def __depthwise_conv_block(input,
pointwise_conv_filters,
alpha,
depth_multiplier=1,
strides=(1, 1),
id=1):
channel_axis = 1 if K.image_data_format() == 'channels_first' else -1
pointwise_conv_filters = int(pointwise_conv_filters * alpha)
x = DepthwiseConvolution2D(kernel_size=(3, 3),
padding='same',
depth_multiplier=depth_multiplier,
strides=strides,
use_bias=False,
name='conv_dw_%d' % id)(input)
x = BatchNormalization(axis=channel_axis, name='conv_dw_%d_bn' % id)(x)
x = Activation(lambda x: relu(x, max_value=6),
name='conv_dw_%d_relu' % id)(x)
x = Convolution2D(pointwise_conv_filters, (1, 1),
padding='same',
use_bias=False,
strides=(1, 1),
name='conv_pw_%d' % id)(x)
x = BatchNormalization(axis=channel_axis, name='conv_pw_%d_bn' % id)(x)
x = Activation(lambda x: relu(x, max_value=6),
name='conv_pw_%d_relu' % id)(x)
return x
def call(self, inputs):
x, y = inputs
x = K.dot(x, self.x_weights) # batch, (pool_k*pool_o)
y = K.dot(y, self.y_weights) # batch, (pool_k*pool_o)
out = self.ewmultiply([x, y]) # batch, (pool_k*pool_o)
out = self.reshape(out) # batch, pool_k, pool_o
out = K.sum(out, axis=2) # batch, pool_o
out = K.sqrt(relu(out)) - K.sqrt(relu(-out)) #Signed Square Root
out = K.l2_normalize(out) # batch, pool_o
return (out)
def step(self, x, states):
ytm, stm = states
# repeat the hidden state to the length of the sequence
_stm = K.repeat(stm, self.timesteps)
# now multiplty the weight matrix with the repeated hidden state
_Wxstm = K.dot(_stm, self.W_a)
# calculate the attention probabilities
# this relates how much other timesteps contributed to this one.
et = K.dot(activations.relu(_Wxstm + self._uxpb),
K.expand_dims(self.V_a))
at = K.exp(et)
at_sum = K.sum(at, axis=1)
at_sum_repeated = K.repeat(at_sum, self.timesteps)
at /= at_sum_repeated # vector of size (batchsize, timesteps, 1)
# calculate the context vector
context = K.squeeze(K.batch_dot(at, self.x_seq, axes=1), axis=1)
# ~~~> calculate new hidden state
# first calculate the "r" gate:
rt = activations.sigmoid(
K.dot(ytm, self.W_r) + K.dot(stm, self.U_r) +
K.dot(context, self.C_r) + self.b_r)
# now calculate the "z" gate
zt = activations.sigmoid(
K.dot(ytm, self.W_z) + K.dot(stm, self.U_z) +
K.dot(context, self.C_z) + self.b_z)
# calculate the proposal hidden state:
s_tp = activations.relu(
K.dot(ytm, self.W_p) + K.dot((rt * stm), self.U_p) +
K.dot(context, self.C_p) + self.b_p)
# new hidden state:
st = (1 - zt) * stm + zt * s_tp
yt = activations.softmax(
K.dot(ytm, self.W_o) + K.dot(stm, self.U_o) +
K.dot(context, self.C_o) + self.b_o)
if self.return_probabilities:
return at, [yt, st]
else:
return yt, [yt, st]
def model_land_mark_detection_inception(input_shape):
x_train_input = Input(input_shape)
x = Conv2D(64, (7, 7), strides=(2, 2), data_format='channels_last')(x_train_input)
x = Activation(activation=lambda x: relu(x, max_value=96))(x)
x = MaxPooling2D(pool_size=3, strides=1, data_format='channels_last')(x)
x = Conv2D(192, (3, 3), strides=(1, 1), data_format='channels_last')(x)
x = Activation(activation=lambda x: relu(x, max_value=96))(x)
x = MaxPooling2D(pool_size=3, strides=1, data_format='channels_last')(x)
dict_c = {'1x1': 64, '3x3_reduce': 96, '3x3': 128, '5x5_reduce': 16, '5x5': 32, 'pool_proj': 32}
x = inception_block(x, name='a', channels=dict_c)
dict_c = {'1x1': 128, '3x3_reduce': 128, '3x3': 192, '5x5_reduce': 32, '5x5': 96, 'pool_proj': 64}
x = inception_block(x, name='b', channels=dict_c)
x = MaxPooling2D(pool_size=3, strides=2, data_format='channels_last')(x)
dict_c = {'1x1': 192, '3x3_reduce': 96, '3x3': 208, '5x5_reduce': 16, '5x5': 48, 'pool_proj': 64}
x = inception_block(x, name='c', channels=dict_c)
dict_c = {'1x1': 160, '3x3_reduce': 112, '3x3': 224, '5x5_reduce': 24, '5x5': 64, 'pool_proj': 64}
x = inception_block(x, name='d', channels=dict_c)
dict_c = {'1x1': 128, '3x3_reduce': 128, '3x3': 256, '5x5_reduce': 24, '5x5': 64, 'pool_proj': 64}
x = inception_block(x, name='e', channels=dict_c)
dict_c = {'1x1': 112, '3x3_reduce': 144, '3x3': 288, '5x5_reduce': 32, '5x5': 64, 'pool_proj': 64}
x = inception_block(x, name='f', channels=dict_c)
dict_c = {'1x1': 256, '3x3_reduce': 160, '3x3': 320, '5x5_reduce': 32, '5x5': 128, 'pool_proj': 128}
