def block1(x, filters, kernel_size=3, stride=1, conv_shortcut=True, name=None): """A residual block. Arguments: x: input tensor. filters: integer, filters of the bottleneck layer. kernel_size: default 3, kernel size of the bottleneck layer. stride: default 1, stride of the first layer. conv_shortcut: default True, use convolution shortcut if True, otherwise identity shortcut. name: string, block label. Returns: Output tensor for the residual block. """ bn_axis = 3 if backend.image_data_format() == 'channels_last' else 1 if conv_shortcut: shortcut = layers.Conv2D( 4 * filters, 1, strides=stride, name=name + '_0_conv')(x) shortcut = layers.BatchNormalization( axis=bn_axis, epsilon=1.001e-5, name=name + '_0_bn')(shortcut) else: shortcut = x #第一个卷积结构 x = layers.Conv2D(filters, 1, strides=stride, name=name + '_1_conv')(x) x = layers.BatchNormalization( axis=bn_axis, epsilon=1.001e-5, name=name + '_1_bn')(x) x = layers.Activation('relu', name=name + '_1_relu')(x) #第二个卷积结构 x = layers.Conv2D( filters, kernel_size, padding='SAME', name=name + '_2_conv')(x) x = layers.BatchNormalization( axis=bn_axis, epsilon=1.001e-5, name=name + '_2_bn')(x) x = layers.Activation('relu', name=name + '_2_relu')(x) #第三个卷积结构 x = layers.Conv2D(4 * filters, 1, name=name + '_3_conv')(x) x = layers.BatchNormalization( axis=bn_axis, epsilon=1.001e-5, name=name + '_3_bn')(x) x = layers.Add(name=name + '_add')([shortcut, x]) x = layers.Activation('relu', name=name + '_out')(x) return x def stack1(x, filters, blocks, stride1=2, name=None): """A set of stacked residual blocks. Arguments: x: input tensor. filters: integer, filters of the bottleneck layer in a block. blocks: integer, blocks in the stacked blocks. stride1: default 2, stride of the first layer in the first block. name: string, stack label. Returns: Output tensor for the stacked blocks. """ x = block1(x, filters, stride=stride1, name=name + '_block1') for i in range(2, blocks + 1): x = block1(x, filters, conv_shortcut=False, name=name + '_block' + str(i)) return x

这是一个用于构建深度残差网络（ResNet）的函数，包含了两个子函数：block1和stack1。其中block1是一个残差块，stack1是一组堆叠的残差块。在ResNet中，每个残差块由三个卷积层组成，其中第一个卷积层可以使用1x1卷积进行下采样，第三个卷积层的输出通道数是第二个卷积层的四倍。每个残差块的输出是输入和最后一个卷积层的输出的和，并经过ReLU激活函数。stack1函数调用block1函数构建一个堆叠的残差块，可以使用stride1参数指定第一个残差块的下采样步长。

