Hanfei Sun

Results 14 issues of Hanfei Sun

- [x] strong pair vs soft pair- - [x] pretrained vs non-pretrained & L2_loss - [x] encoder_freeze vs encoder_not_freeze - [ ] softpair+ vs softpair- vs no pair

Currently the input_function is strong paired. We need to support: 1. soft pair 2. no pair

good first issue