nn.leakyrelu和nn.sigmoid

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nn.leakyrelu和nn.sigmoid是PyTorch库中的激活函数。 nn.leakyrelu是一个带有负斜率的整流线性单元(rectified linear unit)。它可以通过引入一个小的负斜率来解决ReLU函数在负数输入时导致的神经元死亡问题。nn.leakyrelu函数可以通过调用torch.nn.LeakyReLU()来使用。它可以应用于标量、向量和多维数组输入。例如,对于输入x,可以使用LeakyReLU进行激活,如下所示: leakyrelu = nn.LeakyReLU() out = leakyrelu(x) nn.sigmoid是一个Sigmoid函数,它将输入映射到0和1之间的值。它常用于二分类问题的输出层。nn.sigmoid函数可以通过调用torch.nn.Sigmoid()来使用。它也可以应用于标量、向量和多维数组输入。例如,对于输入x,可以使用Sigmoid进行激活,如下所示: sigmoid = nn.Sigmoid() out = sigmoid(x) 需要注意的是,nn.leakyrelu和nn.sigmoid可以在网络层定义时使用nn.LeakyReLU()和nn.Sigmoid(),也可以作为函数调用在forward函数中使用F.leaky_relu()和F.sigmoid()。两者的使用场景有所不同,具体取决于你的需求和网络结构。<span class="em">1</span><span class="em">2</span><span class="em">3</span> #### 引用[.reference_title] - *1* [常用激活函数:Sigmoid/Softmax/ELU/ReLU/LeakyReLU/Tanh...(Pytorch)](https://blog.csdn.net/qq_43665602/article/details/126573992)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v92^chatsearchT3_1"}}] [.reference_item style="max-width: 50%"] - *2* *3* [PyTorch学习笔记(1)nn.Sequential、nn.Conv2d、nn.BatchNorm2d、nn.ReLU和nn.MaxPool2d](https://blog.csdn.net/weixin_42495721/article/details/111518564)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v92^chatsearchT3_1"}}] [.reference_item style="max-width: 50%"] [ .reference_list ]
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class Generator(nn.Module): def __init__(self): super(Generator, self).__init__() self.encoder = nn.Sequential( nn.Conv2d(6, 64, 3, stride=2, padding=1), nn.BatchNorm2d(64), nn.LeakyReLU(0.2), nn.Conv2d(64, 128, 3, stride=2, padding=1), nn.BatchNorm2d(128), nn.LeakyReLU(0.2), nn.Conv2d(128, 256, 3, stride=2, padding=1), nn.BatchNorm2d(256), nn.LeakyReLU(0.2), nn.Conv2d(256, 512, 3, stride=2, padding=1), nn.BatchNorm2d(512), nn.LeakyReLU(0.2), nn.Conv2d(512, 4000, 1), nn.BatchNorm2d(4000), nn.LeakyReLU(0.2) ) self.decoder = nn.Sequential( nn.ConvTranspose2d(4000, 512, 3, stride=2, padding=1, output_padding=1), nn.BatchNorm2d(512), nn.LeakyReLU(0.2), nn.ConvTranspose2d(512, 256, 3, stride=2, padding=1, output_padding=1), nn.BatchNorm2d(256), nn.LeakyReLU(0.2), nn.ConvTranspose2d(256, 128, 3, stride=2, padding=1, output_padding=1), nn.BatchNorm2d(128), nn.LeakyReLU(0.2), nn.ConvTranspose2d(128, 64, 3, stride=2, padding=1, output_padding=1), nn.BatchNorm2d(64), nn.LeakyReLU(0.2), nn.ConvTranspose2d(64, 3, 3, stride=1, padding=1), nn.Tanh() ) def forward(self, x1, x2): x = torch.cat([x1, x2], dim=1) x = self.encoder(x) x = self.decoder(x) return x class Discriminator(nn.Module): def __init__(self): super(Discriminator, self).__init__() self.conv = nn.Sequential( nn.Conv2d(3, 64, 4, stride=2, padding=1), nn.BatchNorm2d(64), nn.LeakyReLU(0.2), nn.Conv2d(64, 128, 4, stride=2, padding=1), nn.BatchNorm2d(128), nn.LeakyReLU(0.2), nn.Conv2d(128, 256, 4, stride=2, padding=1), nn.BatchNorm2d(256), nn.LeakyReLU(0.2), nn.Conv2d(256, 512, 4, stride=2, padding=1), nn.BatchNorm2d(512), nn.LeakyReLU(0.2), nn.Conv2d(512, 1, 4, stride=1), nn.Sigmoid() ) def forward(self, x): x = self.conv(x) return x 上述网络结构是什么GAN

