Search Results for author: Katherine A. Heller

Found 10 papers, 1 papers with code

Variational Refinement for Importance Sampling Using the Forward Kullback-Leibler Divergence

no code implementations30 Jun 2021 Ghassen Jerfel, Serena Wang, Clara Fannjiang, Katherine A. Heller, Yian Ma, Michael I. Jordan

We thus propose a novel combination of optimization and sampling techniques for approximate Bayesian inference by constructing an IS proposal distribution through the minimization of a forward KL (FKL) divergence.

Bayesian Inference Variational Inference

An inner-loop free solution to inverse problems using deep neural networks

no code implementations NeurIPS 2017 Qi Wei, Kai Fan, Lawrence Carin, Katherine A. Heller

For matrix inversion in the second sub-problem, we learn a convolutional neural network to approximate the matrix inversion, i. e., the inverse mapping is learned by feeding the input through the learned forward network.

Denoising

Transfer Learning via Latent Factor Modeling to Improve Prediction of Surgical Complications

no code implementations2 Dec 2016 Elizabeth C Lorenzi, Zhifei Sun, Erich Huang, Ricardo Henao, Katherine A. Heller

We aim to create a framework for transfer learning using latent factor models to learn the dependence structure between a larger source dataset and a target dataset.

Transfer Learning

Fast Second Order Stochastic Backpropagation for Variational Inference

no code implementations NeurIPS 2015 Kai Fan, Ziteng Wang, Jeff Beck, James Kwok, Katherine A. Heller

We propose a second-order (Hessian or Hessian-free) based optimization method for variational inference inspired by Gaussian backpropagation, and argue that quasi-Newton optimization can be developed as well.

regression Variational Inference

Parallelizing MCMC with Random Partition Trees

2 code implementations NeurIPS 2015 Xiangyu Wang, Fangjian Guo, Katherine A. Heller, David B. Dunson

The new algorithm applies random partition trees to combine the subset posterior draws, which is distribution-free, easy to resample from and can adapt to multiple scales.

Bayesian Inference

Modelling Reciprocating Relationships with Hawkes Processes

no code implementations NeurIPS 2012 Charles Blundell, Jeff Beck, Katherine A. Heller

We present a Bayesian nonparametric model that discovers implicit social structure from interaction time-series data.

Time Series Time Series Analysis

Complex Inference in Neural Circuits with Probabilistic Population Codes and Topic Models

no code implementations NeurIPS 2012 Jeff Beck, Alexandre Pouget, Katherine A. Heller

This ability requires a neural code that represents probability distributions and neural circuits that are capable of implementing the operations of probabilistic inference.

Decision Making Document Classification +2

Hierarchical Learning of Dimensional Biases in Human Categorization

no code implementations NeurIPS 2009 Adam Sanborn, Nick Chater, Katherine A. Heller

Specifically, we present a rational model that does not assume dimensions, but learns the same type of dimensional generalizations that people display.

Bayesian Exponential Family PCA

no code implementations NeurIPS 2008 Shakir Mohamed, Zoubin Ghahramani, Katherine A. Heller

Principal Components Analysis (PCA) has become established as one of the key tools for dimensionality reduction when dealing with real valued data.

Bayesian Inference Dimensionality Reduction

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