x = inception_block(x, name='g', channels=dict_c)
x = MaxPooling2D(pool_size=3, strides=2, data_format='channels_last')(x)
dict_c = {'1x1': 256, '3x3_reduce': 160, '3x3': 320, '5x5_reduce': 32, '5x5': 128, 'pool_proj': 128}
x = inception_block(x, name='h', channels=dict_c)
dict_c = {'1x1': 384, '3x3_reduce': 192, '3x3': 384, '5x5_reduce': 48, '5x5': 128, 'pool_proj': 128}
x = inception_block(x, name='r', channels=dict_c)
x = AveragePooling2D(pool_size=7, strides=1, data_format='channels_last')(x)
x = Flatten()(x)
x = Dense(1024, activation=lambda x: relu(x, max_value=96))(x)
x = Dropout(0.4)(x)
x = Dense(30, activation=lambda x: relu(x, max_value=96))(x)
model = Model(inputs=x_train_input, outputs=x)
return model
def identity_block_2D(self, X, filters, kernel_size, stage, block):
"""
Args:
X: Input data/tensor.
filters: List of 3 ints defining number of filters in each Conv2d layer.
kernel_size: Int defining the kernel_size of the middle Conv2d layer.
stage: Name of stage of blocks in the total network (a descriptor).
block: Name of block within stage (a descriptor).
"""
X_shortcut = X
F1, F2, F3 = filters
ks = (kernel_size, kernel_size)
conv_name = 'Conv2D_Stage_' + str(stage) + '_Block_' + str(block)
BN_name = 'BN2D_Stage_' + str(stage) + '_Block_' + str(block)
# first block
X = Conv2D(filters=F1,
kernel_size=(1, 1),
strides=(1, 1),
padding='valid',
kernel_initializer='glorot_uniform',
name=conv_name + '_a')(X)
X = BatchNormalization(axis=-1, name=BN_name + '_a')(X)
X = relu(X)
# middle block
X = Conv2D(filters=F2,
kernel_size=ks,
strides=(1, 1),
padding='same',
kernel_initializer='glorot_uniform',
name=conv_name + '_b')(X)
X = BatchNormalization(axis=-1, name=BN_name + '_b')(X)
X = relu(X)
# last block
X = Conv2D(filters=F3,
kernel_size=(1, 1),
strides=(1, 1),
padding='valid',
kernel_initializer='glorot_uniform',
name=conv_name + '_c')(X)
X = BatchNormalization(axis=-1, name=BN_name + '_c')(X)
X = Add()([X, X_shortcut])
X = relu(X)
return X
def global_context_block(x):
"""
高维矩阵乘法[n,1,c,hw]*[n,1,hw,1]=[n,1,c,1]
GC_block:global context block
:parameter x:input layers or tensor
"""
bs, h, w, c = x.get_shape().as_list()
input_x = x
input_x = Reshape((-1, c))(input_x) # [N, H*W, C]
input_x = tf.transpose(input_x, perm=[0, 2, 1]) # [N,C,H*W]
input_x = tf.expand_dims(input_x, axis=1)
context_mask = Conv2D(filters=1, kernel_size=(1, 1))(x)
context_mask = Reshape((-1, 1))(context_mask)
context_mask = softmax(context_mask, axis=1) # [N, H*W, 1]
context_mask = tf.transpose(context_mask, [0, 2, 1])
context_mask = tf.expand_dims(context_mask, axis=-1)
context = tf.matmul(input_x, context_mask) # [N,1,c,1]
context = Reshape((1, 1, c))(context)
context_transform = Conv2D(int(c / 8), (1, 1))(context)
context_transform = LayerNormalization()(context_transform)
context_transform = relu(context_transform)
context_transform = Conv2D(c, (1, 1))(context_transform)
x = x + context_transform
return x
def test_relu():
x = K.placeholder(ndim=2)
f = K.function([x], [activations.relu(x)])
test_values = get_standard_values()
result = f([test_values])[0]
assert_allclose(result, test_values, rtol=1e-05)
def gcnet_layer(inputs):
x = inputs
bs, h, w, c = x.get_shape().as_list()
input_x = x
input_x = Reshape((-1, c))(input_x) # [N, H*W, C]
input_x = Lambda(transpose)(input_x) # [N,C,H*W]
input_x = Lambda(expand_dims1)(input_x)
context_mask = Conv2D(filters=1, kernel_size=(1, 1))(x)
context_mask = Reshape((-1, 1))(context_mask)
context_mask = softmax(context_mask, axis=1) # [N, H*W, 1]
context_mask = Lambda(transpose)(context_mask)
context_mask = Lambda(expand_dims2)(context_mask)
context = Lambda(matmul)([input_x, context_mask]) # [N,1,c,1]
context = Reshape((1, 1, c))(context)
context_transform = Conv2D(int(c / 8), (1, 1))(context)
context_transform = LayerNormalization()(context_transform)
context_transform = relu(context_transform)
context_transform = Conv2D(c, (1, 1))(context_transform)
x = add([x, context_transform])
return x
def call(self, x):
assert isinstance(x, list)
signal = x[0]
if self.tree_spacing > 0:
signal = pool_input_kd(x[0], self.tree_spacing, pool_mode='max')
