Giannis Nikolentzos

Giannis Nikolentzos

DaSciM
LIX, École Polytechnique
1 rue Honoré d'Estienne d'Orves
91120 Palaiseau, France

e-mail: nikolentzos@lix.polytechnique.fr


Publications - Teaching - Software - Useful Links

I am a Postdoctoral researcher at the Data Science and Mining (DaSciM) group, Computer Science Laboratory (LIX), École Polytechnique, France. I received my PhD in Graph Mining from AUEB in 2017. Before that, I obtained an MSc in Artificial Intelligence from the University of Southampton and a Diploma in Electrical and Computer Engineering from the University of Patras.

My current research interests are in the fields of learning on graphs and of graph-based information extraction.


Publications


A Degeneracy Framework for Graph Similarity.
G. Nikolentzos, P. Meladianos, S. Limnios, M. Vazirgiannis.
Proceeding of the 27th International Joint Conference on Artificial Intelligence (IJCAI '18). [pdf]

An Optimization Approach for Sub-event Detection and Summarization in Twitter.
P. Meladianos, C. Xypolopoulos, G. Nikolentzos, M. Vazirgiannis.
Proceedings of the 40th European Conference on Information Retrieval (ECIR '18).

Shortest-Path Graph Kernels for Document Similarity.
G. Nikolentzos, P. Meladianos, F. Rousseau, Y. Stavrakas, M. Vazirgiannis.
Proceedings of the 2017 Conference on Empirical Methods in Natural Language Processing (EMNLP '17).

K-clique-graphs for Dense Subgraph Discovery.
G. Nikolentzos, P. Meladianos, Y. Stavrakas, M. Vazirgiannis.
Proceedings of the 2017 European Conference on Machine Learning and Principles and Practice of Knowledge Discovery (ECML-PKDD '17).

Real-Time Keyword Extraction from Conversations.
P. Meladianos, A. Tixier, G. Nikolentzos, M. Vazirgiannis.
Proceedings of the 15th Conference of the European Chapter of the Association for Computational Linguistics (EACL '17).

Multivariate Gaussian Document Representation from Word Embeddings for Text Categorization.
G. Nikolentzos, P. Meladianos, F. Rousseau, Y. Stavrakas, M. Vazirgiannis.
Proceedings of the 15th Conference of the European Chapter of the Association for Computational Linguistics (EACL '17).

Matching Node Embeddings for Graph Similarity.
G. Nikolentzos, P. Meladianos, M. Vazirgiannis.
Proceedings of the 31st AAAI Conference on Artificial Intelligence (AAAI '17). [pdf]

Degeneracy-based Real-Time Sub-Event Detection in Twitter Stream.
P. Meladianos, G. Nikolentzos, F. Rousseau, Y. Stavrakas and M. Vazirgiannis.
Proceedings of the 9th AAAI International Conference on Web and Social Media (ICWSM '15).

AUEB at TREC 2015: Clinical Decision Support Track.
G. Nikolentzos, P. Meladianos, N. Liakis and M. Vazirgiannis.
Proceedings of TREC 2015.



Teaching

I have been a teaching assistant in the following courses at AUEB:



Software

Matching Node Embeddings for Graph Similarity code

Multivariate Gaussian Document Representation from Word Embeddings for Text Categorization code

Shortest-Path Graph Kernels for Document Similarity code



Useful Links