您好，想问一下程序中出现的if l < oriweight.size(1) * oriweight.size(2) * oriweight.size(3)是什么意思？

[coldlarry]

在sketch_cifar程序中出现了if l < oriweight.size(1) * oriweight.size(2) * oriweight.size(3) and j==0，我不知道设置if l < oriweight.size(1) * oriweight.size(2) * oriweight.size(3)的目的是什么？包括设置的参数is_preserve，也不明白。很希望您能解答，谢谢您。

[lmbxmu]

1、进行SVD时，矩阵的行数要小于列数，这里l代表矩阵的行数，oriweight.size(1) * oriweight.size(2) * oriweight.size(3)就是代表矩阵的列数，所以要求满足 l < oriweight.size(1) * oriweight.size(2) * oriweight.size(3)这个条件才进行sketch

2、is_preserve表示本层通道数量是否需要发生变化，若前面一层进行了sketch后卷积核数量减少，那本层卷积层的通道数量也要发生对应发生变化，则is_preserve为False，反之is_preserve为True