losses, fake_image, real_image, input_label, L1_loss, style_loss, clothes_mask, CE_loss, rgb, alpha = model( Variable(data['label'].cuda()), Variable(data['edge'].cuda()), Variable(img_fore.cuda()), Variable(mask_clothes.cuda()) , Variable(data['color'].cuda()), Variable(all_clothes_label.cuda()), Variable(data['image'].cuda()), Variable(data['pose'].cuda()), Variable(data['image'].cuda()), Variable(mask_fore.cuda())) Traceback (most recent call last): File "/home/a/下载/pycharm-community-2023.1.3/plugins/python-ce/helpers/pydev/pydevd.py", line 1496, in _exec pydev_imports.execfile(file, globals, locals) # execute the script File "/home/a/下载/pycharm-community-2023.1.3/plugins/python-ce/helpers/pydev/_pydev_imps/_pydev_execfile.py", line 18, in execfile exec(compile(contents+"\n", file, 'exec'), glob, loc) File "/home/a/pycharmproject/clothes_try_on_copy/try-on_parse/ACGPN_inference/use_100epoch_to_test.py", line 203, in <module> losses, fake_image, real_image, input_label, L1_loss, style_loss, clothes_mask, CE_loss, rgb, alpha = model( File "/home/a/.conda/envs/clothes_try_on_copy1/lib/python3.8/site-packages/torch/nn/modules/module.py", line 889, in _call_impl result = self.forward(*input, **kwargs) TypeError: forward() takes 2 positional arguments but 11 were given 进程已结束,退出代码1

lab 5.rar_economic dispatch_footballvev_matlab_with losses

Ecnomic dispatch when considering both losses and generating limits.

Losses-Data-hide.rar_Reversible Data_The Cover_decryption

This paper proposes a lossless, a reversible, and a combined data hiding schemes for public-key-encrypted images by exploiting the probabilistic and homomorphic properties of cryptosystems....

def train_step(real_ecg, dim): noise = tf.random.normal(dim) for i in range(disc_steps): with tf.GradientTape() as disc_tape: generated_ecg = generator(noise, training=True) real_output = discriminator(real_ecg, training=True) fake_output = discriminator(generated_ecg, training=True) disc_loss = discriminator_loss(real_output, fake_output) gradients_of_discriminator = disc_tape.gradient(disc_loss, discriminator.trainable_variables) discriminator_optimizer.apply_gradients(zip(gradients_of_discriminator, discriminator.trainable_variables)) ### for tensorboard ### disc_losses.update_state(disc_loss) fake_disc_accuracy.update_state(tf.zeros_like(fake_output), fake_output) real_disc_accuracy.update_state(tf.ones_like(real_output), real_output) ####################### with tf.GradientTape() as gen_tape: generated_ecg = generator(noise, training=True) fake_output = discriminator(generated_ecg, training=True) gen_loss = generator_loss(fake_output) gradients_of_generator = gen_tape.gradient(gen_loss, generator.trainable_variables) generator_optimizer.apply_gradients(zip(gradients_of_generator, generator.trainable_variables)) ### for tensorboard ### gen_losses.update_state(gen_loss) ####################### def train(dataset, epochs, dim): for epoch in tqdm(range(epochs)): for batch in dataset: train_step(batch, dim) disc_losses_list.append(disc_losses.result().numpy()) gen_losses_list.append(gen_losses.result().numpy()) fake_disc_accuracy_list.append(fake_disc_accuracy.result().numpy()) real_disc_accuracy_list.append(real_disc_accuracy.result().numpy()) ### for tensorboard ### # with disc_summary_writer.as_default(): # tf.summary.scalar('loss', disc_losses.result(), step=epoch) # tf.summary.scalar('fake_accuracy', fake_disc_accuracy.result(), step=epoch) # tf.summary.scalar('real_accuracy', real_disc_accuracy.result(), step=epoch) # with gen_summary_writer.as_default(): # tf.summary.scalar('loss', gen_losses.result(), step=epoch) disc_losses.reset_states() gen_losses.reset_states() fake_disc_accuracy.reset_states() real_disc_accuracy.reset_states() ####################### # Save the model every 5 epochs # if (epoch + 1) % 5 == 0: # generate_and_save_ecg(generator, epochs, seed, False) # checkpoint.save(file_prefix = checkpoint_prefix) # Generate after the final epoch display.clear_output(wait=True) generate_and_save_ecg(generator, epochs, seed, False)

