Search Results for author: Matthew J. Johnson

Found 11 papers, 5 papers with code

Decomposing reverse-mode automatic differentiation

no code implementations20 May 2021 Roy Frostig, Matthew J. Johnson, Dougal Maclaurin, Adam Paszke, Alexey Radul

We decompose reverse-mode automatic differentiation into (forward-mode) linearization followed by transposition.

Autoconj: Recognizing and Exploiting Conjugacy Without a Domain-Specific Language

2 code implementations NeurIPS 2018 Matthew D. Hoffman, Matthew J. Johnson, Dustin Tran

Deriving conditional and marginal distributions using conjugacy relationships can be time consuming and error prone.

The LORACs prior for VAEs: Letting the Trees Speak for the Data

no code implementations16 Oct 2018 Sharad Vikram, Matthew D. Hoffman, Matthew J. Johnson

In variational autoencoders, the prior on the latent codes $z$ is often treated as an afterthought, but the prior shapes the kind of latent representation that the model learns.

Clustering

SOLAR: Deep Structured Representations for Model-Based Reinforcement Learning

1 code implementation ICLR 2019 Marvin Zhang, Sharad Vikram, Laura Smith, Pieter Abbeel, Matthew J. Johnson, Sergey Levine

Model-based reinforcement learning (RL) has proven to be a data efficient approach for learning control tasks but is difficult to utilize in domains with complex observations such as images.

Model-based Reinforcement Learning reinforcement-learning +1

Estimating the Spectral Density of Large Implicit Matrices

no code implementations9 Feb 2018 Ryan P. Adams, Jeffrey Pennington, Matthew J. Johnson, Jamie Smith, Yaniv Ovadia, Brian Patton, James Saunderson

However, naive eigenvalue estimation is computationally expensive even when the matrix can be represented; in many of these situations the matrix is so large as to only be available implicitly via products with vectors.

Multimodal Prediction and Personalization of Photo Edits with Deep Generative Models

no code implementations17 Apr 2017 Ardavan Saeedi, Matthew D. Hoffman, Stephen J. DiVerdi, Asma Ghandeharioun, Matthew J. Johnson, Ryan P. Adams

Professional-grade software applications are powerful but complicated$-$expert users can achieve impressive results, but novices often struggle to complete even basic tasks.

Recurrent switching linear dynamical systems

1 code implementation26 Oct 2016 Scott W. Linderman, Andrew C. Miller, Ryan P. Adams, David M. Blei, Liam Paninski, Matthew J. Johnson

Many natural systems, such as neurons firing in the brain or basketball teams traversing a court, give rise to time series data with complex, nonlinear dynamics.

Bayesian Inference Time Series +1

Composing graphical models with neural networks for structured representations and fast inference

3 code implementations NeurIPS 2016 Matthew J. Johnson, David Duvenaud, Alexander B. Wiltschko, Sandeep R. Datta, Ryan P. Adams

We propose a general modeling and inference framework that composes probabilistic graphical models with deep learning methods and combines their respective strengths.

Variational Inference

Dependent Multinomial Models Made Easy: Stick Breaking with the Pólya-Gamma Augmentation

1 code implementation18 Jun 2015 Scott W. Linderman, Matthew J. Johnson, Ryan P. Adams

Many practical modeling problems involve discrete data that are best represented as draws from multinomial or categorical distributions.

Bayesian Inference Position

Detailed Derivations of Small-Variance Asymptotics for some Hierarchical Bayesian Nonparametric Models

no code implementations31 Dec 2014 Jonathan H. Huggins, Ardavan Saeedi, Matthew J. Johnson

In this note we provide detailed derivations of two versions of small-variance asymptotics for hierarchical Dirichlet process (HDP) mixture models and the HDP hidden Markov model (HDP-HMM, a. k. a.

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