diff options
Diffstat (limited to 'cchlstm.py')
| -rw-r--r-- | cchlstm.py | 40 |
1 files changed, 27 insertions, 13 deletions
@@ -2,6 +2,8 @@ import theano from theano import tensor import numpy +from theano.tensor.shared_randomstreams import RandomStreams + from blocks.algorithms import Momentum, AdaDelta, RMSProp from blocks.bricks import Tanh, Softmax, Linear, MLP, Initializable from blocks.bricks.lookup import LookupTable @@ -12,19 +14,22 @@ from blocks.filter import VariableFilter from blocks.roles import WEIGHT from blocks.graph import ComputationGraph, apply_noise, apply_dropout +rng = RandomStreams() + # An epoch will be composed of 'num_seqs' sequences of len 'seq_len' # divided in chunks of lengh 'seq_div_size' -num_seqs = 10 +num_seqs = 50 seq_len = 2000 -seq_div_size = 200 +seq_div_size = 100 io_dim = 256 # Model structure -hidden_dims = [256, 256, 256] +hidden_dims = [512, 512, 512, 512, 512] activation_function = Tanh() -cond_cert = [0.5, 0.5] +cond_cert = [0.5, 0.5, 0.5, 0.5] +block_prob = [0.1, 0.1, 0.1, 0.1] # Regularization w_noise_std = 0.02 @@ -35,8 +40,8 @@ learning_rate = 0.1 momentum = 0.9 -param_desc = '%s(p%s)-n%s-%dx%d(%d)-%s' % ( - repr(hidden_dims), repr(cond_cert), +param_desc = '%s(x%sp%s)-n%s-%dx%d(%d)-%s' % ( + repr(hidden_dims), repr(cond_cert), repr(block_prob), repr(w_noise_std), num_seqs, seq_len, seq_div_size, step_rule @@ -100,7 +105,7 @@ class CCHLSTM(BaseRecurrent, Initializable): self.layers.append((i0, i1, lstm, o)) - @recurrent(sequences=['inputs'], contexts=[]) + @recurrent(contexts=[]) def apply(self, inputs, **kwargs): l0i, _, l0l, l0o = self.layers[0] @@ -114,13 +119,13 @@ class CCHLSTM(BaseRecurrent, Initializable): pos = l0ov ps = new_states0 - passnext = tensor.ones((inputs.shape[0], 1)) + passnext = tensor.ones((inputs.shape[0],)) out_sc = [new_states0, new_cells0, passnext] for i, (cch, (i0, i1, l, o)) in enumerate(zip(self.cond_cert, self.layers[1:])): pop = self.softmax.apply(pos) best = pop.max(axis=1) - passnext = passnext * tensor.le(best, cch)[:, None] + passnext = passnext * tensor.le(best, cch) * kwargs['pass%d'%i] i0v = i0.apply(inputs) i1v = i1.apply(ps) @@ -131,12 +136,12 @@ class CCHLSTM(BaseRecurrent, Initializable): states=prev_states, cells=prev_cells, iterate=False) - new_states = tensor.switch(passnext, new_states, prev_states) - new_cells = tensor.switch(passnext, new_cells, prev_cells) + new_states = tensor.switch(passnext[:, None], new_states, prev_states) + new_cells = tensor.switch(passnext[:, None], new_cells, prev_cells) out_sc += [new_states, new_cells, passnext] ov = o.apply(new_states) - pos = tensor.switch(passnext, pos + ov, pos) + pos = tensor.switch(passnext[:, None], pos + ov, pos) ps = new_states return [pos] + out_sc @@ -149,6 +154,10 @@ class CCHLSTM(BaseRecurrent, Initializable): return dims[name] return super(CCHLSTM, self).get_dim(name) + @apply.property('sequences') + def apply_sequences(self): + return ['inputs'] + ['pass%d'%i for i in range(len(self.hidden_dims)-1)] + @apply.property('states') def apply_states(self): ret = [] @@ -183,9 +192,14 @@ class Model(): cond_cert=cond_cert, activation=activation_function) + # Random pass + passdict = {} + for i, p in enumerate(block_prob): + passdict['pass%d'%i] = rng.binomial(size=(inp.shape[1], inp.shape[0]), p=1-p) + # Apply it outs = cchlstm.apply(inputs=inp.dimshuffle(1, 0), - **state_vars) + **dict(state_vars.items() + passdict.items())) states = [] active_prop = [] for i in range(len(hidden_dims)): |