def forward(self, input, mask=None):
"""
Args:
input (obj: `paddle.Tensor`) of shape (batch, seq_len, input_size): Tensor containing the features of the input sequence.
mask (obj: `paddle.Tensor`, optional, defaults to `None`) of shape (batch, seq_len) :
Tensor is a bool tensor, whose each element identifies whether the input word id is pad token or not.
"""
forward_input, backward_input = paddle.chunk(input, chunks=2, axis=2)
# elementwise-sum forward_x and backward_x
# Shape: (batch_size, max_seq_len, hidden_size)
h = paddle.add_n([forward_input, backward_input])
# Shape: (batch_size, hidden_size, 1)
att_weight = self.att_weight.tile(
repeat_times=(paddle.shape(h)[0], 1, 1))
# Shape: (batch_size, max_seq_len, 1)
att_score = paddle.bmm(paddle.tanh(h), att_weight)
if mask is not None:
# mask, remove the effect of 'PAD'
mask = paddle.cast(mask, dtype='float32')
mask = mask.unsqueeze(axis=-1)
inf_tensor = paddle.full(
shape=mask.shape, dtype='float32', fill_value=-INF)
att_score = paddle.multiply(att_score, mask) + paddle.multiply(
inf_tensor, (1 - mask))
# Shape: (batch_size, max_seq_len, 1)
att_weight = F.softmax(att_score, axis=1)
# Shape: (batch_size, lstm_hidden_size)
reps = paddle.bmm(h.transpose(perm=(0, 2, 1)),
att_weight).squeeze(axis=-1)
reps = paddle.tanh(reps)
return reps, att_weight
def test_simple_pylayer_return_none_with_no_grad(self):
class tanh(PyLayer):
@staticmethod
def forward(ctx, x1, x2, func1, func2=paddle.square):
ctx.func = func2
y1 = func1(x1)
y2 = func1(x2)
ctx.save_for_backward(y1, y2)
return 1, None, y1, y2, ''
@staticmethod
def backward(ctx, dy1, dy2):
y1, y2 = ctx.saved_tensor()
re1 = dy1 * (1 - ctx.func(y1))
re2 = dy2 * (1 - paddle.square(y2))
return re1, None
input1 = paddle.randn([2, 3]).astype("float64")
input2 = input1.detach().clone()
input3 = input1.detach().clone()
input4 = input1.detach().clone()
input1.stop_gradient = False
input2.stop_gradient = False
input3.stop_gradient = True
input4.stop_gradient = True
z = tanh.apply(input1, input3, paddle.tanh, paddle.square)
z = z[2] + z[3]
z.mean().backward()
z2 = paddle.tanh(input2) + paddle.tanh(input4)
z2.mean().backward()
self.assertTrue(
np.max(np.abs((input1.grad.numpy() -
input2.grad.numpy()))) < 1e-10)
def build_program():
main_program = paddle.static.Program()
startup_program = paddle.static.Program()
with paddle.static.program_guard(main_program, startup_program):
with paddle.static.device_guard('cpu'):
data = paddle.ones([4, 64], dtype='float32', name='data')
# data -> [memcpy_h2d] -> data' -> [matmul] -> out ->[add] -> add_out
with paddle.static.device_guard('gpu'):
weight = paddle.randn([64, 64], name='weight') # gpu
matmul_out = paddle.matmul(data, weight, name='matmul_out') # gpus
bias = paddle.ones([4, 64], dtype='float32', name='bias')
add_out = paddle.add(matmul_out, bias, name='add_out')
# add_out -> [memcpy_d2h] -> add_out' -> [sub] -> sub_out -> [tanh] -> tanh_out
with paddle.static.device_guard('cpu'):
sub_out = paddle.subtract(add_out, data, name='sub_out')
tanh_out = paddle.tanh(sub_out, name='tanh_out')
with paddle.static.device_guard('gpu'):
bias_1 = paddle.add(bias, sub_out, name='bias_1')
out_before = paddle.tanh(bias_1, name='out_before')
out_last = paddle.subtract(tanh_out, data, name='out_last')
out = paddle.add(out_before, out_last, name='out')
mean = paddle.mean(out, name='mean_out')
return main_program, startup_program, [mean]
def forward(self, inputs):
#deal with features with different length
