no code implementations • 2 Dec 2024 • Nadeen Fathallah, Steffen Staab, Alsayed Algergawy
Our work evaluates the capabilities of LLMs in ontology learning in the context of highly specialized and complex domains such as life science domains.
1 code implementation • 25 Nov 2024 • Ansgar Scherp, Thomas Franz, Carsten Saathoff, Steffen Staab
The lack of a formal model of events hinders interoperability in distributed event-based systems.
no code implementations • 29 Oct 2024 • Yunjie He, Bo Xiong, Daniel Hernández, Yuqicheng Zhu, Evgeny Kharlamov, Steffen Staab
We show that it is possible to implement DAGE on top of existing query embedding methods, and we empirically measure the improvement of our method over the results of vanilla methods evaluated in tree-form queries that approximate the DAG queries of our proposed benchmark.
no code implementations • 21 Oct 2024 • Hongkuan Zhou, Lavdim Halilaj, Sebastian Monka, Stefan Schmid, Yuqicheng Zhu, Bo Xiong, Steffen Staab
The respective embeddings are generated from the given modalities in a common latent space, i. e., visual embeddings from original and synthetic images as well as knowledge graph embeddings (KGEs).
no code implementations • 16 Oct 2024 • Cosimo Gregucci, Bo Xiong, Daniel Hernandez, Lorenzo Loconte, Pasquale Minervini, Steffen Staab, Antonio Vergari
The performance of state-of-the-art CQA models drops significantly when such models are evaluated on queries that cannot be reduced to easier types.
no code implementations • 19 Sep 2024 • Michael Mink, Thomas Monninger, Steffen Staab
We evaluate the performance of LMT-Net on an internal dataset that consists of multiple vehicle observations as well as human annotations as Ground Truth (GT).
no code implementations • 15 Aug 2024 • Yuqicheng Zhu, Nico Potyka, Jiarong Pan, Bo Xiong, Yunjie He, Evgeny Kharlamov, Steffen Staab
Knowledge graph embeddings (KGE) apply machine learning methods on knowledge graphs (KGs) to provide non-classical reasoning capabilities based on similarities and analogies.
no code implementations • 15 Aug 2024 • Yuqicheng Zhu, Nico Potyka, Mojtaba Nayyeri, Bo Xiong, Yunjie He, Evgeny Kharlamov, Steffen Staab
Our empirical study reveals significant predictive multiplicity in link prediction, with $8\%$ to $39\%$ testing queries exhibiting conflicting predictions.
no code implementations • 31 Jul 2024 • Xinyi Pan, Daniel Hernández, Philipp Seifer, Ralf Lämmel, Steffen Staab
Over the past few years, we have seen the emergence of large knowledge graphs combining information from multiple sources.
no code implementations • 16 Jul 2024 • Yuqicheng Zhu, Nico Potyka, Bo Xiong, Trung-Kien Tran, Mojtaba Nayyeri, Evgeny Kharlamov, Steffen Staab
Statistical information is ubiquitous but drawing valid conclusions from it is prohibitively hard.
1 code implementation • 12 Jul 2024 • Yunjie He, Daniel Hernandez, Mojtaba Nayyeri, Bo Xiong, Yuqicheng Zhu, Evgeny Kharlamov, Steffen Staab
AConE associates queries to a $SROI^-$ description logic concept.
no code implementations • 17 Apr 2024 • Thomas Monninger, Vandana Dokkadi, Md Zafar Anwar, Steffen Staab
These results indicate the overall effectiveness of our approach and make a strong case for aggregating temporal information in both image and BEV latent spaces.
1 code implementation • 21 Feb 2024 • Mehdi Azarafza, Mojtaba Nayyeri, Charles Steinmetz, Steffen Staab, Achim Rettberg
Large Language Models (LLMs) have garnered significant attention for their ability to understand text and images, generate human-like text, and perform complex reasoning tasks.
1 code implementation • 13 Feb 2024 • Philipp Seifer, Daniel Hernández, Ralf Lämmel, Steffen Staab
However, it becomes challenging to understand what graph data can be expected at the end of a data processing pipeline without knowing the particular input data: Shape constraints on the input graph may affect the output graph, but may no longer apply literally, and new shapes may be imposed by the query template.
no code implementations • 22 Dec 2023 • Nico Potyka, Yuqicheng Zhu, Yunjie He, Evgeny Kharlamov, Steffen Staab
Large-language models (LLMs) can support a wide range of applications like conversational agents, creative writing or general query answering.
1 code implementation • 21 Dec 2023 • Jiaxin Pan, Mojtaba Nayyeri, Yinan Li, Steffen Staab
Temporal knowledge graphs may exhibit static temporal patterns at distinct points in time and dynamic temporal patterns between different timestamps.