patches_idx = x[1]
conv_kernel = x[2]
# y = sh_invar_conv(signal, x[1], x[2], self.kernel_weights, self.l_max)
patches = tf.gather_nd(signal, patches_idx)
y = tf.einsum('bvprn,bvpc->bvcrn', conv_kernel, patches)
y = tf.einsum('ijrn,bvjrn->bvi', self.kernel_weights, y)
# K.bias_add(y, self.biases)
y = tf.nn.bias_add(y, self.biases)
if self.with_relu:
y = activations.relu(y)
if self.max_pool > 0:
y = pool_input_kd(y, self.max_pool, pool_mode='max')
if self.keep_num_points and self.strides > 0:
y = kd_tree_upsample(y, self.strides + self.max_pool)
return y
def _inverted_res_block(inputs,
expansion,
stride,
alpha,
filters,
block_id,
skip_connection,
rate=1):
in_channels = inputs._keras_shape[-1]
pointwise_conv_filters = int(filters * alpha)
pointwise_filters = _make_divisible(pointwise_conv_filters, 8)
x = inputs
prefix = 'expanded_conv_{}_'.format(block_id)
if block_id:
# Expand
x = Conv2D(expansion * in_channels,
kernel_size=1,
padding='same',
use_bias=False,
activation=None,
name=prefix + 'expand')(x)
x = BatchNormalization(epsilon=1e-3,
momentum=0.999,
name=prefix + 'expand_BN')(x)
x = Activation(relu6, name=prefix + 'expand_relu')(x)
else:
prefix = 'expanded_conv_'
# Depthwise
x = DepthwiseConv2D(kernel_size=3,
strides=stride,
activation=None,
use_bias=False,
padding='same',
dilation_rate=(rate, rate),
name=prefix + 'depthwise')(x)
x = BatchNormalization(epsilon=1e-3,
momentum=0.999,
name=prefix + 'depthwise_BN')(x)
# x = Activation(relu(x, max_value=6.), name=prefix + 'depthwise_relu')(x)
x = Lambda(lambda x: relu(x, max_value=6.),
name=prefix + 'depthwise_relu')(x)
x = Conv2D(pointwise_filters,
kernel_size=1,
padding='same',
use_bias=False,
activation=None,
name=prefix + 'project')(x)
x = BatchNormalization(epsilon=1e-3,
momentum=0.999,
name=prefix + 'project_BN')(x)
if skip_connection:
return Add(name=prefix + 'add')([inputs, x])
# if in_channels == pointwise_filters and stride == 1:
# return Add(name='res_connect_' + str(block_id))([inputs, x])
return x
def call(self, x, mask=None):
h = Activation.relu(K.dot(
x, self.W)) # size (batch, seq_len, phone_len, h_dim)
h = K.dot(h, self.A) # size (batch, seq_len, phone_len, num_heads)
att = K.permute_dimensions(h, (0, 1, 3, 2))
att = self.softmax(att)
att = K.permute_dimensions(att, (0, 1, 3, 2))
return att
def _create_critic_model(self, model_name, hidden, lr):
state_input = Input(shape=[self.__state_size], name='state_inputs')
action_input = Input(
shape=[self.__action_size + self.__action_param_size],
name='action_inputs')
input_layer = concatenate([state_input, action_input],
name='input_layer')
layer_size = hidden[0]
layer = Dense(layer_size,
activation='linear',
name='dense' + str(layer_size) + '_layer')(input_layer)
layer = Activation(lambda x: relu(x, alpha=0.01),
name='activation_' + str(layer_size))(layer)
layers = iter(hidden)
next(layers)
for layer_size in layers:
layer = Dense(layer_size,
activation='linear',
name='dense' + str(layer_size) + '_layer')(layer)
layer = Activation(lambda x: relu(x, alpha=0.01),
name='activation_' + str(layer_size))(layer)
output_layer = Dense(1, activation='linear',
name='q_values_layer')(layer)
model = Model(inputs=[state_input, action_input],
outputs=output_layer,
name=model_name)
#model = multi_gpu_model(model, gpus=3)
model.compile(loss='mse',
optimizer=Adam(lr=lr,
beta_1=FLAGS.momentum,
beta_2=FLAGS.momentum2,
clipnorm=FLAGS.clip_grad,
decay=0.0,
epsilon=0.00000001))
logging.debug(model_name + ' model:')
logging.debug(model.summary())
return model, state_input, action_input
def f(x):
x = Lambda(relu(x))
convLayer = Conv1D(
filter_count,
kernel_size,
kernel_initializer=RandomNormal(mean=0.0, stddev=0.001),
kernel_regularizer=keras.regularizers.l2(l2_reg_convo))(x)
return convLayer
def test_relu():
x = K.placeholder(ndim=2)
f = K.function([x], [activations.relu(x)])
test_values = get_standard_values()
result = f([test_values])[0]
assert_allclose(result, test_values, rtol=1e-05)
# Test max_value
test_values = np.array([[0.5, 1.5]], dtype=K.floatx())
f = K.function([x], [activations.relu(x, max_value=1.)])
result = f([test_values])[0]
assert np.max(result) <= 1.
