Papers by Antonio Mallia
Statistical Foundations of DIME: Risk Estimation for Practical Index Selection (2026.eacl-short)
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Giulio D'Erasmo, Cesare Campagnano, Antonio Mallia, Pierpaolo Brutti, Nicola Tonellotto, Fabrizio Silvestri
| Challenge: | High-dimensional dense embeddings are noisy or redundant, causing performance degradation and causing errors. |
| Approach: | They propose a method that scores each dimension by fusing the embeddings into a query-dependent matrix. |
| Outcome: | The proposed method improves retrieval effectiveness and reduces embedding size by an average 50% of across different models and datasets at inference time. |
Accelerating Learned Sparse Indexes Via Term Impact Decomposition (2022.findings-emnlp)
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| Challenge: | Novel inverted index-based learned sparse ranking models provide more effective, but less efficient, retrieval performance compared to traditional ranking models. |
| Approach: | They propose a technique that allows for automatic pruning of ranking models by storing metadata about index term importance scores. |
| Outcome: | The proposed technique accelerates top-k retrieval by 9.6X without loss in effectiveness. |