Search Results for author: Nicolas Tempelmeier

Found 11 papers, 2 papers with code

Creating Knowledge Graphs for Geographic Data on the Web

1 code implementation17 Feb 2023 Elena Demidova, Alishiba Dsouza, Simon Gottschalk, Nicolas Tempelmeier, Ran Yu

Geographic data plays an essential role in various Web, Semantic Web and machine learning applications.

Knowledge Graphs

Reinforcement Learning-based Placement of Charging Stations in Urban Road Networks

1 code implementation13 Jun 2022 Leonie von Wahl, Nicolas Tempelmeier, Ashutosh Sao, Elena Demidova

We formulate the Placement of Charging Stations problem as a non-linear integer optimisation problem that seeks the optimal positions for charging stations and the optimal number of charging piles of different charging types.

reinforcement-learning Reinforcement Learning (RL)

Ovid: A Machine Learning Approach for Automated Vandalism Detection in OpenStreetMap

no code implementations21 Mar 2022 Nicolas Tempelmeier, Elena Demidova

OpenStreetMap is a unique source of openly available worldwide map data, increasingly adopted in real-world applications.

BIG-bench Machine Learning

Attention-Based Vandalism Detection in OpenStreetMap

no code implementations25 Jan 2022 Nicolas Tempelmeier, Elena Demidova

This task is remarkably challenging due to the large scale of the dataset, the sheer number of contributors, various vandalism forms, and the lack of annotated data.

WorldKG: A World-Scale Geographic Knowledge Graph

no code implementations21 Sep 2021 Alishiba Dsouza, Nicolas Tempelmeier, Ran Yu, Simon Gottschalk, Elena Demidova

We describe the WorldKG knowledge graph, including its ontology that builds the semantic dataset backbone, the extraction procedure of the ontology and geographic entities from OpenStreetMap, and the methods to enhance entity annotation.

GeoVectors: A Linked Open Corpus of OpenStreetMap Embeddings on World Scale

no code implementations30 Aug 2021 Nicolas Tempelmeier, Simon Gottschalk, Elena Demidova

OpenStreetMap (OSM) is currently the richest publicly available information source on geographic entities (e. g., buildings and roads) worldwide.

BIG-bench Machine Learning Entity Embeddings +1

Deep Information Fusion for Electric Vehicle Charging Station Occupancy Forecasting

no code implementations27 Aug 2021 Ashutosh Sao, Nicolas Tempelmeier, Elena Demidova

Our model efficiently fuses dynamic and static information to facilitate accurate forecasting.

Towards Neural Schema Alignment for OpenStreetMap and Knowledge Graphs

no code implementations28 Jul 2021 Alishiba Dsouza, Nicolas Tempelmeier, Elena Demidova

Our experiments performed to align OSM datasets for several countries with two of the most prominent openly available knowledge graphs, namely, Wikidata and DBpedia, demonstrate that the proposed approach outperforms the state-of-the-art schema alignment baselines by up to 53 percentage points in terms of F1-score.

Knowledge Graphs TAG

Mining Topological Dependencies of Recurrent Congestion in Road Networks

no code implementations20 Jul 2021 Nicolas Tempelmeier, Udo Feuerhake, Oskar Wage, Elena Demidova

The discovery of spatio-temporal dependencies within urban road networks that cause Recurrent Congestion (RC) patterns is crucial for numerous real-world applications, including urban planning and scheduling of public transportation services.

Scheduling

Linking OpenStreetMap with Knowledge Graphs -- Link Discovery for Schema-Agnostic Volunteered Geographic Information

no code implementations6 Nov 2020 Nicolas Tempelmeier, Elena Demidova

In this article, we propose OSM2KG - a novel link discovery approach to predict identity links between OSM nodes and geographic entities in a knowledge graph.

Knowledge Graphs Link Prediction

Inferring Missing Categorical Information in Noisy and Sparse Web Markup

no code implementations1 Mar 2018 Nicolas Tempelmeier, Elena Demidova, Stefan Dietze

Nevertheless, given the scale and diversity of Web markup data, nodes that provide missing information can be obtained from the Web in large quantities, in particular for categorical properties.

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