加载InpaintingModel_gen.pth预训练模型时出现:RuntimeError: Error(s) in loading state_dict for ContextEncoder: Missing key(s) in state_dict: "encoder.0.weight", "encoder.0.bias", "encoder.2.weight", "encoder.2.bias", "encoder.3.weight", "encoder.3.bias", "encoder.3.running_mean", "encoder.3.running_var", "encoder.5.weight", "encoder.5.bias", "encoder.6.weight", "encoder.6.bias", "encoder.6.running_mean", "encoder.6.running_var",...并且载入的模型为:class ContextEncoder(nn.Module): def init(self): super(ContextEncoder, self).init() # 编码器 self.encoder = nn.Sequential( nn.Conv2d(4, 64, kernel_size=4, stride=2, padding=1), nn.LeakyReLU(0.2, inplace=True), nn.Conv2d(64, 128, kernel_size=4, stride=2, padding=1), nn.BatchNorm2d(128), nn.LeakyReLU(0.2, inplace=True), nn.Conv2d(128, 256, kernel_size=4, stride=2, padding=1), nn.BatchNorm2d(256), nn.LeakyReLU(0.2, inplace=True), nn.Conv2d(256, 512, kernel_size=4, stride=2, padding=1), nn.BatchNorm2d(512), nn.LeakyReLU(0.2, inplace=True), nn.Conv2d(512, 512, kernel_size=4, stride=2, padding=1), nn.BatchNorm2d(512), nn.LeakyReLU(0.2, inplace=True), nn.Conv2d(512, 512, kernel_size=4, stride=2, padding=1), nn.BatchNorm2d(512), nn.LeakyReLU(0.2, inplace=True), nn.Conv2d(512, 512, kernel_size=4, stride=2, padding=1), nn.BatchNorm2d(512), nn.LeakyReLU(0.2, inplace=True), nn.Conv2d(512, 512, kernel_size=4, stride=2, padding=1), nn.BatchNorm2d(512), nn.LeakyReLU(0.2, inplace=True), nn.Conv2d(512, 512, kernel_size=4, stride=2, padding=1), nn.BatchNorm2d(512), nn.LeakyReLU(0.2, inplace=True), ) # 解码器 self.decoder = nn.Sequential( nn.ConvTranspose2d(512, 512, kernel_size=4, stride=2, padding=1), nn.BatchNorm2d(512), nn.ReLU(inplace=True), nn.ConvTranspose2d(512, 512, kernel_size=4, stride=2, padding=1), nn.BatchNorm2d(512), nn.ReLU(inplace=True), nn.ConvTranspose2d(512, 512, kernel_size=4, stride=2, padding=1), nn.BatchNorm2d(512), nn.ReLU(inplace=True), nn.ConvTranspose2d(512, 512, kernel_size=4, stride=2, padding=1), nn.BatchNorm2d(512), nn.ReLU(inplace=True), nn.ConvTranspose2d(512, 256, kernel_size=4, stride=2, padding=1), nn.BatchNorm2d(256), nn.ReLU(inplace=True), nn.ConvTranspose2d(256, 128, kernel_size=4, stride=2, padding=1), nn.BatchNorm2d(128), nn.ReLU(inplace=True), nn.ConvTranspose2d(128, 64, kernel_size=4, stride=2, padding=1), nn.BatchNorm2d(64), nn.ReLU(inplace=True), nn.ConvTranspose2d(64, 3, kernel_size=4, stride=2, padding=1), nn.Sigmoid(), ) def forward(self, x): x = self.encoder(x) x = self.decoder(x) return x 要怎么改

