Top-k on Sequences: A New Approach to Enhanced Similarity Search - Archive ouverte HAL
Communication Dans Un Congrès Année : 2024

Top-k on Sequences: A New Approach to Enhanced Similarity Search

Sara Jarrad
  • Fonction : Auteur
  • PersonId : 1196516
Hubert Naacke
Stéphane Gançarski

Résumé

Performing efficient top-k similarity search on massive data sets is challenging due to the increasing complexity with data scale, and many existing methods are computationally expensive. In this context, top-k sequence similarity search, which aims to identify the k most relevant sequences to a query sequence using a scoring function, becomes a critical task. We argue that the similarity between two sequences should not be based only on their longest common subsequence, but should consider all common subsequences. This approach allows for a more comprehensive similarity score, recognising as more similar sequences that share many subsequences and thus providing a more meaningful ranking. Our study addresses these challenges by proposing: (1) a novel scoring function that assigns higher scores to candidates that share more subsequences with a query sequence, and (2) an efficient method that factorises the computation while computing all sequence scores simultaneously. Our contributions include a detailed analysis of existing techniques and the proposal of an efficient method for top-k similarity search. We validate our approach through extensive experimental evaluations and demonstrate its efficiency compared to a baseline method. Our results provide a promising solution for sequence similarity search that significantly improves the speed of top-k sequence retrieval in large mobility datasets.
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Dates et versions

hal-04691698 , version 1 (09-09-2024)

Identifiants

  • HAL Id : hal-04691698 , version 1

Citer

Sara Jarrad, Hubert Naacke, Stéphane Gançarski. Top-k on Sequences: A New Approach to Enhanced Similarity Search. International Conference on Information Integration and Web Intelligence (iiWAS), Dec 2024, Bratislava, Slovakia. ⟨hal-04691698⟩
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