Elpis: Graph-based similarity search for scalable data science

I Azizi, K Echihabi, T Palpanas - Proceedings of the VLDB Endowment, 2023 - dl.acm.org
The recent popularity of learned embeddings has fueled the growth of massive collections of
high-dimensional (high-d) vectors that model complex data. Finding similar vectors in these …

Evolution of a Data Series Index: The iSAX Family of Data Series Indexes: iSAX, iSAX2. 0, iSAX2+, ADS, ADS+, ADS-Full, ParIS, ParIS+, MESSI, DPiSAX, ULISSE …

T Palpanas - … and Personalization: 13th International Workshop, ISIP …, 2020 - Springer
There is an increasingly pressing need, by several applications in diverse domains, for
developing techniques able to index and mine very large collections of sequences, or data …

SING: Sequence indexing using GPUs

B Peng, P Fatourou, T Palpanas - 2021 IEEE 37th International …, 2021 - ieeexplore.ieee.org
Data series similarity search is a core operation for several data series analysis applications
across many domains. This has attracted lots of interest that led to the development of …

Visual analysis of air pollution spatio-temporal patterns

J Li, C Bi - The Visual Computer, 2023 - Springer
Advances in air monitoring methods have made it possible to analyze large-scale air
pollution phenomena. Mining potential air pollution information from large-scale air pollution …

DumpyOS: A data-adaptive multi-ary index for scalable data series similarity search

Z Wang, Q Wang, P Wang, T Palpanas, W Wang - The VLDB Journal, 2024 - Springer
Data series indexes are necessary for managing and analyzing the increasing amounts of
data series collections that are nowadays available. These indexes support both exact and …

Dumpy: A compact and adaptive index for large data series collections

Z Wang, Q Wang, P Wang, T Palpanas… - Proceedings of the ACM …, 2023 - dl.acm.org
Data series indexes are necessary for managing and analyzing the increasing amounts of
data series collections that are nowadays available. These indexes support both exact and …

Odyssey: A journey in the land of distributed data series similarity search

M Chatzakis, P Fatourou, E Kosmas… - arXiv preprint arXiv …, 2023 - arxiv.org
This paper presents Odyssey, a novel distributed data-series processing framework that
efficiently addresses the critical challenges of exhibiting good speedup and ensuring high …

Deep learning embeddings for data series similarity search

Q Wang, T Palpanas - Proceedings of the 27th ACM SIGKDD …, 2021 - dl.acm.org
A key operation for the (increasingly large) data series collection analysis is similarity
search. According to recent studies, SAX-based indexes offer state-of-the-art performance …

Fast data series indexing for in-memory data

B Peng, P Fatourou, T Palpanas - The VLDB Journal, 2021 - Springer
Data series similarity search is a core operation for several data series analysis applications
across many different domains. However, the state-of-the-art techniques fail to deliver the …

Data series progressive similarity search with probabilistic quality guarantees

A Gogolou, T Tsandilas, K Echihabi… - Proceedings of the …, 2020 - dl.acm.org
Existing systems dealing with the increasing volume of data series cannot guarantee
interactive response times, even for fundamental tasks such as similarity search. Therefore …