#1. padding to same lenght, make a tensor
#2. make a mask tensor with the same shpae with 1
#3. compute output using mask tensor, s.t. output is nothing todo with padding
assert (len(inputs) == self.feature_num
), "Input tensor does not contain {} features".format(
self.feature_num)
att_outs = []
for i in range(len(inputs)):
###1. fc
m = getattr(self, "fc_feature{}".format(i))
output_fc = m(inputs[i][0])
output_fc = paddle.tanh(output_fc)
###2. bi_lstm
m = getattr(self, "bi_lstm{}".format(i))
lstm_out, _ = m(inputs=output_fc, sequence_length=inputs[i][1])
lstm_dropout = self.dropout(lstm_out)
###3. att_fc
m = getattr(self, "att_fc{}".format(i))
lstm_weight = m(lstm_dropout)
###4. softmax replace start, for it's relevant to sum in time step
lstm_exp = paddle.exp(lstm_weight)
lstm_mask = paddle.mean(inputs[i][2], axis=2)
lstm_exp_with_mask = paddle.multiply(x=lstm_exp,
y=lstm_mask,
axis=0)
lstm_sum_with_mask = paddle.sum(lstm_exp_with_mask, axis=1)
exponent = -1
lstm_denominator = paddle.pow(lstm_sum_with_mask, exponent)
lstm_softmax = paddle.multiply(x=lstm_exp,
y=lstm_denominator,
axis=0)
lstm_weight = lstm_softmax
###softmax replace end
lstm_scale = paddle.multiply(x=lstm_dropout, y=lstm_weight, axis=0)
###5. sequence_pool's replace start, for it's relevant to sum in time step
lstm_scale_with_mask = paddle.multiply(x=lstm_scale,
y=lstm_mask,
axis=0)
fea_lens = inputs[i][1]
fea_len = int(fea_lens[0])
lstm_pool = paddle.sum(lstm_scale_with_mask, axis=1)
###sequence_pool's replace end
att_outs.append(lstm_pool)
att_out = paddle.concat(att_outs, axis=1)
fc_out1 = self.fc_out1(att_out)
fc_out1_act = self.relu(fc_out1)
fc_out2 = self.fc_out2(fc_out1_act)
fc_out2_act = paddle.tanh(fc_out2)
fc_logit = self.fc_logit(fc_out2_act)
output = self.sigmoid(fc_logit)
return fc_logit, output
def forward(self, inputs):
outputs1 = self.fc1(inputs)
outputs1 = paddle.tanh(outputs1)
outputs2 = self.fc2(outputs1)
outputs2 = paddle.tanh(outputs2)
outputs_final = self.fc3(outputs2)
outputs_final = F.sigmoid(outputs_final)
return outputs_final
def forward(self, text):
# Shape: (batch_size, num_tokens, embedding_dim)
embedded_text = self.embedder(text)
# Shape: (batch_size, len(ngram_filter_sizes) * num_filter)
encoder_out = paddle.tanh(self.encoder(embedded_text))
# Shape: (batch_size, fc_hidden_size)
fc_out = paddle.tanh(self.fc(encoder_out))
# Shape: (batch_size, num_classes)
logits = self.output_layer(fc_out)
return logits
def forward(self, input_embedding, init_hidden=None, init_cell=None):
cell_array = []
hidden_array = []
for i in range(self._num_layers):
hidden_array.append(init_hidden[i])
cell_array.append(init_cell[i])
res = []
for index in range(self._num_steps):
step_input = input_embedding[:, index, :]
for k in range(self._num_layers):
pre_hidden = hidden_array[k]
pre_cell = cell_array[k]
weight_1 = self.weight_1_arr[k]
bias = self.bias_arr[k]
nn = paddle.concat(x=[step_input, pre_hidden], axis=1)
gate_input = paddle.matmul(x=nn, y=weight_1)
gate_input = paddle.add(x=gate_input, y=bias)
i, j, f, o = paddle.split(x=gate_input,
num_or_sections=4,
axis=-1)
c = pre_cell * paddle.nn.functional.sigmoid(
f) + paddle.nn.functional.sigmoid(i) * paddle.tanh(j)
m = paddle.tanh(c) * paddle.nn.functional.sigmoid(o)
hidden_array[k] = m
cell_array[k] = c
step_input = m
if self._dropout is not None and self._dropout > 0.0:
step_input = paddle.nn.functional.dropout(
step_input,
dropout_prob=self._dropout,
dropout_implementation='upscale_in_train')
