how network actually work?

[anitach2003]

Hi I am pretty new at this area and I have some question

1.after running in clrhead we have this (prior_embeddings): Embedding(192, 3) (seg_decoder): SegDecoder( (dropout): Dropout2d(p=0.1, inplace=False) (conv): Conv2d(192, 5, kernel_size=(1, 1), stride=(1, 1)) ) where the output of conv will go and whats Embedding mean in this area 2.after that we have reg_modules and cls_modules.this happen after roigather or not and is it give output to roighater? 3.now we have roi_gather.does f_key get the out put of fpn_convs for each layer,what is the input for ROIgather? 4.what is f_query and f_value and W input and output? 5.what is the refined shape ? 6.what is identity mean in network architecture