pretrained_dict = torch.load('E:/fin/models/gen.pth') print(pretrained_dict.keys())上述语句打印出的键值dict_keys(['iteration', 'generator']) 怎么和下列生成器对齐:class ContextEncoder(nn.Module): def __init__(self): super(ContextEncoder, self).__init__() # 编码器 self.encoder = nn.Sequential( nn.Conv2d(4, 64, kernel_size=4, stride=2, padding=1), nn.LeakyReLU(0.2, inplace=True), nn.Conv2d(64, 128, kernel_size=4, stride=2, padding=1), nn.BatchNorm2d(128), nn.LeakyReLU(0.2, inplace=True), nn.Conv2d(128, 256, kernel_size=4, stride=2, padding=1), nn.BatchNorm2d(256), nn.LeakyReLU(0.2, inplace=True), nn.Conv2d(256, 512, kernel_size=4, stride=2, padding=1), nn.BatchNorm2d(512), nn.LeakyReLU(0.2, inplace=True), nn.Conv2d(512, 512, kernel_size=4, stride=2, padding=1), nn.BatchNorm2d(512), nn.LeakyReLU(0.2, inplace=True), nn.Conv2d(512, 512, kernel_size=4, stride=2, padding=1), nn.BatchNorm2d(512), nn.LeakyReLU(0.2, inplace=True), nn.Conv2d(512, 512, kernel_size=4, stride=2, padding=1), nn.BatchNorm2d(512), nn.LeakyReLU(0.2, inplace=True), nn.Conv2d(512, 512, kernel_size=4, stride=2, padding=1), nn.BatchNorm2d(512), nn.LeakyReLU(0.2, inplace=True), nn.Conv2d(512, 512, kernel_size=4, stride=2, padding=1), nn.BatchNorm2d(512), nn.LeakyReLU(0.2, inplace=True), ) # 解码器 self.decoder = nn.Sequential( nn.ConvTranspose2d(512, 512, kernel_size=4, stride=2, padding=1), nn.BatchNorm2d(512), nn.ReLU(inplace=True), nn.ConvTranspose2d(512, 512, kernel_size=4, stride=2, padding=1), nn.BatchNorm2d(512), nn.ReLU(inplace=True), nn.ConvTranspose2d(512, 512, kernel_size=4, stride=2, padding=1), nn.BatchNorm2d(512), nn.ReLU(inplace=True), nn.ConvTranspose2d(512, 512, kernel_size=4, stride=2, padding=1), nn.BatchNorm2d(512), nn.ReLU(inplace=True), nn.ConvTranspose2d(512, 256, kernel_size=4, stride=2, padding=1), nn.BatchNorm2d(256), nn.ReLU(inplace=True), nn.ConvTranspose2d(256, 128, kernel_size=4, stride=2, padding=1), nn.BatchNorm2d(128), nn.ReLU(inplace=True), nn.ConvTranspose2d(128, 64, kernel_size=4, stride=2, padding=1), nn.BatchNorm2d(64), nn.ReLU(inplace=True), nn.ConvTranspose2d(64, 3, kernel_size=4, stride=2, padding=1), nn.Sigmoid(), ) def forward(self, x): x = self.encoder(x) x = self.decoder(x) return x

class NLayerDiscriminator(nn.Module): def init(self, input_nc=3, ndf=64, n_layers=3, norm_layer=nn.BatchNorm2d, use_sigmoid=False, use_parallel=True): super(NLayerDiscriminator, self).init() self.use_parallel = use_parallel if type(norm_layer) == functools.partial: use_bias = norm_layer.func == nn.InstanceNorm2d else: use_bias = norm_layer == nn.InstanceNorm2d self.conv1 = nn.Conv2d(input_nc, ndf, kernel_size=3, padding=1) self.conv_offset1 = nn.Conv2d(ndf, 18, kernel_size=3, stride=1, padding=1) init_offset1 = torch.Tensor(np.zeros([18, ndf, 3, 3])) self.conv_offset1.weight = torch.nn.Parameter(init_offset1) # 初始化为0 self.conv_mask1 = nn.Conv2d(ndf, 9, kernel_size=3, stride=1, padding=1) init_mask1 = torch.Tensor(np.zeros([9, ndf, 3, 3]) + np.array([0.5])) self.conv_mask1.weight = torch.nn.Parameter(init_mask1) # 初始化为0.5 kw = 4 padw = int(np.ceil((kw-1)/2)) nf_mult = 1 for n in range(1, n_layers): nf_mult_prev = nf_mult nf_mult = min(2n, 8) self.sequence2 = [ nn.Conv2d(ndf * nf_mult_prev, ndf * nf_mult, kernel_size=kw, stride=2, padding=padw, bias=use_bias), norm_layer(ndf * nf_mult), nn.LeakyReLU(0.2, True) ] nf_mult_prev = nf_mult nf_mult = min(2n_layers, 8) self.sequence2 += [ nn.Conv2d(ndf * nf_mult_prev, ndf * nf_mult, kernel_size=kw, stride=1, padding=padw, bias=use_bias), norm_layer(ndf * nf_mult), nn.LeakyReLU(0.2, True) ] self.sequence2 += [nn.Conv2d(ndf * nf_mult, 1, kernel_size=kw, stride=1, padding=padw)] if use_sigmoid: self.sequence2 += [nn.Sigmoid()] def forward(self, input): input = self.conv1(input) offset1 = self.conv_offset1(input) mask1 = torch.sigmoid(self.conv_mask1(input)) sequence1 = [ torchvision.ops.deform_conv2d(input=input, offset=offset1, weight=self.conv1.weight, mask=mask1, padding=(1, 1)) ] sequence2 = sequence1 + self.sequence2 self.model = nn.Sequential(*sequence2) nn.LeakyReLU(0.2, True) return self.model(input),上述代码中出现错误:RuntimeError: Expected weight_c.size(1) * n_weight_grps == input_c.size(1) to be true, but got false. (Could this error message be improved? If so, please report an enhancement request to PyTorch.),请问如何解决,给出修改后的代码

class NLayerDiscriminator(nn.Module): def init(self, input_nc=3, ndf=64, n_layers=3, norm_layer=nn.BatchNorm2d, use_sigmoid=False, use_parallel=True): super(NLayerDiscriminator, self).init() self.use_parallel = use_parallel if type(norm_layer) == functools.partial: use_bias = norm_layer.func == nn.InstanceNorm2d else: use_bias = norm_layer == nn.InstanceNorm2d self.conv1 = nn.Conv2d(input_nc, ndf, kernel_size=3, padding=1) self.conv_offset1 = nn.Conv2d(ndf, 18, kernel_size=3, stride=1, padding=1) init_offset1 = torch.Tensor(np.zeros([18, ndf, 3, 3])) self.conv_offset1.weight = torch.nn.Parameter(init_offset1) # 初始化为0 self.conv_mask1 = nn.Conv2d(ndf, 9, kernel_size=3, stride=1, padding=1) init_mask1 = torch.Tensor(np.zeros([9, ndf, 3, 3]) + np.array([0.5])) self.conv_mask1.weight = torch.nn.Parameter(init_mask1) # 初始化为0.5 kw = 4 padw = int(np.ceil((kw-1)/2)) nf_mult = 1 for n in range(1, n_layers): nf_mult_prev = nf_mult nf_mult = min(2n, 8) self.sequence2 = [ nn.Conv2d(ndf * nf_mult_prev, ndf * nf_mult, kernel_size=kw, stride=2, padding=padw, bias=use_bias), norm_layer(ndf * nf_mult), nn.LeakyReLU(0.2, True) ] nf_mult_prev = nf_mult nf_mult = min(2n_layers, 8) self.sequence2 += [ nn.Conv2d(ndf * nf_mult_prev, ndf * nf_mult, kernel_size=kw, stride=1, padding=padw, bias=use_bias), norm_layer(ndf * nf_mult), nn.LeakyReLU(0.2, True) ] self.sequence2 += [nn.Conv2d(ndf * nf_mult, 1, kernel_size=kw, stride=1, padding=padw)] if use_sigmoid: self.sequence2 += [nn.Sigmoid()] def forward(self, input): input = self.conv1(input) offset1 = self.conv_offset1(input) mask1 = torch.sigmoid(self.conv_mask1(input)) sequence1 = [ torchvision.ops.deform_conv2d(input=input, offset=offset1, weight=self.conv1.weight, mask=mask1, padding=(1, 1)) ] sequence2 = sequence1 + self.sequence2 self.model = nn.Sequential(*sequence2) nn.LeakyReLU(0.2, True) return self.model(input),上述代码中:出现错误:torchvision.ops.deform_conv2d(input=input, offset=offset1,RuntimeError: Expected weight_c.size(1) * n_weight_grps == input_c.size(1) to be true, but got false. (Could this error message be improved? If so, please report an enhancement request to PyTorch.)

