Link Prediction in Large Directed Graphs (AI + HPC)

Link Prediction in Large Directed Graphs (AI + HPC).

Dr. Ulisés Cortés

06 de Mayo de 2015

12:00 hrs.

Auditorio de Ingeniería Eléctrica

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Link prediction is a link mining task that tries to find new edges within a given graph. Among the targets of link prediction there are large directed graphs, which are frequent structures nowadays. The typical sparsity of large graphs demands of high precision predictions in order to obtain usable results. However, the size of those graphs only permits the execution of scalable algorithms. As a trade-off between those two problems we recently proposed a link prediction algorithm for directed graphs that exploits hierarchical properties.


Breve semblanza biográfica




Ulises Cortés is a Full-Professor and Researcher of the Technical University of Catalonia [] (UPC) since 1982 (tenured since 1988 and habilitated as Full-Professor since 2006) working on several areas of Artificial Intelligence (AI) in the Computer Science [] (formerly Software Department) including knowledge acquisition [] for concept formation in knowledge-based systems, as well as on machine learning [] and in autonomous intelligent agents []. Since 1989 Professor Cortés and his group have been applying their work in Artificial Intelligence to Environmental Sciences in special to Wastewater Treatment Plants with the financial support of CICyT [] and CIRIT [] and the European Union. He is a co-founder of SISLTECH [] and member of its Board of Directors since 2011. In collaboration with the Hospital de la Santa Creu i Sant Pau from 1999 until 2007, Ulises was working in the development and deployment of CARREL: An Agent Mediated Institution for the Exchange of Human Tissues among Hospitals for Transplantation" []. And in collaboration with Hospital Santa Lucia (Rome) and University of Málaga since 2001, he is working in the development and deployment of e-Tools []: Assistive technologies for the disabled and for the new generation of senior citizens []. Since 2011 he works with Prof. Pablo Rudomín [] (CINVESTAV) studing nocicepetive mechanisms in mammals.

From 1998 to 2012, he was the Coordinator of the Artificial Intelligence Ph.D. [] program for the Technical University of Catalonia. From 2012 to 2014, Prof. Cortés was Deputy vicerector for European Research at the Technical University of Catalonia. From 2007 to 2012, Professor Cortés was the Academic Coordinator of the Barcelona Supercomputing Center []; now he coordinates International Relations of BSC with Latin America. He has been the Academic Coordinator for the Inter-universitary Masters programme on Artificial Intelligence [] from 2011 (he also had this position from 2005 to 2010) and was appointed vice-dean for International Relations at the Barcelona School of Informatics [] from 1993 to 1998. Since 2012, he is a member of the Mexican "Sistema Nacional de Investigadores" with a level III. He was awarded the Advanced Research Accreditation by Agència per a la Qualitat del Sistema Universitari de Catalunya [] in 2004 and he was also appointed to the CLUSTER chair [] at the École Polytecnique Fédérale de Laussane (EPFL []) for the academic course 1998-1999.

Professor Cortés has supervised 22 PhD. Thesis [] (two of them have been awarded with the ECCAI [] AI Dissertation Award), and more than 20 Masters Thesis in the field of Artificial Intelligence. He has published more than 50 papers [] in international journals and more than 150 papers in Conferences and Workshops.