Cross-Lingual Document Retrieval with Smooth Learning

Jiapeng Liu     Xiao Zhang     Dan Goldwasser     Xiao Wang    
International Conference on Computational Linguistics (CoLING), 2020


Cross-lingual document search is an information retrieval task in which the queries’ language and the documents’ language are different. In this paper, we study the instability of neural document search models and propose a novel end-to-end robust framework that achieves improved performance in cross-lingual search with different documents’ languages. This framework includes a novel measure of the relevance, smooth cosine similarity, between queries and documents, and a novel loss function, Smooth Ordinal Search Loss, as the objective function. We further provide theoretical guarantee on the generalization error bound for the proposed framework. We conduct experiments to compare our approach with other document search models, and observe significant gains under commonly used ranking metrics on the cross-lingual document retrieval task in a variety of languages.

Bib Entry

    author = "Jiapeng Liu and Xiao Zhang and Dan Goldwasser and Xiao Wang",
    title = "Cross-Lingual Document Retrieval with Smooth Learning",
    booktitle = "International Conference on Computational Linguistics (CoLING)",
    year = "2020"