res.append(step_input)
real_res = paddle.concat(x=res, axis=1)
real_res = paddle.reshape(real_res,
[-1, self._num_steps, self._hidden_size])
last_hidden = paddle.concat(x=hidden_array, axis=1)
last_hidden = paddle.reshape(
last_hidden, shape=[-1, self._num_layers, self._hidden_size])
last_hidden = paddle.transpose(x=last_hidden, perm=[1, 0, 2])
last_cell = paddle.concat(x=cell_array, axis=1)
last_cell = paddle.reshape(
last_cell, shape=[-1, self._num_layers, self._hidden_size])
last_cell = paddle.transpose(x=last_cell, perm=[1, 0, 2])
return real_res, last_hidden, last_cell
def forward(self, text, seq_len=None):
# Shape: (batch_size, num_tokens, embedding_dim)
embedded_text = self.embedder(text)
# Shape: (batch_size, embedding_dim)
summed = self.bow_encoder(embedded_text)
encoded_text = paddle.tanh(summed)
# Shape: (batch_size, hidden_size)
fc1_out = paddle.tanh(self.fc1(encoded_text))
# Shape: (batch_size, fc_hidden_size)
fc2_out = paddle.tanh(self.fc2(fc1_out))
# Shape: (batch_size, num_classes)
logits = self.output_layer(fc2_out)
return logits
def test_simple_pylayer_single_output(self):
class tanh(PyLayer):
@staticmethod
def forward(ctx, x1, func1, func2=paddle.square):
ctx.func = func2
y1 = func1(x1)
ctx.save_for_backward(y1)
return y1
@staticmethod
def backward(ctx, dy1):
y1, = ctx.saved_tensor()
re1 = dy1 * (1 - ctx.func(y1))
return re1
input1 = paddle.randn([2, 3]).astype("float64")
input2 = input1.detach().clone()
input1.stop_gradient = False
input2.stop_gradient = False
z = tanh.apply(x1=input1, func1=paddle.tanh)
z.mean().backward()
z2 = paddle.tanh(input2)
z2.mean().backward()
self.assertTrue(
np.max(np.abs((input1.grad.numpy() -
input2.grad.numpy()))) < 1e-10)
def forward(self, x, condition):
"""Compute output for a whole folded sequence.
Parameters
----------
x : Tensor [shape=(batch_size, channel, height, width)]
The input.
condition : Tensor [shape=(batch_size, condition_channel, height, width)]
The local condition.
Returns
-------
res : Tensor [shape=(batch_size, channel, height, width)]
The residual output.
skip : Tensor [shape=(batch_size, channel, height, width)]
The skip output.
"""
x_in = x
x = self.conv(x)
x += self.condition_proj(condition)
content, gate = paddle.chunk(x, 2, axis=1)
x = paddle.tanh(content) * F.sigmoid(gate)
x = self.out_proj(x)
res, skip = paddle.chunk(x, 2, axis=1)
res = x_in + res
return res, skip
def forward(self, x):
# NOTE: manually trigger `__iter__` logic.
params = list(self.params.__iter__())
out = paddle.matmul(x, params[0])
out = paddle.add(out, params[1])
out = paddle.tanh(out)
return out
def forward_interpet(self, text, seq_len):
embedded_text = self.embedder(
text) # Shape: (batch_size, num_tokens, embedding_dim)
# text_repr = self.lstm_encoder(embedded_text, sequence_length=seq_len) # Shape: (batch_size, num_tokens, num_directions * hidden)
# encoded_text: tensor[batch, seq_len, num_directions * hidden]
# last_hidden: tensor[2, batch, hiddens]
encoded_text, (last_hidden,
last_cell) = self.lstm_layer(embedded_text,
sequence_length=seq_len)
if self.direction == 'bidirect':
text_repr = paddle.concat(
(last_hidden[-2, :, :], last_hidden[-1, :, :]),
axis=1) # text_repr: tensor[batch, 2 * hidden] 双向
else:
text_repr = last_hidden[
-1, :, :] # text_repr: tensor[1, hidden_size] 单向
fc_out = paddle.tanh(
self.fc(text_repr)) # Shape: (batch_size, fc_hidden_size)
logits = self.output_layer(fc_out) # Shape: (batch_size, num_classes)
probs = self.softmax(logits)
