Search Results for author: Freddy Lecue

Found 28 papers, 7 papers with code

KnowHalu: Hallucination Detection via Multi-Form Knowledge Based Factual Checking

1 code implementation3 Apr 2024 Jiawei Zhang, Chejian Xu, Yu Gai, Freddy Lecue, Dawn Song, Bo Li

This paper introduces KnowHalu, a novel approach for detecting hallucinations in text generated by large language models (LLMs), utilizing step-wise reasoning, multi-formulation query, multi-form knowledge for factual checking, and fusion-based detection mechanism.

Fact Checking Hallucination +1

REFRESH: Responsible and Efficient Feature Reselection Guided by SHAP Values

no code implementations13 Mar 2024 Shubham Sharma, Sanghamitra Dutta, Emanuele Albini, Freddy Lecue, Daniele Magazzeni, Manuela Veloso

In this paper, we introduce the problem of feature \emph{reselection}, so that features can be selected with respect to secondary model performance characteristics efficiently even after a feature selection process has been done with respect to a primary objective.

Fairness feature selection

Leveraging Large Language Models for Concept Graph Recovery and Question Answering in NLP Education

1 code implementation22 Feb 2024 Rui Yang, Boming Yang, Sixun Ouyang, Tianwei She, Aosong Feng, Yuang Jiang, Freddy Lecue, Jinghui Lu, Irene Li

We assess LLMs' zero-shot performance in creating domain-specific concept graphs and introduce TutorQA, a new expert-verified NLP-focused benchmark for scientific graph reasoning and QA.

Question Answering Text Generation

Knowledge-Aware Neuron Interpretation for Scene Classification

no code implementations29 Jan 2024 Yong Guan, Freddy Lecue, Jiaoyan Chen, Ru Li, Jeff Z. Pan

Specifically, for concept completeness, we present core concepts of a scene based on knowledge graph, ConceptNet, to gauge the completeness of concepts.

Classification Scene Classification

Better Explain Transformers by Illuminating Important Information

1 code implementation18 Jan 2024 Linxin Song, Yan Cui, Ao Luo, Freddy Lecue, Irene Li

Transformer-based models excel in various natural language processing (NLP) tasks, attracting countless efforts to explain their inner workings.

Question Answering

Fair Coresets via Optimal Transport

no code implementations9 Nov 2023 Zikai Xiong, Niccolò Dalmasso, Shubham Sharma, Freddy Lecue, Daniele Magazzeni, Vamsi K. Potluru, Tucker Balch, Manuela Veloso

In this work, we present fair Wasserstein coresets (FWC), a novel coreset approach which generates fair synthetic representative samples along with sample-level weights to be used in downstream learning tasks.

Clustering Decision Making +1

Causal Analysis for Robust Interpretability of Neural Networks

no code implementations15 May 2023 Ola Ahmad, Nicolas Bereux, Loïc Baret, Vahid Hashemi, Freddy Lecue

The result is task-specific causal explanatory graphs that can audit model behavior and express the actual causes underlying its performance.

Attribute Image Classification

Task Adaptive Feature Transformation for One-Shot Learning

no code implementations13 Apr 2023 Imtiaz Masud Ziko, Freddy Lecue, Ismail Ben Ayed

We introduce a simple non-linear embedding adaptation layer, which is fine-tuned on top of fixed pre-trained features for one-shot tasks, improving significantly transductive entropy-based inference for low-shot regimes.

One-Shot Learning

Rethinking Log Odds: Linear Probability Modelling and Expert Advice in Interpretable Machine Learning

no code implementations11 Nov 2022 Danial Dervovic, Nicolas Marchesotti, Freddy Lecue, Daniele Magazzeni

We introduce a family of interpretable machine learning models, with two broad additions: Linearised Additive Models (LAMs) which replace the ubiquitous logistic link function in General Additive Models (GAMs); and SubscaleHedge, an expert advice algorithm for combining base models trained on subsets of features called subscales.

Additive models Binary Classification +1

Empowering the trustworthiness of ML-based critical systems through engineering activities

no code implementations30 Sep 2022 Juliette Mattioli, Agnes Delaborde, Souhaiel Khalfaoui, Freddy Lecue, Henri Sohier, Frederic Jurie

This paper reviews the entire engineering process of trustworthy Machine Learning (ML) algorithms designed to equip critical systems with advanced analytics and decision functions.

