Novel residual hybrid machine learning for solar activity prediction in smart cities. - Rabiu Aliyu Abdulkadir; Mohammad Kamrul Hasan; Shayla Islam; Thippa Reddy Gadekallu; Bishwajeet Pandey; Nurhizam Safie 001; Mikael Syväjärvi; Mohamed Nasor (Earth Sci. Informatics, 2023)