Time series forecasting models play a crucial role as decision support tools in various real-world domains. Among them, stock market represents a notably complex domain, characterized by a rapidly evolving temporal nature and a multitude of factors influencing stock prices. While many machine learning-based approaches...
Pi Chen, Roberto Corizzo· International Journal of Dat...· 0 citations
SPIRAL is introduced, a novel TS2I transformation designed for TSAD that maps time series windows onto a two-arm Archimedean spiral, producing asymmetric representations that preserve temporal locality while eliminating redundancy with linear time complexity with respect to window length.
Mateusz Smendowski, Kamil Faber, Piotr Nawrocki et al.· Machine-mediated learning· 0 citations
This study forms temporal concept-incremental anomaly detection for both univariate and multivariate time series, introduces time-based and entity-based concept extraction strategies together with Wasserstein-distance diagnostics for inter- and intra-concept distribution drift, and defines an evaluation protocol that m...
Mateusz Smendowski, Roberto Corizzo, Nathalie Japkowicz et al.· Journal of Grid Computing· 0 citations
PRISM is introduced, a plug-and-play meta-workflow enabling systematic construction and evaluation of image-based representations for multivariate TSAD and channelization is identified - how the channel dimension of multi-channel images is constructed - as a critical and previously understudied design dimension.
Mateusz Smendowski, Kamil Faber, Piotr Nawrocki et al.· 0 citations
Multimodal Graph Neural Networks have become standard for recommendation by augmenting sparse interaction data with content features. Yet current architectures face two bottlenecks: structural rigidity, from a reliance on static precomputed similarity graphs that cannot adapt to evolving preferences; and semantic fragi...
Ahmad Mousavi, Majid Alikhani, Yeon-Chang Lee et al.· 0 citations
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