# Test max_value == 6.
test_values = np.array([[0.5, 6.]], dtype=K.floatx())
f = K.function([x], [activations.relu(x, max_value=1.)])
result = f([test_values])[0]
assert np.max(result) <= 6.
def testRelu(): # testing rectified linear units
x = K.placeholder(ndim=2)
f = K.function([x], [activations.relu(x)])
testValues = getStdValues()
result = f([testValues])[0]
assert_allclose(result, testValues, rtol=1e-05)
# testing max_value
testValues = np.array([[0.5, 1.5]], dtype=K.floatx())
f = K.function([x], [activations.relu(x, max_value=1.)])
result = f([testValues])[0]
assert np.max(result) <= 1.
# testing max_value == 6.
testValues = np.array([[0.5, 6.]], dtype=K.floatx())
f = K.function([x], [activations.relu(x, max_value=1.)])
result = f([testValues])[0]
assert np.max(result) <= 6.
def test_relu():
x = K.placeholder(ndim=2)
f = K.function([x], [activations.relu(x)])
test_values = get_standard_values()
result = f([test_values])[0]
assert_allclose(result, test_values, rtol=1e-05)
# Test max_value
test_values = np.array([[0.5, 1.5]], dtype=K.floatx())
f = K.function([x], [activations.relu(x, max_value=1.)])
result = f([test_values])[0]
assert np.max(result) <= 1.
# Test max_value == 6.
test_values = np.array([[0.5, 6.]], dtype=K.floatx())
f = K.function([x], [activations.relu(x, max_value=1.)])
result = f([test_values])[0]
assert np.max(result) <= 6.
def inverted_res_block(self,
inputs,
expansion,
stride,
alpha,
filters,
block_id,
skip_connection,
rate=1,
eps=1e-3):
in_channels = inputs._keras_shape[-1]
pointwise_conv_filters = int(filters * alpha)
pointwise_filters = make_divisible(pointwise_conv_filters, 8)
x = inputs
if block_id:
# Expand
x = Conv2D(expansion * in_channels,
kernel_size=1,
padding='same',
use_bias=False,
activation=None)(x)
x = BatchNormalization(epsilon=1e-3, momentum=0.999)(x)
x = Lambda(lambda x: relu(x, max_value=6.))(x)
# Depthwise
x = DepthwiseConv2D(kernel_size=3,
strides=stride,
activation=None,
use_bias=False,
padding='same',
dilation_rate=(rate, rate))(x)
x = BatchNormalization(epsilon=1e-3, momentum=0.999)(x)
x = Lambda(lambda x: relu(x, max_value=6.))(x)
x = Conv2D(pointwise_filters,
kernel_size=1,
padding='same',
use_bias=False,
activation=None)(x)
x = BatchNormalization(epsilon=1e-3, momentum=0.999)(x)
if skip_connection:
return Add()([inputs, x])
return x
def call(self, x):
assert isinstance(x, list)
g, x = x
x_ = Conv2D(self.output_dim, (1, 1))(x)
x_ = MaxPooling2D((2, 2))(x_)
g_ = Conv2D(self.output_dim, (1, 1))(g)
g_ = relu(x_ + g_)
g_ = Conv2D(1, (1, 1), activation='sigmoid')(g_)
a = UpSampling2D((2, 2), interpolation='bilinear')(g_)
return a
def call(self, input, mask=None):
prev_values = input[0]
prev_prev_values = input[1]
current_values = input[2]
s_input = K.concatenate(
[prev_values, prev_prev_values, current_values], axis=1)
s = relu(K.dot(s_input, self.W_S1) + self.b_S1)
policy = K.exp(K.dot(s, self.W_S2) + self.b_S2)
return policy
def call(self, inputs):
X = inputs[0] # Node features (N x F)
A = inputs[1] # Adjacency matrix (N x N)
outputs = []
for head in range(self.attn_heads):
kernel = self.kernels[head] # W in the paper (F x F')
attention_kernel = self.attn_kernels[
head] # Attention kernel a in the paper (2F' x 1)
# Compute inputs to attention network
features = K.dot(X, kernel) # (N x F')
# Compute feature combinations
# Note: [[a_1], [a_2]]^T [[Wh_i], [Wh_2]] = [a_1]^T [Wh_i] + [a_2]^T [Wh_j]
attn_for_self = K.dot(
features, attention_kernel[0]) # (N x 1), [a_1]^T [Wh_i]
attn_for_neighs = K.dot(
features, attention_kernel[1]) # (N x 1), [a_2]^T [Wh_j]
# Attention head a(Wh_i, Wh_j) = a^T[[Wh_i], [Wh_j]]
dense = attn_for_self + K.transpose(
attn_for_neighs) # (N x N) via broadcasting
# Add nonlinearty
dense = activations.relu(dense, alpha=0.2)
# Mask values before activation (Vaswani et al., 2017)
mask = -10e9 * (1.0 - A)
dense += mask
# Apply softmax to get attention coefficients
dense = K.softmax(dense) # (N x N)
# Apply dropout to features and attention coefficients
dropout_attn = Dropout(self.dropout_rate)(dense) # (N x N)
