SpectraNet: a lightweight hybrid time-frequency deep learning framework for sustainable cloud workload forecasting. - Nahin F. Siddiqui; Zarif Safwan Hoque; Md. Ehsanul Haque; Abu Raihan Mostofa Kamal; A. K. M. Azad; Salem A. Alyami; Md Azam Hossain (J. Cloud Comput., 2025)