def __init__(self, step_rate, decay, momentum, nesterov=False):
super(SGD, self).__init__(step_rate)
self.iterations = shared_scalar(0, name='iterations')
self.decay = shared_scalar(decay, name='decay')
self.momentum = shared_scalar(momentum, name='momentum')
self.nesterov = nesterov
def __init__(self, step_rate):
super(SGD_origin, self).__init__()
self.step_rate = shared_scalar(step_rate, name='step_rate')
