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Stefano Melacci

8 accepted papers

2025

A Neuro-Symbolic Framework for Sequence Classification with Relational and Temporal Knowledge

IJCAI 2025

One of the goals of neuro-symbolic artificial intelligence is to exploit background knowledge to improve the performance of learning tasks. However, most of the existing frameworks focus on the simplified scenario where knowledge does not change over time and does not cover the temporal dimension. I

2024

Neural Time-Reversed Generalized Riccati Equation

AAAI 2024technical

Optimal control deals with optimization problems in which variables steer a dynamical system, and its outcome contributes to the objective function. Two classical approaches to solving these problems are Dynamic Programming and the Pontryagin Maximum Principle. In both approaches, Hamiltonian equati…

Cited by 3SourcePDFScholar
2022

Being Friends Instead of Adversaries: Deep Networks Learn from Data Simplified by Other Networks

AAAI 2022technical

Amongst a variety of approaches aimed at making the learning procedure of neural networks more effective, the scientific community developed strategies to order the examples according to their estimated complexity, to distil knowledge from larger networks, or to exploit the principles behind adversa…

2022

Concept Embedding Models: Beyond the Accuracy-Explainability Trade-Off

NeurIPS 2022accept

Deploying AI-powered systems requires trustworthy models supporting effective human interactions, going beyond raw prediction accuracy. Concept bottleneck models promote trustworthiness by conditioning classification tasks on an intermediate level of human-like concepts. This enables human intervent…

2022

Entropy-Based Logic Explanations of Neural Networks

AAAI 2022technical

Explainable artificial intelligence has rapidly emerged since lawmakers have started requiring interpretable models for safety-critical domains. Concept-based neural networks have arisen as explainable-by-design methods as they leverage human-understandable symbols (i.e. concepts) to predict class m…

2022

Stochastic Coherence Over Attention Trajectory For Continuous Learning In Video Streams

IJCAI 2022poster

Devising intelligent agents able to live in an environment and learn by observing the surroundings is a longstanding goal of Artificial Intelligence. From a bare Machine Learning perspective, challenges arise when the agent is prevented from leveraging large fully-annotated dataset, but rather the i…

2020

Focus of Attention Improves Information Transfer in Visual Features

NeurIPS 2020poster

Unsupervised learning from continuous visual streams is a challenging problem that cannot be naturally and efficiently managed in the classic batch-mode setting of computation. The information stream must be carefully processed accordingly to an appropriate spatio-temporal distribution of the visua…

Cited by 15SourcePDFScholar
2020

Human-Driven FOL Explanations of Deep Learning

IJCAI 2020poster

Deep neural networks are usually considered black-boxes due to their complex internal architecture, that cannot straightforwardly provide human-understandable explanations on how they behave. Indeed, Deep Learning is still viewed with skepticism in those real-world domains in which incorrect predict…

Cited by 0SourcePDFScholar