这段代码看起来像是一个用TensorFlow实现的GAN（生成对抗网络）的训练...在训练过程中，每个batch都会调用train_step函数进行训练，并记录loss和accuracy等信息。最后，每隔一定的epoch就会保存模型和生成一些ECG数据。

def get_input_param_optimizer(input_img): # this line to show that input is a parameter that requires a gradient input_param = nn.Parameter(input_img.data) optimizer = optim.LBFGS([input_param]) return input_param, optimizer def run_style_transfer(cnn, content_img, style_img, input_img, num_steps=300, style_weight=1000, content_weight=1): """Run the style transfer.""" print('Building the style transfer model..') model, style_losses, content_losses = get_style_model_and_losses(cnn, style_img, content_img, style_weight, content_weight) input_param, optimizer = get_input_param_optimizer(input_img) print('Optimizing..') run = [0] while run[0] <= num_steps: def closure(): # correct the values of updated input image input_param.data.clamp_(0, 1) optimizer.zero_grad() model(input_param) style_score = 0 content_score = 0 for sl in style_losses: style_score += sl.backward() for cl in content_losses: content_score += cl.backward() run[0] += 1 if run[0] % 50 == 0: print("run {}:".format(run)) print('Style Loss : {:4f} Content Loss: {:4f}'.format( style_score.data[0], content_score.data[0])) print() return style_score + content_score optimizer.step(closure) # a last correction... input_param.data.clamp_(0, 1) return input_param.data

在 run_style_transfer 函数中，首先调用了 get_style_model_and_losses 函数来获取风格迁移模型，并拆分出样式损失和内容损失。然后，调用 get_input_param_optimizer 函数来获取输入图像参数和优化器。接...

解释以下这段代码：import tensorflow as tf gpus =tf.config.experimental.list_physical_devices(device_type='GPU') tf.config.experimental.set_virtual_device_configuration(gpus[0],[tf.config.experimental.VirtualDeviceConfiguration(memory_limit=4096)]) #import scipy.io as sio import pickle import os,random import matplotlib.pyplot as plt #import scipy.stats from tensorflow import losses from tensorflow.keras import Model from tensorflow.keras import layers import matplotlib.pyplot as plt import tensorflow as tf import numpy as np #import scipy.io as sio #import scipy.stats import math import os import pdb from tensorflow import losses from model import ResNet18 from re_dataset_real import train_image1,train_label1,test_image1,test_label1,val_image1,val_label1 from re_dataset_imag import train_image2,train_label2,test_image2,test_label2,val_image2,val_label2 def phsical_loss(y_true, y_pred): y_true =tf.cast(y_true, y_pred.dtype) loss_real=tf.keras.losses.MSE(y_true[0],y_pred[0]) loss_img= tf.keras.losses.MSE(y_true[1],y_pred[1]) amp_ture=tf.pow(y_true[0],2)+tf.pow(y_true[1],2) amp_pred=tf.pow(y_pred[0],2)+tf.pow(y_pred[1],2) loss_amp=tf.keras.losses.MSE(amp_ture,amp_pred) return loss_real+loss_img+loss_amp#两个子模型各加一个完整约束 def angle_loss(y_true, y_pred): y_true = tf.cast(y_true, y_pred.dtype) img_ture=tf.atan2(y_true[1],y_true[0]) img_pred=tf.atan2(y_pred[1],y_pred[0]) return tf.keras.losses.MAE(img_ture,img_pred) def amp_loss(y_true, y_pred): y_true = tf.cast(y_true, y_pred.dtype) amp_ture=tf.pow(y_true[0],2)+tf.pow(y_true[1],2) amp_pred=tf.pow(y_pred[0],2)+tf.pow(y_pred[1],2) loss_phsical=tf.keras.losses.MSE(amp_ture,amp_pred) return loss_phsical model_in=tf.keras.Input((16,16,1)) model_real_out=ResNet18([2,2,2,2])(model_in) model_img_out=ResNet18([2,2,2,2])(model_in) model_all=tf.keras.Model(model_in,[model_real_out,model_img_out]) model_all.compile(loss=phsical_loss, optimizer=tf.keras.optimizers.Adam(tf.keras.optimizers.schedules.InverseTimeDecay( 0.001, decay_steps=250*25, decay_rate=1, staircase=False)), metrics=['mse']) checkpoint_save_path= "C:\\Users\\Root\\Desktop\\bysj\\model_all.ckpt" if os.path.exists(checkpoint_save_path + '.index'): print('------------------load model all---------------------') model_all.load_weights(checkpoint_save_path) cp_callback = tf.keras.callbacks.ModelCheckpoint(filepath=checkpoint_save_path, save_weights_only=True,save_best_only=True)

