels[0],
padding='valid',
activation='relu')(x)
#x = MaxPooling1D(pool_size=3)(x)
x = Convolution1D(filters=self.nb_filters,
kernel_size=self.filter_kernels[1],
padding='valid',
activation='relu')(x)
#x = MaxPooling1D(pool_size=4)(x)
x = Convolution1D(filters=self.nb_filters,
kernel_size=self.filter_kernels[2],
padding='valid',
activation='relu')(x)
x = Convolution1D(filters=self.nb_filters,
kernel_size=self.filter_kernels[3],
padding='valid',
activation='relu')(x)
x = Convolution1D(filters=self.nb_filters,
kernel_size=self.filter_kernels[4],
padding='valid',
activation='relu')(x)
x = Convolution1D(filters=self.nb_filters,
kernel_size=self.filter_kernels[5],
padding='valid',
activation='relu')(x)
x = MaxPooling1D(pool_size=3)(x)
x = Flatten()(x)
x = Dense(self.hidden_dim, activation='relu')(x)
x = Dropout(self.dropout_prob[1])(x)
x = Dense(self.hidden_dim, activation='relu')(x)
x = Dropout(self.dropout_prob[1])(x)
preds = Dense(n_classes, activation='softmax')(x)
## return graph model
model = Model(SequenceIn, preds)
model.compile(loss=self.loss,
optimizer=self.optimizer,
metrics=['accuracy'])
self.model = model