Ground-based whole-sky imagers provide cloud cover data to determine solar observing conditions. Deep segmentation models exceed 0.87 mean intersection-over-union (IoU, shared area over union) on public benchmarks, but need not transfer to an operating site. We release CLOUD99, a dataset of 99 annotated whole-sky image...
The booming data volume of modern time-domain surveys demands fast, robust early classification of sparsely sampled light curves, as newly discovered transients typically have only a handful of observations. We compare classifiers for extremely sparse light curves (3–30 observations) on a benchmark of approximately 1.7...
Xue-Li Lin, Zi-Han Qian, Cun-Shi Wang et al.· Universe· 0 citations
Summary Large-scale spectroscopic surveys contain numerous low-SNR stellar spectra that are difficult to analyze with traditional pipelines but remain valuable for Galactic archaeology, chemical-evolution studies, and population-level stellar characterization. We propose an order-agnostic foundation model that represen...
Jia-Chen Xu, Xin Song, Yu-Yang Li et al.· iScience· 0 citations
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