此外，还定义了三个损失函数 phsical_loss、angle_loss 和 amp_loss，分别用于计算物理约束、角度约束和幅度约束。其中，物理约束的损失函数 phsical_loss 是由子模型输出的实数和虚数部分的均方误差以及模长的均方...

解释一下这段代码：def phsical_loss(y_true, y_pred): y_true =tf.cast(y_true, y_pred.dtype) loss_real=tf.keras.losses.MSE(y_true[0],y_pred[0]) loss_img= tf.keras.losses.MSE(y_true[1],y_pred[1]) amp_ture=tf.pow(y_true[0],2)+tf.pow(y_true[1],2) amp_pred=tf.pow(y_pred[0],2)+tf.pow(y_pred[1],2) loss_amp=tf.keras.losses.MSE(amp_ture,amp_pred) return loss_real+loss_img+loss_amp#两个子模型各加一个完整约束 model_in=tf.keras.Input((16,16,1)) model_real_out=ResNet18([2,2,2,2])(model_in) model_img_out=ResNet18([2,2,2,2])(model_in) model_all=tf.keras.Model(model_in,[model_real_out,model_img_out]) model_all.compile(loss=phsical_loss, optimizer=tf.keras.optimizers.Adam(tf.keras.optimizers.schedules.InverseTimeDecay( 0.001, decay_steps=250*100, decay_rate=1, staircase=False)), metrics=['mse']) checkpoint_save_path= "C:\\Users\\Root\\Desktop\\bysj\\model_all.ckpt" if os.path.exists(checkpoint_save_path + '.index'): print('------------------load model all---------------------') model_all.load_weights(checkpoint_save_path) train_db = tf.data.Dataset.from_tensor_slices((train_image1, (train_label1, train_label2))).batch(128) test_db = tf.data.Dataset.from_tensor_slices((test_image1, (test_label1, test_label2))).batch(128)

模型在训练过程中，每128个样本为一批次进行训练，训练数据为train_image1和(train_label1, train_label2)，测试数据为test_image1和(test_label1, test_label2)。最后，代码检查是否存在预训练模型的权重文件，如果...

def get_style_model_and_losses(cnn, style_img, content_img, style_weight=1000, content_weight=1, content_layers=content_layers_default, style_layers=style_layers_default): cnn = copy.deepcopy(cnn) # just in order to have an iterable access to or list of content/syle # losses content_losses = [] style_losses = [] model = nn.Sequential() # the new Sequential module network gram = GramMatrix() # we need a gram module in order to compute style targets # move these modules to the GPU if possible: if use_cuda: model = model.cuda() gram = gram.cuda()

