TILDE vs. Aquaplot Explorer

TILDE (Term Independent Likelihood moDEl) functions as a framework designed for the re-ranking and expansion of passages, leveraging BERT to enhance retrieval performance by combining sparse term matching with sophisticated contextual representations. The original TILDE version computes term weights across the entire BERT vocabulary, which often leads to extremely large index sizes. To address this limitation, TILDEv2 introduces a more efficient approach by calculating term weights exclusively for words present in the expanded passages, resulting in indexes that can be 99% smaller than those produced by the initial TILDE model. This improved efficiency is achieved by deploying TILDE as a passage expansion model, which enriches passages with top-k terms (for instance, the top 200) to improve their content quality. Furthermore, it provides scripts that streamline the processes of indexing collections, re-ranking BM25 results, and training models using datasets such as MS MARCO, thus offering a well-rounded toolkit for enhancing information retrieval tasks. In essence, TILDEv2 signifies a major leap forward in the management and optimization of passage retrieval systems, contributing to more effective and efficient information access strategies. This progression not only benefits researchers but also has implications for practical applications in various domains.

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