This reverts commit c1b943fb.

* fix set bug

* refine 960 to 640

* fix details

* add epoch num

* add rep export

* use db head

* update for multi scale

* update for multi scale

* update for multi scale

* rm notes

* add ppocrv4 det student and teacher model

* update head and config, refine details

* refine config and head details

* refine config and head details

* refine details

* refine details

* remove application

* refine fpn

* fix bug

* update code

* fix bug

* align lcnet to rec

* align hgnet to rec

* refine make shrink

* remove theseus layer

* add ppocrv3 rec

* fix data to support offline augment

* fix doc

* fix data