def _to_tensor(self, datas): x = torch.LongTensor([_[0] for _ in datas]).to(self.device) y = torch.LongTensor([_[1] for _ in datas]).to(self.device) # pad前的长度(超过pad_size的设为pad_size) seq_len = torch.LongTensor([_[2] for _ in datas]).to(self.device) mask = torch.LongTensor([_[3] for _ in datas]).to(self.device) return (x, seq_len, mask), y
时间: 2024-04-28 16:25:38 浏览: 16
这段代码是将输入数据转换成 PyTorch Tensor 的形式,其中包括输入数据的序列(x)、序列的长度(seq_len)、mask矩阵(mask)和标签(y)。具体来说,该函数的输入是一个数据集 datas,其中每个数据点由四个元素组成,分别是输入序列、标签、序列长度和 mask 矩阵。函数返回的是一个元组,其中第一个元素是一个元组,包括转换后的输入序列、序列长度和 mask 矩阵,第二个元素是转换后的标签。这个函数用于将数据集转换成神经网络模型可以处理的形式。
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def _to_tensor(self, datas): x = torch.LongTensor([_[0] for _ in datas]).to(self.device) y = torch.LongTensor([_[1] for _ in datas]).to(self.device) # pad前的长度(超过pad_size的设为pad_size) seq_len = torch.LongTensor([_[2] for _ in datas]).to(self.device) return (x, seq_len), y
这段代码定义了一个 `_to_tensor` 函数,用于将一个批次的数据转换成 PyTorch 张量。该函数的输入参数是一个数据列表,其中每个元素为一个三元组,分别表示一个文本序列、其对应的标签和序列的长度。该函数首先将每个样本的文本序列和标签分别提取出来,转换成长整型张量,并将其放到指定的设备上。接着,它将每个样本的序列长度提取出来,转换成长整型张量,并将其放到指定的设备上。最后,该函数将文本序列张量、序列长度张量和标签张量打包成一个元组并返回。
class Partial_conv3(nn.Module): def __init__(self, dim, n_div, forward): super().__init__() self.dim_conv3 = dim // n_div self.dim_untouched = dim - self.dim_conv3 self.partial_conv3 = nn.Conv2d(self.dim_conv3, self.dim_conv3, 3, 1, 1, bias=False) if forward == 'slicing': self.forward = self.forward_slicing elif forward == 'split_cat': self.forward = self.forward_split_cat else: raise NotImplementedError def forward_slicing(self, x: Tensor) -> Tensor: # only for inference x = x.clone() # !!! Keep the original input intact for the residual connection later x[:, :self.dim_conv3, :, :] = self.partial_conv3(x[:, :self.dim_conv3, :, :]) return x def forward_split_cat(self, x: Tensor) -> Tensor: x1, x2 = torch.split(x, [self.dim_conv3, self.dim_untouched], dim=1) x1 = self.partial_conv3(x1) x = torch.cat((x1, x2), 1) return x 在这段代码中插入全局平均池化做通道增强的模块
可以将全局平均池化放在每个 forward 函数的最后,对每个 channel 进行平均池化操作,然后将结果与未被改变的 channel 拼接起来,得到增强后的输出。修改后的代码如下:
```
class Partial_conv3(nn.Module):
def __init__(self, dim, n_div, forward):
super().__init__()
self.dim_conv3 = dim // n_div
self.dim_untouched = dim - self.dim_conv3
self.partial_conv3 = nn.Conv2d(self.dim_conv3, self.dim_conv3, 3, 1, 1, bias=False)
self.global_avg_pool = nn.AdaptiveAvgPool2d((1, 1)) # 添加全局平均池化层
if forward == 'slicing':
self.forward = self.forward_slicing
elif forward == 'split_cat':
self.forward = self.forward_split_cat
else:
raise NotImplementedError
def forward_slicing(self, x: Tensor) -> Tensor:
# only for inference
x = x.clone() # !!! Keep the original input intact for the residual connection later
x[:, :self.dim_conv3, :, :] = self.partial_conv3(x[:, :self.dim_conv3, :, :])
x[:, :self.dim_conv3, :, :] = self.global_avg_pool(x[:, :self.dim_conv3, :, :]) # 添加全局平均池化
x = torch.cat((x, x[:, self.dim_conv3:, :, :]), 1)
return x
def forward_split_cat(self, x: Tensor) -> Tensor:
x1, x2 = torch.split(x, [self.dim_conv3, self.dim_untouched], dim=1)
x1 = self.partial_conv3(x1)
x1 = self.global_avg_pool(x1) # 添加全局平均池化
x = torch.cat((x1, x2), 1)
return x
```