input_2 = keras.Input(shape=(176,)) x = keras.layers.Reshape((-1, 176, 1))(input_2) x = keras.layers.LayerNormalization()(x) x = Conv1D(filters=16, kernel_size=12, strides=4, padding='causal')(x) x = tf.keras.layers.Dropout(0.4)(x) x = tcnBlock(x, 16, 3, 1) x = tcnBlock(x, 8, 3, 2) x = tcnBlock(x, 4, 3, 4) x = GlobalAveragePooling1D()(x) x = keras.layers.LayerNormalization()(x) output_2 = keras.layers.Dense(1, activation='sigmoid')(x) model2 = keras.Model(inputs=input_2, outputs=output_2) model2.summary()结合上边的自定义,这段代码有什么问题

时间: 2023-09-28 16:11:06 浏览: 61
这段代码的结构看起来没有问题,但是需要注意以下几点: 1. 没有导入 `Conv1D` 和 `GlobalAveragePooling1D`,需要在代码开头加上 `from tensorflow.keras.layers import Conv1D, GlobalAveragePooling1D`。 2. 在第 3 行中,`Reshape` 层的参数应该是 `(176, 1)` 而不是 `(-1, 176, 1)`,因为 `-1` 表示这个维度的大小由其他维度推断出来,但在这里不能推断出来。 3. 在第 6 行中,`tf.keras.layers.Dropout` 应该改为 `keras.layers.Dropout`,因为前面已经使用了 `keras` 的命名空间。 4. 在第 7 行中,`tcnBlock` 是自定义的函数,需要检查该函数的实现是否正确并且已经导入。 5. 在第 13 行中,`keras.layers.LayerNormalization` 应该传入 `axis=-1`,以便在最后一个轴上进行归一化。 总体来说,这段代码可能是一个用于进行时间序列分类或回归的模型,使用了 TCN (Temporal Convolutional Networks) 的结构,通过 `Conv1D` 层捕捉时间序列中的局部模式,通过 `tcnBlock` 层进行多层次的时间特征提取,最终通过全局平均池化和 `Dense` 层进行分类或回归。
相关问题

input_2 = keras.Input(shape=(160,)) x = keras.layers.LayerNormalization()(input_2) x = keras.layers.Reshape((160, 1))(x) x = Conv1D(filters=16, kernel_size=12, strides=4, padding='causal')(x) x = tf.keras.layers.Dropout(0.4)(x) x = tcnBlock(x, 12, 3, 1) x = tcnBlock(x, 6, 3, 2) x = tcnBlock(x, 4, 3, 4) x = GlobalAveragePooling1D()(x) x = keras.layers.LayerNormalization()(x) output_2 = keras.layers.Dense(1, activation='sigmoid')(x) model2 = keras.Model(inputs=input_2, outputs=output_2) model2.summary()这段代码正确吗

这段代码是有问题的。 在这段代码中,定义了一个包含多个TCN块(`tcnBlock`)的一维卷积神经网络模型。但是,这个模型的输出层是一个单个神经元,输出一个标量值。这意味着,这个模型是用来处理二分类问题的,需要对每个输入样本输出一个二元分类结果。 然而,在这个模型中,输入层的形状是`(160,)`,即一维的长度为160的向量,这个形状是不正确的。因为在模型中使用了一维卷积层,需要将输入转化为三维张量,其中第一维表示时间步长,第二维表示输入特征的数量,第三维表示通道数。所以需要将输入张量的形状修改为`(160, 1)`。 此外,在这个模型中,`tcnBlock`的参数数量也需要进行修改。在`tcnBlock`的定义中,第一个参数`incoming`表示输入张量,应该是一个三维张量。但是在这个模型中,输入张量的通道数是1,因此需要修改`tcnBlock`的定义,将其输入张量的通道数设置为1。 最后,在这个模型中,`keras.layers.LayerNormalization`和`keras.layers.Reshape`等层的导入方式有问题,应该使用`from tensorflow.keras.layers import LayerNormalization, Reshape`的方式导入。 下面是修正后的代码: ``` from tensorflow.keras.layers import Input, LayerNormalization, Reshape, Conv1D, GlobalAveragePooling1D, Dropout, Dense from tensorflow.keras import regularizers def tcnBlock(incoming, filters, kernel_size, dilation_rate): net = incoming identity = incoming net = LayerNormalization()(net) net = keras.layers.LeakyReLU(alpha=0.2)(net) net = Dropout(0.3)(net) net = Conv1D(filters, kernel_size, padding='causal', dilation_rate=dilation_rate, kernel_regularizer=regularizers.l2(1e-3))(net) if identity.shape[-1] == filters: shortcut = identity else: shortcut = Conv1D(filters, kernel_size, padding='same')(identity) net = keras.layers.add([net, shortcut]) return net input_2 = Input(shape=(160, 1)) x = LayerNormalization()(input_2) x = Conv1D(filters=16, kernel_size=12, strides=4, padding='causal')(x) x = Dropout(0.4)(x) x = tcnBlock(x, 16, 3, 1) x = tcnBlock(x, 8, 3, 2) x = tcnBlock(x, 4, 3, 4) x = GlobalAveragePooling1D()(x) x = LayerNormalization()(x) output_2 = Dense(1, activation='sigmoid')(x) model2 = keras.Model(inputs=input_2, outputs=output_2) model2.summary() ```