return probs, text_repr, embedded_text
def forward(self, inputs):
text = inputs[0]
pos_tag = inputs[1]
neg_tag = inputs[2]
text_emb = self.text_embedding(text)
text_emb = paddle.reshape(
text_emb, shape=[-1, self.text_len, self.emb_dim])
pos_tag_emb = self.tag_embedding(pos_tag)
pos_tag_emb = paddle.reshape(pos_tag_emb, shape=[-1, self.emb_dim])
neg_tag_emb = self.tag_embedding(neg_tag)
neg_tag_emb = paddle.reshape(
neg_tag_emb, shape=[-1, self.neg_size, self.emb_dim])
conv_1d = self.conv(text_emb)
act = paddle.tanh(conv_1d)
maxpool = paddle.max(act, axis=1)
maxpool = paddle.reshape(maxpool, shape=[-1, self.hid_dim])
text_hid = self.hid_fc(maxpool)
cos_pos = F.cosine_similarity(
pos_tag_emb, text_hid, axis=1).reshape([-1, 1])
# fluid.layers.Print(cos_pos)
neg_tag_emb = paddle.max(neg_tag_emb, axis=1)
neg_tag_emb = paddle.reshape(neg_tag_emb, shape=[-1, self.emb_dim])
cos_neg = F.cosine_similarity(
neg_tag_emb, text_hid, axis=1).reshape([-1, 1])
# fluid.layers.Print(cos_neg)
return cos_pos, cos_neg
def model(self, x, w, bias, opt):
paddle.seed(0)
place = paddle.CPUPlace()
if paddle.device.is_compiled_with_cuda():
place = paddle.CUDAPlace(0)
exe = paddle.static.Executor(place)
main = paddle.static.Program()
startup = paddle.static.Program()
with paddle.static.program_guard(main, startup):
input_x = paddle.static.data('x', x.shape, dtype=x.dtype)
input_x.stop_gradient = False
params_w = paddle.static.create_parameter(shape=w.shape,
dtype=w.dtype,
is_bias=False)
params_bias = paddle.static.create_parameter(shape=bias.shape,
dtype=bias.dtype,
is_bias=True)
y = paddle.tanh(paddle.matmul(input_x, params_w) + params_bias)
loss = paddle.norm(y, p=2)
opt = opt
_, grads = opt.minimize(loss)
if prim_enabled():
prim2orig(main.block(0))
exe.run(startup)
grads = exe.run(main,
feed={
'x': x,
'w': w,
'bias': bias
},
fetch_list=grads)
return grads
def gelu_new(x):
"""
Implementation of the GELU activation function currently in Google BERT repo (identical to OpenAI GPT). Also see
the Gaussian Error Linear Units paper: https://arxiv.org/abs/1606.08415
"""
return 0.5 * x * (1.0 + paddle.tanh(
math.sqrt(2.0 / math.pi) * (x + 0.044715 * paddle.pow(x, 3.0))))
def backward(ctx, dy):
with paddle.set_grad_enabled(True):
temp = ctx.inputs
temp.stop_gradient = False
z = paddle.tanh(temp)
z.backward()
self.assertTrue(temp.grad is not None)
return paddle.to_tensor(temp.grad)
def forward(self, query, title, query_seq_len=None, title_seq_len=None):
# Shape: (batch_size, num_tokens, embedding_dim)
embedded_query = self.embedder(query)
embedded_title = self.embedder(title)
# Shape: (batch_size, embedding_dim)
summed_query = self.bow_encoder(embedded_query)
summed_title = self.bow_encoder(embedded_title)
encoded_query = paddle.tanh(summed_query)
encoded_title = paddle.tanh(summed_title)
# Shape: (batch_size, embedding_dim*2)
contacted = paddle.concat([encoded_query, encoded_title], axis=-1)
# Shape: (batch_size, fc_hidden_size)
fc_out = paddle.tanh(self.fc(contacted))
# Shape: (batch_size, num_classes)
logits = self.output_layer(fc_out)
# probs = F.softmax(logits, axis=-1)
return logits
def forward_interpreter(self,
query,
title,
query_seq_len,
title_seq_len,
noise=None,
i=None,
n_samples=None):
assert query_seq_len is not None and title_seq_len is not None
# Shape: (batch_size, num_tokens, embedding_dim)
query_baseline = paddle.to_tensor([self.pad_token_id] *
query.shape[1]).unsqueeze(0)
title_baseline = paddle.to_tensor([self.pad_token_id] *
