Search Results for author: Lorenzo Pacchiardi

Found 7 papers, 7 papers with code

How to Catch an AI Liar: Lie Detection in Black-Box LLMs by Asking Unrelated Questions

1 code implementation26 Sep 2023 Lorenzo Pacchiardi, Alex J. Chan, Sören Mindermann, Ilan Moscovitz, Alexa Y. Pan, Yarin Gal, Owain Evans, Jan Brauner

Large language models (LLMs) can "lie", which we define as outputting false statements despite "knowing" the truth in a demonstrable sense.

Misinformation

Likelihood-Free Inference with Generative Neural Networks via Scoring Rule Minimization

1 code implementation31 May 2022 Lorenzo Pacchiardi, Ritabrata Dutta

However, generative networks only allow sampling from the parametrized distribution; for this reason, Ramesh et al. [2022] follows the common solution of adversarial training, where the generative network plays a min-max game against a "critic" network.

Uncertainty Quantification

Probabilistic Forecasting with Generative Networks via Scoring Rule Minimization

1 code implementation15 Dec 2021 Lorenzo Pacchiardi, Rilwan Adewoyin, Peter Dueben, Ritabrata Dutta

Adversarial-free minimization is possible for some scoring rules; hence, our framework avoids the cumbersome hyperparameter tuning and uncertainty underestimation due to unstable adversarial training, thus unlocking reliable use of generative networks in probabilistic forecasting.

Uncertainty Quantification Weather Forecasting

Score Matched Neural Exponential Families for Likelihood-Free Inference

2 code implementations20 Dec 2020 Lorenzo Pacchiardi, Ritabrata Dutta

Bayesian Likelihood-Free Inference (LFI) approaches allow to obtain posterior distributions for stochastic models with intractable likelihood, by relying on model simulations.

Bayesian Inference Time Series +1

Using mobility data in the design of optimal lockdown strategies for the COVID-19 pandemic in England

2 code implementations29 Jun 2020 Ritabrata Dutta, Susana Gomes, Dante Kalise, Lorenzo Pacchiardi

A mathematical model for the COVID-19 pandemic spread in England is presented.

Applications Physics and Society Populations and Evolution

Distance-learning For Approximate Bayesian Computation To Model a Volcanic Eruption

1 code implementation28 Sep 2019 Lorenzo Pacchiardi, Pierre Kunzli, Marcel Schoengens, Bastien Chopard, Ritabrata Dutta

Using ABC, which depends on many simulations from the considered model, we develop an inferential framework to learn parameters of a stochastic numerical simulator of volcanic eruption.

Computation Applications

ABCpy: A High-Performance Computing Perspective to Approximate Bayesian Computation

1 code implementation13 Nov 2017 Ritabrata Dutta, Marcel Schoengens, Lorenzo Pacchiardi, Avinash Ummadisingu, Nicole Widmer, Jukka-Pekka Onnela, Antonietta Mira

Further, ABCpy enables ABC experts to easily develop new inference schemes and evaluate them in a standardized environment and to extend the library with new algorithms.

Computation

Cannot find the paper you are looking for? You can Submit a new open access paper.