def __feedforward(self, inputs, masks, model_dim=None, kernel_size=1, keep_prob=0.5, scope='feed-forward'):
"""Apply Point-wise feed forward layer
"""
with tf.variable_scope(scope):
if not model_dim: model_dim = inputs.get_shape().as_list()[-1]
num_units = [4*model_dim, model_dim]
outputs = feedforward(inputs, masks, num_units=num_units, kernel_size=kernel_size, scope=scope, reuse=None)
outputs = tf.nn.dropout(outputs, keep_prob)
return outputs
def __init__(self,
sequence_length,
num_classes,
pos_vocab_size,
pos_embedding_size,
text_embedding_size,
filter_sizes,
num_heads,
num_filters,
l2_reg_lambda=0.0):
# Placeholders for input, output and dropout
self.text_embedded_chars = tf.placeholder(
tf.float32,
shape=[None, sequence_length, 768],
name='text_embedded_chars')
# self.input_p1 = tf.placeholder(tf.int32, shape=[None, sequence_length], name='input_p1')
# self.input_p2 = tf.placeholder(tf.int32, shape=[None, sequence_length], name='input_p2')
self.input_pos = tf.placeholder(tf.int32,
shape=[None, sequence_length],
name='input_pos')
self.input_y = tf.placeholder(tf.float32,
shape=[None, num_classes],
name='input_y') #[20 19]
self.dropout_keep_prob = tf.placeholder(tf.float32,
name='dropout_keep_prob')
self.emb_dropout_keep_prob = tf.placeholder(
tf.float32, name='emb_dropout_keep_prob')
initializer = tf.keras.initializers.glorot_normal
# Embedding layer
# with tf.device('/device:GPU:0'), tf.variable_scope("text-embedding"):
# # self.W_text = tf.Variable(tf.random_uniform([text_vocab_size, text_embedding_size], -0.25, 0.25), name="W_text")
# # self.text_embedded_chars = tf.nn.embedding_lookup(self.W_text, self.input_text) #[800 90 300]
# # self.text_embedded_chars = server_bert.get_sentence_embedding(self.input_text) #[800 90 768]
# # self.text_embedded_chars_trans = transformer.transformerencoder(self.text_embedded_chars)
# self.text_embedded_chars_change = tf.layers.dense(self.text_embedded_chars, units=300,activation=tf.nn.relu,use_bias=True, trainable=True) #[800 90 300]
# print("change:",self.text_embedded_chars_change.get_shape())# (?, 90, 300)
# self.text_embedded_chars_expanded = tf.expand_dims(self.text_embedded_chars_change, -1) #[800 90 300 1]
# print(self.text_embedded_chars_expanded.get_shape())
with tf.variable_scope("pos-embedding"):
self.W_pos = tf.get_variable("W_pos",
[pos_vocab_size, pos_embedding_size],
initializer=initializer())
self.pos_embedded_chars = tf.nn.embedding_lookup(
self.W_pos, self.input_pos)
# self.p2_embedded_chars = tf.nn.embedding_lookup(self.W_pos, self.input_p2)
self.pos_embedded_chars_expanded = tf.expand_dims(
self.pos_embedded_chars, -1) #[800 90 50 1]
# self.p2_embedded_chars_expanded = tf.expand_dims(self.p2_embedded_chars, -1)
# self.embedded_chars_expanded = tf.concat([self.text_embedded_chars_expanded,
# self.p1_embedded_chars_expanded,
# self.p2_embedded_chars_expanded], 2) #[800 90 400 1]
_embedding_size = 768
self.text_shape = tf.shape(self.text_embedded_chars)
# self.text_expand_shape=tf.shape(self.text_embedded_chars_expanded)
# self.pos_expand_shape=tf.shape(self.p1_embedded_chars_expanded)
# self.embedd_shape=tf.shape(self.text_embedded_chars_change)
# self.embedding_size_shape=tf.shape(_embedding_size)
# Dropout for Word Embedding
with tf.variable_scope('dropout-embeddings'):
self.embedded_chars = tf.nn.dropout(self.text_embedded_chars,
self.emb_dropout_keep_prob)
# self.embedded_chars = tf.layers.dense(self.embedded_chars,units=300,activation=tf.nn.relu,kernel_initializer=initializer())
# self.embedded_chars_expanded = tf.concat([self.embedded_chars, self.pos_embedded_chars], 2)
# self-attention
# with tf.variable_scope("self-attention"):
# self.self_attn_output, self.self_alphas = multihead_attention(self.embedded_chars, self.embedded_chars,
# num_units=768, num_heads=num_heads)
# # print("attention shape:", self.self_attn.get_shape) #(?, 90 ,300)
# # self.fnn_output = fnn(self.self_attn_output)
# self.self_attn = tf.layers.dense(self.self_attn_output, units=300,
# activation=tf.nn.relu, use_bias=True,
# # trainable=True, kernel_initializer=initializer()) # [800 90 300]
dim_model = 768
dim_ff = 3072
num_stack = 1
##transformer
for i in range(num_stack):
with tf.variable_scope("block-{}".format(i)):
# Multi-head Attention (self attention)
with tf.variable_scope("multihead-attention"):
self.mh = multihead_attention(query=self.embedded_chars,
key=self.embedded_chars,
value=self.embedded_chars,
dim_model=dim_model,
num_head=num_heads)
# Residual & Layer Normalization
self.mh = tf.contrib.layers.layer_norm(
self.embedded_chars + self.mh)
# Position-wise Feed Forward
with tf.variable_scope("position-wise-feed-forward"):
self.ff = feedforward(self.mh, dim_model, dim_ff)
# Residual & Layer Normalization
self.enc = tf.contrib.layers.layer_norm(self.mh + self.ff)
# self.enc_expand = tf.expand_dims(self.enc, axis=-1)
# self.smp = tf.nn.max_pool(value=self.enc_expand, ksize=[1, 1, 2, 1], strides=[1, 1, 2, 1],
# padding='SAME')
# self.self_attn = tf.layers.dense(self.embedded_chars, units=300,
# activation=tf.nn.relu, use_bias=True,
# trainable=True, kernel_initializer=initializer()) # [800 90 300]
# self.enc_change = tf.layers.conv1d(inputs=self.enc, filters=300, kernel_size=1, activation=tf.nn.relu,
# kernel_initializer=initializer())
# print("change:", self.enc.get_shape()) # (?, 90, 300)
self.self_atten_change = tf.expand_dims(self.enc, -1) #[800 90 300 1]