title.shape[1]).unsqueeze(0)
embedded_query = self.embedder(query)
embedded_title = self.embedder(title)
embedded_query_baseline = self.embedder(query_baseline)
embedded_title_baseline = self.embedder(title_baseline)
if noise is not None and noise.upper() == 'INTEGRATED':
embedded_query = embedded_query_baseline + i / (n_samples - 1) * (
embedded_query - embedded_query_baseline)
embedded_title = embedded_title_baseline + i / (n_samples - 1) * (
embedded_title - embedded_title_baseline)
# Shape: (batch_size, lstm_hidden_size)
query_repr = self.lstm_encoder(embedded_query,
sequence_length=query_seq_len)
title_repr = self.lstm_encoder(embedded_title,
sequence_length=title_seq_len)
# Shape: (batch_size, 2*lstm_hidden_size)
contacted = paddle.concat([query_repr, title_repr], axis=-1)
# Shape: (batch_size, fc_hidden_size)
fc_out = paddle.tanh(self.fc(contacted))
# Shape: (batch_size, num_classes)
logits = self.output_layer(fc_out)
probs = F.softmax(logits, axis=-1)
q_att = paddle.matmul(fc_out,
embedded_query, transpose_y=True).squeeze(
axis=[1]) # (bsz, query_len)
q_att = F.softmax(q_att, axis=-1)
t_att = paddle.matmul(fc_out,
embedded_title, transpose_y=True).squeeze(
axis=[1]) # (bsz, title_len)
t_att = F.softmax(t_att, axis=-1)
addiational_info = {
'embedded': [embedded_query, embedded_title],
'attention': [q_att, t_att],
}
# return logits, addiational_info
return probs, addiational_info
def forward(self, inputs):
x_0 = inputs.unsqueeze(2) # (bs, in_features, 1)
x_l = x_0
for i in range(self.layer_num):
output_of_experts = []
gating_score_of_experts = []
for expert_id in range(self.num_experts):
# (1) G(x_l)
# compute the gating score by x_l
gating_score_of_experts.append(self.gating[expert_id](
x_l.squeeze(2)))
# (2) E(x_l)
# project the input x_l to $\mathbb{R}^{r}$
v_x = paddle.matmul(self.V_list[i][expert_id].t(),
x_l) # (bs, low_rank, 1)
# nonlinear activation in low rank space
v_x = paddle.tanh(v_x)
v_x = paddle.matmul(self.C_list[i][expert_id], v_x)
v_x = paddle.tanh(v_x)
# project back to $\mathbb{R}^{d}$
uv_x = paddle.matmul(self.U_list[i][expert_id],
v_x) # (bs, in_features, 1)
dot_ = uv_x + self.bias[i]
dot_ = x_0 * dot_ # Hadamard-product
output_of_experts.append(dot_.squeeze(2))
# (3) mixture of low-rank experts
output_of_experts = paddle.stack(
output_of_experts, axis=2) # (bs, in_features, num_experts)
gating_score_of_experts = paddle.stack(
gating_score_of_experts, axis=1) # (bs, num_experts, 1)
moe_out = paddle.matmul(output_of_experts,
F.softmax(gating_score_of_experts, axis=1))
x_l = moe_out + x_l # (bs, in_features, 1)
x_l = x_l.squeeze() # (bs, in_features)
return x_l
def forward(self,
query,
processed_key,
value,
attention_weights_cat,
mask=None):
"""Compute context vector and attention weights.
Parameters
-----------
query : Tensor [shape=(batch_size, d_query)]
The queries.
processed_key : Tensor [shape=(batch_size, time_steps_k, d_attention)]
The keys after linear layer.
value : Tensor [shape=(batch_size, time_steps_k, d_key)]
The values.
attention_weights_cat : Tensor [shape=(batch_size, time_step_k, 2)]
Attention weights concat.
mask : Tensor, optional
The mask. Shape should be (batch_size, times_steps_q, time_steps_k) or broadcastable shape.
Defaults to None.
Returns
----------
attention_context : Tensor [shape=(batch_size, time_steps_q, d_attention)]
The context vector.
attention_weights : Tensor [shape=(batch_size, times_steps_q, time_steps_k)]
The attention weights.
