Implements the well-known pairwise-based learning to rank algorithm proposed in [1] using Keras. Check out this work (Sec. 3.1.2) for more information.
[1] Burges, C., et al.: Learning to rank using gradient descent. In: Proceedings ICML-2005, 22th International Conference on Machine Learning, Bonn, Germany, pp. 89–96. ACM (2005)