input_1 = keras.Input(shape=(1292, 1)) x = Conv1D(filters=4, kernel_size=11, strides=9, padding='same', activation='relu')(input_1) x = Conv1D(filters=8, kernel_size=9, strides=4, padding='same', activation='relu')(x) x = Conv1D(filters=16, kernel_size=7, strides=4, padding='same', activation='relu')(x) output_1 = keras.layers.Flatten()(x) # TensorSpec(shape=(None, 160) model1 = keras.Model(inputs=input_1, outputs=output_1, name="fs_feature") model1.summary() #怎么改让输出为160维

在上述代码中,最后一层是通过`Flatten()`将多维的输出展平成了一维向量,因此输出的维度为`(None, 160)`,其中`None`表示可以接受任意数量的样本。如果希望输出的维度仍为`(None, 1, 160)`,可以在最后一层的参数中添加`reshape`操作,代码如下所示: ``` input_1 = keras.Input(shape=(1292, 1)) x = Conv1D(filters=4, kernel_size=11, strides=9, padding='same', activation='relu')(input_1) x = Conv1D(filters=8, kernel_size=9, strides=4, padding='same', activation='relu')(x) x = Conv1D(filters=16, kernel_size=7, strides=4, padding='same', activation='relu')(x) x = keras.layers.Flatten()(x) output_1 = keras.layers.Reshape((1, 160))(x) model1 = keras.Model(inputs=input_1, outputs=output_1, name="fs_feature") model1.summary() ``` 在上述代码中,`Reshape((1, 160))`将一维向量重新变为了三维张量,其中第一维为样本数量,第二维为1,第三维为160。

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import tensorflow as tf import tensorflow_hub as hub from tensorflow.keras import layers import bert import numpy as np from transformers import BertTokenizer, BertModel # 设置BERT模型的路径和参数 bert_path = "E:\\AAA\\523\\BERT-pytorch-master\\bert1.ckpt" max_seq_length = 128 train_batch_size = 32 learning_rate = 2e-5 num_train_epochs = 3 # 加载BERT模型 def create_model(): input_word_ids = tf.keras.layers.Input(shape=(max_seq_length,), dtype=tf.int32, name="input_word_ids") input_mask = tf.keras.layers.Input(shape=(max_seq_length,), dtype=tf.int32, name="input_mask") segment_ids = tf.keras.layers.Input(shape=(max_seq_length,), dtype=tf.int32, name="segment_ids") bert_layer = hub.KerasLayer(bert_path, trainable=True) pooled_output, sequence_output = bert_layer([input_word_ids, input_mask, segment_ids]) output = layers.Dense(1, activation='sigmoid')(pooled_output) model = tf.keras.models.Model(inputs=[input_word_ids, input_mask, segment_ids], outputs=output) return model # 准备数据 def create_input_data(sentences, labels): tokenizer = bert.tokenization.FullTokenizer(vocab_file=bert_path + "trainer/vocab.small", do_lower_case=True) # tokenizer = BertTokenizer.from_pretrained('bert-base-uncased') input_ids = [] input_masks = [] segment_ids = [] for sentence in sentences: tokens = tokenizer.tokenize(sentence) tokens = ["[CLS]"] + tokens + ["[SEP]"] input_id = tokenizer.convert_tokens_to_ids(tokens) input_mask = [1] * len(input_id) segment_id = [0] * len(input_id) padding_length = max_seq_length - len(input_id) input_id += [0] * padding_length input_mask += [0] * padding_length segment_id += [0] * padding_length input_ids.append(input_id) input_masks.append(input_mask) segment_ids.append(segment_id) return np.array(input_ids), np.array(input_masks), np.array(segment_ids), np.array(labels) # 加载训练数据 train_sentences = ["Example sentence 1", "Example sentence 2", ...] train_labels = [0, 1, ...] train_input_ids, train_input_masks, train_segment_ids, train_labels = create_input_data(train_sentences, train_labels) # 构建模型 model = create_model() model.compile(optimizer=tf.keras.optimizers.Adam(lr=learning_rate), loss='binary_crossentropy', metrics=['accuracy']) # 开始微调 model.fit([train_input_ids, train_input_masks, train_segment_ids], train_labels, batch_size=train_batch_size, epochs=num_train_epochs)这段代码有什么问题吗?

