128 citations · 148 across the 7 of their papers we have counts for
4 papers · 1 filter
Signed Graph Neural Networks: A Frequency Perspective
Rahul Singh, Yongxin Chen
Graph convolutional networks (GCNs) and its variants are designed for unsigned graphs containing only positive links. Many existing GCNs have been derived from the spectral domain…
Learning Hidden Markov Models from Aggregate Observations
Rahul Singh, Qinsheng Zhang, Yongxin Chen
In this paper, we propose an algorithm for estimating the parameters of a time-homogeneous hidden Markov model from aggregate observations. This problem arises when only the popula…
Improving Robustness via Risk Averse Distributional Reinforcement Learning
Rahul Singh, Qinsheng Zhang, Yongxin Chen
One major obstacle that precludes the success of reinforcement learning in real-world applications is the lack of robustness, either to model uncertainties or external disturbances…
Sample-based Distributional Policy Gradient
Rahul Singh, Keuntaek Lee, Yongxin Chen
Distributional reinforcement learning (DRL) is a recent reinforcement learning framework whose success has been supported by various empirical studies. It relies on the key idea of…