His research is mainly focused in the field of Computational Lexical Semantics and has published papers in the fields of named entity recognition, metaphor recognition and interpretation, and semantic change computation etc. His current research is directed to corpus-based knowledge acquisition and metaphor-based lexical sense acquisition. The research in corpus-based knowledge acquisition serves the purpose of constructing large-scale knowledge data-base using machine-learning techniques and novel lexical sense acquisition. The research in metaphor-based lexical sense acquisition is to acquire lexical senses in novel metaphors that are unspecified in dictionaries using both analogy-based reasoning and probabilistic cognitive models.