1 code implementation • 14 Dec 2023 • Bo Xiong, Mojtaba Nayyeri, Linhao Luo, ZiHao Wang, Shirui Pan, Steffen Staab
NestE represents each atomic fact as a $1\times3$ matrix, and each nested relation is modeled as a $3\times3$ matrix that rotates the $1\times3$ atomic fact matrix through matrix multiplication.
no code implementations • 21 Nov 2023 • Xuan Zhao, Simone Fabbrizzi, Paula Reyero Lobo, Siamak Ghodsi, Klaus Broelemann, Steffen Staab, Gjergji Kasneci
To balance the data distribution between the majority and the minority groups, our approach deemphasizes samples from the majority group.
1 code implementation • 26 Sep 2023 • Thomas Monninger, Andreas Weber, Steffen Staab
We show the effectiveness of basic statistical approaches for this task by implementing and evaluating a pattern-based contribution method.
no code implementations • 14 Jun 2023 • Tim Schneider, Amin Totounferoush, Wolfgang Nowak, Steffen Staab
Symbolic Regression (SR) allows for the discovery of scientific equations from data.
1 code implementation • 3 Jun 2023 • Bo Xiong, Mojtaba Nayyer, Shirui Pan, Steffen Staab
Although some recent works have proposed to embed hyper-relational KGs, these methods fail to capture essential inference patterns of hyper-relational facts such as qualifier monotonicity, qualifier implication, and qualifier mutual exclusion, limiting their generalization capability.
no code implementations • 24 Apr 2023 • Bo Xiong, Mojtaba Nayyeri, Ming Jin, Yunjie He, Michael Cochez, Shirui Pan, Steffen Staab
Geometric relational embeddings map relational data as geometric objects that combine vector information suitable for machine learning and structured/relational information for structured/relational reasoning, typically in low dimensions.
Hierarchical Multi-label Classification Knowledge Graph Completion +2
no code implementations • 12 Apr 2023 • Jiaying Lu, Jiaming Shen, Bo Xiong, Wenjing Ma, Steffen Staab, Carl Yang
Medical decision-making processes can be enhanced by comprehensive biomedical knowledge bases, which require fusing knowledge graphs constructed from different sources via a uniform index system.
no code implementations • 21 Mar 2023 • Yunjie He, Mojtaba Nayyeri, Bo Xiong, Yuqicheng Zhu, Evgeny Kharlamov, Steffen Staab
However, the role of such patterns in answering FOL queries by query embedding models has not been yet studied in the literature.
no code implementations • 14 Mar 2023 • Carlos Mougan, Laura State, Antonio Ferrara, Salvatore Ruggieri, Steffen Staab
Liberalism-oriented political philosophy reasons that all individuals should be treated equally independently of their protected characteristics.
no code implementations • 14 Mar 2023 • Carlos Mougan, Klaus Broelemann, David Masip, Gjergji Kasneci, Thanassis Thiropanis, Steffen Staab
Then, state-of-the-art techniques model input data distributions or model prediction distributions and try to understand issues regarding the interactions between learned models and shifting distributions.
no code implementations • 13 Feb 2023 • Cosimo Gregucci, Mojtaba Nayyeri, Daniel Hernández, Steffen Staab
As a result, the combined model can learn relational and structural patterns.
1 code implementation • 9 Jan 2023 • Thomas Monninger, Julian Schmidt, Jan Rupprecht, David Raba, Julian Jordan, Daniel Frank, Steffen Staab, Klaus Dietmayer
In this work we propose SCENE, a methodology to encode diverse traffic scenes in heterogeneous graphs and to reason about these graphs using a heterogeneous Graph Neural Network encoder and task-specific decoders.
Ranked #1 on Node Classification on BGS
1 code implementation • 12 Dec 2022 • Daniel Frank, Decky Aspandi Latif, Michael Muehlebach, Benjamin Unger, Steffen Staab
In this work, we represent a recurrent neural network as a linear time-invariant system with nonlinear disturbances.
no code implementations • 15 Nov 2022 • Ciheng Zhang, Decky Aspandi, Steffen Staab
This is done by the curation of a unified dataset that consists of website screenshots, eye-gaze heatmap and website's layout information in the form of image and text masks.
no code implementations • 22 Oct 2022 • Carlos Mougan, Klaus Broelemann, Gjergji Kasneci, Thanassis Tiropanis, Steffen Staab
We provide a mathematical analysis of different types of distribution shifts as well as synthetic experimental examples.
1 code implementation • 4 Aug 2022 • Mojtaba Nayyeri, ZiHao Wang, Mst. Mahfuja Akter, Mirza Mohtashim Alam, Md Rashad Al Hasan Rony, Jens Lehmann, Steffen Staab
In our approach, we build on existing strong representations of single modalities and we use hypercomplex algebra to represent both, (i), single-modality embedding as well as, (ii), the interaction between different modalities and their complementary means of knowledge representation.
no code implementations • 1 Jun 2022 • Bo Xiong, Shichao Zhu, Mojtaba Nayyeri, Chengjin Xu, Shirui Pan, Chuan Zhou, Steffen Staab
Recent knowledge graph (KG) embeddings have been advanced by hyperbolic geometry due to its superior capability for representing hierarchies.