dropout_feat = Dropout(self.dropout_rate)(features) # (N x F')
# Linear combination with neighbors' features
node_features = K.dot(dropout_attn, dropout_feat) # (N x F')
if self.use_bias:
node_features = K.bias_add(node_features, self.biases[head])
# Add output of attention head to final output
outputs.append(node_features)
# Aggregate the heads' output according to the reduction method
if self.attn_heads_reduction == 'concat':
output = K.concatenate(outputs) # (N x KF')
else:
output = K.mean(K.stack(outputs), axis=0) # (N x F')
output = self.activation(output)
return output
def call(self, x):
output = K.dot(x, self.kernel)
if self.use_bias:
output = K.bias_add(output, self.bias, data_format="channels_last")
if self.activation == 'relu':
output = activations.relu(output)
elif self.activation == 'sigmoid':
output = activations.sigmoid(output)
return output
def test_relu(self):
x = backend.placeholder(ndim=2)
f = backend.function([x], [activations.relu(x)])
positive_values = np.random.random((2, 5))
result = f([positive_values])[0]
self.assertAllClose(result, positive_values, rtol=1e-05)
negative_values = np.random.uniform(-1, 0, (2, 5))
result = f([negative_values])[0]
expected = np.zeros((2, 5))
self.assertAllClose(result, expected, rtol=1e-05)
def get_initial_state(self, inputs):
# apply the matrix on the first time step to get the initial s0.
s0 = activations.relu(K.dot(inputs[:, 0], self.W_s)) #relu
# from keras.layers.recurrent to initialize a vector of (batchsize,
# output_dim)
y0 = K.zeros_like(inputs) # (samples, timesteps, input_dims)
y0 = K.sum(y0, axis=(1, 2)) # (samples, )
y0 = K.expand_dims(y0) # (samples, 1)
y0 = K.tile(y0, [1, self.output_dim])
return [y0, s0]
def build_residual_bn_api(num_channels, inception_input, inception_num):
conv1 = Conv1D(num_channels,
kernel_size=2,
padding='same',
name=f'res_{inception_num}_x1_conv1d')
bn1 = BatchNormalization()
conv2 = Conv1D(num_channels,
kernel_size=2,
padding='same',
name=f'res_{inception_num}_x2_conv1d')
bn2 = BatchNormalization()
x2 = conv1(inception_input)
x2 = bn1(x2)
x2 = activations.relu(x2)
x2 = conv2(x2)
x2 = bn2(x2)
conv3 = layers.Conv1D(num_channels,
kernel_size=1,
name=f'res_{inception_num}_x3_conv1d')
x3 = conv3(inception_input)
return activations.relu(x2 + x3)
def calc_action(self, values):
# Вычисляем действие, которое надо выполнить
s_input = K.concatenate([
values['stack_current'][:, self.hidden_dim:],
values['stack_prev'][:, self.hidden_dim:],
values['input_current'][:, self.hidden_dim:]
],
axis=1)
s = relu(K.dot(s_input, self.W_S1) + self.b_S1)
policy = K.exp(K.dot(s, self.W_S2) + self.b_S2)
action = TS.switch(TS.le(policy[:, 0], policy[:, 1]), 1, 0)
return action, policy
def mae_mse_combined_loss(y_true, y_pred):
y_true_myo = relu(y_true - 1.0 / 3.0) + 1.0 / 3.0
y_pred_myo = relu(y_pred - 1.0 / 3.0) + 1.0 / 3.0
y_true_myi = relu(y_true - 2.0 / 3.0) + 2.0 / 3.0
y_pred_myi = relu(y_pred - 2.0 / 3.0) + 2.0 / 3.0
# myo_error = mean_squared_error(y_true_myo,y_pred_myo)
# myi_error = mean_absolute_error(y_true_myi,y_pred_myi)
loss_types = loss_type.split('+')
if loss_types[0] == 'mse':
loss1 = mean_squared_error(y_true_myo, y_pred_myo)
elif loss_types[0] == 'mae':
loss1 = mean_absolute_error(y_true_myo, y_pred_myo)
if loss_types[1] == 'mse':
loss2 = mean_squared_error(y_true_myi, y_pred_myi)
elif loss_types[1] == 'mae':
loss2 = mean_absolute_error(y_true_myi, y_pred_myi)
return (loss1 + loss2 * infarction_weight) / restrict_chn
def build_model():
model = models.Sequential()
model.add(
LSTM(100, activation=activations.relu(), input_shape=(timeSteps, 1)))
model.add(Dropout(1))
#model.add(layers.Dense(20, activation='relu'))
model.add(layers.Dense(1, activation=activations.linear()))
print("made it2")
model.compile(optimizer=tf.keras.optimizers.SGD(learning_rate=0.001),
loss=tf.keras.losses.mse,
metrics=['acc'])
return model
def test_relu():
'''
Relu implementation doesn't depend on the value being
a theano variable. Testing ints, floats and theano tensors.
