hermitian.py 文件源码

def sparse_dot_product0(emb, tuples, use_matmul=True, output_type='real'):
    """
    Compute the dot product of complex vectors.
    It uses complex vectors but tensorflow does not optimize in the complex space (or there is a bug in the gradient
    propagation with complex numbers...)
    :param emb: embeddings
    :param tuples: indices at which we compute dot products
    :return: scores (dot products)
    """
    n_t = tuples.get_shape()[0].value
    rk = emb.get_shape()[1].value
    emb_sel_a = tf.gather(emb, tuples[:, 0])
    emb_sel_b = tf.gather(emb, tuples[:, 1])
    if use_matmul:
        pred_cplx = tf.squeeze(tf.batch_matmul(
                tf.reshape(emb_sel_a, [n_t, rk, 1]),
                tf.reshape(emb_sel_b, [n_t, rk, 1]), adj_x=True))
    else:
        pred_cplx = tf.reduce_sum(tf.mul(tf.conj(emb_sel_a), emb_sel_b), 1)
    if output_type == 'complex':
        return pred_cplx
    elif output_type == 'real':
        return tf.real(pred_cplx) + tf.imag(pred_cplx)
    elif output_type == 'real':
        return tf.abs(pred_cplx)
    elif output_type == 'angle':
        raise NotImplementedError('No argument or inverse-tanh function for complex number in Tensorflow')
    else:
        raise NotImplementedError()