# Create a convolution + maxpool layer for each filter size
pooled_outputs = []
for i, filter_size in enumerate(filter_sizes):
with tf.variable_scope("conv-maxpool-%s" % filter_size):
# Convolution Layer
conv = tf.layers.conv2d(
self.self_atten_change,
num_filters, [filter_size, _embedding_size],
activation=tf.nn.relu,
padding="SAME",
strides=(1, _embedding_size),
name="conv") # num_filter=128,filter_size=2,3,4,5
print(conv.get_shape()
) # (?,89,1, 128);(?88,1,128)(?87,1,128)(?86 1 128)
# R = tf.squeeze(conv,axis=-2)
# print(R.get_shape())
# Maxpooling over the outputs
pooled = tf.nn.max_pool(conv,
ksize=[1, sequence_length, 1, 1],
strides=[1, sequence_length, 1, 1],
padding='SAME',
name="pool")
print(pooled.get_shape()) # (?, 1, 1, 128)
pooled_outputs.append(pooled)
# Combine all the pooled features
num_filters_total = num_filters * len(filter_sizes)
# print(pooled_outputs.get_shape())
print(np.array(pooled_outputs).shape) #（4，）
self.h_pool = tf.concat(pooled_outputs, 3)
# print(self.h_pool.get_shape()) #(?,1,1,512)
self.h_pool_flat = tf.reshape(self.h_pool, [-1, num_filters_total])
# print(self.h_pool_flat.get_shape())#(?,512)
# Add dropout
with tf.variable_scope("dropout"):
self.h_drop = tf.nn.dropout(self.h_pool_flat,
self.dropout_keep_prob)
# Final scores and predictions
with tf.variable_scope("output"):
self.logits = tf.layers.dense(self.h_drop,
num_classes,
kernel_initializer=initializer())
print(self.logits.get_shape()) #(?,19)
self.predictions = tf.argmax(self.logits, 1, name="predictions")
# Calculate mean cross-entropy loss
with tf.variable_scope("loss"):
losses = tf.nn.softmax_cross_entropy_with_logits_v2(
logits=self.logits, labels=self.input_y)
self.l2 = tf.add_n(
[tf.nn.l2_loss(v) for v in tf.trainable_variables()])
self.loss = tf.reduce_mean(losses) + l2_reg_lambda * self.l2
# Accuracy
with tf.name_scope("accuracy"):
correct_predictions = tf.equal(self.predictions,
tf.argmax(self.input_y, 1))
self.accuracy = tf.reduce_mean(tf.cast(correct_predictions,
tf.float32),
name="accuracy")
def __init__(self,
sequence_length,
num_classes,
pos_vocab_size,
pos_embedding_size,
text_embedding_size,
filter_sizes,
num_heads,
num_filters,
l2_reg_lambda=0.0):
# Placeholders for input, output and dropout
self.text_embedded_chars = tf.placeholder(
tf.float32,
shape=[None, sequence_length, 768],
name='text_embedded_chars')
# self.input_p1 = tf.placeholder(tf.int32, shape=[None, sequence_length], name='input_p1')
# self.input_p2 = tf.placeholder(tf.int32, shape=[None, sequence_length], name='input_p2')
self.e1_index = tf.placeholder(tf.int32, shape=[None], name="e1_start")
self.e2_index = tf.placeholder(tf.int32, shape=[None], name="e1_end")
# self.e1_embeded = tf.placeholder(tf.float32, shape=[None, 768], name="e1_embedding")
# self.e2_embeded = tf.placeholder(tf.float32, shape=[None, 768], name="e2_embedding")
self.input_pos = tf.placeholder(tf.int32,
shape=[None, sequence_length],
name='input_pos')
self.input_y = tf.placeholder(tf.float32,
shape=[None, num_classes],
name='input_y') #[20 19]
self.dropout_keep_prob = tf.placeholder(tf.float32,
name='dropout_keep_prob')
self.emb_dropout_keep_prob = tf.placeholder(
tf.float32, name='emb_dropout_keep_prob')
initializer = tf.keras.initializers.glorot_normal
# Embedding layer
# with tf.device('/device:GPU:0'), tf.variable_scope("text-embedding"):
# # self.W_text = tf.Variable(tf.random_uniform([text_vocab_size, text_embedding_size], -0.25, 0.25), name="W_text")
# # self.text_embedded_chars = tf.nn.embedding_lookup(self.W_text, self.input_text) #[800 90 300]
# # self.text_embedded_chars = server_bert.get_sentence_embedding(self.input_text) #[800 90 768]
# # self.text_embedded_chars_trans = transformer.transformerencoder(self.text_embedded_chars)
# self.text_embedded_chars_change = tf.layers.dense(self.text_embedded_chars, units=300,activation=tf.nn.relu,use_bias=True, trainable=True) #[800 90 300]
# print("change:",self.text_embedded_chars_change.get_shape())# (?, 90, 300)
# self.text_embedded_chars_expanded = tf.expand_dims(self.text_embedded_chars_change, -1) #[800 90 300 1]
# print(self.text_embedded_chars_expanded.get_shape())
with tf.variable_scope("pos-embedding"):
self.W_pos = tf.get_variable("W_pos",
[pos_vocab_size, pos_embedding_size],
initializer=initializer())
self.pos_embedded_chars = tf.nn.embedding_lookup(
self.W_pos, self.input_pos)
# self.p2_embedded_chars = tf.nn.embedding_lookup(self.W_pos, self.input_p2)
self.pos_embedded_chars_expanded = tf.expand_dims(
self.pos_embedded_chars, -1) #[800 90 50 1]
# self.p2_embedded_chars_expanded = tf.expand_dims(self.p2_embedded_chars, -1)
# self.text_embedded_chars_re = tf.reshape(self.text_embedded_chars,[tf.shape(self.text_embedded_chars)[0]*tf.shape(self.text_embedded_chars)[1], 768])
# print(self.text_embedded_chars_re.get_shape())
# e1_embedded = tf.nn.embedding_lookup(self.text_embedded_chars_re,self.e1_index)
# e2_embedded = tf.nn.embedding_lookup(self.text_embedded_chars_re, self.e2_index)
# alpha = attention_2(self.text_embedded_chars, e1_embedded,e2_embedded)
# self.text_embedded_chars_attention = tf.reduce_sum(tf.multiply(self.text_embedded_chars, tf.expand_dims(alpha, -1)), 1)
# self.text_embedded_chars_attention = tf.multiply(self.text_embedded_chars, tf.expand_dims(alpha, -1))
# print("attention_shape:", self.text_embedded_chars_attention.get_shape())
# self.e1_e2_embeded_2 = tf.expand_dims(self.text_embedded_chars_attention, axis=1)
# self.text_embedded_chars_2 = tf.concat([self.text_embedded_chars,self.text_embedded_chars_attention], axis=-1)
# self.text_embedded_chars_2 = tf.add(self.text_embedded_chars, self.text_embedded_chars_attention)
# self.text_embedded_chars_3 = tf.nn.tanh(self.text_embedded_chars_2)
# print("e1_shape,",e1_embedded.get_shape())
# self.embedded_chars_expanded = tf.concat([self.text_embedded_chars_expanded,
# self.p1_embedded_chars_expanded,
# self.p2_embedded_chars_expanded], 2) #[800 90 400 1]
_embedding_size = 768
