Rejection Sampling for Weighted Jaccard Similarity Revisited

Authors

  • Xiaoyun Li Baidu Research
  • Ping Li Baidu Research

Keywords:

Data Compression, Scalability, Parallel & Distributed Systems, Web Search & Information Retrieval

Abstract

Efficiently computing the weighted Jaccard similarity has become an active research topic in machine learning and theory. For sparse data, the standard technique is based on the consistent weighed sampling (CWS). For dense data, however, methods based on rejection sampling (RS) can be much more efficient. Nevertheless, existing RS methods are still slow for practical purposes. In this paper, we propose to improve RS by a strategy, which we call efficient rejection sampling (ERS), based on ``early stopping + densification''. We analyze the statistical property of ERS and provide experimental results to compare ERS with RS and other algorithms for hashing weighted Jaccard. The results demonstrate that ERS significantly improves the existing methods for estimating the weighted Jaccard similarity in relatively dense data.

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Published

2021-05-18

How to Cite

Li, X., & Li, P. (2021). Rejection Sampling for Weighted Jaccard Similarity Revisited. Proceedings of the AAAI Conference on Artificial Intelligence, 35(5), 4197-4205. Retrieved from https://ojs.aaai.org/index.php/AAAI/article/view/16543

Issue

Section

AAAI Technical Track on Data Mining and Knowledge Management