[Question] Need clarification on the bn_finalize and dbn_weight interfaces

[GeezYuven]

1. I found that both the provided bn_finalize interface and the dbn_weight interface involve returning some equivalent parameters, such as eq_scale, eq_bias, eq_scale_dy, eq_scale_x. How are these equivalent parameters calculated?

2. bn_finalize only provides an example for calculating statistics and does not include examples combining with other interfaces, such as genstats. Could you provide an example of combining bn_finalize with other interfaces to implement bn_training?

3. The dbn interface returns dx, dscale, and dbias, while dbn_weight separately returns dscale and dbias. What is the main use case for dbn_weight?