Search Results for author: Sally Cripps

Found 10 papers, 5 papers with code

Plug-and-Play Model-Agnostic Counterfactual Policy Synthesis for Deep Reinforcement Learning based Recommendation

no code implementations10 Aug 2022 Siyu Wang, Xiaocong Chen, Lina Yao, Sally Cripps, Julian McAuley

Recent advances in recommender systems have proved the potential of Reinforcement Learning (RL) to handle the dynamic evolution processes between users and recommender systems.

counterfactual Data Augmentation +3

A Deep Architecture for Log-Linear Models

no code implementations NeurIPS Workshop DL-IG 2020 Simon Luo, Sally Cripps, Mahito Sugiyama

We present a novel perspective on deep learning architectures using a partial order structure, which is naturally incorporated into the information geometric formulation of the log-linear model.

Learning as We Go: An Examination of the Statistical Accuracy of COVID19 Daily Death Count Predictions

2 code implementations9 Apr 2020 Roman Marchant, Noelle I. Samia, Ori Rosen, Martin A. Tanner, Sally Cripps

To assess the accuracy of the IHME models, we examine both forecast accuracy as well as the predictive performance of the 95% prediction intervals provided by the IHME models.

Other Statistics Populations and Evolution

Structured Variational Inference in Continuous Cox Process Models

1 code implementation NeurIPS 2019 Virginia Aglietti, Edwin V. Bonilla, Theodoros Damoulas, Sally Cripps

We propose a scalable framework for inference in an inhomogeneous Poisson process modeled by a continuous sigmoidal Cox process that assumes the corresponding intensity function is given by a Gaussian process (GP) prior transformed with a scaled logistic sigmoid function.

Numerical Integration Uncertainty Quantification +1

Bayesian Nonparametric Adaptive Spectral Density Estimation for Financial Time Series

no code implementations9 Feb 2019 Nick James, Roman Marchant, Richard Gerlach, Sally Cripps

Discrimination between non-stationarity and long-range dependency is a difficult and long-standing issue in modelling financial time series.

Density Estimation Time Series +1

Efficiency and robustness in Monte Carlo sampling of 3-D geophysical inversions with Obsidian v0.1.2: Setting up for success

no code implementations2 Dec 2018 Richard Scalzo, David Kohn, Hugo Olierook, Gregory Houseman, Rohitash Chandra, Mark Girolami, Sally Cripps

We explore the influences of different choices made by the practitioner on the efficiency and accuracy of Bayesian geophysical inversion methods that rely on Markov chain Monte Carlo sampling to assess uncertainty, using a multi-sensor inversion of the three-dimensional structure and composition of a region in the Cooper Basin of South Australia as a case study.

Langevin-gradient parallel tempering for Bayesian neural learning

1 code implementation11 Nov 2018 Rohitash Chandra, Konark Jain, Ratneel V. Deo, Sally Cripps

This not only provides point estimates of optimal set of weights but also the ability to quantify uncertainty in decision making using the posterior distribution.

Decision Making Time Series +2

Multi-core parallel tempering Bayeslands for basin and landscape evolution

2 code implementations23 Jun 2018 Rohitash Chandra, R. Dietmar Müller, Ratneel Deo, Nathaniel Butterworth, Tristan Salles, Sally Cripps

The results show that PT in Bayeslands not only reduces the computation time over a multi-core architecture, but also provides a means to improve the sampling process in a multi-modal landscape.

Geophysics Distributed, Parallel, and Cluster Computing

Bayeslands: A Bayesian inference approach for parameter uncertainty quantification in Badlands

1 code implementation2 May 2018 Rohitash Chandra, Danial Azam, R. Dietmar Müller, Tristan Salles, Sally Cripps

The inference of unknown parameters is challenging due to the scarcity of data, sensitivity of the parameter setting and complexity of the Badlands model.

Bayesian Inference Uncertainty Quantification

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