'''
x = K.placeholder(ndim=2)
f = K.function([x], [activations.relu(x)])
test_values = get_standard_values()
result = f([test_values])[0]
# because no negatives in test values
assert_allclose(result, test_values, rtol=1e-05)
def test_relu():
'''
Relu implementation doesn't depend on the value being
a theano variable. Testing ints, floats and theano tensors.
'''
x = K.placeholder(ndim=2)
f = K.function([x], [activations.relu(x)])
test_values = get_standard_values()
result = f([test_values])[0]
# because no negatives in test values
assert_allclose(result, test_values, rtol=1e-05)
def custom_layer_model_stacked_B(input_shape, n_filters, use_bias):
# test my Keras layer
X_input = Input(shape=input_shape, name='input_layer')
E2E1 = EdgeToEdge(n_filters[0], use_bias[0])(X_input)
E2E2 = relu(E2E1)
E2E2 = EdgeToEdge(n_filters[1], use_bias[1])(E2E1)
E2N = EdgeToNode(n_filters[2], use_bias[2])(E2E2)
N2G = NodeToGraph(n_filters[3], use_bias[3])(E2N)
model = Model(inputs = X_input, outputs= N2G)
#model = Model(inputs = X_input, outputs= E2E2)
return model
def get_unet(arg1, trainable=True):
inputs = Input(shape=(None, None, 3))
conv1 = Conv2D(3, (1, 1),
kernel_initializer='random_normal',
activation='relu',
trainable=trainable)(inputs)
conv2 = Conv2D(3, (3, 3),
kernel_initializer='random_normal',
activation='relu',
padding='same',
trainable=trainable)(conv1)
concat1 = concatenate([conv1, conv2], axis=-1)
conv3 = Conv2D(3, (5, 5),
activation='relu',
kernel_initializer='truncated_normal',
padding='same',
trainable=trainable)(concat1)
concat2 = concatenate([conv2, conv3], axis=-1)
conv4 = Conv2D(3, (7, 7),
activation='relu',
kernel_initializer='random_normal',
padding='same',
trainable=trainable)(concat2)
concat3 = concatenate([conv1, conv2, conv3, conv4], axis=-1)
K = Conv2D(3, (3, 3),
activation='relu',
kernel_initializer='truncated_normal',
padding='same',
trainable=True)(concat3)
print(inputs.shape, K.shape)
product = keras.layers.Multiply()([K, inputs])
sum1 = keras.layers.Subtract()([product, K])
sum2 = Lambda(lambda x: 1 + x)(sum1)
#sum2 = keras.layers.Add()([sum1, ones_tensor])
out_layer = Lambda(lambda x: relu(x))(sum2)
##out_layer = relu(sum2)#
if arg1 == 1:
model = Model(inputs=inputs, outputs=out_layer)
else:
model = Model(inputs=inputs, outputs=conv1)
return model
def __conv_block(input, filters, alpha, kernel=(3, 3), strides=(1, 1)):
channel_axis = 1 if K.image_data_format() == 'channels_first' else -1
filters = int(filters * alpha)
x = Convolution2D(filters,
kernel,
padding='same',
use_bias=False,
strides=strides,
name='conv1')(input)
x = BatchNormalization(axis=channel_axis, name='conv1_bn')(x)
x = Activation(lambda x: relu(x, max_value=6), name='conv1_relu')(x)
return x
def clipped_relu(x):
return relu(x, max_value=20)
def _add_model(self):
nodes = self.nodes
config = self.model_config['PHM']
p = config['dropout_p']
mlp_l2 = config['l2']
D = config['mlp_output_dim']
activation = lambda x: relu(x, alpha=config['leaky_alpha'])
# SENTENCE LEVEL
# answer plus question
nodes['question_encoding_repeated'] = RepeatVector(self.answer_size)(nodes['question_encoding'])
nodes['answer_plus_question'] = merge([nodes['answer_encoding'], nodes['question_encoding_repeated']],
mode='sum')
# story mlp and dropout
ninputs, noutputs = ['story_encoding1'], ['story_encoding_mlp']
for ngram in config['ngram_inputs']:
ninputs.append('story_encoding1_%sgram' % ngram)
noutputs.append('story_encoding_mlp_%sgram' % ngram)
story_encoding_mlp = NTimeDistributed(Dense(D, init="identity", activation=activation,
W_regularizer=l2(mlp_l2),
trainable=config['trainable_story_encoding_mlp']))
for input, output in zip(ninputs, noutputs):
nodes[output] = story_encoding_mlp(self._get_node(input))
qa_encoding_mlp = NTimeDistributed(Dense(D, init="identity", activation=activation,
W_regularizer=l2(mlp_l2),
trainable=config['trainable_answer_plus_question_mlp']))
nodes['answer_plus_question_mlp'] = qa_encoding_mlp(nodes['answer_plus_question'])
nodes['story_encoding_mlp_dropout'] = Dropout(p)(nodes['story_encoding_mlp'])
nodes['answer_plus_question_mlp_dropout'] = Dropout(p)(nodes['answer_plus_question_mlp'])
# norm
unit_layer = UnitNormalization()
nodes['story_encoding_mlp_dropout_norm'] = unit_layer(nodes['story_encoding_mlp_dropout'])
