These are high order networks using the high order layers defined in the repo here. This is an unfinished experiment where I'm trying to get the resnet performance using high order layers to at least match the standard approach. So far fourier series layers do decent, I can also get results with piecewise polynomial layers - random constant initialization seems to be key vs kaiming which introduces too much oscillation to begin with. However, I can rapidly get perfect accuracy on the training set with quadratic or higher (either piecewise or non-piecewsie polynomials), I believe I should actually be trying a much smaller model than resnet10 since the high order networks should require far fewer parameters. Alternatively, try this with a much larger dataset.
In this repo there is a "rescale_planes" factor. This is used because the conv layers are expanded by the high order approach to include multiple weights per channel. A discontinuous conv would be scaled by channels=segmentsnodes_per_segmentoriginal_num_channels so in this case you should divide channels by (segments*nodes_per_segment) to get the same number of parameters. For polynomial you would divide by "nodes_per_segment" since there is only one node and for continuous it would be approximately (node_per_segement-1)*segments
It seems the important thing is random constant initialization, normalization - I'm using infinity norm which probably isn't the best but I like because it keeps values in the correct range for polynomial problems and then lion. I'm getting overfitting except the linear case which is slow to converge. Non-linearity is introduced by the normalization so they do much better than I expected (but not well aware with cifar100 training). Piecewise polynomial training is much slower than polynomial so I need to speed up the algorithm.
resnet converted from torchvision.
The following examples use transformed torchvision resnet(s) using high order layers.
After 100 epochs with command
python examples/cifar100.py max_epochs=100 train_fraction=1.0 layer_type=standard segments=1 n=3 batch_size=128 gradient_clip_val=0.0 learning_rate=1e-3 scale=4.0 model_name=resnet18 loss=cross_entropy{'test_acc': tensor(0.4682, device='cuda:0'),
'test_acc5': tensor(0.7399, device='cuda:0'),
'test_loss': tensor(4.0737, device='cuda:0'),
'train_acc': tensor(0.9531, device='cuda:0'),
'train_acc5': tensor(1., device='cuda:0'),
'train_loss': tensor(0.1139, device='cuda:0'),
'val_acc': tensor(0.4421, device='cuda:0'),
'val_acc5': tensor(0.7128, device='cuda:0'),
'val_loss': tensor(4.0639, device='cuda:0')}python examples/cifar100.py max_epochs=1000 train_fraction=1.0 layer_type=polynomial2d n=3 batch_size=1024 gradient_clip_val=0.0 learning_rate=1e-4 scale=2 rescale_planes=3 layer_by_layer=False optimizer=lion model_name=resnet10with test results, the training top5 is basically 100% accurate. Highly overfit.
[{'test_loss': 33.931854248046875, 'test_acc': 0.28209999203681946, 'test_acc1': 0.28209999203681946, 'test_acc5': 0.49720001220703125}]
python examples/cifar100.py max_epochs=20 train_fraction=1.0 layer_type=polynomial2d n=4 batch_size=1024 gradient_clip_val=0.0 learning_rate=1e-4 scale=8 model_name=resnet10 layer_by_layer=False optimizer=lionpython examples/cifar100.py max_epochs=20 train_fraction=1.0 layer_type=polynomial2d n=4 batch_size=128 gradient_clip_val=0.0 learning_rate=1e-4 scale=10 model_name=resnet18 layer_by_layer=FalseLinear case with n=2 on resnet10
python examples/cifar100.py max_epochs=1000 train_fraction=1.0 layer_type=polynomial2d n=2 batch_size=1024 gradient_clip_val=0.0 learning_rate=1e-4 scale=6 layer_by_layer=False optimizer=lion
with results
[{'test_loss': 2.6638987064361572, 'test_acc': 0.3310000002384186, 'test_acc1': 0.3310000002384186, 'test_acc5': 0.6402000188827515}]
with resnet18 using linear
python examples/cifar100.py max_epochs=1000 train_fraction=1.0 layer_type=polynomial2d n=2 batch_size=1024 gradient_clip_val=0.0 learning_rate=1e-4 scale=2 layer_by_layer=False optimizer=lion model_name=resnet18
and results (all using maxabs normalization - infinity norm noramlization)
[{'test_loss': 2.2048048973083496, 'test_acc': 0.4456000030040741, 'test_acc1': 0.4456000030040741, 'test_acc5': 0.7317000031471252}]
python examples/cifar100.py max_epochs=100 train_fraction=1.0 layer_type=fourier2d segments=1 n=3 batch_size=128 gradient_clip_val=0.0 learning_rate=1e-3 scale=4.0 model_name=resnet10 loss=cross_entropy layer_by_layer=Falsewith accuracy (100 epochs)
{'test_acc': tensor(0.4245, device='cuda:0'),
'test_acc5': tensor(0.6917, device='cuda:0'),
'test_loss': tensor(4.8819, device='cuda:0'),
'train_acc': tensor(0.9688, device='cuda:0'),
'train_acc5': tensor(1., device='cuda:0'),
'train_loss': tensor(0.0680, device='cuda:0'),
'val_acc': tensor(0.4036, device='cuda:0'),
'val_acc5': tensor(0.6721, device='cuda:0'),