相关问题

class Net(nn.Module): def __init__(self): super(Net, self).__init__() self.conv1 = nn.Conv1d(in_channels=1, out_channels=64, kernel_size=32, stride=8, padding=12) self.pool1 = nn.MaxPool1d(kernel_size=2, stride=2) self.BN = nn.BatchNorm1d(num_features=64) self.conv3_1 = nn.Conv1d(in_channels=64, out_channels=64, kernel_size=3, stride=1, padding=1) self.pool3_1 = nn.MaxPool1d(kernel_size=2, stride=2) self.conv3_2 = nn.Conv1d(in_channels=64, out_channels=128, kernel_size=3, stride=1, padding=1) self.pool3_2 = nn.MaxPool1d(kernel_size=2, stride=2) self.conv3_3 = nn.Conv1d(in_channels=128, out_channels=256, kernel_size=3, stride=1, padding=1) self.pool3_3 = nn.MaxPool1d(kernel_size=2, stride=2) self.conv5_1 = nn.Conv1d(in_channels=64, out_channels=64, kernel_size=5, stride=1, padding=2) self.pool5_1 = nn.MaxPool1d(kernel_size=2, stride=2) self.conv5_2 = nn.Conv1d(in_channels=64, out_channels=128, kernel_size=5, stride=1, padding=2) self.pool5_2 = nn.MaxPool1d(kernel_size=2, stride=2) self.conv5_3 = nn.Conv1d(in_channels=128, out_channels=256, kernel_size=5, stride=1, padding=2) self.pool5_3 = nn.MaxPool1d(kernel_size=2, stride=2) self.conv7_1 = nn.Conv1d(in_channels=64, out_channels=64, kernel_size=7, stride=1, padding=3) self.pool7_1 = nn.MaxPool1d(kernel_size=2, stride=2) self.conv7_2 = nn.Conv1d(in_channels=64, out_channels=128, kernel_size=7, stride=1, padding=3) self.pool7_2 = nn.MaxPool1d(kernel_size=2, stride=2) self.conv7_3 = nn.Conv1d(in_channels=128, out_channels=256, kernel_size=7, stride=1, padding=3) self.pool7_3 = nn.MaxPool1d(kernel_size=2, stride=2) self.pool2 = nn.MaxPool1d(kernel_size=8, stride=1) self.fc = nn.Linear(in_features=256 * 3, out_features=4) ##这里的256*3是计算出来的 self.softmax = nn.Softmax()，解释各部分的作用和参数选择

这段代码定义了一个名为Net的类，继承了nn.Module类。在初始化函数中，它定义了多个一维卷积层(nn.Conv1d)、最大池化层(nn.MaxPool1d)、BN层(nn.BatchNorm1d)和全连接层(nn.Linear)。这些层用于构建神经网络模型。其中，卷积层、池化层和BN层用于特征提取，全连接层用于分类。此模型的输入是一个通道的一维数据，输出是四个类别的概率分布。

代码为import torch import torch.nn as nn class STAE(nn.Module): def __init__(self): super(STAE, self).__init__() self.c1 = nn.Sequential( nn.Conv1d(1, 64, kernel_size=3, stride=1, padding=1), nn.BatchNorm1d(64), nn.MaxPool1d(kernel_size=2, stride=2), nn.Conv1d(64, 128, kernel_size=3, stride=1, padding=1), nn.BatchNorm1d(128), nn.MaxPool1d(kernel_size=2, stride=2), nn.Conv1d(128, 128, kernel_size=3, stride=1, padding=1), nn.BatchNorm1d(128), nn.MaxPool1d(kernel_size=2, stride=2), nn.Conv1d(128, 256, kernel_size=3, stride=1, padding=0), nn.BatchNorm1d(256), nn.MaxPool1d(kernel_size=2, stride=2), nn.Conv1d(256, 256, kernel_size=3, stride=1, padding=1), nn.BatchNorm1d(256), nn.MaxPool1d(kernel_size=2, stride=2), )#31*256 长*通道数（原先1000*1） self.r1 = nn.Sequential( nn.LSTM(input_size=30, hidden_size=64, batch_first=True), ) self.l1 = nn.Linear(64, 1) def forward(self,x): x=self.c1(x) x=self.r1(x) return x if __name__ == '__main__': a=torch.ones(1,1,1000) net=STAE() output=net(a) print(torch.Size(a))。代码出错Traceback (most recent call last): File "D:\Program Files\JetBrains\PyCharm 2023.1\PycharmProject\test\STAE.py", line 38, in <module> print(torch.Size(a)) TypeError: torch.Size() takes an iterable of 'int' (item 0 is 'Tensor')。请问如何修改

你需要修改代码中的print(torch.Size(a))这行代码，将其修改为print(a.size())即可。因为torch.Size()函数需要传入一个整数类型的可迭代对象，而a是一个Tensor类型的对象，所以会抛出TypeError异常。而a.size()函数可以直接返回a的形状信息，是一个torch.Size类型的对象，可以直接打印输出。