#模型搭建 model = Sequential() model.add(Conv1D(50,4,padding='same',activation='relu',input_shape=(p,1)))#50个filter卷积核 大小4 model.add(MaxPooling1D(2))#每两个取一个大的 数据会减少一半 model.add(Flatten())#把二维数据变成一维的 model.add(Dense(20))#20个神经元的全连接层 model.add(Dropout(0.2))#防止过拟合 20%权重冻结 model.add(Activation('relu')) model.add(Dense(1))#输出层 是一个一维的全连接神经网络 model.add(Activation('sigmoid')) #model.compile(loss='mse',optimizer=SGD(lr=0.2), metrics['accuracy']) model.compile(loss='mse', optimizer=SGD(lr=0.2)) model.summary()

这段代码是用Python语言编写的，使用了Keras深度学习框架来构建一个卷积神经网络模型。这个模型是用来解决二分类问题的。第一个层是一个卷积层，使用50个大小为4的卷积核。接着是一个池化层，每两个数据取一个较大的数据。然后是一个展平层，把二维的数据变成一维的。接下来是一个具有20个神经元的全连接层，然后是一个20%权重冻结的dropout层，以防止过拟合。然后再加一个激活函数为relu的全连接层，最后是一个输出层，也是一个全连接的神经网络，使用sigmoid激活函数。这个模型的损失函数是mse（均方误差），优化器是随机梯度下降法，学习率为0.2。

相关问题

帮我用pytorch改写：def make_generator_model(): model = tf.keras.Sequential() model.add(layers.Input(shape=(100, 12))) model.add(layers.Bidirectional(layers.LSTM(64, return_sequences=True))) model.add(layers.Conv1D(filters=128, kernel_size=16, strides=1, padding='same')) model.add(layers.LeakyReLU()) model.add(layers.Conv1D(filters=64, kernel_size=16, strides=1, padding='same')) model.add(layers.LeakyReLU()) model.add(layers.UpSampling1D(2)) model.add(layers.Conv1D(filters=32, kernel_size=16, strides=1, padding='same')) model.add(layers.LeakyReLU()) model.add(layers.Conv1D(filters=16, kernel_size=16, strides=1, padding='same')) model.add(layers.LeakyReLU()) model.add(layers.UpSampling1D(2)) model.add(layers.Conv1D(filters=1, kernel_size=16, strides=1, padding='same', activation='tanh')) model.add(layers.Permute((2, 1))) return model def make_discriminator_model(): model = tf.keras.Sequential() model.add(layers.Input(shape=(1, 400))) model.add(layers.Permute((2, 1))) model.add(layers.Conv1D(filters=32, kernel_size=16, strides=1, padding='same')) model.add(layers.LeakyReLU()) # model.add(layers.Dropout(0.4)) model.add(layers.Conv1D(filters=64, kernel_size=16, strides=1, padding='same')) model.add(layers.LeakyReLU()) model.add(layers.MaxPool1D(pool_size=2)) model.add(layers.Conv1D(filters=128, kernel_size=16, strides=1, padding='same')) model.add(layers.LeakyReLU()) # model.add(layers.Dropout(0.4)) model.add(layers.Conv1D(filters=256, kernel_size=16, strides=1, padding='same')) model.add(layers.LeakyReLU()) model.add(layers.MaxPool1D(pool_size=2)) model.add(layers.Flatten()) model.add(layers.Dense(1)) return model

以下是使用PyTorch重写的make_generator_model和make_discriminator_model函数：

import torch.nn as nn

def make_generator_model():
    model = nn.Sequential(
        nn.LSTM(12, 64, bidirectional=True, batch_first=True),
        nn.Conv1d(128, 128, kernel_size=16, stride=1, padding=8),
        nn.LeakyReLU(),
        nn.Conv1d(64, 64, kernel_size=16, stride=1, padding=8),
        nn.LeakyReLU(),
        nn.Upsample(scale_factor=2),
        nn.Conv1d(32, 32, kernel_size=16, stride=1, padding=8),
        nn.LeakyReLU(),
        nn.Conv1d(16, 16, kernel_size=16, stride=1, padding=8),
        nn.LeakyReLU(),
        nn.Upsample(scale_factor=2),
        nn.Conv1d(1, 1, kernel_size=16, stride=1, padding=8),
        nn.Tanh(),
        nn.Permute((0, 2, 1))
    )
    return model

def make_discriminator_model():
    model = nn.Sequential(
        nn.Conv1d(400, 32, kernel_size=16, stride=1, padding=8),
        nn.LeakyReLU(),
        nn.Conv1d(32, 64, kernel_size=16, stride=1, padding=8),
        nn.LeakyReLU(),
        nn.MaxPool1d(kernel_size=2),
        nn.Conv1d(64, 128, kernel_size=16, stride=1, padding=8),
        nn.LeakyReLU(),
        nn.Conv1d(128, 256, kernel_size=16, stride=1, padding=8),
        nn.LeakyReLU(),
        nn.MaxPool1d(kernel_size=2),
        nn.Flatten(),
        nn.Linear(256 * 25, 1)
    )
    return model

