def build_model(self, inputs, outputs):
"""
build_model.
Args:
inputs: tensor, input of model
outputs: tensor, output of model
Returns:
None
"""
embed_char = outputs[0]
embed_word = outputs[1]
if self.wclstm_embed_type == "ATTNENTION":
x_word = L.TimeDistributed(
SelfAttention(K.int_shape(embed_word)[-1]))(embed_word)
x_word_shape = K.int_shape(x_word)
x_word = L.Reshape(target_shape=(x_word_shape[:2],
x_word_shape[2] *
x_word_shape[3]))
x_word = L.Dense(self.embed_size,
activation=self.activate_mid)(x_word)
# elif self.wclstm_embed_type == "SHORT":
else:
x_word = L.Lambda(lambda x: x[:, :, 0, :])(embed_word)
outputs_concat = L.Concatenate(axis=-1)([embed_char, x_word])
# LSTM or GRU
if self.rnn_type == "LSTM":
rnn_cell = L.LSTM
elif self.rnn_type == "CuDNNLSTM":
rnn_cell = L.CuDNNLSTM
elif self.rnn_type == "CuDNNGRU":
rnn_cell = L.CuDNNGRU
else:
rnn_cell = L.GRU
# Bi-LSTM-CRF
for nrl in range(self.num_rnn_layers):
x = L.Bidirectional(
rnn_cell(
units=self.rnn_unit * (nrl + 1),
return_sequences=True,
activation=self.activate_mid,
))(outputs_concat)
outputs = L.Dropout(self.dropout)(x)
if self.use_crf:
x = L.Dense(units=self.label,
activation=self.activate_end)(outputs)
self.CRF = ConditionalRandomField(self.crf_lr_multiplier,
name="crf_bert4keras")
self.outputs = self.CRF(x)
self.trans = K.eval(self.CRF.trans).tolist()
self.loss = self.CRF.dense_loss if self.use_onehot else self.CRF.sparse_loss
self.metrics = [
self.CRF.dense_accuracy
if self.use_onehot else self.CRF.sparse_accuracy
]
else:
self.outputs = L.TimeDistributed(
L.Dense(units=self.label,
activation=self.activate_end))(outputs)
self.model = M.Model(inputs, self.outputs)
self.model.summary(132)
def build_model(self, inputs, outputs):
"""
build_model.
Args:
inputs: tensor, input of model
outputs: tensor, output of model
Returns:
None
"""
# CuDNNGRU or GRU
x = None
if self.rnn_type.upper() == "CUDNNGRU":
rnn_cell = L.CuDNNGRU
else:
rnn_cell = L.GRU
# Bi-GRU
for nrl in range(self.num_rnn_layers):
x = L.Bidirectional(
rnn_cell(
units=self.rnn_unit,
return_sequences=True,
activation=self.activate_mid,
))(outputs)
x = L.Dropout(self.dropout)(x)
if self.use_crf:
x = L.Dense(units=self.label, activation=self.activate_end)(x)
self.CRF = ConditionalRandomField(self.crf_lr_multiplier,
name="crf_bert4keras")
self.outputs = self.CRF(x)
self.trans = K.eval(self.CRF.trans).tolist()
self.loss = self.CRF.dense_loss if self.use_onehot else self.CRF.sparse_loss
self.metrics = [
self.CRF.dense_accuracy
if self.use_onehot else self.CRF.sparse_accuracy
]
else:
self.outputs = L.TimeDistributed(
L.Dense(units=self.label, activation=self.activate_end))(x)
self.model = M.Model(inputs, self.outputs)
self.model.summary(132)
def build_model(self, inputs, outputs):
"""
build_model.
Args:
inputs: tensor, input of model
outputs: tensor, output of model
Returns:
None
"""
# LSTM or GRU
if self.rnn_type == "LSTM":
rnn_cell = L.LSTM
elif self.rnn_type == "CuDNNLSTM":
rnn_cell = L.CuDNNLSTM
elif self.rnn_type == "CuDNNGRU":
rnn_cell = L.CuDNNGRU
else:
rnn_cell = L.GRU
# Bi-LSTM-LAN
for nrl in range(self.num_rnn_layers):
x = L.Bidirectional(rnn_cell(units=self.rnn_unit*(nrl+1),
return_sequences=True,
activation=self.activate_mid,
))(outputs)
x_att = SelfAttention(K.int_shape(x)[-1])(x)
outputs = L.Concatenate()([x, x_att])
outputs = L.Dropout(self.dropout)(outputs)
if self.use_crf:
x = L.Dense(units=self.label, activation=self.activate_end)(outputs)
self.CRF = ConditionalRandomField(self.crf_lr_multiplier, name="crf_bert4keras")
self.outputs = self.CRF(x)
self.trans = K.eval(self.CRF.trans).tolist()
self.loss = self.CRF.dense_loss if self.use_onehot else self.CRF.sparse_loss
self.metrics = [self.CRF.dense_accuracy if self.use_onehot else self.CRF.sparse_accuracy]
else:
self.outputs = L.TimeDistributed(L.Dense(units=self.label, activation=self.activate_end))(outputs)
self.model = M.Model(inputs, self.outputs)
self.model.summary(132)
def build_model(self, inputs, outputs):
"""
build_model.