self.text_shape = tf.shape(self.text_embedded_chars)
# self.text_expand_shape=tf.shape(self.text_embedded_chars_expanded)
# self.pos_expand_shape=tf.shape(self.p1_embedded_chars_expanded)
# self.embedd_shape=tf.shape(self.text_embedded_chars_change)
# self.embedding_size_shape=tf.shape(_embedding_size)
# self.text_expand_shape=tf.shape(self.text_embedded_chars_expanded)
# self.pos_expand_shape=tf.shape(self.p1_embedded_chars_expanded)
# self.embedd_shape=tf.shape(self.text_embedded_chars_change)
# self.embedding_size_shape=tf.shape(_embedding_size)
# self.e1_embeded_dense = tf.layers.dense(self.e1_embeded, units=768, activation=tf.nn.tanh)
# self.e2_embeded_dense = tf.layers.dense(self.e2_embeded, units=768, activation=tf.nn.tanh)
# self.e1_embeded_dense = tf.nn.tanh(self.e1_embeded)
# self.e2_embeded_dense = tf.nn.tanh(self.e2_embeded )
# self.e1_embeded_2 = tf.expand_dims(self.e1_embeded, axis=1)
# # print(self.e1_embeded.get_shape())
# self.e2_embeded_2 = tf.expand_dims(self.e2_embeded, axis=1)
# self.text_embedded_chars_2 = tf.concat([self.text_embedded_chars,self.e1_embeded_2, self.e2_embeded_2], axis=1)
# print("embedded_char_dim",self.text_embedded_chars_2.get_shape())
# e1_h = tf.reshape(tf.tile(self.e1_embeded, [1, sequence_length]), [-1, sequence_length, 768])
# e2_h = tf.reshape(tf.tile(self.e2_embeded, [1, sequence_length]), [-1, sequence_length, 768])
# self.text_embedded_chars1 = tf.add(self.text_embedded_chars,e1_h)
# self.text_embedded_chars_2 = tf.add(self.text_embedded_chars1,e2_h)
# self.text_embedded_chars_dense = tf.layers.dense(self.text_embedded_chars_2, units=768, activation=tf.nn.relu)
# self.text_embedded_chars_dense = tf.layers.dense(tf.nn.relu(self.text_embedded_chars_2), units=768)
# print(self.text_embedded_chars_2.get_shape())
#entity-aware
# Dropout for Word Embedding
with tf.variable_scope('dropout-embeddings'):
# self.embedded_chars_expanded = tf.concat([self.text_embedded_chars, self.pos_embedded_chars], 2)
self.embedded_chars = tf.nn.dropout(self.text_embedded_chars,
self.emb_dropout_keep_prob)
# alpha = attention_2(self.embedded_chars, self.e1_embeded, self.e2_embeded)
# self.embedded_chars = tf.multiply(self.embedded_chars_2, tf.expand_dims(alpha, -1))
# self.embedded_chars= tf.contrib.layers.layer_norm(self.embedded_chars_3 + self.embedded_chars_2)
# self.embedded_chars_expanded = tf.concat([self.embedded_chars, self.pos_embedded_chars], 2)
# self-attention
# with tf.variable_scope("self-attention"):
# self.self_attn_output, self.self_alphas = multihead_attention(self.embedded_chars, self.embedded_chars,
# num_units=768, num_heads=num_heads)
# # print("attention shape:", self.self_attn.get_shape) #(?, 90 ,300)
# # self.fnn_output = fnn(self.self_attn_output)
# self.self_attn = tf.layers.dense(self.self_attn_output, units=300,
# activation=tf.nn.relu, use_bias=True,
# trainable=True, kernel_initializer=initializer()) # [800 90 300]
dim_model = 768
dim_ff = 3072
num_stack = 1
##transformer
for i in range(num_stack):
with tf.variable_scope("block-{}".format(i)):
# Multi-head Attention (self attention)
with tf.variable_scope("multihead-attention"):
self.mh = multihead_attention(query=self.embedded_chars,
key=self.embedded_chars,
value=self.embedded_chars,
dim_model=dim_model,
num_head=num_heads)
# Residual & Layer Normalization
self.mh = tf.contrib.layers.layer_norm(
self.embedded_chars + self.mh)
# Position-wise Feed Forward
with tf.variable_scope("position-wise-feed-forward"):
self.ff = feedforward(self.mh, dim_model, dim_ff)
# Residual & Layer Normalization
self.enc = tf.contrib.layers.layer_norm(self.mh + self.ff)
# alpha = attention(self.enc)
# self.batch_size = tf.shape(self.enc)[0]
# print(self.batch_size)
# e1_embedd = tf.reduce_sum(self.enc[0][self.e1_start[0]:self.e1_end[0]], axis=0)
# print(self.enc.shape[0].value)
# print(tf.size(self.enc).eval())
# for i in range(1, tf.shape(self.enc)[0].eval()):
# e1 = tf.reduce_sum(self.enc[i][self.e1_start[i]:self.e1_end[i] + 1], axis=0)
# # print("e1 shape",e1.shape)
# # e2 = np.mean(text_embedded_chars[i][train_be2_start[i]:train_be2_end[i] + 1], axis=0)
# e1_embedd = np.vstack((e1_embedd, e1))
# # e2_embedd = np.vstack((e2_embedd, e2))
# print(e1_embedd.get_shape())
# print(e1_embedd.shape)
# e2_embedd = np.mean(text_embedded_chars[0][train_be2_start[0]:train_be2_end[0] + 1], axis=0)
# for i in range(1, text_embedded_chars.shape[0]):
# e1 = np.mean(text_embedded_chars[i][train_be1_start[i]:train_be1_end[i] + 1], axis=0)
# # print("e1 shape",e1.shape)
# e2 = np.mean(text_embedded_chars[i][train_be2_start[i]:train_be2_end[i] + 1], axis=0)
# e1_embedd = np.vstack((e1_embedd, e1))
# e2_embedd = np.vstack((e2_embedd, e2))
# self.enc_expand = tf.expand_dims(self.enc, axis=-1)
# self.smp = tf.nn.max_pool(value=self.enc_expand, ksize=[1, 1, 2, 1], strides=[1, 1, 2, 1],
# padding='SAME')
# self.self_attn = tf.layers.dense(self.enc, units=300,
# activation=tf.nn.relu, use_bias=True,
# trainable=True, kernel_initializer=initializer()) # [800 90 300]
# self.enc_change = tf.layers.conv1d(inputs=self.enc, filters=300, kernel_size=1, activation=tf.nn.relu,
# kernel_initializer=initializer())
# print("change:", self.enc.get_shape()) # (?, 90, 300)
self.self_atten_change = tf.expand_dims(self.enc, -1) #[800 90 300 1]
