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neuralnet.py
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Thu, May 2, 09:20

neuralnet.py
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import numpy as np
import torch
from torch import nn, optim
from torch import distributions
from torch.utils.data import DataLoader
from torch.autograd import Variable
import os
from torch.nn import functional as F
class NeuralNet(object):
def __init__(self, device, ngpu, dropout_rate,learning_rate=1e-3):
self.device, self.ngpu = device, ngpu
self.learning_rate = learning_rate
self.dropout_rate = dropout_rate
self.encoder = Encoder(dropout_rate,ngpu).to(self.device)
self.decoder = Decoder(dropout_rate,ngpu).to(self.device)
self.discriminator = Discriminator(dropout_rate,ngpu).to(self.device)
self.models = [self.encoder, self.decoder, self.discriminator]
for idx_m, model in enumerate(self.models):
if(self.device.type == 'cuda') and (self.models[idx_m].ngpu > 0):
self.models[idx_m] = nn.DataParallel(self.models[idx_m], list(range(self.models[idx_m].ngpu)))
self.num_params = 0
for idx_m, model in enumerate(self.models):
for p in model.parameters():
self.num_params += p.numel()
print(model)
print("The number of parameters: %d" %(self.num_params))
self.params = None
for idx_m, model in enumerate(self.models):
if(self.params is None):
self.params = list(model.parameters())
else:
self.params = self.params + list(model.parameters())
self.optimizer = optim.Adam(self.params, lr=self.learning_rate)
#%%
class Encoder(nn.Module):
def __init__(self,dropout_rate,ngpu):
super(Encoder, self).__init__()
self.dropout_rate = dropout_rate
self.ngpu = ngpu
#input 500
self.conv1 = nn.Conv1d(in_channels=1, out_channels=16, kernel_size=9, stride=3)
self.bn1 = nn.BatchNorm1d(16)
#output 2499
self.conv2 = nn.Conv1d(16, 32, kernel_size=9,stride=3)
self.bn2 = nn.BatchNorm1d(32)
#output 832
self.conv3 = nn.Conv1d(32, 64, kernel_size=9,stride=3)
self.bn3 = nn.BatchNorm1d(64)
#output 276
self.conv4 = nn.Conv1d(64, 128, kernel_size=9,stride=3)
self.bn4 = nn.BatchNorm1d(128)
#output 90
self.conv5 = nn.Conv1d(128, 256, kernel_size=9,stride=3)
self.bn5 = nn.BatchNorm1d(256)
#output 90
self.rnn1 = nn.Linear(17, 10)
self.dropout = nn.Dropout(dropout_rate)
def forward(self, x):
#Encoder
x = torch.tanh(self.bn1(self.conv1(x)))
x = self.dropout(x)
x = torch.tanh(self.bn2(self.conv2(x)))
x = self.dropout(x)
x = torch.tanh(self.bn3(self.conv3(x)))
x = self.dropout(x)
x = torch.tanh(self.bn4(self.conv4(x)))
x = self.dropout(x)
x = torch.tanh(self.bn5(self.conv5(x)))
x = self.dropout(x)
x = self.rnn1(x)
return x
#%%
class Decoder(nn.Module):
def __init__(self,dropout_rate,ngpu):
super(Decoder, self).__init__()
self.dropout_rate = dropout_rate
self.ngpu = ngpu
self.rnn2 = nn.Linear(10, 17)
self.bn5 = nn.BatchNorm1d(256)
self.deconv1 = nn.ConvTranspose1d(256, 128, kernel_size=9,stride=3,output_padding=1)
self.bn6 = nn.BatchNorm1d(128)
self.deconv2 = nn.ConvTranspose1d(128, 64, kernel_size=9,stride=3,output_padding=2)
self.bn7 = nn.BatchNorm1d(64)
self.deconv3 = nn.ConvTranspose1d(64, 32, kernel_size=9,stride=3,output_padding=0)
self.bn8 = nn.BatchNorm1d(32)
self.deconv4 = nn.ConvTranspose1d(32, 16, kernel_size=9,stride=3,output_padding=2)
self.bn9 = nn.BatchNorm1d(16)
self.deconv5 = nn.ConvTranspose1d(16, 1, kernel_size=9,stride=3,output_padding=2)
self.dropout = nn.Dropout(dropout_rate)
def forward(self, x):
x = self.rnn2(x)
x = torch.tanh(self.deconv1(self.bn5(x)))
x = self.dropout(x)
x = torch.tanh(self.deconv2(self.bn6(x)))
x = self.dropout(x)
x = torch.tanh(self.deconv3(self.bn7(x)))
x = self.dropout(x)
x = torch.tanh(self.deconv4(self.bn8(x)))
x = self.dropout(x)
x = self.deconv5(x)
return x
#%%
class Discriminator(nn.Module):
def __init__(self,dropout_rate,ngpu):
super(Discriminator, self).__init__()
self.dropout_rate = dropout_rate
self.ngpu = ngpu
self.dis_conv = nn.ModuleList([
nn.Conv1d(in_channels=1, out_channels=16, kernel_size=9, stride=3),
# printing(),
nn.BatchNorm1d(16),
nn.Tanh(),
nn.MaxPool1d(2,2),
nn.Conv1d(16, 32, kernel_size=9,stride=3),
# printing(),
nn.BatchNorm1d(32),
nn.Tanh(),
nn.MaxPool1d(2,2),
nn.Conv1d(32, 64, kernel_size=9,stride=3),
# printing(),
nn.BatchNorm1d(64),
nn.Tanh(),
nn.MaxPool1d(2,2),
nn.Conv1d(64, 128, kernel_size=9,stride=3),
# printing(),
nn.BatchNorm1d(128),
nn.Tanh(),
nn.MaxPool1d(2,2),
])
self.dis_dense = nn.ModuleList([
nn.Flatten(), #4352
nn.Linear(256, 32),
nn.BatchNorm1d(32),
nn.ReLU(),
nn.Linear(32, 1),
nn.BatchNorm1d(1),
nn.Sigmoid(),
])
def forward(self, input):
featurebank = []
for idx_l, layer in enumerate(self.dis_conv):
input = layer(input)
if("torch.nn.modules.activation" in str(type(layer))):
featurebank.append(input)
convout = input
for idx_l, layer in enumerate(self.dis_dense):
input = layer(input)
if("torch.nn.modules.activation" in str(type(layer))):
featurebank.append(input)
disc_score = input
return disc_score, featurebank
#%%
class Flatten(nn.Module):
def forward(self, input):
input=input.view(input.size(0), -1)
return input
#%%
class printing(nn.Module):
def forward(self, input):
print(input.shape)
return input
#%%

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