Args:
inputs: tensor, input of model
outputs: tensor, output of model
Returns:
None
"""
# LSTM or GRU
if self.rnn_type == "LSTM":
rnn_cell = L.LSTM
elif self.rnn_type == "CuDNNLSTM":
rnn_cell = L.CuDNNLSTM
elif self.rnn_type == "CuDNNGRU":
rnn_cell = L.CuDNNGRU
else:
rnn_cell = L.GRU
# CNN-LSTM, 提取n-gram特征和最大池化， 一般不用平均池化
conv_pools = []
for i in range(len(self.filters_size)):
conv = L.Conv1D(
name="conv-{0}-{1}".format(i, self.filters_size[i]),
kernel_size=self.filters_size[i],
activation=self.activate_mid,
filters=self.filters_num,
padding='same',
)(outputs)
conv_rnn = L.Bidirectional(
rnn_cell(
name="bi-lstm-{0}-{1}".format(i, self.filters_size[i]),
activation=self.activate_mid,
return_sequences=True,
units=self.rnn_unit,
))(conv)
x_dropout = L.Dropout(rate=self.dropout,
name="dropout-{0}-{1}".format(
i, self.filters_size[i]))(conv_rnn)
conv_pools.append(x_dropout)
# 拼接
x = L.Concatenate(axis=-1)(conv_pools)
x = L.Dropout(self.dropout)(x)
# CRF or Dense
if self.use_crf:
x = L.Dense(units=self.label, activation=self.activate_end)(x)
self.CRF = ConditionalRandomField(self.crf_lr_multiplier,
name="crf_bert4keras")
self.outputs = self.CRF(x)
self.trans = K.eval(self.CRF.trans).tolist()
self.loss = self.CRF.dense_loss if self.use_onehot else self.CRF.sparse_loss
self.metrics = [
self.CRF.dense_accuracy
if self.use_onehot else self.CRF.sparse_accuracy
]
else:
self.outputs = L.TimeDistributed(
L.Dense(units=self.label,
activation=self.activate_end,
name="dense-output"))(x)
self.model = M.Model(inputs, self.outputs)
self.model.summary(132)
def build_model(self, inputs, outputs):
"""
build_model.
Args:
inputs: tensor, input of model
outputs: tensor, output of model
Returns:
None
"""
# CNN, 提取n-gram特征和最大池化, DGCNN膨胀卷积(IDCNN)
conv_pools = []
for i in range(len(self.filters_size)):
conv = L.Conv1D(
name="conv-{0}-{1}".format(i, self.filters_size[i]),
dilation_rate=self.atrous_rates[0],
kernel_size=self.filters_size[i],
activation=self.activate_mid,
filters=self.filters_num,
padding="SAME",
)(outputs)
for j in range(len(self.atrous_rates) - 1):
conv = L.Conv1D(
name="conv-{0}-{1}-{2}".format(i, self.filters_size[i], j),
dilation_rate=self.atrous_rates[j],
kernel_size=self.filters_size[i],
activation=self.activate_mid,
filters=self.filters_num,
padding="SAME",
)(conv)
conv = L.Dropout(
name="dropout-{0}-{1}-{2}".format(i, self.filters_size[i],
j),
rate=self.dropout,
)(conv)
conv_pools.append(conv)
# 拼接
x = L.Concatenate(axis=-1)(conv_pools)
x = L.Dropout(self.dropout)(x)
# CRF or Dense
if self.use_crf:
x = L.Dense(units=self.label, activation=self.activate_end)(x)
self.CRF = ConditionalRandomField(self.crf_lr_multiplier,
name="crf_bert4keras")
self.outputs = self.CRF(x)
self.trans = K.eval(self.CRF.trans).tolist()
self.loss = self.CRF.dense_loss if self.use_onehot else self.CRF.sparse_loss
self.metrics = [
self.CRF.dense_accuracy
if self.use_onehot else self.CRF.sparse_accuracy
]
else:
x = L.Bidirectional(
L.GRU(
activation=self.activate_mid,
return_sequences=True,
units=self.rnn_unit,
name="bi-gru",
))(x)
self.outputs = L.TimeDistributed(
L.Dense(
activation=self.activate_end,
name="dense-output",
units=self.label,
))(x)
self.model = M.Model(inputs, self.outputs)
self.model.summary(132)