关于全连接层Backward部分中(141~165行代码)weight的求导问题

https://github.com/happynear/caffe-windows/blob/2e9ade3075d86321342966ed0aa2961031a06daf/src/caffe/layers/inner_product_layer.cpp#L141-L165
@happynear 你好，既然在Forward中weight进行了归一化：Y=WX/||W||，那么在Backward中weight的导数计算方式怎么跟没有进行归一化(Y=WX)时一样，都是bottom_data*top_diff (for transpose top_diff )或者top_diff *bottom_data(for no transpose top_diff)，这样计算是为了工程上处理方便，还是有别的特殊考虑？？