# i=0
# n = tf.shape(self.enc)[0]
# def cond(i,n):
# return i<n
# def body(i,n):
# e1 =
# tf.while_loop
self.embedd_dense = tf.layers.dense(self.embedded_chars,
units=300,
activation=tf.nn.relu,
use_bias=True,
trainable=True,
kernel_initializer=initializer())
self.text_embedded_chars_re = tf.reshape(self.embedd_dense, [
tf.shape(self.embedd_dense)[0] * tf.shape(self.embedd_dense)[1],
300
])
print(self.text_embedded_chars_re.get_shape())
self.e1_embedded = tf.nn.embedding_lookup(self.text_embedded_chars_re,
self.e1_index)
e2_embedded = tf.nn.embedding_lookup(self.text_embedded_chars_re,
self.e2_index)
e1_output, e2_output = attention_entity(self.embedd_dense,
self.e1_embedded, e2_embedded)
# e1_embedded_dense = tf.layers.dense(e1_embedded, units=128, use_bias=False, activation=tf.nn.relu,
# kernel_initializer=initializer())
# e2_embedded_dense = tf.layers.dense(e2_embedded, units=128, use_bias=False, activation=tf.nn.relu,
# kernel_initializer=initializer())
# print("e1_shape:",e1_embedded.get_shape())
# alpha = attention_2(self.enc, self.e1_index, self.e2_index)
# print("alpha:", alpha.get_shape())
# self.enc_attention = tf.reduce_sum(tf.multiply(self.enc, tf.expand_dims(alpha, -1)),axis=1)
# print(self.enc_attention.get_shape())
# # self.e1_e2_embeded_2 = tf.expand_dims(self.enc_attention, axis=1)
# self.text_embedded_chars_2 = tf.add(self.enc, self.enc_attention)
# # self.text_embedded_chars_2 = tf.concat([self.enc, self.enc_attention], -1)
# self.self_atten_change = tf.expand_dims(self.text_embedded_chars_2, -1)
# Create a convolution + maxpool layer for each filter size
pooled_outputs = []
for i, filter_size in enumerate(filter_sizes):
with tf.variable_scope("conv-maxpool-%s" % filter_size):
# Convolution Layer
conv = tf.layers.conv2d(
self.self_atten_change,
num_filters, [filter_size, _embedding_size],
kernel_initializer=initializer(),
activation=tf.nn.relu,
padding="SAME",
strides=(1, _embedding_size),
name="conv") # num_filter=128,filter_size=2,3,4,5
print(conv.get_shape()
) # (?,89,1, 128);(?88,1,128)(?87,1,128)(?86 1 128)
# if filter_size==3:
pooled = tf.nn.max_pool(conv,
ksize=[1, sequence_length, 1, 1],
strides=[1, sequence_length, 1, 1],
padding='SAME',
name="pool")
print(pooled.get_shape()) # (?, 1, 1, 128)
pooled_outputs.append(pooled)
# Combine all the pooled features
num_filters_total = num_filters * len(filter_sizes)
# print(pooled_outputs.get_shape())
print(np.array(pooled_outputs).shape) #（4，）
self.h_pool = tf.concat(pooled_outputs, 2)
# print(self.h_pool.get_shape()) #(?,1,1,512)
self.h_pool_flat = tf.reshape(self.h_pool, [-1, num_filters_total])
self.h_pool_flat_2 = tf.concat(
[self.h_pool_flat, e1_output, e2_output], axis=-1)
print(self.h_pool_flat.get_shape()) #(?,512)
print(self.h_pool_flat_2.get_shape())
# Add dropout
with tf.variable_scope("dropout"):
self.h_drop = tf.nn.dropout(self.h_pool_flat_2,
self.dropout_keep_prob)
print(self.h_drop.get_shape())
# Final scores and predictions
with tf.variable_scope("output"):
self.logits = tf.layers.dense(self.h_drop,
num_classes,
kernel_initializer=initializer())
print(self.logits.get_shape()) #(?,19)
self.predictions = tf.argmax(self.logits, 1, name="predictions")
# Calculate mean cross-entropy loss
with tf.variable_scope("loss"):
losses = tf.nn.softmax_cross_entropy_with_logits_v2(
logits=self.logits, labels=self.input_y)
self.l2 = tf.add_n(
[tf.nn.l2_loss(v) for v in tf.trainable_variables()])
self.loss = tf.reduce_mean(losses) + l2_reg_lambda * self.l2
# Accuracy
with tf.name_scope("accuracy"):
correct_predictions = tf.equal(self.predictions,
tf.argmax(self.input_y, 1))
self.accuracy = tf.reduce_mean(tf.cast(correct_predictions,
tf.float32),
name="accuracy")
def __init__(self, sequence_length, num_classes,
text_vocab_size, text_embedding_size, pos_vocab_size, pos_embedding_size,
filter_sizes, num_filters, l2_reg_lambda=0.0, use_elmo=False):
# Placeholders for input, output and dropout
self.input_text = tf.placeholder(tf.int32, shape=[None, sequence_length], name='input_text')
self.input_x_text = tf.placeholder(tf.string, shape=[None,], name='input_x_text')
self.input_p1 = tf.placeholder(tf.int32, shape=[None, sequence_length], name='input_p1')
self.input_p2 = tf.placeholder(tf.int32, shape=[None, sequence_length], name='input_p2')
self.input_y = tf.placeholder(tf.float32, shape=[None, num_classes], name='input_y')
self.dropout_keep_prob = tf.placeholder(tf.float32, name='dropout_keep_prob')
initializer = tf.keras.initializers.glorot_normal
# Embedding layer
if use_elmo:
# Contextual Embedding Layer
with tf.variable_scope("elmo-embeddings"):
elmo_model = hub.Module("/home/wangyan/relation_extraction/ELMo", trainable=True)
self.text_embedded_chars = elmo_model(self.input_x_text, signature="default", as_dict=True)["elmo"]
# print(list(self.input_x_text)[:2])
print("embedding_shape:", self.text_embedded_chars.get_shape())
# sequence_length =self.text_embedded_chars.shape[1].value
else:
with tf.device('/cpu:0'), tf.variable_scope("text-embedding"):
self.W_text = tf.Variable(tf.random_uniform([text_vocab_size, text_embedding_size], -0.25, 0.25), name="W_text")
