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6 changes: 4 additions & 2 deletions code/TFC/augmentations.py
Original file line number Diff line number Diff line change
Expand Up @@ -58,13 +58,15 @@ def DataTransform_FD(sample, config):
return aug_F

def remove_frequency(x, pertub_ratio=0.0):
mask = torch.cuda.FloatTensor(x.shape).uniform_() > pertub_ratio # maskout_ratio are False
# mask = torch.cuda.FloatTensor(x.shape).uniform_() > pertub_ratio # maskout_ratio are False
mask = torch.FloatTensor(x.shape).uniform_() > pertub_ratio # maskout_ratio are False
mask = mask.to(x.device)
return x*mask

def add_frequency(x, pertub_ratio=0.0):

mask = torch.cuda.FloatTensor(x.shape).uniform_() > (1-pertub_ratio) # only pertub_ratio of all values are True
# mask = torch.cuda.FloatTensor(x.shape).uniform_() > (1-pertub_ratio) # only pertub_ratio of all values are True
mask = torch.FloatTensor(x.shape).uniform_() > (1-pertub_ratio) # only pertub_ratio of all values are True
mask = mask.to(x.device)
max_amplitude = x.max()
random_am = torch.rand(mask.shape)*(max_amplitude*0.1)
Expand Down
341 changes: 217 additions & 124 deletions code/TFC/dataloader.py

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386 changes: 193 additions & 193 deletions code/TFC/loss.py

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120 changes: 60 additions & 60 deletions code/TFC/model.py
Original file line number Diff line number Diff line change
@@ -1,60 +1,60 @@
from torch import nn
import torch
from torch.nn import TransformerEncoder, TransformerEncoderLayer
"""Two contrastive encoders"""
class TFC(nn.Module):
def __init__(self, configs):
super(TFC, self).__init__()
encoder_layers_t = TransformerEncoderLayer(configs.TSlength_aligned, dim_feedforward=2*configs.TSlength_aligned, nhead=2, )
self.transformer_encoder_t = TransformerEncoder(encoder_layers_t, 2)
self.projector_t = nn.Sequential(
nn.Linear(configs.TSlength_aligned, 256),
nn.BatchNorm1d(256),
nn.ReLU(),
nn.Linear(256, 128)
)
encoder_layers_f = TransformerEncoderLayer(configs.TSlength_aligned, dim_feedforward=2*configs.TSlength_aligned,nhead=2,)
self.transformer_encoder_f = TransformerEncoder(encoder_layers_f, 2)
self.projector_f = nn.Sequential(
nn.Linear(configs.TSlength_aligned, 256),
nn.BatchNorm1d(256),
nn.ReLU(),
nn.Linear(256, 128)
)
def forward(self, x_in_t, x_in_f):
"""Use Transformer"""
x = self.transformer_encoder_t(x_in_t)
h_time = x.reshape(x.shape[0], -1)
"""Cross-space projector"""
z_time = self.projector_t(h_time)
"""Frequency-based contrastive encoder"""
f = self.transformer_encoder_f(x_in_f)
h_freq = f.reshape(f.shape[0], -1)
"""Cross-space projector"""
z_freq = self.projector_f(h_freq)
return h_time, z_time, h_freq, z_freq
"""Downstream classifier only used in finetuning"""
class target_classifier(nn.Module):
def __init__(self, configs):
super(target_classifier, self).__init__()
self.logits = nn.Linear(2*128, 64)
self.logits_simple = nn.Linear(64, configs.num_classes_target)
def forward(self, emb):
emb_flat = emb.reshape(emb.shape[0], -1)
emb = torch.sigmoid(self.logits(emb_flat))
pred = self.logits_simple(emb)
return pred
from torch import nn
import torch
from torch.nn import TransformerEncoder, TransformerEncoderLayer

"""Two contrastive encoders"""
class TFC(nn.Module):
def __init__(self, configs):
super(TFC, self).__init__()

encoder_layers_t = TransformerEncoderLayer(configs.TSlength_aligned, dim_feedforward=2*configs.TSlength_aligned, nhead=configs.transformer_nhead, )
self.transformer_encoder_t = TransformerEncoder(encoder_layers_t, configs.transformer_num_layers)

self.projector_t = nn.Sequential(
nn.Linear(configs.TSlength_aligned*configs.input_channels, configs.embedding_len*2),
nn.BatchNorm1d(configs.embedding_len*2),
nn.ReLU(),
nn.Linear(configs.embedding_len*2, configs.embedding_len)
)

encoder_layers_f = TransformerEncoderLayer(configs.TSlength_aligned, dim_feedforward=2*configs.TSlength_aligned,nhead=configs.transformer_nhead,)
self.transformer_encoder_f = TransformerEncoder(encoder_layers_f, configs.transformer_num_layers)

self.projector_f = nn.Sequential(
nn.Linear(configs.TSlength_aligned*configs.input_channels, configs.embedding_len*2),
nn.BatchNorm1d(configs.embedding_len*2),
nn.ReLU(),
nn.Linear(configs.embedding_len*2, configs.embedding_len)
)


def forward(self, x_in_t, x_in_f):
"""Use Transformer"""
x = self.transformer_encoder_t(x_in_t)
h_time = x.reshape(x.shape[0], -1)

"""Cross-space projector"""
z_time = self.projector_t(h_time)

"""Frequency-based contrastive encoder"""
f = self.transformer_encoder_f(x_in_f)
h_freq = f.reshape(f.shape[0], -1)

"""Cross-space projector"""
z_freq = self.projector_f(h_freq)

return h_time, z_time, h_freq, z_freq


"""Downstream classifier only used in finetuning"""
class target_classifier(nn.Module):
def __init__(self, configs):
super(target_classifier, self).__init__()
self.logits = nn.Linear(2*128, 64)
self.logits_simple = nn.Linear(64, configs.num_classes_target)

def forward(self, emb):
emb_flat = emb.reshape(emb.shape[0], -1)
emb = torch.sigmoid(self.logits(emb_flat))
pred = self.logits_simple(emb)
return pred
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