FisheyeHDK: Hyperbolic Deformable Kernel Learning for Ultra-Wide Field-of-View Image Recognition

no code implementations14 Mar 2022 Ola Ahmad, Freddy Lecue

Some methods proposed the adaptation of CNNs to ultra-wide FoV images by learning deformable kernels.

Object Recognition

Interpretable Preference-based Reinforcement Learning with Tree-Structured Reward Functions

no code implementations20 Dec 2021 Tom Bewley, Freddy Lecue

The potential of reinforcement learning (RL) to deliver aligned and performant agents is partially bottlenecked by the reward engineering problem.

reinforcement-learning Reinforcement Learning (RL)

Interventional Black-Box Explanations

no code implementations29 Sep 2021 Ola Ahmad, Simon Corbeil, Vahid Hashemi, Freddy Lecue

Finally, we believe that our method is orthogonal to logic-based explanation methods and can be leveraged to improve their explanations.

Image Classification

Adaptable Deformable Convolutions for Semantic Segmentation of Fisheye Images in Autonomous Driving Systems

no code implementations19 Feb 2021 Clément Playout, Ola Ahmad, Freddy Lecue, Farida Cheriet

Finally, we provide an in-depth analysis of the effect of the deformable convolutions, bringing elements of discussion on the behavior of CNN models.

Autonomous Driving Semantic Segmentation

Towards Knowledge-Augmented Visual Question Answering

1 code implementation COLING 2020 Maryam Ziaeefard, Freddy Lecue

We propose a model that captures the interactions between objects in a visual scene and entities in an external knowledge source.

General Knowledge Graph Attention +2

Ontology-guided Semantic Composition for Zero-Shot Learning

1 code implementation30 Jun 2020 Jiaoyan Chen, Freddy Lecue, Yuxia Geng, Jeff Z. Pan, Huajun Chen

Zero-shot learning (ZSL) is a popular research problem that aims at predicting for those classes that have never appeared in the training stage by utilizing the inter-class relationship with some side information.

Image Classification Ontology Embedding +4

Local Score Dependent Model Explanation for Time Dependent Covariates

no code implementations13 Aug 2019 Xochitl Watts, Freddy Lecue

We introduce a novel technique to find global and local explanations for time series data used in binary classification machine learning systems.

Binary Classification General Classification +2

Augmenting Transfer Learning with Semantic Reasoning

no code implementations31 May 2019 Freddy Lecue, Jiaoyan Chen, Jeff Z. Pan, Huajun Chen

We exploit their semantics to augment transfer learning by dealing with when to transfer with semantic measurements and what to transfer with semantic embeddings.

Transfer Learning

Interpretable Credit Application Predictions With Counterfactual Explanations

no code implementations13 Nov 2018 Rory Mc Grath, Luca Costabello, Chan Le Van, Paul Sweeney, Farbod Kamiab, Zhao Shen, Freddy Lecue

Our contribution is two-fold: i) we propose positive counterfactuals, i. e. we adapt counterfactual explanations to also explain accepted loan applications, and ii) we propose two weighting strategies to generate more interpretable counterfactuals.

counterfactual

Knowledge-based Transfer Learning Explanation

1 code implementation22 Jul 2018 Jiaoyan Chen, Freddy Lecue, Jeff Z. Pan, Ian Horrocks, Huajun Chen

Machine learning explanation can significantly boost machine learning's application in decision making, but the usability of current methods is limited in human-centric explanation, especially for transfer learning, an important machine learning branch that aims at utilizing knowledge from one learning domain (i. e., a pair of dataset and prediction task) to enhance prediction model training in another learning domain.

BIG-bench Machine Learning Decision Making +1

Semantic Explanations of Predictions

no code implementations27 May 2018 Freddy Lecue, Jiewen Wu

The main objective of explanations is to transmit knowledge to humans.

General Classification

Learning from Ontology Streams with Semantic Concept Drift

no code implementations24 Apr 2017 Freddy Lecue, Jiaoyan Chen, Jeff Pan, Huajun Chen

Data stream learning has been largely studied for extracting knowledge structures from continuous and rapid data records.

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