这是一个 PyTorch 中的函数，用于获取风格迁移模型和...其中，参数 style_weight 和 content_weight 控制了风格和内容损失的相对权重，而 content_layers 和 style_layers 则指定了计算内容和风格损失所用的网络层。

解释一下这段代码：import tensorflow as tf from im_dataset import train_image, train_label, test_image, test_label from Resnet18 import ResNet18 import os import matplotlib.pyplot as plt import argparse import numpy as np train_db = tf.data.Dataset.from_tensor_slices((train_image, train_label)) test_db = tf.data.Dataset.from_tensor_slices((test_image, test_label)) model = ResNet18([2, 2, 2, 2]) model.build(input_shape=(128, 32, 32, 1)) model.compile(optimizer = tf.keras.optimizers.Adam(lr = 1e-3), loss = tf.keras.losses.MSE, metrics = ['MSE']) checkpoint_save_path = "./checkpoint/InceptionNet_im_3/checkpoint.ckpt" if os.path.exists(checkpoint_save_path+'.index'): print('------------------load the model---------------------') model.load_weights(checkpoint_save_path) cp_callback = tf.keras.callbacks.ModelCheckpoint(filepath=checkpoint_save_path,save_weights_only=True,save_best_only=True) history = model.fit(train_db, epochs=500,batch_size=128, validation_data=test_db, validation_freq=1, callbacks=[cp_callback]) model.summary() acc = history.history['loss'] val_acc = history.history['val_loss'] plt.plot(acc, label='Training MSE') plt.plot(val_acc, label='Validation MSE') plt.title('Training and Validation MSE') plt.legend() plt.show()

这段代码实现了使用 ResNet18 模型对图像进行分类和训练。首先通过导入 TensorFlow 和相关模块，加载训练和测试数据。之后，使用 ResNet18 模型构建一个神经网络，并编译模型，设置优化器和损失函数。...

for _, (image_s, label_s) in enumerate(test_dloader_s): image_s = image_s.cuda() label_s = label_s.long().cuda() with torch.no_grad(): output_s = classifier_list[s_i + 1](model_list[s_i + 1](image_s)) label_onehot_s = torch.zeros(label_s.size(0), num_classes).cuda().scatter_(1, label_s.view(-1, 1), 1) task_loss_s = task_criterion(output_s, label_s) # output_t：模型针对特定任务预测的结果。 # label_t：真实标签，即特定任务的正确答案。 source_domain_losses[s_i].update(float(task_loss_s.item()), image_s.size(0)) tmp_score.append(torch.softmax(output_s, dim=1)) # turn label into one-hot code tmp_label.append(label_onehot_s)这段代码的含义

这段代码是针对测试集进行推理的。首先，使用enumerate函数对test_dloader_s迭代遍历，得到每个图像和对应的标签。接下来，将图像和标签都移至GPU上...最后，计算任务损失task_loss_s，以评估网络对测试集分类的性能。

分析这个代码class OhemCrossEntropy(nn.Module): def init(self, ignore_label=-1, thres=0.7, min_kept=100000, weight=None): super(OhemCrossEntropy, self).init() self.thresh = thres self.min_kept = max(1, min_kept) self.ignore_label = ignore_label self.criterion = nn.CrossEntropyLoss( weight=weight, ignore_index=ignore_label, reduction='none' ) def _ce_forward(self, score, target): ph, pw = score.size(2), score.size(3) h, w = target.size(1), target.size(2) if ph != h or pw != w: score = F.interpolate(input=score, size=( h, w), mode='bilinear', align_corners=config.MODEL.ALIGN_CORNERS) loss = self.criterion(score, target) return loss def _ohem_forward(self, score, target, **kwargs): ph, pw = score.size(2), score.size(3) h, w = target.size(1), target.size(2) if ph != h or pw != w: score = F.interpolate(input=score, size=( h, w), mode='bilinear', align_corners=config.MODEL.ALIGN_CORNERS) pred = F.softmax(score, dim=1) pixel_losses = self.criterion(score, target).contiguous().view(-1) mask = target.contiguous().view(-1) != self.ignore_label tmp_target = target.clone() tmp_target[tmp_target == self.ignore_label] = 0 pred = pred.gather(1, tmp_target.unsqueeze(1)) pred, ind = pred.contiguous().view(-1,)[mask].contiguous().sort() min_value = pred[min(self.min_kept, pred.numel() - 1)] threshold = max(min_value, self.thresh) pixel_losses = pixel_losses[mask][ind] pixel_losses = pixel_losses[pred < threshold] return pixel_losses.mean() def forward(self, score, target): if config.MODEL.NUM_OUTPUTS == 1: score = [score] weights = config.LOSS.BALANCE_WEIGHTS assert len(weights) == len(score) functions = [self._ce_forward] * \ (len(weights) - 1) + [self._ohem_forward] return sum([ w * func(x, target) for (w, x, func) in zip(weights, score, functions) ])