self.text_embedded_chars = tf.nn.embedding_lookup(self.W_text, self.input_text) #[800 90 300]
with tf.variable_scope('dropout-embeddings'):
# self.embedded_chars_expanded = tf.concat([self.text_embedded_chars, self.pos_embedded_chars], 2)
self.embedded_chars = tf.nn.dropout(self.text_embedded_chars, self.dropout_keep_prob)
# self.embedded_chars = tf.layers.dense(self.embedded_chars, units=300,
# activation=tf.nn.relu, use_bias=True,
# trainable=True, kernel_initializer=initializer())
dim_model = 100
dim_ff = 400
num_stack = 1
num_heads = 12
# self.embedded_chars = self.text_embedded_chars
##transformer
for i in range(num_stack):
with tf.variable_scope("block-{}".format(i)):
# Multi-head Attention (self attention)
with tf.variable_scope("multihead-attention"):
self.mh = multihead_attention(query=self.embedded_chars, key=self.embedded_chars,
value=self.embedded_chars,
dim_model=dim_model, num_head=num_heads)
# Residual & Layer Normalization
self.mh = tf.contrib.layers.layer_norm(self.embedded_chars + self.mh)
# Position-wise Feed Forward
with tf.variable_scope("position-wise-feed-forward"):
self.ff = feedforward(self.mh, dim_model, dim_ff)
# Residual & Layer Normalization
self.enc = tf.contrib.layers.layer_norm(self.mh + self.ff)
# self.enc_change = tf.layers.conv1d(inputs=self.enc, filters=300, kernel_size=1, activation=tf.nn.relu)
# self.self_attn = tf.layers.dense(self.enc, units=300,
# activation=tf.nn.relu, use_bias=True,
# trainable=True, kernel_initializer=initializer()) # [800 90 300]
print("change:", self.enc.get_shape()) # (?, 90, 300)
self.self_atten_change = tf.expand_dims(self.enc, -1) # [800 90 300 1]dim_model = 1024
# with tf.device('/cpu:0'), tf.variable_scope("position-embedding"):
# self.W_pos = tf.get_variable("W_pos", [pos_vocab_size, pos_embedding_size], initializer=initializer())
# self.p1_embedded_chars = tf.nn.embedding_lookup(self.W_pos, self.input_p1)
# self.p2_embedded_chars = tf.nn.embedding_lookup(self.W_pos, self.input_p2)
# self.p1_embedded_chars_expanded = tf.expand_dims(self.p1_embedded_chars, -1) #[800 90 50 1]
# self.p2_embedded_chars_expanded = tf.expand_dims(self.p2_embedded_chars, -1)
# self.embedded_chars_expanded = tf.concat([self.text_embedded_chars_expanded,
# self.p1_embedded_chars_expanded,
# self.p2_embedded_chars_expanded], 2) #[800 90 400 1]
_embedding_size = 100
self.text_shape=tf.shape(self.text_embedded_chars)
self.text_expand_shape=tf.shape(self.self_atten_change)
# self.pos_expand_shape=tf.shape(self.p1_embedded_chars_expanded)
# self.embedd_shape=tf.shape(self.embedded_chars_expanded)
self.embedding_size_shape=tf.shape(_embedding_size)
# Create a convolution + maxpool layer for each filter size
pooled_outputs = []
for i, filter_size in enumerate(filter_sizes):
with tf.variable_scope("conv-maxpool-%s" % filter_size):
# Convolution Layer
conv = tf.layers.conv2d(self.self_atten_change, num_filters, [filter_size, _embedding_size],
kernel_initializer=initializer(), activation=tf.nn.relu, padding="SAME",
strides=(1, _embedding_size),
name="conv") # num_filter=128,filter_size=2,3,4,5
print(conv.get_shape()) # (?,89,1, 128);(?88,1,128)(?87,1,128)(?86 1 128)
# R = tf.squeeze(conv,axis=-2)
# print(R.get_shape())
# Maxpooling over the outputs
pooled = tf.nn.max_pool(conv, ksize=[1, sequence_length, 1, 1],
strides=[1, sequence_length, 1, 1], padding='SAME', name="pool")
print(pooled.get_shape()) # (?, 1, 1, 128)
pooled_outputs.append(pooled)
# Combine all the pooled features
num_filters_total = num_filters * len(filter_sizes)
print(np.array(pooled_outputs).shape)#(4,)
self.h_pool = tf.concat(pooled_outputs, 3)
print(self.h_pool.get_shape()) #(?,1,1,512)
self.h_pool_flat = tf.reshape(self.h_pool, [-1, num_filters_total])
print(self.h_pool_flat.get_shape()) #(?,512)
# Add dropout
with tf.variable_scope("dropout"):
self.h_drop = tf.nn.dropout(self.h_pool_flat, self.dropout_keep_prob)
# Final scores and predictions
with tf.variable_scope("output"):
self.logits = tf.layers.dense(self.h_drop, num_classes, kernel_initializer=initializer())
self.predictions = tf.argmax(self.logits, 1, name="predictions")
# Calculate mean cross-entropy loss
with tf.variable_scope("loss"):
losses = tf.nn.softmax_cross_entropy_with_logits_v2(logits=self.logits, labels=self.input_y)
self.l2 = tf.add_n([tf.nn.l2_loss(v) for v in tf.trainable_variables()])
self.loss = tf.reduce_mean(losses) + l2_reg_lambda * self.l2
# Accuracy
with tf.name_scope("accuracy"):
correct_predictions = tf.equal(self.predictions, tf.argmax(self.input_y, 1))
self.accuracy = tf.reduce_mean(tf.cast(correct_predictions, tf.float32), name="accuracy")
def __init__(self,
sequence_length,
num_classes,
pos_vocab_size,
pos_embedding_size,
text_embedding_size,
filter_sizes,
num_heads,
num_filters,
l2_reg_lambda=0.0):
# Placeholders for input, output and dropout
self.text_embedded_chars = tf.placeholder(
tf.float32,
shape=[None, sequence_length, 768],
name='text_embedded_chars')
# self.input_p1 = tf.placeholder(tf.int32, shape=[None, sequence_length], name='input_p1')
# self.input_p2 = tf.placeholder(tf.int32, shape=[None, sequence_length], name='input_p2')
self.e1_start = tf.placeholder(tf.int32, shape=[None], name="e1_start")
self.e2_start = tf.placeholder(tf.int32, shape=[None], name="e2_start")
self.e1_end = tf.placeholder(tf.int32, shape=[None], name="e1_end")
self.e2_end = tf.placeholder(tf.int32, shape=[None], name="e2_end")