'val_loss': tensor(5.0824, device='cuda:0')}python examples/cifar100.py max_epochs=100 train_fraction=1.0 layer_type=fourier2d segments=1 n=2 batch_size=128 gradient_clip_val=0.0 learning_rate=1e-3 scale=4.0 model_name=resnet18 loss=cross_entropy layer_by_layer=False{'test_acc': tensor(0.4308, device='cuda:0'),
'test_acc5': tensor(0.7070, device='cuda:0'),
'test_loss': tensor(3.9088, device='cuda:0'),
'train_acc': tensor(0.8906, device='cuda:0'),
'train_acc5': tensor(1., device='cuda:0'),
'train_loss': tensor(0.2658, device='cuda:0'),
'val_acc': tensor(0.4050, device='cuda:0'),
'val_acc5': tensor(0.6857, device='cuda:0'),
'val_loss': tensor(4.0993, device='cuda:0')}Simple polynomial convolutional layers
python examples/cifar100.py -m max_epochs=100 train_fraction=1.0 layer_type=continuous2d segments=2 n=3 batch_size=128 gradient_clip_val=1.0 learning_rate=1e-3 scale=2.0 model_name=resnet10 loss=cross_entropy rescale_planes=1 rescale_output=True layer_by_layer=False{'test_acc': tensor(0.3771, device='cuda:0'),
'test_acc5': tensor(0.6626, device='cuda:0'),
'test_loss': tensor(3.8744, device='cuda:0'),
'train_acc': tensor(0.6719, device='cuda:0'),
'train_acc5': tensor(0.9219, device='cuda:0'),
'train_loss': tensor(0.9543, device='cuda:0'),
'val_acc': tensor(0.3647, device='cuda:0'),
'val_acc5': tensor(0.6532, device='cuda:0'),
'val_loss': tensor(3.4837, device='cuda:0')}Couple years later, no clipping using constant initialization First result is with similar number of parameters (using )
python examples/cifar100.py max_epochs=100 train_fraction=1.0 layer_type=continuous2d segments=2 n=3 batch_size=1024 gradient_clip_val=0.0 learning_rate=1e-4 scale=2.0 model_name=resnet10 loss=cross_entropy rescale_planes=6 layer_by_layer=False optimizer=lion
with results
[{'test_loss': 3.1842660903930664, 'test_acc': 0.29260000586509705, 'test_acc1': 0.29260000586509705, 'test_acc5': 0.5756999850273132}]
then
python examples/cifar100.py max_epochs=100 train_fraction=1.0 layer_type=continuous2d segments=2 n=3 batch_size=1024 gradient_clip_val=0.0 learning_rate=1e-5 scale=2.0 model_name=resnet10 loss=cross_entropy rescale_planes=1 layer_by_layer=False optimizer=lion
results
result [{'test_loss': 4.571002006530762, 'test_acc': 0.34369999170303345, 'test_acc1': 0.34369999170303345, 'test_acc5': 0.6175000071525574}]
and with a resnet18
python examples/cifar100.py max_epochs=100 train_fraction=1.0 layer_type=continuous2d segments=2 n=3 batch_size=1024 gradient_clip_val=0.0 learning_rate=1e-5 scale=2.0 model_name=resnet18 loss=cross_entropy rescale_planes=1 layer_by_layer=False optimizer=lion
with result
[{'test_loss': 4.950081825256348, 'test_acc': 0.29280000925064087, 'test_acc1': 0.29280000925064087, 'test_acc5': 0.5515000224113464}]
the larger network resnet18 overfits faster than the smaller network (better training score with lower generalization), not surprising resnet18 rescaling the planes, much smaller model for similar accuracy
python examples/cifar100.py max_epochs=200 train_fraction=1.0 layer_type=continuous2d segments=2 n=3 batch_size=1024 gradient_clip_val=0.0 learning_rate=1e-4 scale=2.0 model_name=resnet18 loss=cross_entropy rescale_planes=6 layer_by_layer=False optimizer=lion
results
[{'test_loss': 3.898888349533081, 'test_acc': 0.2802000045776367, 'test_acc1': 0.2802000045776367, 'test_acc5': 0.5493000149726868}]
resnet10 rescaled planes to have similar parameters as regular resnet18
python examples/cifar100.py max_epochs=1000 train_fraction=1.0 layer_type=polynomial2d n=3 batch_size=1024 gradient_clip_val=0.0 learning_rate=1e-4 scale=2 rescale_planes=3 layer_by_layer=False optimizer=lion model_name=resnet10
results
[{'test_loss': 9.258798599243164, 'test_acc': 0.27320000529289246, 'test_acc1': 0.27320000529289246, 'test_acc5': 0.5256999731063843}]
python cifar100.py -m max_epochs=100 train_fraction=1.0 layer_type=discontinuous2d segments=2 n=3 batch_size=128 gradient_clip_val=0.0 learning_rate=1e-3 scale=2.0 model_name=resnet10 loss=cross_entropy rescale_planes=3 rescale_output=True layer_by_layer=False{'test_acc': tensor(0.3587, device='cuda:0'),
'test_acc5': tensor(0.6414, device='cuda:0'),
'test_loss': tensor(4.0509, device='cuda:0'),
'train_acc': tensor(0.7031, device='cuda:0'),
'train_acc5': tensor(0.9375, device='cuda:0'),
'train_loss': tensor(1.0352, device='cuda:0'),
'val_acc': tensor(0.3462, device='cuda:0'),
'val_acc5': tensor(0.6307, device='cuda:0'),
'val_loss': tensor(3.7229, device='cuda:0')}model_name is "simple"
python cifar100.py -m max_epochs=60 train_fraction=1.0 layer_type=polynomial2d segments=1 n=6 batch_size=128 gradient_clip_val=0.0 learning_rate=1e-3 scale=4.0 model_name=simple loss=cross_entropy rescale_planes=2 rescale_output=True layer_by_layer=True epochs_per_layer=20
Train
python wikitext_transformer.py fraction=1.0
predict
python wikitext_predict.py path=~/high-order-networks-pytorch/outputs/2021-02-14/15-09-33/lightning_logs/version_0 text="A bit of text"
best parameters with resnet10
Best parameters: layer_type=continuous segments=2 n=2 optimizer=adahessian gradient_clip_val=1 max_epochs=20
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