这是一个实现了OHEM(Online Hard Example Mining)的..._ce_forward函数实现了普通的交叉熵损失的计算；_ohem_forward函数实现了OHEM的计算。在forward函数中，对于有多个输出的模型，采用了权重平衡的方式进行计算。

import matplotlib.pyplot as plt train_losses, train_accs, test_losses, test_accs = [], [], [], [] for epoch in range(100): train_loss, train_acc = train(model, train_loader, criterion, optimizer) test_loss, test_acc = test(model, test_loader, criterion) train_losses.append(train_loss) train_accs.append(train_acc) test_losses.append(test_loss) test_accs.append(test_acc) print('Epoch: {} Train Loss: {:.4f} Train Acc: {:.4f} Test Loss: {:.4f} Test Acc: {:.4f}'.format( epoch, train_loss, train_acc, test_loss, test_acc)) # 绘制损失函数曲线 plt.plot(train_losses, label='Train Loss') plt.plot(test_losses, label='Test Loss') plt.legend() plt.show() # 绘制准确率曲线 plt.plot(train_accs, label='Train Acc') plt.plot(test_accs, label='Test Acc') plt.legend() plt.show() 图像纵坐标设置为0~1

plt.plot(train_losses, label='Train Loss') plt.plot(test_losses, label='Test Loss') plt.ylim([0, 1]) # 设置y轴范围为0~1 plt.legend() plt.show() # 绘制准确率曲线 plt.plot(train_accs, label='Train Acc'...

def draw_loss(n_epochs, losses, val_losses): epochs_range = range(n_epochs) fig1=plt.figure(figsize=(4,3)) plt.plot(epochs_range, losses, 'orange', label='train loss') plt.plot(epochs_range, val_losses, '-.k', label='test loss') # plt.title('loss') plt.xlabel('Epochs') plt.ylabel('Loss') plt.legend() plt.savefig('experiments/loss_figure.png')

它接受三个参数：n_epochs 表示训练迭代的总数，losses 表示每个迭代的训练损失，val_losses 表示每个迭代的验证损失。它使用 matplotlib 库来创建一个简单的折线图，其中包含训练和验证损失。每个损失都用不同的...

这段代码的错误def do_train( model, data_loader, criterion, optimizer, scheduler, metric ): model.train() global_step = 0 tic_train = time.time() log_steps=100 for epoch in range(num_train_epochs): losses = [] for step,sample in enumerate(data_loader): print(sample) input_ids = sample["input_ids"] token_type_ids = sample["token_type_ids"] outputs = model(input_ids=input_ids, token_type_ids=token_type_ids) print(outputs) # 多任务学习 loss_love = criterion(outputs['love'], sample['love']) loss_joy = criterion(outputs['joy'], sample['joy']) loss_fright = criterion(outputs['fright'], sample['fright']) loss_anger = criterion(outputs['anger'], sample['anger']) loss_fear = criterion(outputs['fear'], sample['fear']) loss_sorrow = criterion(outputs['sorrow'], sample['sorrow']) loss = loss_love + loss_joy + loss_fright + loss_anger + loss_fear + loss_sorrow for label_col in target_cols: correct = metric.compute(outputs[label_col], sample[label_col]) metric.update(correct) acc = metric.accumulate() losses.append(loss.numpy())

需要在计算得到 loss 后加上 loss.backward() 和 optimizer.step()。 4. 在计算 loss 的时候，应该先将 outputs 进行 softmax 处理，否则可能导致 loss 过大。可以使用 F.softmax(outputs, dim=1) 进行...