"""
processed_query = self.query_layer(paddle.unsqueeze(query, axis=[1]))
processed_attention_weights = self.location_layer(
self.location_conv(attention_weights_cat))
alignment = self.value(
paddle.tanh(processed_attention_weights + processed_key +
processed_query))
if mask is not None:
alignment = alignment + (1.0 - mask) * -1e9
attention_weights = F.softmax(alignment, axis=1)
attention_context = paddle.matmul(attention_weights,
value,
transpose_x=True)
attention_weights = paddle.squeeze(attention_weights, axis=[-1])
attention_context = paddle.squeeze(attention_context, axis=[1])
return attention_context, attention_weights
def get_action(self, state):
epsilon = paddle.to_tensor(1e-7, dtype='float32')
mean, log_std = self.forward(state)
std = log_std.exp()
normal = Normal(mean, std)
z = normal.sample([1])
action = paddle.tanh(z)
log_prob = normal.log_prob(z) - paddle.log(1 - action.pow(2) + epsilon)
log_prob = log_prob.sum(-1, keepdim=True)
return action, log_prob, z, mean, log_std
def forward(self, prev_hidden, batch_H, char_onehots):
batch_H_proj = self.i2h(batch_H)
prev_hidden_proj = paddle.unsqueeze(self.h2h(prev_hidden), axis=1)
res = paddle.add(batch_H_proj, prev_hidden_proj)
res = paddle.tanh(res)
e = self.score(res)
alpha = F.softmax(e, axis=1)
alpha = paddle.transpose(alpha, [0, 2, 1])
context = paddle.squeeze(paddle.mm(alpha, batch_H), axis=1)
concat_context = paddle.concat([context, char_onehots], 1)
cur_hidden = self.rnn(concat_context, prev_hidden)
return cur_hidden, alpha
def _lstm(self, inputs, hidden, cell, token_idx):
cells = lstm_cell(self.lstm_num_layers, self.hidden_size)
output, new_states = cells.call(inputs, states=([[hidden, cell]]))
logits = paddle.static.nn.fc(new_states[0],
self.range_tables[token_idx])
if self.temperature is not None:
logits = logits / self.temperature
if self.tanh_constant is not None:
logits = self.tanh_constant * paddle.tanh(logits)
return logits, output, new_states
def sample(self, obs):
act_mean, act_log_std = self.model.policy(obs)
normal = Normal(act_mean, act_log_std.exp())
# for reparameterization trick (mean + std*N(0,1))
x_t = normal.sample([1])
action = paddle.tanh(x_t)
log_prob = normal.log_prob(x_t)
# Enforcing Action Bound
log_prob -= paddle.log((1 - action.pow(2)) + 1e-6)
log_prob = paddle.sum(log_prob, axis=-1, keepdim=True)
return action[0], log_prob[0]
def forward(self, text, seq_len):
# Shape: (batch_size, num_tokens, embedding_dim)
embedded_text = self.embedder(text)
# Shape: (batch_size, num_tokens, num_directions*rnn_hidden_size)
# num_directions = 2 if direction is 'bidirect'
# if not, num_directions = 1
text_repr = self.rnn_encoder(embedded_text, sequence_length=seq_len)
# Shape: (batch_size, fc_hidden_size)
fc_out = paddle.tanh(self.fc(text_repr))
# Shape: (batch_size, num_classes)
logits = self.output_layer(fc_out)
return logits
def forward(self, x_1, seq_len_1, x_2=None, seq_len_2=None):
x_embed_1 = self.embedder(x_1)
lstm_out_1, (hidden_1, _) = self.lstm(x_embed_1,
sequence_length=seq_len_1)
out_1 = paddle.concat((hidden_1[-2, :, :], hidden_1[-1, :, :]), axis=1)
if x_2 is not None:
x_embed_2 = self.embedder(x_2)
lstm_out_2, (hidden_2, _) = self.lstm(x_embed_2,
sequence_length=seq_len_2)
out_2 = paddle.concat((hidden_2[-2, :, :], hidden_2[-1, :, :]),
axis=1)
out = paddle.concat(
x=[out_1, out_2, out_1 + out_2,
paddle.abs(out_1 - out_2)],
axis=1)
out = paddle.tanh(self.fc_1(out))
else:
out = paddle.tanh(self.fc(out_1))
logits = self.output_layer(out)
return logits
def _test(self, run_mlu=True):
main_prog = paddle.static.Program()
startup_prog = paddle.static.Program()
main_prog.random_seed = SEED
startup_prog.random_seed = SEED
