output
20072026
most citedSeries2Graph: Graph-based Subsequence Anomaly Detection for Time Series

99 citations

Showing cs.DBShow all

7 papers · 1 filter

cs.DB2026★ 13 cited

SEAnet: A Deep Learning Architecture for Data Series Similarity Search

Qitong Wang, Themis Palpanas

A key operation for massive data series collection analysis is similarity search. According to recent studies, SAX-based indexes offer state-of-the-art performance for similarity s…

cs.DB2026

An In-Depth Study of Filter-Agnostic Vector Search on a PostgreSQL Database System: [Experiments and Analysis]

Duo Lu, Helena Caminal, Manos Chatzakis +4

Filtered Vector Search (FVS) is critical for supporting semantic search and GenAI applications in modern database systems. However, existing research most often evaluates algorithm…

cs.DB2025★ 8 cited

DARTH: Declarative Recall Through Early Termination for Approximate Nearest Neighbor Search

Manos Chatzakis, Yannis Papakonstantinou, Themis Palpanas

Approximate Nearest Neighbor Search (ANNS) presents an inherent tradeoff between performance and recall (i.e., result quality). Each ANNS algorithm provides its own algorithm-depen…

cs.DB2025★ 8 cited

LeaFi: Data Series Indexes on Steroids with Learned Filters

Qitong Wang, Ioana Ileana, Themis Palpanas

The ever-growing collections of data series create a pressing need for efficient similarity search, which serves as the backbone for various analytics pipelines. Recent studies hav…

cs.DB2024★ 5 cited

DumpyOS: A Data-Adaptive Multi-ary Index for Scalable Data Series Similarity Search

Zeyu Wang, Qitong Wang, Peng Wang +2

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 app…

cs.DB2024★ 24 cited

DET-LSH: A Locality-Sensitive Hashing Scheme with Dynamic Encoding Tree for Approximate Nearest Neighbor Search

Jiuqi Wei, Botao Peng, Xiaodong Lee +1

Locality-sensitive hashing (LSH) is a well-known solution for approximate nearest neighbor (ANN) search in high-dimensional spaces due to its robust theoretical guarantee on query…

cs.DB2020★ 1 cited

ParIS+: Data Series Indexing on Multi-Core Architectures

Botao Peng, Panagiota Fatourou, Themis Palpanas

Data series similarity search is a core operation for several data series analysis applications across many different domains. Nevertheless, even state-of-the-art techniques cannot…