解释loss_dict_reduced = utils.reduce_dict(loss_dict) losses_reduced = sum(loss for loss in loss_dict_reduced.values())

这行代码用于计算一个总的loss值。...然后我们通过loss_dict_reduced.values()获取所有loss值，使用sum()函数将它们累加起来，得到最终的losses_reduced值。这个值可以用于计算梯度并更新神经网络参数。

import tensorflow as tf from im_dataset import train_image, train_label, test_image, test_label from AlexNet8 import AlexNet8 from baseline import baseline from InceptionNet import Inception10 from Resnet18 import ResNet18 import os import matplotlib.pyplot as plt import argparse import numpy as np parse = argparse.ArgumentParser(description="CVAE model for generation of metamaterial") hyperparameter_set = parse.add_argument_group(title='HyperParameter Setting') dim_set = parse.add_argument_group(title='Dim setting') hyperparameter_set.add_argument("--num_epochs",type=int,default=200,help="Number of train epochs") hyperparameter_set.add_argument("--learning_rate",type=float,default=4e-3,help="learning rate") hyperparameter_set.add_argument("--image_size",type=int,default=16*16,help="vector size of image") hyperparameter_set.add_argument("--batch_size",type=int,default=16,help="batch size of database") dim_set.add_argument("--z_dim",type=int,default=20,help="dim of latent variable") dim_set.add_argument("--feature_dim",type=int,default=32,help="dim of feature vector") dim_set.add_argument("--phase_curve_dim",type=int,default=41,help="dim of phase curve vector") dim_set.add_argument("--image_dim",type=int,default=16,help="image size: [image_dim,image_dim,1]") args = parse.parse_args() def preprocess(x, y): x = tf.io.read_file(x) x = tf.image.decode_png(x, channels=1) x = tf.cast(x,dtype=tf.float32) /255. x1 = tf.concat([x, x], 0) x2 = tf.concat([x1, x1], 1) x = x - 0.5 y = tf.convert_to_tensor(y) y = tf.cast(y,dtype=tf.float32) return x2, y train_db = tf.data.Dataset.from_tensor_slices((train_image, train_label)) train_db = train_db.shuffle(100).map(preprocess).batch(args.batch_size) test_db = tf.data.Dataset.from_tensor_slices((test_image, test_label)) test_db = test_db.map(preprocess).batch(args.batch_size) model = ResNet18([2, 2, 2, 2]) model.build(input_shape=(args.batch_size, 32, 32, 1)) model.compile(optimizer = tf.keras.optimizers.Adam(lr = 1e-3), loss = tf.keras.losses.MSE, metrics = ['MSE']) checkpoint_save_path = "./checkpoint/InceptionNet_im_3/checkpoint.ckpt" if os.path.exists(checkpoint_save_path+'.index'): print('------------------load the model---------------------') model.load_weights(checkpoint_save_path) cp_callback = tf.keras.callbacks.ModelCheckpoint(filepath=checkpoint_save_path,save_weights_only=True,save_best_only=True) history = model.fit(train_db, epochs=500, validation_data=test_db, validation_freq=1, callbacks=[cp_callback]) model.summary() acc = history.history['loss'] val_acc = history.history['val_loss'] plt.plot(acc, label='Training MSE') plt.plot(val_acc, label='Validation MSE') plt.title('Training and Validation MSE') plt.legend() plt.show()

这段代码是使用 TensorFlow 构建了一个 ResNet18 模型，对图像进行分类任务。其中使用了 argparse 库来设置超参数，使用了 tf.data.Dataset 来进行数据处理和加载，使用了 tf.keras.callbacks.ModelCheckpoint 来...

