def forward(self, x_low, x_up):
    x_low = self.up(F.interpolate(x_low, x_up.shape[2:], mode='bilinear', align_corners=False))
    return self.cat_conv(torch.cat((x_up, x_low), 1))
def forward(self, x_low, x_up):
    x_low = self.up(F.interpolate(x_low, x_up.shape[2:], mode='bilinear', align_corners=False))
    return self.cat_conv(torch.cat((x_up, x_low), 1))