import numpy as np import tensorflow as tf from tensorflow import keras import matplotlib.pyplot as plt ## Let us define a plt function for simplicity def plt_loss(x,training_metric,testing_metric,ax,colors = ['b']): ax.plot(x,training_metric,'b',label = 'Train') ax.plot(x,testing_metric,'k',label = 'Test') ax.set_xlabel('Epochs') ax.set_ylabel('Accuarcy')# ax.set_ylabel('Categorical Crossentropy Loss') plt.legend() plt.grid() plt.show() tf.keras.utils.set_random_seed(1) ## We import the Minist Dataset using Keras.datasets (train_data, train_labels), (test_data, test_labels) = keras.datasets.mnist.load_data() ## We first vectorize the image (28*28) into a vector (784) train_data = train_data.reshape(train_data.shape[0],train_data.shape[1]train_data.shape[2]) # 60000784 test_data = test_data.reshape(test_data.shape[0],test_data.shape[1]test_data.shape[2]) # 10000784 ## We next change label number to a 10 dimensional vector, e.g., 1->[0,1,0,0,0,0,0,0,0,0] train_labels = keras.utils.to_categorical(train_labels,10) test_labels = keras.utils.to_categorical(test_labels,10) ## start to build a MLP model N_batch_size = 5000 N_epochs = 100 lr = 0.01 ## we build a three layer model, 784 -> 64 -> 10 MLP_4 = keras.models.Sequential([ keras.layers.Dense(128, input_shape=(784,),activation='relu'), keras.layers.Dense(64,activation='relu'), keras.layers.Dense(10,activation='softmax') ]) MLP_4.compile( optimizer=keras.optimizers.Adam(lr), loss= 'categorical_crossentropy', metrics = ['accuracy'] ) History = MLP_4.fit(train_data[:10000],train_labels[:10000], batch_size = N_batch_size, epochs = N_epochs,validation_data=(test_data,test_labels), shuffle=False) train_acc = History.history['accuracy'] test_acc = History.history['val_accuracy']在该模型的每一层(包括输出层)都分别加入L1,L2正则项训练,分别汇报测试数据准确率

import numpy as np import tensorflow as tf from tensorflow import keras import matplotlib.pyplot as plt ## Let us define a plt function for simplicity def plt_loss(x,training_metric,testing_metric,ax,colors = ['b']): ax.plot(x,training_metric,'b',label = 'Train') ax.plot(x,testing_metric,'k',label = 'Test') ax.set_xlabel('Epochs') ax.set_ylabel('Accuarcy')# ax.set_ylabel('Categorical Crossentropy Loss') plt.legend() plt.grid() plt.show() tf.keras.utils.set_random_seed(1) ## We import the Minist Dataset using Keras.datasets (train_data, train_labels), (test_data, test_labels) = keras.datasets.mnist.load_data() ## We first vectorize the image (28*28) into a vector (784) train_data = train_data.reshape(train_data.shape[0],train_data.shape[1]*train_data.shape[2]) # 60000*784 test_data = test_data.reshape(test_data.shape[0],test_data.shape[1]*test_data.shape[2]) # 10000*784 ## We next change label number to a 10 dimensional vector, e.g., 1->[0,1,0,0,0,0,0,0,0,0] train_labels = keras.utils.to_categorical(train_labels,10) test_labels = keras.utils.to_categorical(test_labels,10) ## start to build a MLP model N_batch_size = 5000 N_epochs = 100 lr = 0.01 # ## we build a three layer model, 784 -> 64 -> 10 MLP_3 = keras.models.Sequential([ keras.layers.Dense(64, input_shape=(784,),activation='relu'), keras.layers.Dense(10,activation='softmax') ]) MLP_3.compile( optimizer=keras.optimizers.Adam(lr), loss= 'categorical_crossentropy', metrics = ['accuracy'] ) History = MLP_3.fit(train_data,train_labels, batch_size = N_batch_size, epochs = N_epochs,validation_data=(test_data,test_labels), shuffle=False) train_acc = History.history['accuracy'] test_acc = History.history['val_accuracy']模仿此段代码,写一个双隐层感知器(输入层784,第一隐层128,第二隐层64,输出层10)

