卷积层
此卷积非彼卷积，实际上为二维信号的互相关运算，使用scipy.signal.correlate(x, kernel, ‘valid’)进行运算
from util_pkg import *
from scipy import signal
import torch
from torch import nn
class Conv2D(nn.Module):
def __init__(self, kernel_size):
super().__init__()
self.kernel = nn.Parameter(torch.randn(kernel
