no code implementations • NeurIPS 2017 • Anirban Roychowdhury, Srinivasan Parthasarathy
Our approach provides a simpler alternative, by using existing dynamics in the sampling step of a Monte Carlo EM framework, and learning the mass matrices in the M step with a novel online technique.
no code implementations • 6 Apr 2017 • Anirban Roychowdhury
We propose an L-BFGS optimization algorithm on Riemannian manifolds using minibatched stochastic variance reduction techniques for fast convergence with constant step sizes, without resorting to linesearch methods designed to satisfy Wolfe conditions.
no code implementations • 4 Oct 2014 • Anirban Roychowdhury, Brian Kulis
In this paper, we present a variational inference framework for models involving gamma process priors.
no code implementations • NeurIPS 2013 • Anirban Roychowdhury, Ke Jiang, Brian Kulis
Starting with the standard HMM, we first derive a “hard” inference algorithm analogous to k-means that arises when particular variances in the model tend to zero.