license:cc-by-4.0 size_categories:100M<n<1B format:parquet modality:tabular modality:text modality:timeseries library:datasets library:dask library:mlcroissant library:polars arxiv:2505.14596 doi:10.57967/hf/6689 region:us timeseries timeseries clustering changepoint-detection correlation-structure synthetic benchmark