self.batch_size_len = tf.placeholder(tf.int32, name="batch_size_len")
# self.e1_embeded = tf.placeholder(tf.float32, shape=[None, 768], name="e1_embedding")
# self.e2_embeded = tf.placeholder(tf.float32, shape=[None, 768], name="e2_embedding")
self.input_pos = tf.placeholder(tf.int32,
shape=[None, sequence_length],
name='input_pos')
self.input_y = tf.placeholder(tf.float32,
shape=[None, num_classes],
name='input_y') #[20 19]
self.dropout_keep_prob = tf.placeholder(tf.float32,
name='dropout_keep_prob')
self.emb_dropout_keep_prob = tf.placeholder(
tf.float32, name='emb_dropout_keep_prob')
initializer = tf.keras.initializers.glorot_normal
# Embedding layer
# with tf.device('/device:GPU:0'), tf.variable_scope("text-embedding"):
# # self.W_text = tf.Variable(tf.random_uniform([text_vocab_size, text_embedding_size], -0.25, 0.25), name="W_text")
# # self.text_embedded_chars = tf.nn.embedding_lookup(self.W_text, self.input_text) #[800 90 300]
# # self.text_embedded_chars = server_bert.get_sentence_embedding(self.input_text) #[800 90 768]
# # self.text_embedded_chars_trans = transformer.transformerencoder(self.text_embedded_chars)
# self.text_embedded_chars_change = tf.layers.dense(self.text_embedded_chars, units=300,activation=tf.nn.relu,use_bias=True, trainable=True) #[800 90 300]
# print("change:",self.text_embedded_chars_change.get_shape())# (?, 90, 300)
# self.text_embedded_chars_expanded = tf.expand_dims(self.text_embedded_chars_change, -1) #[800 90 300 1]
# print(self.text_embedded_chars_expanded.get_shape())
with tf.variable_scope("pos-embedding"):
self.W_pos = tf.get_variable("W_pos",
[pos_vocab_size, pos_embedding_size],
initializer=initializer())
self.pos_embedded_chars = tf.nn.embedding_lookup(
self.W_pos, self.input_pos)
# self.p2_embedded_chars = tf.nn.embedding_lookup(self.W_pos, self.input_p2)
self.pos_embedded_chars_expanded = tf.expand_dims(
self.pos_embedded_chars, -1) #[800 90 50 1]
# self.p2_embedded_chars_expanded = tf.expand_dims(self.p2_embedded_chars, -1)
_embedding_size = 768
# Dropout for Word Embedding
with tf.variable_scope('dropout-embeddings'):
# self.embedded_chars_expanded = tf.concat([self.text_embedded_chars, self.pos_embedded_chars], 2)
self.embedded_chars = tf.nn.dropout(self.text_embedded_chars,
self.emb_dropout_keep_prob)
dim_model = 768
dim_ff = 3072
num_stack = 1
##transformer
for i in range(num_stack):
with tf.variable_scope("block-{}".format(i)):
# Multi-head Attention (self attention)
with tf.variable_scope("multihead-attention"):
self.mh = multihead_attention(query=self.embedded_chars,
key=self.embedded_chars,
value=self.embedded_chars,
dim_model=dim_model,
num_head=num_heads)
# Residual & Layer Normalization
self.mh = tf.contrib.layers.layer_norm(
self.embedded_chars + self.mh)
# Position-wise Feed Forward
with tf.variable_scope("position-wise-feed-forward"):
self.ff = feedforward(self.mh, dim_model, dim_ff)
# Residual & Layer Normalization
self.enc = tf.contrib.layers.layer_norm(self.mh + self.ff)
print(self.enc.shape[0].value)
print(self.batch_size_len)
m = tf.constant(value=32, dtype=tf.int32)
print(m)
print(tf.shape(self.enc)[0])
print(FLAGS.batch_size_len)
print("e1_start:", self.e1_start.get_shape())
def true_func():
e1_embedd = tf.expand_dims(tf.reduce_mean(
self.enc[0][self.e1_start[0]:self.e1_end[0] + 1], axis=0),
axis=0)
e2_embedd = tf.expand_dims(tf.reduce_mean(
self.enc[0][self.e2_start[0]:self.e2_end[0] + 1], axis=0),
axis=0)
print("e1 shape", e1_embedd.shape)
for i in range(1, 32):
e1 = tf.expand_dims(tf.reduce_mean(
self.enc[i][self.e1_start[i]:self.e1_end[i] + 1], axis=0),
axis=0)
e2 = tf.expand_dims(tf.reduce_mean(
self.enc[i][self.e2_start[i]:self.e2_end[i] + 1], axis=0),
axis=0)
e1_embedd = tf.concat([e1_embedd, e1], axis=0)
e2_embedd = tf.concat([e2_embedd, e2], axis=0)
print("embed shape:", e1_embedd.shape)
# e1_embedd = tf.nn.relu(e1_embedd)
# e2_embedd = tf.nn.relu(e2_embedd)
print("embed shape:", e1_embedd.shape)
return e1_embedd, e2_embedd
def false_func():
e1_embedd = tf.expand_dims(tf.reduce_mean(
self.enc[0][self.e1_start[0]:self.e1_end[0] + 1], axis=0),
axis=0)
e2_embedd = tf.expand_dims(tf.reduce_mean(
self.enc[0][self.e2_start[0]:self.e2_end[0] + 1], axis=0),
axis=0)
print("e1 shape", e1_embedd.shape)
for i in range(1, 29):
e1 = tf.expand_dims(tf.reduce_mean(
self.enc[i][self.e1_start[i]:self.e1_end[i] + 1], axis=0),
axis=0)
# print(self.enc.shape[0].value)
# print("e1 shape",e1.shape)
# print("i:",FLAGS.batch_size_len)
e2 = tf.expand_dims(tf.reduce_mean(
self.enc[i][self.e2_start[i]:self.e2_end[i] + 1], axis=0),
axis=0)
e1_embedd = tf.concat([e1_embedd, e1], axis=0)
e2_embedd = tf.concat([e2_embedd, e2], axis=0)
print("embed shape 1:", e1_embedd.shape)
# e1_embedd = tf.nn.relu(e1_embedd)
# e2_embedd = tf.nn.relu(e2_embedd)
print("embed shape 1:", e1_embedd.shape)
return e1_embedd, e2_embedd
e1_embedd_2, e2_embedd_2 = tf.cond(pred=tf.equal(
m, self.batch_size_len),
true_fn=true_func,
false_fn=false_func)
print("embed shape 2:", e1_embedd_2.shape)
