Search Results for author: Anirban Roychowdhury

Found 4 papers, 0 papers with code

Adaptive Bayesian Sampling with Monte Carlo EM

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.

Accelerated Stochastic Quasi-Newton Optimization on Riemann Manifolds

no code implementations6 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.

Gamma Processes, Stick-Breaking, and Variational Inference

no code implementations4 Oct 2014 Anirban Roychowdhury, Brian Kulis

In this paper, we present a variational inference framework for models involving gamma process priors.

Variational Inference

Small-Variance Asymptotics for Hidden Markov Models

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.

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