On the Representation and Embedding of Knowledge Bases Beyond Binary
Relations
PRESENTER:
Yongyi Mao
University of Ottawa
ABSTRACT:
The models developed to date for knowledge base embedding are all based on
the assumption that the relations contained in knowledge bases are binary.
For the training and testing of these embedding models, multi-fold (or
n-ary) relational data are converted to triples (e.g., in FB15K dataset)
and interpreted as in- stances of binary relations. In this talk, I
present a canonical representation of knowledge bases containing
multi-fold relations. I will show that the existing embedding models on
the popular FB15K datasets correspond to a sub-optimal modelling
framework, resulting in a loss of structural information. We advocate a
novel modelling framework, which models multi-fold relations directly
using this canonical representation. Based on this framework, the existing
TransH model is generalized to a new model, m-TransH. We demonstrate
experimentally that m-TransH outperforms TransH by an astonishingly large
margin, thereby establishing a new state of the art. This is a joint work
with Professors Richong Zhang's research groups at Beihang University,
China. The work will be presented at IJCAI 2016 this summer.
Bio:
Yongyi Mao received his Bachelor of Engineering degree at the
Southeast University (Nanjing, China) in 1992. In 1995, he received his
medical degree at Nanjing Medical University (Nanjing, China). In 1998,
Yongyi Mao obtained his Master of Science degree at the University of
Toronto, in the Department of Medical Biophysics . In 2003, he completed
his PhD in electrical engineering at the University of Toronto and joined
the faculty of School of Information Technology and Engineering at the
University of Ottawa as an Assistant Professor. He was promoted to
Associate Professor in 2008 and then to Full Professor in 2012. Yongyi
Mao's research includes communications and machine learning two main
areas.
Since 2008, Yongyi Mao is a director of Canadian Society of Information
Theory. From 2011 to 2013, he served as an Editor for IEEE Transactions on
Wireless Communications. He is currently an Associate Editor for IEEE
Transactions on Information Theory.