Lei Xia


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A Random Graph Walk based Approach to Computing Semantic Relatedness Using Knowledge from Wikipedia
Ziqi Zhang | Anna Lisa Gentile | Lei Xia | José Iria | Sam Chapman
Proceedings of the Seventh International Conference on Language Resources and Evaluation (LREC'10)

Determining semantic relatedness between words or concepts is a fundamental process to many Natural Language Processing applications. Approaches for this task typically make use of knowledge resources such as WordNet and Wikipedia. However, these approaches only make use of limited number of features extracted from these resources, without investigating the usefulness of combining various different features and their importance in the task of semantic relatedness. In this paper, we propose a random walk model based approach to measuring semantic relatedness between words or concepts, which seamlessly integrates various features extracted from Wikipedia to compute semantic relatedness. We empirically study the usefulness of these features in the task, and prove that by combining multiple features that are weighed according to their importance, our system obtains competitive results, and outperforms other systems on some datasets.


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Too Many Mammals: Improving the Diversity of Automatically Recognized Terms
Ziqi Zhang | Lei Xia | Mark A. Greenwood | José Iria
Proceedings of the International Conference RANLP-2009


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An Approach to Modeling Heterogeneous Resources for Information Extraction
Lei Xia | José Iria
Proceedings of the Sixth International Conference on Language Resources and Evaluation (LREC'08)

In this paper, we describe an approach that aims to model heterogeneous resources for information extraction. Document is modeled in graph representation that enables better understanding of multi-media document and its structure which ultimately could result better cross-media information extraction. We also describe our proposed algorithm that segment document-based on the document modeling approach we described in this paper.


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WIT: Web People Search Disambiguation using Random Walks
José Iria | Lei Xia | Ziqi Zhang
Proceedings of the Fourth International Workshop on Semantic Evaluations (SemEval-2007)