decentralization的首字母，单词翻译中文是去中心化，即DApp为去中心化应用。
因为DApp直接和区块链技术挂钩，和交易数据、交易资产有关联，和不可篡改去中心化存储有关联，所以随着区块链技术越来越成熟普及，DApp将越来越受重视，并更多地出现在各个生活场景中。
def safe_log(self, x):
""" Prevents :math:`log(0)` by using :math:`log(max(x, eps))`."""
return torch.log(torch.clamp(x, min=1e-6))
def forward(self, x):
# input shape (batch_size, C, T)
if len(x.shape) is not 4:
x = torch.unsqueeze(x, 1)
# input shape (batch_size, 1, C, T)
x = self.temp_conv(x)
x = self.spat_conv(x)
x = self.bn(x)
x = x*x # conv_activate
x = self.pooling(x)
x = self.safe_log(x) # pool_activate
x = self.dropout(x)
x = self.class_conv(x)
x= self.softmax(x)
out = torch.squeeze(x)
return out