解释import tensorflow as tf from im_dataset import train_image, train_label, test_image, test_label from AlexNet8 import AlexNet8 from baseline import baseline from InceptionNet import Inception10 from Resnet18 import ResNet18 import os import matplotlib.pyplot as plt import argparse import numpy as np parse = argparse.ArgumentParser(description="CVAE model for generation of metamaterial") hyperparameter_set = parse.add_argument_group(title='HyperParameter Setting') dim_set = parse.add_argument_group(title='Dim setting') hyperparameter_set.add_argument("--num_epochs",type=int,default=200,help="Number of train epochs") hyperparameter_set.add_argument("--learning_rate",type=float,default=4e-3,help="learning rate") hyperparameter_set.add_argument("--image_size",type=int,default=16*16,help="vector size of image") hyperparameter_set.add_argument("--batch_size",type=int,default=16,help="batch size of database") dim_set.add_argument("--z_dim",type=int,default=20,help="dim of latent variable") dim_set.add_argument("--feature_dim",type=int,default=32,help="dim of feature vector") dim_set.add_argument("--phase_curve_dim",type=int,default=41,help="dim of phase curve vector") dim_set.add_argument("--image_dim",type=int,default=16,help="image size: [image_dim,image_dim,1]") args = parse.parse_args() def preprocess(x, y): x = tf.io.read_file(x) x = tf.image.decode_png(x, channels=1) x = tf.cast(x,dtype=tf.float32) /255. x1 = tf.concat([x, x], 0) x2 = tf.concat([x1, x1], 1) x = x - 0.5 y = tf.convert_to_tensor(y) y = tf.cast(y,dtype=tf.float32) return x2, y train_db = tf.data.Dataset.from_tensor_slices((train_image, train_label)) train_db = train_db.shuffle(100).map(preprocess).batch(args.batch_size) test_db = tf.data.Dataset.from_tensor_slices((test_image, test_label)) test_db = test_db.map(preprocess).batch(args.batch_size) model = ResNet18([2, 2, 2, 2]) model.build(input_shape=(args.batch_size, 32, 32, 1)) model.compile(optimizer = tf.keras.optimizers.Adam(lr = 1e-3), loss = tf.keras.losses.MSE, metrics = ['MSE']) checkpoint_save_path = "./checkpoint/InceptionNet_im_3/checkpoint.ckpt" if os.path.exists(checkpoint_save_path+'.index'): print('------------------load the model---------------------') model.load_weights(checkpoint_save_path) cp_callback = tf.keras.callbacks.ModelCheckpoint(filepath=checkpoint_save_path,save_weights_only=True,save_best_only=True) history = model.fit(train_db, epochs=500, validation_data=test_db, validation_freq=1, callbacks=[cp_callback]) model.summary() acc = history.history['loss'] val_acc = history.history['val_loss'] plt.plot(acc, label='Training MSE') plt.plot(val_acc, label='Validation MSE') plt.title('Training and Validation MSE') plt.legend() plt.show()

具体来说，它的输入数据是 train_image 和 train_label，输出结果是对 test_image 进行分类的预测结果。在训练过程中，它使用了 Adam 优化器和均方误差损失函数，并且使用了 ModelCheckpoint 回调函数来保存最佳的...

