Authors

Guillaume Brouillette

Publications 2

Preprint Open access

Finding the Right Balance: Relevance and Diversity in LLM Retrieval

Guillaume Brouillette, Faustin Kagabo, Usef Faghihi et al. · 2026

Retrieval diversification is widely available in retrieval-augmented generation (RAG) frameworks, yet prior studies disagree on whether it improves retrieval and answer quality. We show that its effectiveness varies primarily with candidate-pool redundancy, in a pattern consistent with the number of distinct evidence p …

Preprint Open access

An Invariant Tangent-Angle Descriptor and a Band U-Net for 2D Fragment Adjacency Prediction

Guillaume Brouillette, Alain Goupil, Pierre-Olivier Parisé et al. · 2026

This paper addresses the prediction of adjacency between pairs of 2D fragments based on their contours. We improved the two-stage architecture proposed in Beaulac's thesis, in which a rotation-equivariant Siamese convolutional neural network scores pairs of local image windows along the two contours of two fragments. T …

Co-authors