运行以下Python代码:import torchimport torch.nn as nnimport torch.optim as optimfrom torchvision import datasets, transformsfrom torch.utils.data import DataLoaderfrom torch.autograd import Variableclass Generator(nn.Module): def __init__(self, input_dim, output_dim, num_filters): super(Generator, self).__init__() self.input_dim = input_dim self.output_dim = output_dim self.num_filters = num_filters self.net = nn.Sequential( nn.Linear(input_dim, num_filters), nn.ReLU(), nn.Linear(num_filters, num_filters*2), nn.ReLU(), nn.Linear(num_filters*2, num_filters*4), nn.ReLU(), nn.Linear(num_filters*4, output_dim), nn.Tanh() ) def forward(self, x): x = self.net(x) return xclass Discriminator(nn.Module): def __init__(self, input_dim, num_filters): super(Discriminator, self).__init__() self.input_dim = input_dim self.num_filters = num_filters self.net = nn.Sequential( nn.Linear(input_dim, num_filters*4), nn.LeakyReLU(0.2), nn.Linear(num_filters*4, num_filters*2), nn.LeakyReLU(0.2), nn.Linear(num_filters*2, num_filters), nn.LeakyReLU(0.2), nn.Linear(num_filters, 1), nn.Sigmoid() ) def forward(self, x): x = self.net(x) return xclass ConditionalGAN(object): def __init__(self, input_dim, output_dim, num_filters, learning_rate): self.generator = Generator(input_dim, output_dim, num_filters) self.discriminator = Discriminator(input_dim+1, num_filters) self.optimizer_G = optim.Adam(self.generator.parameters(), lr=learning_rate) self.optimizer_D = optim.Adam(self.discriminator.parameters(), lr=learning_rate) def train(self, data_loader, num_epochs): for epoch in range(num_epochs): for i, (inputs, labels) in enumerate(data_loader): # Train discriminator with real data real_inputs = Variable(inputs) real_labels = Variable(labels) real_labels = real_labels.view(real_labels.size(0), 1) real_inputs = torch.cat((real_inputs, real_labels), 1) real_outputs = self.discriminator(real_inputs) real_loss = nn.BCELoss()(real_outputs, torch.ones(real_outputs.size())) # Train discriminator with fake data noise = Variable(torch.randn(inputs.size(0), self.generator.input_dim)) fake_labels = Variable(torch.LongTensor(inputs.size(0)).random_(0, 10)) fake_labels = fake_labels.view(fake_labels.size(0), 1) fake_inputs = self.generator(torch.cat((noise, fake_labels.float()), 1)) fake_inputs = torch.cat((fake_inputs, fake_labels), 1) fake_outputs = self.discriminator(fake_inputs) fake_loss = nn.BCELoss()(fake_outputs, torch.zeros(fake_outputs.size())) # Backpropagate and update weights for discriminator discriminator_loss = real_loss + fake_loss self.discriminator.zero_grad() discriminator_loss.backward() self.optimizer_D.step() # Train generator noise = Variable(torch.randn(inputs.size(0), self.generator.input_dim)) fake_labels = Variable(torch.LongTensor(inputs.size(0)).random_(0,

class NLayerDiscriminator(nn.Module): def init(self, input_nc=3, ndf=64, n_layers=3, norm_layer=nn.BatchNorm2d, use_sigmoid=False, use_parallel=True): super(NLayerDiscriminator, self).init() self.use_parallel = use_parallel if type(norm_layer) == functools.partial: use_bias = norm_layer.func == nn.InstanceNorm2d else: use_bias = norm_layer == nn.InstanceNorm2d self.conv1 = nn.Conv2d(input_nc, ndf, kernel_size=3, padding=1) self.conv_offset1 = nn.Conv2d(input_nc, 18, kernel_size=3, stride=1, padding=1) init_offset1 = torch.Tensor(np.zeros([18, input_nc, 3, 3])) self.conv_offset1.weight = torch.nn.Parameter(init_offset1) # 初始化为0 self.conv_mask1 = nn.Conv2d(input_nc, 9, kernel_size=3, stride=1, padding=1) init_mask1 = torch.Tensor(np.zeros([9, input_nc, 3, 3]) + np.array([0.5])) self.conv_mask1.weight = torch.nn.Parameter(init_mask1) # 初始化为0.5 kw = 4 padw = int(np.ceil((kw-1)/2)) nf_mult = 1 for n in range(1, n_layers): nf_mult_prev = nf_mult nf_mult = min(2n, 8) self.sequence = [ nn.Conv2d(ndf * nf_mult_prev, ndf * nf_mult, kernel_size=kw, stride=2, padding=padw, bias=use_bias), norm_layer(ndf * nf_mult), nn.LeakyReLU(0.2, True) ] nf_mult_prev = nf_mult nf_mult = min(2n_layers, 8) self.sequence += [ nn.Conv2d(ndf * nf_mult_prev, ndf * nf_mult, kernel_size=kw, stride=1, padding=padw, bias=use_bias), norm_layer(ndf * nf_mult), nn.LeakyReLU(0.2, True) ] self.sequence += [nn.Conv2d(ndf * nf_mult, 1, kernel_size=kw, stride=1, padding=padw)] if use_sigmoid: self.sequence += [nn.Sigmoid()] def forward(self, input): offset1 = self.conv_offset1(input) mask1 = torch.sigmoid(self.conv_mask1(input)) sequence1 = [ torchvision.ops.deform_conv2d(input=input, offset=offset1, weight=self.conv1.weight, mask=mask1, padding=(1, 1)) ] sequence = sequence1 + self.sequence self.model = nn.Sequential(*sequence) return self.model(input),上述代码出现问题:TypeError: torch.cuda.FloatTensor is not a Module subclass,如何修改

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