# def extract_entity(x, e):
# e_idx = tf.concat([tf.expand_dims(tf.range(tf.shape(e)[0]), axis=-1), tf.expand_dims(e, axis=-1)], axis=-1)
# return tf.gather_nd(x, e_idx)
#
# # self.enc_dense = tf.layers.dense(self.enc, units=128, activation=tf.nn.relu, kernel_initializer=initializer())
# e1_end = extract_entity(self.enc, self.e1_end) # (batch, hidden)
# e1_start = extract_entity(self.enc, self.e1_start)
# print("e1_h", e1_end.get_shape())
# e2_end = extract_entity(self.enc, self.e2_end) # (batch, hidden)
# e2_start = extract_entity(self.enc, self.e2_start)
# e1_h_add = (e1_start+e1_end)/2.0
# e2_h_add = (e2_start+e2_end)/2.0
# alpha = attention_4(self.enc , e1_h, e2_h)
# self.enc_attention = tf.reduce_sum(tf.multiply(self.enc, tf.expand_dims(alpha, -1)), axis=1)
# self.enc_attention_h = tf.expand_dims(self.enc_attention,1)
# e1_h = tf.expand_dims(e1_h,1)
# e2_h = tf.expand_dims(e2_h,1)
# print(e1_h.get_shape())
# e1_end_h = tf.expand_dims(e1_end, 1)
# e2_end_h = tf.expand_dims(e2_end,1)
# e1_start_h = tf.expand_dims(e1_start, 1)
# e2_start_h = tf.expand_dims(e2_start, 1)
# print(e1_end_h.get_shape())
# e1_h = (e1_start_h + e1_end_h)/2.0
# e2_h = (e2_start_h + e2_end_h)/2.0
# e1_h = tf.reshape(tf.tile(e1_h_add, [1, sequence_length]), [-1, sequence_length, 128]) # (batch, seq_len, hidden_size)
# e2_h = tf.reshape(tf.tile(e2_h_add, [1, sequence_length]), [-1, sequence_length, 128]) # (batch, seq_len, hidden_size)
# e_h = (e1_h + e2_h)/2.0
e1_h = tf.expand_dims(e1_embedd_2, axis=1)
e2_h = tf.expand_dims(e2_embedd_2, axis=1)
input_e1 = tf.concat([self.enc, e1_h, e2_h], axis=1)
print(input_e1.get_shape())
self.self_atten_change = tf.expand_dims(input_e1, -1) # [800 90 300 1]
# self.self_atten_change = tf.expand_dims(self.enc,-1)
self.enc_dense = tf.layers.dense(self.enc,
units=128,
activation=tf.nn.relu)
def true_func_2():
e1_embedd_dense = tf.expand_dims(tf.reduce_mean(
self.enc_dense[0][self.e1_start[0]:self.e1_end[0] + 1],
axis=0),
axis=0)
e2_embedd_dense = tf.expand_dims(tf.reduce_mean(
self.enc_dense[0][self.e2_start[0]:self.e2_end[0] + 1],
axis=0),
axis=0)
print("e1 shape", e1_embedd_dense.shape)
for i in range(1, 32):
e1 = tf.expand_dims(tf.reduce_mean(
self.enc_dense[i][self.e1_start[i]:self.e1_end[i] + 1],
axis=0),
axis=0)
e2 = tf.expand_dims(tf.reduce_mean(
self.enc_dense[i][self.e2_start[i]:self.e2_end[i] + 1],
axis=0),
axis=0)
e1_embedd_dense = tf.concat([e1_embedd_dense, e1], axis=0)
e2_embedd_dense = tf.concat([e2_embedd_dense, e2], axis=0)
print("embed shape:", e1_embedd_dense.shape)
return e1_embedd_dense, e2_embedd_dense
def false_func_2():
e1_embedd_dense = tf.expand_dims(tf.reduce_mean(
self.enc_dense[0][self.e1_start[0]:self.e1_end[0] + 1],
axis=0),
axis=0)
e2_embedd_dense = tf.expand_dims(tf.reduce_mean(
self.enc_dense[0][self.e2_start[0]:self.e2_end[0] + 1],
axis=0),
axis=0)
print("e1 shape", e1_embedd_dense.shape)
for i in range(1, 29):
e1 = tf.expand_dims(tf.reduce_mean(
self.enc_dense[i][self.e1_start[i]:self.e1_end[i] + 1],
axis=0),
axis=0)
e2 = tf.expand_dims(tf.reduce_mean(
self.enc_dense[i][self.e2_start[i]:self.e2_end[i] + 1],
axis=0),
axis=0)
e1_embedd_dense = tf.concat([e1_embedd_dense, e1], axis=0)
e2_embedd_dense = tf.concat([e2_embedd_dense, e2], axis=0)
print("embed shape:", e1_embedd_dense.shape)
return e1_embedd_dense, e2_embedd_dense
e1_embedd_dense_2, e2_embedd_dense_2 = tf.cond(pred=tf.equal(
m, self.batch_size_len),
true_fn=true_func_2,
false_fn=false_func_2)
print("dense:", e1_embedd_dense_2.get_shape())
alpha = attention_7(self.enc_dense, e1_embedd_dense_2,
e2_embedd_dense_2)
self.enc_attention_1 = tf.reduce_sum(tf.multiply(
self.enc_dense, tf.expand_dims(alpha, -1)),
axis=1)
# self.enc_attention_dense = tf.layers.dense(self.enc_attention_1, units=128,
# activation=tf.nn.relu)
# Create a convolution + maxpool layer for each filter size
pooled_outputs = []
for i, filter_size in enumerate(filter_sizes):
with tf.variable_scope("conv-maxpool-%s" % filter_size):
# Convolution Layer
conv = tf.layers.conv2d(
self.self_atten_change,
num_filters, [filter_size, _embedding_size],
activation=tf.nn.relu,
padding="SAME",
strides=(1, _embedding_size),
name="conv") # num_filter=128,filter_size=2,3,4,5
print(conv.get_shape()
) # (?,89,1, 128);(?88,1,128)(?87,1,128)(?86 1 128)
# Maxpooling over the outputs
pooled = tf.nn.max_pool(conv,
ksize=[1, sequence_length + 2, 1, 1],
strides=[1, sequence_length + 2, 1, 1],
padding='SAME',
name="pool")
print(pooled.get_shape()) # (?, 1, 1, 128)
pooled_outputs.append(pooled)
# Combine all the pooled features
num_filters_total = num_filters * len(filter_sizes)
# print(pooled_outputs.get_shape())
print(np.array(pooled_outputs).shape) #（4，）
self.h_pool = tf.concat(pooled_outputs, 3)
# print(self.h_pool.get_shape()) #(?,1,1,512)
self.h_pool_flat = tf.reshape(self.h_pool, [-1, num_filters_total])
self.h_pool_flat_2 = tf.concat(
[self.h_pool_flat, self.enc_attention_1], axis=-1)
print(self.h_pool_flat.get_shape()) #(?,512)
# print(self.h_pool_flat_2.get_shape())
# Add dropout
with tf.variable_scope("dropout"):
self.h_drop = tf.nn.dropout(self.h_pool_flat_2,
self.dropout_keep_prob)
print(self.h_drop.get_shape())
# Final scores and predictions
with tf.variable_scope("output"):
self.logits = tf.layers.dense(self.h_drop,
num_classes,
kernel_initializer=initializer())
print(self.logits.get_shape()) #(?,19)
self.predictions = tf.argmax(self.logits, 1, name="predictions")
# Calculate mean cross-entropy loss
with tf.variable_scope("loss"):
losses = tf.nn.softmax_cross_entropy_with_logits_v2(
logits=self.logits, labels=self.input_y)
self.l2 = tf.add_n(
[tf.nn.l2_loss(v) for v in tf.trainable_variables()])
self.loss = tf.reduce_mean(losses) + l2_reg_lambda * self.l2
# Accuracy
with tf.name_scope("accuracy"):
correct_predictions = tf.equal(self.predictions,
tf.argmax(self.input_y, 1))