请注意，这里使用了PyTorch中的模块替换了TensorFlow中的模块。在PyTorch中，nn.LSTM和nn.Conv1d的默认输入格式是(batch_size, seq_len, input_size)和(batch_size, input_channels, seq_len)。另外，使用nn.Linear替换了最后的全连接层。

import numpy as np import pandas as pd from keras.models import Sequential from keras.layers import Conv1D, MaxPooling1D, Dense, Flatten # 加载数据 data = pd.read_csv('3c_left_1-6.csv') # 将数据转换为三维时序信号 x = data.iloc[:, 0:3].values x = x.reshape(x.shape[0], x.shape[1], 1) # 添加噪声 noise = np.random.normal(0, 1, x.shape) x_noise = x + noise # 构建模型 model = Sequential() model.add(Conv1D(32, kernel_size=3, activation='relu', input_shape=(3, 1))) model.add(MaxPooling1D(pool_size=2)) model.add(Conv1D(64, kernel_size=3, activation='relu')) model.add(MaxPooling1D(pool_size=2)) model.add(Flatten()) model.add(Dense(128, activation='relu')) model.add(Dense(3)) # 编译模型 model.compile(loss='mse', optimizer='adam') # 训练模型 model.fit(x_noise, x, epochs=50, batch_size=32) # 预测结果 x_pred = model.predict(x_noise) # 计算SNR、MSE、PSNR snr = 10 * np.log10(np.sum(x ** 2) / np.sum((x - x_pred) ** 2)) mse = np.mean((x - x_pred) ** 2) psnr = 10 * np.log10((np.max(x) ** 2) / mse) # 保存结果 result = pd.DataFrame({'SNR': [snr], 'MSE': [mse], 'PSNR': [psnr]}) result.to_csv('result.csv', index=False) 报错为File "G:\project2\gaussian.py", line 20, in <module> model.add(MaxPooling1D(pool_size=2))ValueError: Negative dimension size caused by subtracting 2 from 1 for 'max_pooling1d_1/MaxPool' (op: 'MaxPool') with input shapes: [?,1,1,32].

这个错误是因为在添加第一个池化层后，输出张量的空间维度被缩小到了1，而在添加第二个池化层时，池化窗口大小为2，会导致输出张量的空间维度变成负数。解决方法是将第一个池化层的池化窗口大小改为1或者不使用池化层。修改代码如下：

import numpy as np
import pandas as pd
from keras.models import Sequential
from keras.layers import Conv1D, MaxPooling1D, Dense, Flatten

# 加载数据
data = pd.read_csv('3c_left_1-6.csv')

# 将数据转换为三维时序信号
x = data.iloc[:, 0:3].values
x = x.reshape(x.shape[0], x.shape[1], 1)

# 添加噪声
noise = np.random.normal(0, 1, x.shape)
x_noise = x + noise

# 构建模型
model = Sequential()
model.add(Conv1D(32, kernel_size=3, activation='relu', input_shape=(3, 1)))
model.add(Conv1D(64, kernel_size=3, activation='relu'))
model.add(Flatten())
model.add(Dense(128, activation='relu'))
model.add(Dense(3))

# 编译模型
model.compile(loss='mse', optimizer='adam')

# 训练模型
model.fit(x_noise, x, epochs=50, batch_size=32)

# 预测结果
x_pred = model.predict(x_noise)

# 计算SNR、MSE、PSNR
snr = 10 * np.log10(np.sum(x ** 2) / np.sum((x - x_pred) ** 2))
mse = np.mean((x - x_pred) ** 2)
psnr = 10 * np.log10((np.max(x) ** 2) / mse)

# 保存结果
result = pd.DataFrame({'SNR': [snr], 'MSE': [mse], 'PSNR': [psnr]})
result.to_csv('result.csv', index=False)