nodes['answer_plus_question_norm'] = unit_layer(nodes['answer_plus_question_mlp_dropout'])
# cosine
nodes['story_dot_answer'] = merge([nodes['story_encoding_mlp_dropout_norm'],
nodes['answer_plus_question_norm']],
mode='dot', dot_axes=[2, 2])
# WORD LEVEL
# story mlps for word score and distance score
trainable_word_mlp = self.model_config['PHM']['trainable_word_mlp']
if trainable_word_mlp:
story_word_dense = NTimeDistributed(
Dense(D, init="identity", activation=activation, W_regularizer=l2(mlp_l2),
trainable=trainable_word_mlp), first_n=3)
# q mlps for word and distance scores
q_or_a_word_dense = NTimeDistributed(
Dense(D, init="identity", activation=activation, W_regularizer=l2(mlp_l2),
trainable=trainable_word_mlp), first_n=3)
else:
linear_activation = Activation('linear')
story_word_dense = linear_activation
q_or_a_word_dense = linear_activation
ninputs, noutputs = [], []
tpls = [(True, 'story_word_embedding1', 'story_word_mlp'),
('use_slide_window_inside_sentence', 'reordered_story_word_embedding', 'reordered_story_word_mlp'),
('use_slide_window_word', 'story_attentive_word_embedding', 'story_attentive_word_embedding_mlp'),
('use_slide_window_reordered_word', 'reordered_story_attentive_word_embedding', 'reordered_story_attentive_word_embedding_mlp')
]
for tpl in tpls:
a, b, c = tpl
if a is True or config[a]:
ninputs.append(b)
noutputs.append(c)
if b in ['reordered_story_word_embedding', 'story_word_embedding1']:
for ngram in config['ngram_inputs']:
ninputs.append('%s_%sgram' % (b, ngram))
noutputs.append('%s_%sgram' % (c, ngram))
for input, output in zip(ninputs, noutputs):
nodes[output] = story_word_dense(self._get_node(input))
inputs = ['question_word_embedding', 'answer_word_embedding', 'qa_word_embedding']
outputs = ['question_word_mlp', 'answer_word_mlp', 'qa_word_mlp']
for input, output in zip(inputs, outputs):
nodes[output] = q_or_a_word_dense(self._get_node(input))
# SIMILARITY MATRICES
# first for word scores
# cosine similarity matrix based on sentence and q
nodes['sim_matrix_q'] = WordByWordMatrix(is_q=True)([nodes['story_word_mlp'], nodes['question_word_mlp']])
# cosine similarity matrix based on sentence and a
nodes['sim_matrix_a'] = WordByWordMatrix()([nodes['story_word_mlp'], nodes['answer_word_mlp']])
# WORD-BY-WORD SCORES
# q
nodes['s_q_wbw_score'] = WordByWordScores(trainable=False, is_q=True, alpha=1., threshold=0.15,
wordbyword_merge_type=config['wordbyword_merge_type'],
)([nodes['sim_matrix_q'], nodes['__w_question_wbw']])
# a
nodes['s_a_wbw_score'] = WordByWordScores(trainable=False, alpha=1., threshold=0.15,
wordbyword_merge_type=config['wordbyword_merge_type'], )(
[nodes['sim_matrix_a'], nodes['__w_answer_wbw']])
# mean
nodes['story_dot_answer_words'] = GeneralizedMean(mean_type=config['mean_type'],
trainable=config['trainable_story_dot_answer_words']) \
([nodes['s_q_wbw_score'], nodes['s_a_wbw_score']])
# SLIDING WINDOW INSIDE SENTENCE
if config['use_slide_window_inside_sentence']:
# q+a mlp for word score
# construct cosine similarity matrix based on sentence and qa, for word score
_inputs = [nodes['reordered_story_word_mlp'], nodes['qa_word_mlp']]
nodes['wordbyword_slide_sum_within_sentence'] = \
WordByWordSlideSumInsideSentence(len(_inputs),
window_size=config['window_size_word_inside'],
alpha=config['alpha_slide_window_word_inside'],
use_gaussian_window=config['use_gaussian_window_word_inside'],
gaussian_std=config['gaussian_sd_word_inside'],
trainable=config['trainable_slide_window_word_inside'])(_inputs)
# COMBINE LEVELS
# sum word-based and sentence-based similarity scores
inputs = ['story_dot_answer_words', 'story_dot_answer']
if config['use_slide_window_sentence']:
inputs.append('story_dot_answer_slide')
nodes["story_dot_answer_slide"] = SlideSum(alpha=config['alpha_slide_window'],
use_gaussian_window=config['use_gaussian_window'],
trainable=config['trainable_slide_window'])(
nodes['story_dot_answer'])
if config['use_slide_window_inside_sentence']:
inputs.append('wordbyword_slide_sum_within_sentence')
if self.model_config['PHM']['use_depend_score']:
# SENTENCE-QA DEPENDENCY LEVEL
inputs.append('lcc_score_matrix')
nodes['lcc_score_matrix'] = DependencyDistanceScore(config['alpha_depend_score'])(
self._get_node('input_dep'))