generator = build_lstm_generator(seq_len, hidden_size, n_embeddings,compiler=False) discriminator = build_lstm_discriminator(seq_len + 1, hidden_size, n_embeddings) optimizer = Adam(learning_rate=0.0001) save_freq = 1000 gen_losses = Mean() dis_losses = Mean() for i,(x_inputs,x_outputs) in enumerate(dataset): gen_loss,dis_loss = train_on_step(x_inputs,x_outputs) gen_losses.update_state(gen_loss) dis_losses.update_state(dis_loss) if (i+1) % save_freq == 0: generator.save_weights(f"saved_models/iter-{(i+1)//save_freq}.h5") if i % 20 == 0: print(f'iter: {i}, generatorLoss: {gen_losses.result()}, discriminatorLoss: {dis_losses.result()}') gen_losses.reset_state() dis_losses.reset_state()

这段代码中，首先使用build_lstm_generator()函数和build_lstm_discriminator()函数分别创建了一个生成器和一个判别器，并使用Adam()函数定义了一个Adam优化器，学习率为0.0001。seq_len、hidden_size、n...

帮我把下面这个代码从TensorFlow改成pytorch import tensorflow as tf import os import numpy as np import matplotlib.pyplot as plt os.environ["CUDA_VISIBLE_DEVICES"] = "0" base_dir = 'E:/direction/datasetsall/' train_dir = os.path.join(base_dir, 'train_img/') validation_dir = os.path.join(base_dir, 'val_img/') train_cats_dir = os.path.join(train_dir, 'down') train_dogs_dir = os.path.join(train_dir, 'up') validation_cats_dir = os.path.join(validation_dir, 'down') validation_dogs_dir = os.path.join(validation_dir, 'up') batch_size = 64 epochs = 50 IMG_HEIGHT = 128 IMG_WIDTH = 128 num_cats_tr = len(os.listdir(train_cats_dir)) num_dogs_tr = len(os.listdir(train_dogs_dir)) num_cats_val = len(os.listdir(validation_cats_dir)) num_dogs_val = len(os.listdir(validation_dogs_dir)) total_train = num_cats_tr + num_dogs_tr total_val = num_cats_val + num_dogs_val train_image_generator = tf.keras.preprocessing.image.ImageDataGenerator(rescale=1. / 255) validation_image_generator = tf.keras.preprocessing.image.ImageDataGenerator(rescale=1. / 255) train_data_gen = train_image_generator.flow_from_directory(batch_size=batch_size, directory=train_dir, shuffle=True, target_size=(IMG_HEIGHT, IMG_WIDTH), class_mode='categorical') val_data_gen = validation_image_generator.flow_from_directory(batch_size=batch_size, directory=validation_dir, target_size=(IMG_HEIGHT, IMG_WIDTH), class_mode='categorical') sample_training_images, _ = next(train_data_gen) model = tf.keras.models.Sequential([ tf.keras.layers.Conv2D(16, 3, padding='same', activation='relu', input_shape=(IMG_HEIGHT, IMG_WIDTH, 3)), tf.keras.layers.MaxPooling2D(), tf.keras.layers.Conv2D(32, 3, padding='same', activation='relu'), tf.keras.layers.MaxPooling2D(), tf.keras.layers.Conv2D(64, 3, padding='same', activation='relu'), tf.keras.layers.MaxPooling2D(), tf.keras.layers.Flatten(), tf.keras.layers.Dense(256, activation='relu'), tf.keras.layers.Dense(2, activation='softmax') ]) model.compile(optimizer='adam', loss=tf.keras.losses.BinaryCrossentropy(from_logits=True), metrics=['accuracy']) model.summary() history = model.fit_generator( train_data_gen, steps_per_epoch=total_train // batch_size, epochs=epochs, validation_data=val_data_gen, validation_steps=total_val // batch_size ) # 可视化训练结果 acc = history.history['accuracy'] val_acc = history.history['val_accuracy'] loss = history.history['loss'] val_loss = history.history['val_loss'] epochs_range = range(epochs) model.save("./model/timo_classification_128_maxPool2D_dense256.h5")

labels) loss.backward() optimizer.step() running_loss += loss.item() epoch_loss = running_loss / (len(train_data_gen) / batch_size) print('Epoch: %d, Loss: %.3f' % (epoch + 1, epoch_loss)) correct = ...

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