Contains code for the NeurIPS 2021 paper by Khan and Swaroop, "Knowledge-Adaptation Priors".

Knowledge-adaptation priors (K-priors) reduce the cost of retraining by enabling quick and accurate adaptation for a wide-variety of tasks and models. This is made possible by a combination of weight and function-space priors to reconstruct the gradients of the past.

The main file is main.py, which can be run with various options.

• The four different adaptation tasks can be changed by using the input variable adaptation_task, which can be set to one of 'add_data', 'remove_data', 'change_regulariser', 'change_model'.
• For Figure 1 (right) in the paper, use dataset='usps_binary', network_type='MLP' (this is the default).
• For Figure 2(a) in the paper, use dataset='adult', network_type='Linear'.
• For Figure 2(b) in the paper, use dataset='usps_binary', network_type='Linear'.

Figures are saved in the main directory by default. Change this using the path variable. (Use path=None to view figures using matplotlib's plt.show()).

The code was run with Python 3.7, PyTorch v1.7.1. For the full environment, see requirements.txt.

Hyperparameters are set at the top of the main.py file. The functional and weight regularisation is implemented as gradients in lbfgsreg.py and adamreg.py; alternatively (and equivalently), one could use autograd over the loss function (see paper for the loss function).

This code was written by Siddharth Swaroop (and the paper is joint work with Mohammad Emtiyaz Khan). Please raise issues here via github, or contact Siddharth.

@article{khan2021knowledge,
  title = {Knowledge-Adaptation Priors},
  author = {Khan, Mohammad Emtiyaz and Swaroop, Siddharth},
  journal = {Advances in Neural Information Processing Systems},
  year = {2021}
}