1 code implementation • 8 Feb 2022 • Tim Schneider, Chen Qiu, Marius Kloft, Decky Aspandi Latif, Steffen Staab, Stephan Mandt, Maja Rudolph
We develop a new method to detect anomalies within time series, which is essential in many application domains, reaching from self-driving cars, finance, and marketing to medical diagnosis and epidemiology.
2 code implementations • 27 Jan 2022 • Carlos Mougan, Jose M. Alvarez, Salvatore Ruggieri, Steffen Staab
We investigate the interaction between categorical encodings and target encoding regularization methods that reduce unfairness.
1 code implementation • 24 Jan 2022 • Bo Xiong, Nico Potyka, Trung-Kien Tran, Mojtaba Nayyeri, Steffen Staab
Namely, the learned model of BoxEL embedding with loss 0 is a (logical) model of the KB.
1 code implementation • 9 Dec 2021 • Lukas Schmelzeisen, Corina Dima, Steffen Staab
Wikidata is the largest general-interest knowledge base that is openly available.
1 code implementation • 12 Jul 2021 • Philipp Seifer, Ralf Lämmel, Steffen Staab
In RDF representations, this error can be addressed by shape languages such as SHACL or ShEx, which allow for checking whether graphs are valid with respect to a set of domain constraints.
1 code implementation • 25 Jun 2021 • Jonathan Spieler, Nico Potyka, Steffen Staab
As a first proof of concept, we propose a genetic algorithm to simultaneously learn the structure of argumentative classification models.
1 code implementation • 6 Jun 2021 • Bo Xiong, Shichao Zhu, Nico Potyka, Shirui Pan, Chuan Zhou, Steffen Staab
Empirical results demonstrate that our method outperforms Riemannian counterparts when embedding graphs of complex topologies.
1 code implementation • 11 Mar 2021 • Alexandra Baier, Zeyd Boukhers, Steffen Staab
Physical motion models offer interpretable predictions for the motion of vehicles.
1 code implementation • 23 Nov 2020 • Zeyd Boukhers, Danniene Wete, Steffen Staab
Processing sequential multi-sensor data becomes important in many tasks due to the dramatic increase in the availability of sensors that can acquire sequential data over time.
no code implementations • 18 Nov 2020 • Bo Xiong, Yimin Huang, Hanrong Ye, Steffen Staab, Zhenguo Li
MOFA pursues several rounds of HPO, where each round alternates between exploration of hyperparameter space by factorial design and exploitation of evaluation results by factorial analysis.
no code implementations • 10 Sep 2020 • Timo Homburg, Steffen Staab, Daniel Janke
We introduce an approach to semantically represent and query raster data in a Semantic Web graph.
no code implementations • LREC 2020 • Rudolf Schneider, Tom Oberhauser, Paul Grundmann, Felix Alex Gers, Alex Loeser, er, Steffen Staab
We present PubMedSection, a novel topic classification dataset focussed on the biomedical domain.
2 code implementations • 4 Mar 2020 • Aidan Hogan, Eva Blomqvist, Michael Cochez, Claudia d'Amato, Gerard de Melo, Claudio Gutierrez, José Emilio Labra Gayo, Sabrina Kirrane, Sebastian Neumaier, Axel Polleres, Roberto Navigli, Axel-Cyrille Ngonga Ngomo, Sabbir M. Rashid, Anisa Rula, Lukas Schmelzeisen, Juan Sequeda, Steffen Staab, Antoine Zimmermann
In this paper we provide a comprehensive introduction to knowledge graphs, which have recently garnered significant attention from both industry and academia in scenarios that require exploiting diverse, dynamic, large-scale collections of data.
no code implementations • 16 Oct 2019 • Jun Sun, Steffen Staab, Jérôme Kunegis
A detailed understanding of users contributes to the understanding of the Web's evolution, and to the development of Web applications.
1 code implementation • SEMEVAL 2019 • Ipek Baris, Lukas Schmelzeisen, Steffen Staab
The goal of subtask B is to predict the veracity of a given rumor.
no code implementations • 31 Jan 2019 • Lukas Schmelzeisen, Steffen Staab
Taxonomies are semantic hierarchies of concepts.
no code implementations • 9 Nov 2016 • Jun Sun, Jérôme Kunegis, Steffen Staab
How can we recognise social roles of people, given a completely unlabelled social network?
no code implementations • 25 Apr 2016 • Steffen Staab, Sophie Stalla-Bourdillon, Laura Carmichael
The research question this report addresses is: how, and to what extent, those directly involved with the design, development and employment of a specific black box algorithm can be certain that it is not unlawfully discriminating (directly and/or indirectly) against particular persons with protected characteristics (e. g. gender, race and ethnicity)?
1 code implementation • 13 Apr 2014 • Rene Pickhardt, Thomas Gottron, Martin Körner, Paul Georg Wagner, Till Speicher, Steffen Staab
In an extensive empirical experiment over English text corpora we demonstrate that our generalized language models lead to a substantial reduction of perplexity between 3. 1% and 12. 7% in comparison to traditional language models using modified Kneser-Ney smoothing.