Vel factory function

def create(backbone: ModelFactory, input_block: typing.Optional[ModelFactory]=None, initial_std_dev=0.4,
           factorized_noise=True):
    """ Vel factory function """
    if input_block is None:
        input_block = IdentityFactory()

    return NoisyQModelFactory(
        input_block=input_block, backbone=backbone, initial_std_dev=initial_std_dev, factorized_noise=factorized_noise
    )