def new_update(x, new_x):
if is_one_of(x, params) and self._do_layer_adaptation(x):
dx = new_x - x
lr_t = K.clip(self.learning_rate, K.epsilon(), 1e10)
x_norm = tf.norm(x)
g_norm = tf.norm(dx / lr_t)
ratio = K.switch(
x_norm > 0.0,
K.switch(g_norm > K.epsilon(), x_norm / g_norm, 1.0),
1.0)
new_x = x + dx * ratio
return old_update(x, new_x)
def new_update(x, new_x):
if is_one_of(x, params) and self._do_lazy_optimization(x):
g = self.grads[x]
r = K.any(K.not_equal(g, 0.0), axis=-1, keepdims=True)
new_x = x + (new_x - x) * K.cast(r, K.floatx())
return old_update(x, new_x)
def new_update(x, new_x):
if is_one_of(x, params):
new_x = x + (new_x - x) * lr_multiplier
return old_update(x, new_x)
def new_update(x, new_x):
if is_one_of(x, params) and self._do_weight_decay(x):
new_x = new_x - self.learning_rate * self.weight_decay_rate * x
return old_update(x, new_x)