Search Results for author: Efthymia Tsamoura

Found 7 papers, 1 papers with code

Parallel Neurosymbolic Integration with Concordia

no code implementations1 Jun 2023 Jonathan Feldstein, Modestas Jurčius, Efthymia Tsamoura

Parallel neurosymbolic architectures have been applied effectively in NLP by distilling knowledge from a logic theory into a deep model. However, prior art faces several limitations including supporting restricted forms of logic theories and relying on the assumption of independence between the logic and the deep network.

Action Detection Activity Detection +1

Principled and Efficient Motif Finding for Structure Learning of Lifted Graphical Models

1 code implementation9 Feb 2023 Jonathan Feldstein, Dominic Phillips, Efthymia Tsamoura

We present the first principled approach for mining structural motifs in lifted graphical models, languages that blend first-order logic with probabilistic models, which uses a stochastic process to measure the similarity of entities in the data.

Clustering Relational Reasoning

Scalable Regularization of Scene Graph Generation Models using Symbolic Theories

no code implementations6 Sep 2022 Davide Buffelli, Efthymia Tsamoura

Our work introduces a regularization technique for injecting symbolic background knowledge into neural SGG models that overcomes the limitations of prior art.

Graph Generation Scene Graph Generation

Materializing Knowledge Bases via Trigger Graphs

no code implementations4 Feb 2021 Efthymia Tsamoura, David Carral, Enrico Malizia, Jacopo Urbani

The chase is a well-established family of algorithms used to materialize Knowledge Bases (KBs), like Knowledge Graphs (KGs), to tackle important tasks like query answering under dependencies or data cleaning.

Knowledge Graphs

Neural-Symbolic Integration: A Compositional Perspective

no code implementations22 Oct 2020 Efthymia Tsamoura, Loizos Michael

Despite significant progress in the development of neural-symbolic frameworks, the question of how to integrate a neural and a symbolic system in a \emph{compositional} manner remains open.

Beyond the Grounding Bottleneck: Datalog Techniques for Inference in Probabilistic Logic Programs (Technical Report)

no code implementations18 Nov 2019 Efthymia Tsamoura, Victor Gutierrez-Basulto, Angelika Kimmig

State-of-the-art inference approaches in probabilistic logic programming typically start by computing the relevant ground program with respect to the queries of interest, and then use this program for probabilistic inference using knowledge compilation and weighted model counting.

Knowledge Graphs

Goal-Driven Query Answering for Existential Rules with Equality

no code implementations14 Nov 2017 Michael Benedikt, Boris Motik, Efthymia Tsamoura

We show empirically that our technique can significantly improve the performance of query answering, and that it can mean the difference between answering a query in a few seconds or not being able to process the query at all.

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