self.accuracy = tf.reduce_mean(tf.cast(correct_predictions,
tf.float32),
name="accuracy")
def __init__(self, sequence_length, num_classes,
vocab_size, embedding_size, pos_vocab_size, pos_embedding_size,
hidden_size, num_heads, attention_size,
use_elmo=False, l2_reg_lambda=0.0):
# Placeholders for input, output and dropout
self.input_x = tf.placeholder(tf.int32, shape=[None, sequence_length], name='input_x')
self.input_y = tf.placeholder(tf.float32, shape=[None, num_classes], name='input_y')
self.input_text = tf.placeholder(tf.string, shape=[None, ], name='input_text')
self.input_p1 = tf.placeholder(tf.int32, shape=[None, sequence_length], name='input_p1')
self.input_p2 = tf.placeholder(tf.int32, shape=[None, sequence_length], name='input_p2')
self.emb_dropout_keep_prob = tf.placeholder(tf.float32, name='emb_dropout_keep_prob')
self.rnn_dropout_keep_prob = tf.placeholder(tf.float32, name='rnn_dropout_keep_prob')
self.dropout_keep_prob = tf.placeholder(tf.float32, name='dropout_keep_prob')
# print("e1 shape:", self.input_e1.get_shape()) #(?,)
if use_elmo:
# Contextual Embedding Layer
with tf.variable_scope("elmo-embeddings"):
elmo_model = hub.Module("/home/wangyan/relation_extraction/ELMo", trainable=True)
self.embedded_chars = elmo_model(self.input_text, signature="default", as_dict=True)["elmo"]
print(self.embedded_chars.get_shape())
else:
# Word Embedding Layer
with tf.device('/cpu:0'), tf.variable_scope("word-embeddings"):
self.W_text = tf.Variable(tf.random_uniform([vocab_size, embedding_size], -0.25, 0.25), name="W_text")
self.embedded_chars = tf.nn.embedding_lookup(self.W_text, self.input_x)
# print("shape:",self.embedded_chars.get_shape()) #(?, 90, 300)
# Position Embedding Layer
# with tf.device('/cpu:0'), tf.variable_scope("position-embeddings"):
# self.W_pos = tf.get_variable("W_pos", [pos_vocab_size, pos_embedding_size], initializer=initializer())
# print("embedding_char:", self.embedded_chars.get_shape()[1])
# self.p1 = tf.nn.embedding_lookup(self.W_pos, self.input_p1)[:, :tf.shape(self.embedded_chars)[1]]
# self.p2 = tf.nn.embedding_lookup(self.W_pos, self.input_p2)[:, :tf.shape(self.embedded_chars)[1]]
# # print("p shape:", self.p1.get_shape()) # (?, ? 50)
# Dropout for Word Embedding
with tf.variable_scope('dropout-embeddings'):
self.embedded_chars = tf.nn.dropout(self.embedded_chars, self.emb_dropout_keep_prob)
dim_model = 300
dim_ff = 1200
num_stack = 1
num_heads = 12
# self.embedded_chars = self.text_embedded_chars
##transformer
for i in range(num_stack):
with tf.variable_scope("block-{}".format(i)):
# Multi-head Attention (self attention)
with tf.variable_scope("multihead-attention"):
self.mh = multihead_attention(query=self.embedded_chars, key=self.embedded_chars,
value=self.embedded_chars,
dim_model=dim_model, num_head=num_heads)
# Residual & Layer Normalization
self.mh = tf.contrib.layers.layer_norm(self.embedded_chars + self.mh)
# Position-wise Feed Forward
with tf.variable_scope("position-wise-feed-forward"):
self.ff = feedforward(self.mh, dim_model, dim_ff)
# Residual & Layer Normalization
self.enc = tf.contrib.layers.layer_norm(self.mh + self.ff)
# self.enc_change = tf.layers.conv1d(inputs=self.enc, filters=300, kernel_size=1, activation=tf.nn.relu)
# self.self_attn = tf.layers.dense(self.enc, units=300,
# activation=tf.nn.relu, use_bias=True,
# trainable=True, kernel_initializer=initializer()) # [800 90 300]
print("change:", self.enc.get_shape()) # (?, 90, 300)
# self.self_atten_change = tf.expand_dims(self.enc, -1) # [800 90 300 1]dim_model = 1024
# print("attention shape:", self.self_attn.get_shape) #(?, 90 ,300)
# Bidirectional LSTM
with tf.variable_scope("bi-lstm"):
_fw_cell = tf.nn.rnn_cell.LSTMCell(hidden_size, initializer=initializer())
fw_cell = tf.nn.rnn_cell.DropoutWrapper(_fw_cell, self.rnn_dropout_keep_prob)
_bw_cell = tf.nn.rnn_cell.LSTMCell(hidden_size, initializer=initializer())
bw_cell = tf.nn.rnn_cell.DropoutWrapper(_bw_cell, self.rnn_dropout_keep_prob)
print("sequence_len:",self._length(self.input_x).get_shape())
self.rnn_outputs, _ = tf.nn.bidirectional_dynamic_rnn(cell_fw=fw_cell,
cell_bw=bw_cell,
inputs=self.enc,
sequence_length=self._length(self.input_x),
dtype=tf.float32)
self.rnn_outputs = tf.concat(self.rnn_outputs, axis=-1)
# print("rnn_output_shape:", self.rnn_outputs.get_shape()) #(? 90 600)
# Attention
with tf.variable_scope('attention'):
self.attn, self.alphas = attention_output(self.rnn_outputs)
# print("attn:", self.attn.get_shape()) #(? 600)
# Dropout
with tf.variable_scope('dropout'):
self.h_drop = tf.nn.dropout(self.attn, self.dropout_keep_prob)
# Fully connected layer
with tf.variable_scope('output'):
self.logits = tf.layers.dense(self.h_drop, num_classes, kernel_initializer=initializer())
print("logit shape:", self.attn.get_shape()) #(? ,600)
self.predictions = tf.argmax(self.logits, 1, name="predictions")
print("predit shape:", self.predictions.get_shape()) #(?,)
# Calculate mean cross-entropy loss
with tf.variable_scope("loss"):
losses = tf.nn.softmax_cross_entropy_with_logits_v2(logits=self.logits, labels=self.input_y)
self.l2 = tf.add_n([tf.nn.l2_loss(v) for v in tf.trainable_variables()])
self.loss = tf.reduce_mean(losses) + l2_reg_lambda * self.l2
# Accuracy
with tf.variable_scope("accuracy"):
correct_predictions = tf.equal(self.predictions, tf.argmax(self.input_y, 1))
self.accuracy = tf.reduce_mean(tf.cast(correct_predictions, tf.float32), name="accuracy")
