Search Results for author: Alex Boyd

Found 10 papers, 5 papers with code

On the Efficient Marginalization of Probabilistic Sequence Models

no code implementations6 Mar 2024 Alex Boyd

Real-world data often exhibits sequential dependence, across diverse domains such as human behavior, medicine, finance, and climate modeling.

Point Processes

Probabilistic Modeling for Sequences of Sets in Continuous-Time

1 code implementation22 Dec 2023 Yuxin Chang, Alex Boyd, Padhraic Smyth

In this work, we develop a general framework for modeling set-valued data in continuous-time, compatible with any intensity-based recurrent neural point process model.

Model Selection Point Processes

Bayesian Online Learning for Consensus Prediction

no code implementations12 Dec 2023 Sam Showalter, Alex Boyd, Padhraic Smyth, Mark Steyvers

Given a pre-trained classifier and multiple human experts, we investigate the task of online classification where model predictions are provided for free but querying humans incurs a cost.

Understanding Pathologies of Deep Heteroskedastic Regression

no code implementations29 Jun 2023 Eliot Wong-Toi, Alex Boyd, Vincent Fortuin, Stephan Mandt

Deep, overparameterized regression models are notorious for their tendency to overfit.

regression

Probabilistic Querying of Continuous-Time Event Sequences

no code implementations15 Nov 2022 Alex Boyd, Yuxin Chang, Stephan Mandt, Padhraic Smyth

Continuous-time event sequences, i. e., sequences consisting of continuous time stamps and associated event types ("marks"), are an important type of sequential data with many applications, e. g., in clinical medicine or user behavior modeling.

Vocal Bursts Type Prediction

Predictive Querying for Autoregressive Neural Sequence Models

1 code implementation12 Oct 2022 Alex Boyd, Sam Showalter, Stephan Mandt, Padhraic Smyth

In reasoning about sequential events it is natural to pose probabilistic queries such as "when will event A occur next" or "what is the probability of A occurring before B", with applications in areas such as user modeling, medicine, and finance.

Language Modelling

Structured Stochastic Gradient MCMC

1 code implementation19 Jul 2021 Antonios Alexos, Alex Boyd, Stephan Mandt

Since practitioners face speed versus accuracy tradeoffs in these models, variational inference (VI) is often the preferable option.

Bayesian Inference Variational Inference

Detecting and Adapting to Irregular Distribution Shifts in Bayesian Online Learning

1 code implementation NeurIPS 2021 Aodong Li, Alex Boyd, Padhraic Smyth, Stephan Mandt

We consider the problem of online learning in the presence of distribution shifts that occur at an unknown rate and of unknown intensity.

Autonomous Navigation Change Point Detection

User-Dependent Neural Sequence Models for Continuous-Time Event Data

1 code implementation NeurIPS 2020 Alex Boyd, Robert Bamler, Stephan Mandt, Padhraic Smyth

Modeling such data can be very challenging, in particular for applications with many different types of events, since it requires a model to predict the event types as well as the time of occurrence.

Variational Inference

Large Scale Multi-Actor Generative Dialog Modeling

no code implementations ACL 2020 Alex Boyd, Raul Puri, Mohammad Shoeybi, Mostofa Patwary, Bryan Catanzaro

This work introduces the Generative Conversation Control model, an augmented and fine-tuned GPT-2 language model that conditions on past reference conversations to probabilistically model multi-turn conversations in the actor's persona.

Goal-Oriented Dialog Language Modelling

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