The lernaean hydra of data series similarity search: An experimental evaluation of the state of the art

K Echihabi, K Zoumpatianos, T Palpanas… - arXiv preprint arXiv …, 2020 - arxiv.org
Increasingly large data series collections are becoming commonplace across many different
domains and applications. A key operation in the analysis of data series collections is …

Mind the gap

M Khayati, A Lerner, Z Tymchenko… - Proceedings of the …, 2020 - sonar.ch
Recording sensor data is seldom a perfect process. Failures in power, communication or
storage can leave occasional blocks of data missing, affecting not only real-time monitoring …

Return of the lernaean hydra: Experimental evaluation of data series approximate similarity search

K Echihabi, K Zoumpatianos, T Palpanas… - arXiv preprint arXiv …, 2020 - arxiv.org
Data series are a special type of multidimensional data present in numerous domains,
where similarity search is a key operation that has been extensively studied in the data …

Unsupervised and scalable subsequence anomaly detection in large data series

P Boniol, M Linardi, F Roncallo, T Palpanas, M Meftah… - The VLDB Journal, 2021 - Springer
Subsequence anomaly (or outlier) detection in long sequences is an important problem with
applications in a wide range of domains. However, the approaches that have been …

Matrix profile goes MAD: variable-length motif and discord discovery in data series

M Linardi, Y Zhu, T Palpanas, E Keogh - Data Mining and Knowledge …, 2020 - Springer
In the last 15 years, data series motif and discord discovery have emerged as two useful and
well-used primitives for data series mining, with applications to many domains, including …

Debunking four long-standing misconceptions of time-series distance measures

J Paparrizos, C Liu, AJ Elmore… - Proceedings of the 2020 …, 2020 - dl.acm.org
Distance measures are core building blocks in time-series analysis and the subject of active
research for decades. Unfortunately, the most detailed experimental study in this area is …

Report on the first and second interdisciplinary time series analysis workshop (ITISA)

T Palpanas, V Beckmann - ACM SIGMOD Record, 2019 - dl.acm.org
The analysis of time-series data associated with modernday industrial operations and
scientific experiments is now pushing both computational power and resources to their …

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 …

Messi: In-memory data series indexing

B Peng, P Fatourou, T Palpanas - 2020 IEEE 36th International …, 2020 - ieeexplore.ieee.org
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 …