1. M. Ntemi, C. Kotropoulos and  E. Gionanidis, “A weighted ordered probit Collaborative Kalman filter for hotel rating prediction”, in Proc. of the IEEE Int. Workshop on Machine Learning for Signal Processing (MLSP), Pittsburgh, PA, USA, 2019
  2. G. KarantaidisI. Sarridis and C. Kotropoulos“Block Randomized Optimization for Adaptive Hypergraph Learning”in Proc. 2019 IEEE Int. Conf. Image Processing (ICIP), Taipei, Taiwan, September 22-25, 2019.  Download link: (arXiv)
  3. M. Ntemi and C. Kotropoulos, “A Dyadic Particle Filter for Price Prediction”, in Proc. 27th European Signal Proc.  Conf. (EUSIPCO), A Coruna, Spain, September 2-6, 2019.
  4.  I. Sarridis and C. Kotropoulos, “Tourism recommendation driven by hypergraph learning”, Int. Conf. Acoustics, Speech and Signal Proc. (ICASSP 2019), Brighton, UK, Show and Tell.