np.random.seed(SEED)
a_np = np.random.random(size=(32, 32)).astype('float32')
b_np = np.random.random(size=(32, 32)).astype('float32')
label_np = np.random.randint(2, size=(32, 1)).astype('int64')
with paddle.static.program_guard(main_prog, startup_prog):
a = paddle.static.data(name="a", shape=[32, 32], dtype='float32')
b = paddle.static.data(name="b", shape=[32, 32], dtype='float32')
label = paddle.static.data(name="label",
shape=[32, 1],
dtype='int64')
c = paddle.multiply(a, b)
d = paddle.tanh(c)
fc_1 = fluid.layers.fc(input=d, size=128)
prediction = fluid.layers.fc(input=fc_1, size=2, act='softmax')
cost = fluid.layers.cross_entropy(input=prediction, label=label)
loss = fluid.layers.reduce_mean(cost)
sgd = fluid.optimizer.SGD(learning_rate=0.01)
sgd.minimize(loss)
if run_mlu:
place = paddle.MLUPlace(0)
else:
place = paddle.CPUPlace()
exe = paddle.static.Executor(place)
exe.run(startup_prog)
print("Start run on {}".format(place))
for epoch in range(100):
pred_res, loss_res = exe.run(main_prog,
feed={
"a": a_np,
"b": b_np,
"label": label_np
},
fetch_list=[prediction, loss])
if epoch % 10 == 0:
print("Epoch {} | Prediction[0]: {}, Loss: {}".format(
epoch, pred_res[0], loss_res))
return pred_res, loss_res
def get_coord_features(self, points, batchsize, rows, cols):
if self.cpu_mode:
coords = []
for i in range(batchsize):
norm_delimeter = (1.0 if self.use_disks else
self.spatial_scale * self.norm_radius)
coords.append(
self._get_dist_maps(points[i].numpy().astype("float32"),
rows, cols, norm_delimeter))
coords = paddle.to_tensor(np.stack(coords,
axis=0)).astype("float32")
else:
num_points = points.shape[1] // 2
points = points.reshape([-1, points.shape[2]])
points, points_order = paddle.split(points, [2, 1], axis=1)
invalid_points = paddle.max(points, axis=1, keepdim=False) < 0
row_array = paddle.arange(start=0,
end=rows,
step=1,
dtype="float32")
col_array = paddle.arange(start=0,
end=cols,
step=1,
dtype="float32")
coord_rows, coord_cols = paddle.meshgrid(row_array, col_array)
coords = paddle.unsqueeze(paddle.stack([coord_rows, coord_cols],
axis=0),
axis=0).tile([points.shape[0], 1, 1, 1])
add_xy = (points * self.spatial_scale).reshape(
[points.shape[0], points.shape[1], 1, 1])
coords = coords - add_xy
if not self.use_disks:
coords = coords / (self.norm_radius * self.spatial_scale)
coords = coords * coords
coords[:, 0] += coords[:, 1]
coords = coords[:, :1]
invalid_points = invalid_points.numpy()
coords[invalid_points, :, :, :] = 1e6
coords = coords.reshape([-1, num_points, 1, rows, cols])
coords = paddle.min(coords, axis=1)
coords = coords.reshape([-1, 2, rows, cols])
if self.use_disks:
coords = (coords <= (self.norm_radius * self.spatial_scale)**
2).astype("float32")
else:
coords = paddle.tanh(paddle.sqrt(coords) * 2)
return coords
def forward(self, inputs):
pad_input = F.pad2d(inputs, [3, 3, 3, 3], mode="reflect")
y = self.conv0(pad_input)
y = self.conv1(y)
y = self.conv2(y)
for resnet_block in self.resnet_blocks:
y = resnet_block(y)
y = self.deconv0(y)
y = self.deconv1(y)
y = F.pad2d(y, [3, 3, 3, 3], mode="reflect")
y = self.conv3(y)
y = paddle.tanh(y)
return y
def forward(self, text, seq_len):
mask = text != self.padding_idx
embedded_text = self.embedder(text)
# Encode text, shape: (batch, max_seq_len, num_directions * hidden_size)
encoded_text, (last_hidden, last_cell) = self.bilstm(
embedded_text, sequence_length=seq_len)
# Shape: (batch_size, lstm_hidden_size)
hidden, att_weights = self.attention(encoded_text, mask)
# Shape: (batch_size, fc_hidden_size)
fc_out = paddle.tanh(self.fc(hidden))
# Shape: (batch_size, num_classes)
logits = self.output_layer(fc_out)
return logits