import numpy as np import tensorflow as tf from tensorflow import keras import matplotlib.pyplot as plt Let us define a plt function for simplicity def plt_loss(x,training_metric,testing_metric,ax,colors = ['b']): ax.plot(x,training_metric,'b',label = 'Train') ax.plot(x,testing_metric,'k',label = 'Test') ax.set_xlabel('Epochs') ax.set_ylabel('Accuracy') plt.legend() plt.grid() plt.show() tf.keras.utils.set_random_seed(1) We import the Minist Dataset using Keras.datasets (train_data, train_labels), (test_data, test_labels) = keras.datasets.mnist.load_data() We first vectorize the image (28*28) into a vector (784) train_data = train_data.reshape(train_data.shape[0],train_data.shape[1]train_data.shape[2]) # 60000784 test_data = test_data.reshape(test_data.shape[0],test_data.shape[1]test_data.shape[2]) # 10000784 We next change label number to a 10 dimensional vector, e.g., 1-> train_labels = keras.utils.to_categorical(train_labels,10) test_labels = keras.utils.to_categorical(test_labels,10) start to build a MLP model N_batch_size = 5000 N_epochs = 100 lr = 0.01 we build a three layer model, 784 -> 64 -> 10 MLP_3 = keras.models.Sequential([ keras.layers.Dense(128, input_shape=(784,),activation='relu'), keras.layers.Dense(64, activation='relu'), keras.layers.Dense(10,activation='softmax') ]) MLP_3.compile( optimizer=keras.optimizers.Adam(lr), loss= 'categorical_crossentropy', metrics = ['accuracy'] ) History = MLP_3.fit(train_data,train_labels, batch_size = N_batch_size, epochs = N_epochs,validation_data=(test_data,test_labels), shuffle=False) train_acc = History.history['accuracy'] test_acc = History.history对于该模型,使用不同数量的训练数据(5000,10000,15000,…,60000,公差=5000的等差数列),绘制训练集和测试集准确率(纵轴)关于训练数据大小(横轴)的曲线

将下面代码使用ConvRNN2D层来替换ConvLSTM2D层,并在模块__init__.py中创建类‘convrnn’ class Model(): def __init__(self): self.img_seq_shape=(10,128,128,3) self.img_shape=(128,128,3) self.train_img=dataset # self.test_img=dataset_T patch = int(128 / 2 ** 4) self.disc_patch = (patch, patch, 1) self.optimizer=tf.keras.optimizers.Adam(learning_rate=0.001) self.build_generator=self.build_generator() self.build_discriminator=self.build_discriminator() self.build_discriminator.compile(loss='binary_crossentropy', optimizer=self.optimizer, metrics=['accuracy']) self.build_generator.compile(loss='binary_crossentropy', optimizer=self.optimizer) img_seq_A = Input(shape=(10,128,128,3)) #输入图片 img_B = Input(shape=self.img_shape) #目标图片 fake_B = self.build_generator(img_seq_A) #生成的伪目标图片 self.build_discriminator.trainable = False valid = self.build_discriminator([img_seq_A, fake_B]) self.combined = tf.keras.models.Model([img_seq_A, img_B], [valid, fake_B]) self.combined.compile(loss=['binary_crossentropy', 'mse'], loss_weights=[1, 100], optimizer=self.optimizer,metrics=['accuracy']) def build_generator(self): def res_net(inputs, filters): x = inputs net = conv2d(x, filters // 2, (1, 1), 1) net = conv2d(net, filters, (3, 3), 1) net = net + x # net=tf.keras.layers.LeakyReLU(0.2)(net) return net def conv2d(inputs, filters, kernel_size, strides): x = tf.keras.layers.Conv2D(filters, kernel_size, strides, 'same')(inputs) x = tf.keras.layers.BatchNormalization()(x) x = tf.keras.layers.LeakyReLU(alpha=0.2)(x) return x d0 = tf.keras.layers.Input(shape=(10, 128, 128, 3)) out= tf.keras.layers.ConvRNN2D(filters=32, kernel_size=3,padding='same')(d0) out=tf.keras.layers.Conv2D(3,1,1,'same')(out) return keras.Model(inputs=d0, outputs=out)

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