# sum scores from different component of the model on sentence level.
# sentence level score merge
layers_s_input = [nodes[x] for x in inputs]
weights_s = [1.] * len(layers_s_input)
nodes['word_plus_sent_sim'] = Combination(len(layers_s_input), input_dim=3, weights=weights_s,
combination_type=config['sentence_ensemble'],
trainable=config['trainable_sentence_ensemble'])(layers_s_input)
# extract max over sentences
nodes['story_dot_answer_max'] = TimeDistributedMerge(mode='max', axis=1)(nodes['word_plus_sent_sim'])
# word sliding window
word_sliding_window_output = ['story_dot_answer_max']
if config['use_slide_window_word']:
# q+a mlp for word score
# construct cosine similarity matrix based on sentence and qa, for word score
temp_inputs = [nodes['story_attentive_word_embedding_mlp'], nodes['qa_word_mlp']]
if config['use_qa_idf']:
temp_inputs.append(nodes['__w_question_answer'])
nodes['wordbyword_slide_sum'] = WordByWordSlideSum(len(temp_inputs),
window_size=config['window_size_word'],
alpha=config['alpha_slide_window_word'],
use_gaussian_window=config['use_gaussian_window_word'],
gaussian_std=config['gaussian_sd_word'],
trainable=config['trainable_slide_window_word'])(
temp_inputs)
word_sliding_window_output.append('wordbyword_slide_sum')
if config['use_slide_window_reordered_word']:
# q+a mlp for word score
# construct cosine similarity matrix based on sentence and qa, for word score
temp_inputs = [nodes['reordered_story_attentive_word_embedding_mlp'], nodes['qa_word_mlp']]
if config['use_qa_idf']:
temp_inputs.append(nodes['__w_question_answer'])
nodes['reordered_wordbyword_slide_sum'] = WordByWordSlideSum(len(temp_inputs),
window_size=config[
'window_size_reordered_word'],
alpha=config[
'alpha_slide_window_reordered_word'],
use_gaussian_window=config[
'use_gaussian_window_reordered_word'],
gaussian_std=config[
'gaussian_sd_reordered_word'],
trainable=config[
'trainable_slide_window_reordered_word'])(
temp_inputs
)
word_sliding_window_output.append('reordered_wordbyword_slide_sum')
# Extract top_n sentence for each answer
if config['top_n_wordbyword']:
layers_name = ['word_plus_sent_sim', 'story_word_embedding1', 'qa_word_embedding', '__w_question_answer']
layers = [nodes[x] for x in layers_name]
top_n_name = 'top_n_wordbyword'
nodes[top_n_name] = TopNWordByWord(top_n=config['top_n'], nodes=nodes, use_sum=config['top_n_use_sum'],
trainable=True)(layers)
word_sliding_window_output.append(top_n_name)
ngram_output = [self._add_ngram_network(ngram, story_encoding_mlp) for ngram in config['ngram_inputs']]
# final score merge
layers_input = [nodes[x] for x in word_sliding_window_output + ngram_output]
weights = [1.] * len(layers_input)
for i in range(len(ngram_output)):
weights[-i - 1] = 1.
"""
# also aggregate scores that were already aggregated on sentence level.
sentence_level_weight = 0.1
for layer_name in sentence_level_merge_layers:
layer_max = layer_name + "_max"
if layer_max not in nodes:
add_node(TimeDistributedMergeEnhanced(mode='max'), layer_max, input=layer_name)
layers_input.append(nodes[layer_max])
weights.append(sentence_level_weight)"""
nodes['story_dot_answer_combined_max'] = Combination(len(layers_input), weights=weights,
combination_type=config['answer_ensemble'],
trainable=config['trainable_answer_ensemble'])(
layers_input)
# apply not-switch
input_mul = self._get_node('input_negation_questions')
nodes['story_dot_answer_max_switch'] = merge([nodes['story_dot_answer_combined_max'], input_mul], mode='mul')
activation_final = Activation('linear', name='y_hat') \
if self.model_config['optimizer']['loss'] == 'ranking_loss' else Activation(
'softmax', name='y_hat')
prediction = activation_final(nodes['story_dot_answer_max_switch'])
inputs = self.inputs_nodes.values()
model = Model(input=inputs, output=prediction)
optimizer = self._get_optimizer()
model.compile(loss=self._get_loss_dict(), optimizer=optimizer, metrics={'y_hat': 'accuracy'})
self.graph = model
