RuntimeError: Input type (torch.cuda.HalfTensor) and weight type (torch.FloatTensor)

将卷积运算放到初始化中，与模型初始化一块加载到cuda
原来代码：

class layer(nn.Module):
    '''
    x: input features with shape [N,C,H,W]
    gamma, b: parameters of mapping function
    '''
    def __init__(self):
        super(layer, self).__init__()
        self.avg_pool = nn.AdaptiveAvgPool2d(1)
        self.sigmoid = nn.Sigmoid()

    def forward(self, x, gamma=2, b=1):
        n,channel,h,w = x.size(<