Search Results for author: Caglar Demir

Found 16 papers, 14 papers with code

Learning Permutation-Invariant Embeddings for Description Logic Concepts

1 code implementation3 Mar 2023 Caglar Demir, Axel-Cyrille Ngonga Ngomo

We reformulate the learning problem as a multi-label classification problem and propose a neural embedding model (NERO) that learns permutation-invariant embeddings for sets of examples tailored towards predicting $F_1$ scores of pre-selected description logic concepts.

Multi-Label Classification Retrieval

Hardware-agnostic Computation for Large-scale Knowledge Graph Embeddings

1 code implementation18 Jul 2022 Caglar Demir, Axel-Cyrille Ngonga Ngomo

Knowledge graph embedding research has mainly focused on learning continuous representations of knowledge graphs towards the link prediction problem.

Continual Learning Knowledge Graph Embedding +3

Conformal Credal Self-Supervised Learning

1 code implementation30 May 2022 Julian Lienen, Caglar Demir, Eyke Hüllermeier

One such method, so-called credal self-supervised learning, maintains pseudo-supervision in the form of sets of (instead of single) probability distributions over labels, thereby allowing for a flexible yet uncertainty-aware labeling.

Conformal Prediction Self-Supervised Learning

Kronecker Decomposition for Knowledge Graph Embeddings

1 code implementation13 May 2022 Caglar Demir, Julian Lienen, Axel-Cyrille Ngonga Ngomo

Our experiments suggest that applying Kronecker decomposition on embedding matrices leads to an improved parameter efficiency on all benchmark datasets.

Hyperparameter Optimization Knowledge Graph Embedding +3

Neural Class Expression Synthesis

no code implementations16 Nov 2021 N'Dah Jean Kouagou, Stefan Heindorf, Caglar Demir, Axel-Cyrille Ngonga Ngomo

Our main intuition is that class expression learning can be regarded as a translation problem.

Machine Translation Translation

EvoLearner: Learning Description Logics with Evolutionary Algorithms

1 code implementation8 Nov 2021 Stefan Heindorf, Lukas Blübaum, Nick Düsterhus, Till Werner, Varun Nandkumar Golani, Caglar Demir, Axel-Cyrille Ngonga Ngomo

We contribute a novel initialization method for the initial population: starting from positive examples, we perform biased random walks and translate them to description logic concepts.

Benchmarking Evolutionary Algorithms +1

DRILL-- Deep Reinforcement Learning for Refinement Operators in $\mathcal{ALC}$

1 code implementation29 Jun 2021 Caglar Demir, Axel-Cyrille Ngonga Ngomo

In this work, we leverage deep reinforcement learning to accelerate the learning of concepts in $\mathcal{ALC}$ by proposing DRILL -- a novel class expression learning approach that uses a convolutional deep Q-learning model to steer its search.

Knowledge Graphs Q-Learning +2

Out-of-Vocabulary Entities in Link Prediction

1 code implementation26 May 2021 Caglar Demir, Axel-Cyrille Ngonga Ngomo

As benchmarks are crucial for the fair comparison of algorithms, ensuring their quality is tantamount to providing a solid ground for developing better solutions to link prediction and ipso facto embedding knowledge graphs.

Knowledge Graph Embedding Knowledge Graphs +1

Convolutional Complex Knowledge Graph Embeddings

1 code implementation7 Aug 2020 Caglar Demir, Axel-Cyrille Ngonga Ngomo

In this paper, we study the problem of learning continuous vector representations of knowledge graphs for predicting missing links.

Knowledge Graph Embeddings Knowledge Graphs +1

A Physical Embedding Model for Knowledge Graphs

1 code implementation21 Jan 2020 Caglar Demir, Axel-Cyrille Ngonga Ngomo

We present a novel and scalable paradigm for the computation of knowledge graph embeddings, which we dub PYKE .

Knowledge Graph Embedding Knowledge Graph Embeddings +2

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