def accumulate_gradients(opts, lr, batchSize, net, res, mmap=None):
for l in range(len(net['layers']) - 1, -1, -1):
if res['dzdw'][l] is not None:
if 'learningRate' not in net['layers'][l]:
net['layers'][l]['learningRate'] = 1
else:
pass
if 'weightDecay' not in net['layers'][l]:
net['layers'][l]['weightDecay'] = 1
else:
pass
thisLR = lr * net['layers'][l]['learningRate']
if 'weight' in net['layers'][l]:
if net['layers'][l]['type'] == 'bfc':
W1 = net['layers'][l]['weight']
W1grad = (1. / batchSize) * res['dzdw'][l]
manifold = Stiefel(W1.shape[0], W1.shape[1])
W1Rgrad = manifold.egrad2rgrad(W1, W1grad)
net['layers'][l]['weight'] = manifold.retr(
W1, -thisLR * W1Rgrad)
else:
net['layers'][l]['weight'] = net['layers'][l][
'weight'] - thisLR * (1. / batchSize) * res['dzdw'][l]
else:
pass
return net, res
