Search Results for author: Dimitrios Alivanistos

Found 5 papers, 3 papers with code

Approximate Answering of Graph Queries

no code implementations12 Aug 2023 Michael Cochez, Dimitrios Alivanistos, Erik Arakelyan, Max Berrendorf, Daniel Daza, Mikhail Galkin, Pasquale Minervini, Mathias Niepert, Hongyu Ren

We will first provide an overview of the different query types which can be supported by these methods and datasets typically used for evaluation, as well as an insight into their limitations.

Knowledge Graphs World Knowledge

BioBLP: A Modular Framework for Learning on Multimodal Biomedical Knowledge Graphs

1 code implementation6 Jun 2023 Daniel Daza, Dimitrios Alivanistos, Payal Mitra, Thom Pijnenburg, Michael Cochez, Paul Groth

We train models using a biomedical KG containing approximately 2 million triples, and evaluate the performance of the resulting entity embeddings on the tasks of link prediction, and drug-protein interaction prediction, comparing against methods that do not take attribute data into account.

Attribute Entity Embeddings +2

Query Embedding on Hyper-relational Knowledge Graphs

1 code implementation ICLR 2022 Dimitrios Alivanistos, Max Berrendorf, Michael Cochez, Mikhail Galkin

Besides that, we propose a method to answer such queries and demonstrate in our experiments that qualifiers improve query answering on a diverse set of query patterns.

Knowledge Graphs Link Prediction +2

Approximate Knowledge Graph Query Answering: From Ranking to Binary Classification

no code implementations22 Feb 2021 Ruud van Bakel, Teodor Aleksiev, Daniel Daza, Dimitrios Alivanistos, Michael Cochez

Structured querying on such incomplete graphs will result in incomplete sets of answers, even if the correct entities exist in the graph, since one or more edges needed to match the pattern are missing.

Binary Classification Classification +4

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